CN111135600A - Conversion stripping device for preventing ammonium salt crystallization from reducing corrosion by ammonia-containing acidic gas - Google Patents
Conversion stripping device for preventing ammonium salt crystallization from reducing corrosion by ammonia-containing acidic gas Download PDFInfo
- Publication number
- CN111135600A CN111135600A CN202010006557.1A CN202010006557A CN111135600A CN 111135600 A CN111135600 A CN 111135600A CN 202010006557 A CN202010006557 A CN 202010006557A CN 111135600 A CN111135600 A CN 111135600A
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- Prior art keywords
- stripping
- gas
- water separator
- condensable gas
- carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/38—Steam distillation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
- B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/009—Collecting, removing and/or treatment of the condensate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/0093—Removing and treatment of non condensable gases
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/06—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
- C01B3/12—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents by reaction of water vapour with carbon monoxide
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a shift stripping device for preventing ammonium salt crystallization from being reduced and corroded by ammonia-containing acidic gas, which is characterized by comprising a carbon dioxide stripping tower, a stripping gas cooler, a stripping gas-water separator and a non-condensable gas heater which are sequentially connected; the bottom of the carbon dioxide stripping tower is connected with a steam pipeline, the middle part of the carbon dioxide stripping tower is connected with a conversion high-temperature condensate pipe, the stripping gas cooler is connected with the middle part of the stripping gas-water separator, and the non-condensable gas heater is connected with the top of the stripping gas-water separator; and the outlet of the non-condensable gas heater is respectively connected with an input boiler room pipeline and an input torch pipeline. The temperature raising device has the advantages of high efficiency, simple structure, one-time investment, convenient manufacturing and operation, effective raising of the temperature of the non-condensable gas, contribution to long-period operation of the system, good economy, solving of the phenomenon that the outlet temperature of the non-condensable gas of the existing conversion device is low to form ammonium salt crystals, and avoiding of environmental pollution caused by insufficient combustion of the non-condensable gas in the subsequent system sulfur recovery or torch.
Description
Technical Field
The invention relates to a shift stripping device for preventing ammonium salt crystallization from being reduced and corroding by ammonia-containing acid gas.
Background
After the shift conversion device generates shift reaction to release heat, the heat is recovered through the by-product steam of each grade, the water gas of the shift conversion device is condensed into liquid condensate, and the condensate is rich in CO2、H2S、NH3And after various gases are converged by condensate liquid at each stage, the gas enters a conversion stripping device, a stripping system of the conversion device is added with steam to heat and flash the gas in the process condensate liquid, the stripped non-condensable gas enters the process condensate liquid at 145 ℃ through preheating, the temperature is reduced to 40-80 ℃, and the non-condensable gas is discharged from a boundary area or a sulfur recovery device. Condensate generated after the top noncondensable gas is condensed returns to the stripping tower to be used as reflux, and the bottom is stripped to obtain qualified condensate (NH)3The N content is 50mg/L) is pressurized by a high-pressure condensate pump and then sent to gasification for recycling as washing water. The temperature of the non-condensable gas at the top of the stripping tower is 40-80 ℃ after being cooled, the non-condensable gas is longer in pipeline when being sent to a boundary region and simultaneously contains CO2And NH3When the gas is cooled to less than 70 ℃, ammonium salt crystallization can be formed, pipelines are blocked, great hidden dangers are brought to production and operation, and a stripping system can be stopped seriously.
Disclosure of Invention
The invention provides a conversion stripping device for preventing ammonium salt crystallization and reducing corrosion by ammonia-containing acid gas, aiming at solving the problem of ammonium salt crystallization of an outlet pipeline caused by low temperature of non-condensable gas of a stripping system of the conversion device in the prior art. The noncondensable gas outlet is heated to 170 ℃ by adopting a 0.6Mpa noncondensable gas heater and sent to a boundary region, so that the problem of ammonium salt crystallization due to low temperature is solved.
