CN1057477C - Steam purifying method and apparatus for change-over system of synthetic ammonia plant - Google Patents
Steam purifying method and apparatus for change-over system of synthetic ammonia plant Download PDFInfo
- Publication number
- CN1057477C CN1057477C CN98113544A CN98113544A CN1057477C CN 1057477 C CN1057477 C CN 1057477C CN 98113544 A CN98113544 A CN 98113544A CN 98113544 A CN98113544 A CN 98113544A CN 1057477 C CN1057477 C CN 1057477C
- Authority
- CN
- China
- Prior art keywords
- steam
- purifier
- gas
- transformation
- inlet
- 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.)
- Expired - Lifetime
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 34
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract 3
- 238000006243 chemical reaction Methods 0.000 claims description 34
- 239000000945 filler Substances 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000013020 steam cleaning Methods 0.000 claims 4
- 238000004140 cleaning Methods 0.000 claims 2
- 238000009423 ventilation Methods 0.000 claims 2
- 230000009466 transformation Effects 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 239000007787 solid Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract 3
- 238000011033 desalting Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 3
- QXYJCZRRLLQGCR-UHFFFAOYSA-N dioxomolybdenum Chemical compound O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- AFTDTIZUABOECB-UHFFFAOYSA-N [Co].[Mo] Chemical class [Co].[Mo] AFTDTIZUABOECB-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- WHDPTDWLEKQKKX-UHFFFAOYSA-N cobalt molybdenum Chemical compound [Co].[Co].[Mo] WHDPTDWLEKQKKX-UHFFFAOYSA-N 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Abstract
The present invention relates to a method and an apparatus for purifying steam of a transformation system in a synthetic ammonia plant. After the steam is directly mixed with part of transformation gas and superheated to reach 10 to 100DEG C above dew point, the steam passes through a fixed bed purifier so that solid impurities in the superheated steam are precipitated, trapped and separated to prevent the impurities of the superheated steam from entering a bed layer of a transformation catalyst. The fixed bed purifier comprises a purifier (1), a build-in filling material (2), a steam inlet (3), a transformation gas inlet (4) and a purified gas mixture outlet (5), wherein a transformation gas straight through subline (6) and a regulating valve (7) which are arranged beside the purifier (1) are used for regulating temperature; a nitrogen inlet or a steam inlet and a nitrogen outlet or a steam outlet which are arranged above and below a filling material layer are used for bringing in the nitrogen (or the steam) when the material is unloaded or filled, and thereby, the air is prevented from entering a transformation furnace. The diameter of the purifier, which is generally 10% to 100% of that of the transformation furnace, is preferably 30% to 40% of that of the transformation furnace. The method which can omit water desalting equipment for preparing the steam is easy to master.
Description
The invention relates to a method and a device for separating solid impurities in steam by a conversion system of a synthetic ammonia plant.
At present, more than 100 families and small synthetic ammonia plants in the whole country adopt ZL90103262.X 'carbon monoxide low-temperature transformation process', which is called total low-temperature transformation process for short, and the inventor perfects and improves on the basis of the patent. The process conversion is carried out in two sections or three sections and four sections, and a cobalt-molybdenum series sulfur-resistant low-temperature high-activity conversion catalyst (EB-4 catalyst developed by chemical research institute in Hubei province) is completely used. Because the steam can cause the reversion, i.e. hydrolysis, of the cobalt-molybdenum sulfur-tolerant shift catalyst, the reversion causes MoS2Conversion to inactive MoO2，
The invention aims to provide a steam purification method and a steam purification device for a conversion system of a synthetic ammonia plant, which can prevent solid impurities in steam from entering a catalyst bed layer of a conversion furnace.
The steam and part of high-temp conversion gas are mixed and superheated to above dew point, then fed into a fixed-bed steam purifier filled with alumina small balls or rings or waste conversion catalyst filler to make the soluble impurities in the steam or/and fog be separated out, retained and deposited on the filler in the purifier, and the gas is fed into conversion furnace so as to protect the catalyst in the conversion furnace.
The temperature of the mixed steam and the converted gas is generally 10 to 100 ℃ above the dew point, and preferably 30 to 50 ℃ above the dew point. The gas flow rate is increased due to the fact that the temperature is too high, impurities in the gas cannot be intercepted and deposited, the resistance of a bed layer is increased, impurities in water vapor or mist cannot be separated out due to the fact that the temperature is low, and the purifying effect is lost.
A device for steam purification of a shift system of a synthetic ammonia plant comprises a fixed bed impurity separation purifier, wherein a filler is arranged in the purifier, a steam inlet pipe extending into the purifier is arranged at the upper part of the fixed bed impurity separation purifier, a high-temperature shift gas inlet is arranged on the steam inlet pipe, the space on the filler layer in the purifier is a mixed space of steam and high-temperature shift gas, a mixed gas outlet is arranged at the lower part of the fixed bed impurity separation purifier, a high-temperature shift gas direct-connection auxiliary line and a regulating valve are arranged beside the purifier, a temperature measurer is inserted in the filler layer, a nitrogen or steam inlet and outlet are arranged at the upper part and the lower part of the filler layer, the diameter of the purifier is 10% -100%, preferably 30% -40% of the diameter of a. The diameter of the straight-through secondary line is 1/2 times of the main pipeline diameter, and the fixed bed is generally phi 800 and the height is 1.0 meter. The secondary line is used for adjusting the high-temperature conversion gas quantity entering the purifier and controlling the temperature of the mixed gas of the steam and the high-temperature conversion gas, and the pipe diameter is not too large or too small.