The invention discloses a shift stripping device for preventing ammonium salt crystallization from being reduced and corroded by ammonia-containing acidic gas, which comprises a carbon dioxide stripping tower, a stripping gas cooler, a stripping gas water separator and a noncondensable gas heater, which are sequentially connected; the bottom of the carbon dioxide stripping tower is connected with a steam pipeline, the middle part of the carbon dioxide stripping tower is connected with a conversion high-temperature condensate pipe, the stripping gas cooler is connected with the middle part of the stripping gas-water separator, and the non-condensable gas heater is connected with the top of the stripping gas-water separator; and the outlet of the non-condensable gas heater is respectively connected with an input boiler room pipeline and an input torch pipeline.
Further, in the above technical solution, the bottom of the stripping gas-water separator is connected to a condensate tank.
Further, in the technical scheme, the non-condensable gas heater adopts low-pressure steam to heat to 170 ℃ or above.
Advantageous effects of the invention
The temperature raising device has the advantages of high efficiency, simple structure, one-time investment, convenient manufacturing and operation, effective raising of the temperature of the non-condensable gas, contribution to long-period operation of the system, good economy, solving of the phenomenon that the outlet temperature of the non-condensable gas of the existing conversion device is low to form ammonium salt crystals, and avoiding of environmental pollution caused by insufficient combustion of the non-condensable gas in the subsequent system sulfur recovery or torch.
Drawings
FIG. 1 is a schematic diagram of the configuration of a shift stripping apparatus of the present invention;
in the figure, 1 is a carbon dioxide stripping tower, 2 is a conversion high-temperature condensate pipe, 3 is a stripping gas cooler, 4 is a stripping gas-water separator, 5 is a condensate tank, 6 is a non-condensable gas heater, 7 is input into a boiler room pipeline, and 8 is input into a torch pipeline.
Detailed Description
The following non-limiting examples will allow one of ordinary skill in the art to more fully understand the present invention, but are not intended to limit the invention in any way.
Example 1
As shown in fig. 1, a shift stripping apparatus comprises a carbon dioxide stripping tower 1, a stripping gas cooler 3, a stripping gas-water separator 4, and a non-condensable gas heater 6, which are connected in sequence; the bottom of the carbon dioxide stripping tower 1 is connected with a steam pipeline, the middle part of the carbon dioxide stripping tower 1 is connected with a conversion high-temperature condensate pipe 2, the stripping gas cooler 3 is connected with the middle part of the stripping gas-water separator 4, and the non-condensable gas heater 6 is connected with the top of the stripping gas-water separator 4; the outlet of the non-condensable gas heater 6 is respectively connected with an input boiler room pipeline 7 and an input torch pipeline 8, and the bottom of the stripping gas-water separator 4 is connected with a condensate tank 5.
The shift stripping device comprises the following use processes: the conversion device condensate is preheated and enters the middle upper part of a carbon dioxide stripping tower 1 through a conversion high-temperature condensate pipe 2, 0.6MPa (G) steam enters from the bottom of the carbon dioxide stripping tower 1 to serve as a heat source of the carbon dioxide stripping tower 1, acid gas on the top of the carbon dioxide stripping tower 1 is cooled to 60 ℃ through a stripping gas cooler 3 and then enters a stripping gas-water separator 4, and condensate separated by the stripping gas-water separator 4 is pressurized by a pump and then is sent to a condensate tank 5. The non-condensable gas after cooling and separating most of water enters a non-condensable gas heater 6, is heated to 170 ℃ by low-pressure steam of 0.6MPa (G), and then is sent to a boiler room and sent to a torch during start-up and shutdown.
Claims (3)
1. A shift stripping device for preventing ammonium salt crystallization from reducing corrosion by ammonia-containing acidic gas is characterized by comprising a carbon dioxide stripping tower, a stripping gas cooler, a stripping gas-water separator and a noncondensable gas heater which are connected in sequence; the bottom of the carbon dioxide stripping tower is connected with a steam pipeline, the middle part of the carbon dioxide stripping tower is connected with a conversion high-temperature condensate pipe, the stripping gas cooler is connected with the middle part of the stripping gas-water separator, and the non-condensable gas heater is connected with the top of the stripping gas-water separator; and the outlet of the non-condensable gas heater is respectively connected with an input boiler room pipeline and an input torch pipeline.
2. The shift stripping apparatus according to claim 1, characterized in that: the bottom of the stripping gas-water separator is connected with a condensate tank.