The purifier is filled with alumina pellets or rings or waste shift catalyst, the alumina pellets are phi-4 mm.
When the steam purifier is used for purifying steam, solid impurities in the steam can be intercepted and deposited on the filler, and the filler can be detached, sieved and reloaded after the purifier is blocked.
The invention has the advantages of easy control and saving huge investment for preparing steam by desalted water.
FIG. 1 is a schematic view of a steam purification apparatus of a shift system of a synthetic ammonia plant
The steam purifier of the conversion system of the synthetic ammonia plant shown in figure 1 comprises a purifier tank 1, wherein alumina spherical filler 2 is arranged in the purifier, a steam inlet pipe 3 is arranged at the upper part of the purifier, a high-temperature conversion gas inlet pipe 4 is arranged at the upper part of the purifier, the steam inlet pipe 3 is a bent pipe extending into the upper part of the purifier, the outlet of the steam inlet pipe is upward, the outlet of the high-temperature conversion gas inlet pipe 4 is downward opposite to the outlet of the steam inlet pipe 3, the steam and the conversion gas are mixed in the upper space of a filler layer in the purifier, the lower part of the high-temperature conversion gas inlet pipe is provided with an outlet 5 for purifying the mixed gas of the steam and the high-temperature conversion gas, a high-temperature conversion gas direct-through secondary line 6 is arranged beside the purifier, a regulating valve 7 is used for regulating the high-temperature conversion gas, so as to regulate the temperature after the mixing of part of the high-temperature conversion gas and, to prevent air from entering the shift converter, a temperature measuring point T is arranged in the packing bed layer.
The embodiment, Anhui and Hunan middle and small ammonia synthesis plants omit desalted water equipment for preparing steam, a conversion system uses the steam purification method and device of the invention, the diameter of a conversion furnace is 3000mm, the diameter of a purifier is 800mm, the height is 1.0 m, alumina balls with the diameter of 4mm are filled in the conversion furnace, the diameter of a gas main pipeline is 426mm, the diameter of a secondary pipeline is 216mm, after the purifier is used for half a year, the purifier is blocked by impurities, alumina filler in the purifier is taken out only in half a day, sieved and reassembled for use. Therefore, soluble impurities in steam or/and mist are prevented from entering the conversion catalyst bed layer, and the normal production of the conversion process is ensured.
Claims (6)
1. A steam purifying method for the transform system of synthetic ammonia plant features that the steam and part of high-temp transform gas are mixed and superheated to dew point, then they are fed into a fixed-bed steam purifier containing alumina balls or rings or used transform catalyst filler to make the soluble impurities in steam and/or fog be separated out, trapped and deposited on the filler in the purifier, and the purified steam is fed into transform furnace.
2. The steam cleaning method as claimed in claim 1, characterized in that the mixture of steam and part of the high-temperature ventilation gas is superheated to 10-100 ℃ above the dew point and then enters a fixed-bed steam cleaner for cleaning.
3. A steam cleaning method according to claim 1 or 2, characterized in that the mixture of steam and part of the high temperature change gas is superheated to 30-50 ℃ above the dew point and then enters a fixed bed steam cleaner for cleaning.
4. A steam purification device of a conversion system of a synthetic ammonia plant comprises a fixed bed purifier (1), alumina balls or rings or waste conversion catalyst fillers (2) arranged in the purifier (1), a steam inlet (3) and a gas outlet (5), it is characterized in that the upper part of the steam inlet is provided with a high-temperature conversion gas inlet (4), the steam inlet (3) is a bent pipe extending into the upper space in the purifier (1), the outlet of the purifier is rightupward, the high-temperature conversion gas inlet (4) faces downward to the outlet of the steam inlet pipe (3), a high-temperature conversion gas direct-through auxiliary line (6) and an adjusting valve (7) are arranged beside the purifier (1), a temperature detector T is inserted in a packing layer, nitrogen or steam inlets (8) and (9) are arranged above and below the packing layer, the diameter of the purifier (1) is 10-100% of that of the conversion furnace, and the height of the purifier (1) is 1.0-2.0 times of that of the purifier.
5. Steam cleaning apparatus according to claim 4, characterized in that the diameter of the cleaner (1) is 30-40% of the diameter of the shift converter.
6. Steam cleaning plant according to claim 4 or 5, characterized in that the diameter of the high temperature ventilation gas through secondary line (6) is 1/2 of the primary pipe diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98113544A CN1057477C (en) | 1998-05-08 | 1998-05-08 | Steam purifying method and apparatus for change-over system of synthetic ammonia plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98113544A CN1057477C (en) | 1998-05-08 | 1998-05-08 | Steam purifying method and apparatus for change-over system of synthetic ammonia plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1202387A CN1202387A (en) | 1998-12-23 |
| CN1057477C true CN1057477C (en) | 2000-10-18 |
Family
ID=5223261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98113544A Expired - Lifetime CN1057477C (en) | 1998-05-08 | 1998-05-08 | Steam purifying method and apparatus for change-over system of synthetic ammonia plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1057477C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076139A (en) * | 1991-12-21 | 1993-09-15 | O·F·迪特里希 | Purification contains the method and the device thereof of gas, waste gas steam and the salt solution of undesirable chemical substance |
| CN1167813A (en) * | 1996-06-06 | 1997-12-17 | 陈绍维 | Engineering and apparatus for purifying and regenerating coal gas by active carbon desulfurization |
-
1998
- 1998-05-08 CN CN98113544A patent/CN1057477C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076139A (en) * | 1991-12-21 | 1993-09-15 | O·F·迪特里希 | Purification contains the method and the device thereof of gas, waste gas steam and the salt solution of undesirable chemical substance |
| CN1167813A (en) * | 1996-06-06 | 1997-12-17 | 陈绍维 | Engineering and apparatus for purifying and regenerating coal gas by active carbon desulfurization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1202387A (en) | 1998-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2006522588A (en) | Self-contained streamline methane and / or high purity hydrogen generation system | |
| DK2906666T3 (en) | METHOD AND APPARATUS FOR MANUFACTURING A METHANEOUS COMPENSATION FOR NATURAL GAS | |
| CN113213425A (en) | System and method for preparing hydrogen by using natural gas | |
| CN101955153A (en) | Process for converting high-concentration CO-tolerant sulfur | |
| ES2688459T3 (en) | Procedure to provide a mixture of gases that can be fed to a gas network and installation suitable for it | |
| KR960034073A (en) | Nitrogen production method and plant for heat treatment | |
| CN1057477C (en) | Steam purifying method and apparatus for change-over system of synthetic ammonia plant | |
| CN101225328A (en) | Device and method for producing half-water gas by employing oxygen-enriched air | |
| CN1114583C (en) | Manufacture method for methanol by use of raw coal | |
| CN205973827U (en) | Gas system is produced to synthetic ammonia steam | |
| Nindhia et al. | Method on conversion of gasoline to biogas fueled single cylinder of four stroke engine of electric generator | |
| CA1161357A (en) | Apparatus for regenerating absorbent and method of operating the apparatus | |
| CN101700890A (en) | Ammonia purification method | |
| CN209854029U (en) | Device for preparing methanol from synthesis gas without conversion system | |
| CN109385313A (en) | A kind of raw gas washing process | |
| JP2002121571A (en) | System for gasifying biomass | |
| CN207287139U (en) | Constant temperature catalyzing reaction unit for purifying low-concentration volatile organic matter | |
| CN100415346C (en) | Method for purifying carbonyl gas through methanol in low temperature | |
| CN103449364B (en) | A kind of process for converting high-concentration CO-tolerant sulfur and device making full use of reaction heat | |
| CN204058302U (en) | A kind of coke(oven)gas assists the system of gasification methyl alcohol | |
| CN205556427U (en) | Professional equipment of recovery of natural pond liquid ammonia nitrogen and marsh gas purification technology behind pig manure anaerobic fermentation | |
| CN1253846A (en) | Gas separation equipment and application of gas produced by said equipment | |
| CA1077718A (en) | Process of producing a fuel gas by the catalytic reaction of methanol and water vapor | |
| JPS6241701A (en) | Pressure swing type gas separator in methanol decomposition apparatus | |
| CN204824171U (en) | Automatic hydrogenation purification device of nitrogen gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUASHUO SCIENCE CO., LTD. Free format text: FORMER NAME: HUBEI PROV. CHEMICAL RESEARCH INST. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: No. 30 Guan Shan Road, Wuhan, Hubei, Wuchang Patentee after: Huashuo Technology Co., Ltd. Address before: No. 30 Guan Shan Road, Wuhan, Hubei, Wuchang Patentee before: Hubei Research Institute of Chemistry |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Steam purifying method and apparatus for change-over system of synthetic ammonia plant Effective date of registration: 20100907 Granted publication date: 20001018 Pledgee: Bank of Hankou, Limited by Share Ltd, Optics Valley branch Pledgor: Huashuo Technology Co., Ltd. Registration number: 2010990000869 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20151106 Granted publication date: 20001018 Pledgee: Bank of Hankou Limited by Share Ltd Optics Valley branch Pledgor: Huashuo Technology Co., Ltd. Registration number: 2010990000869 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PM01 | Change of the registration of the contract for pledge of patent right |
Change date: 20151106 Registration number: 2010990000869 Pledgee after: Bank of Hankou Limited by Share Ltd Optics Valley branch Pledgee before: Bank of Hankou, Limited by Share Ltd, Optics Valley branch |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20001018 |