3. The shift stripping apparatus according to claim 1, characterized in that: the non-condensable gas heater adopts low-pressure steam to heat to 170 ℃ or above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006557.1A CN111135600A (en) | 2020-01-03 | 2020-01-03 | Conversion stripping device for preventing ammonium salt crystallization from reducing corrosion by ammonia-containing acidic gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006557.1A CN111135600A (en) | 2020-01-03 | 2020-01-03 | Conversion stripping device for preventing ammonium salt crystallization from reducing corrosion by ammonia-containing acidic gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111135600A true CN111135600A (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010006557.1A Pending CN111135600A (en) | 2020-01-03 | 2020-01-03 | Conversion stripping device for preventing ammonium salt crystallization from reducing corrosion by ammonia-containing acidic gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111135600A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4335867A1 (en) * | 1993-10-21 | 1995-05-04 | Hans Dr Remstedt | Process for the simultaneous removal of sulphur oxides and nitrogen oxides from combustion exhaust gases in an ammonia scrubber |
| JP2005239934A (en) * | 2004-02-27 | 2005-09-08 | Kawasaki Engineering Co Ltd | Method for treating excess ammoniacal liquor |
| CN102502706A (en) * | 2011-11-03 | 2012-06-20 | 兖州煤业榆林能化有限公司 | Method for reclaiming ammonium hydrogen carbonate from non-condensable gas of stripping tower |
| CN103101988A (en) * | 2013-01-29 | 2013-05-15 | 中国五环工程有限公司 | Method for stripping gas washing water |
| CN103318847A (en) * | 2013-07-08 | 2013-09-25 | 中石化南京工程有限公司 | High-efficiency sulfur recovery method of waste gas containing hydrogen sulfide |
| CN104250569A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Anticorrosion method and apparatus thereof for raw material gas condensate liquid in coal water slurry gasification technology |
| CN107129836A (en) * | 2017-05-12 | 2017-09-05 | 华能（天津）煤气化发电有限公司 | A kind of ammonia nitrogen removal apparatus and method based on integral gasification combined circulation technology gas gasification and desulfurization unit |
| CN107823906A (en) * | 2017-09-19 | 2018-03-23 | 鲁西化工集团股份有限公司 | A kind of raw gas conversion process condensate liquid stripping processing system and method |
-
2020
- 2020-01-03 CN CN202010006557.1A patent/CN111135600A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4335867A1 (en) * | 1993-10-21 | 1995-05-04 | Hans Dr Remstedt | Process for the simultaneous removal of sulphur oxides and nitrogen oxides from combustion exhaust gases in an ammonia scrubber |
| JP2005239934A (en) * | 2004-02-27 | 2005-09-08 | Kawasaki Engineering Co Ltd | Method for treating excess ammoniacal liquor |
| CN102502706A (en) * | 2011-11-03 | 2012-06-20 | 兖州煤业榆林能化有限公司 | Method for reclaiming ammonium hydrogen carbonate from non-condensable gas of stripping tower |
| CN103101988A (en) * | 2013-01-29 | 2013-05-15 | 中国五环工程有限公司 | Method for stripping gas washing water |
| CN104250569A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Anticorrosion method and apparatus thereof for raw material gas condensate liquid in coal water slurry gasification technology |
| CN103318847A (en) * | 2013-07-08 | 2013-09-25 | 中石化南京工程有限公司 | High-efficiency sulfur recovery method of waste gas containing hydrogen sulfide |
| CN107129836A (en) * | 2017-05-12 | 2017-09-05 | 华能（天津）煤气化发电有限公司 | A kind of ammonia nitrogen removal apparatus and method based on integral gasification combined circulation technology gas gasification and desulfurization unit |
| CN107823906A (en) * | 2017-09-19 | 2018-03-23 | 鲁西化工集团股份有限公司 | A kind of raw gas conversion process condensate liquid stripping processing system and method |
Non-Patent Citations (2)
| Title |
|---|
| 李菁菁: "一种酸性水单塔低压汽提工艺能耗分析及节能措施", 《炼油技术与工程》 * |
| 陈莉: "一种含氨酸性气防止铵盐结晶减小腐蚀的变换汽提装置", 《化工设计》 * |
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Application publication date: 20200512 |
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