CN202440305U - Hot nitrogen replacement system suitable for CO conversion device - Google Patents
Hot nitrogen replacement system suitable for CO conversion device Download PDFInfo
- Publication number
- CN202440305U CN202440305U CN 201120467387 CN201120467387U CN202440305U CN 202440305 U CN202440305 U CN 202440305U CN 201120467387 CN201120467387 CN 201120467387 CN 201120467387 U CN201120467387 U CN 201120467387U CN 202440305 U CN202440305 U CN 202440305U
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- nitrogen
- pipeline
- changing device
- hot
- conversion device
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Abstract
The utility model discloses a hot nitrogen substitution system suitable for a CO conversion device, which comprises the CO conversion device, the CO conversion device is connected with a nitrogen heating furnace through a pipeline, and a pre-conversion heat exchanger is arranged between the nitrogen heating furnace and the CO conversion device; and the nitrogen heating furnace is connected with an inlet of a shell side of the pre-conversion heat exchanger through a pipeline, an outlet of the shell side of the pre-conversion heat exchanger is connected with the inlet of the CO conversion device through a pipeline, the outlet of the CO conversion device is connected with the inlet of a tube pass of the pre-conversion heat exchanger, and the outlet of the tube pass of the pre-conversion heat exchanger is connected with a blowdown piping. By utilizing the pipeline, the hot nitrogen is introduced into the conversion device for replacement, so that the hot saturated steam is prevented from contacting the cool nitrogen to destroy the contact agent by condensation, the service life of the contact agent is prolonged, meanwhile the furnace temperature is prevented from lowering too low due to replacement by the cool nitrogen in pause, the trouble of extending power-on time is eliminated, and equipment is also protected.
Description
Technical field
The utility model relates to a kind of hot nitrogen exchange system of the CO of being applicable to changing device.
Background technology
In the CO conversion process,, preventing the water steam, thereby influence the use of transformation catalyst in intrasystem condensation because water vapour as the existence of reaction medium, in the time of need stopping in system, all need carry out the N2 displacement.But because cold nitrogen replacement is all adopted in the N2 displacement, on the one hand, because cold N2 temperature is a normal temperature all generally, and transformation system all is a high temperature; The entering of cold N2 also can cause the aggravation of water vapor condensation phenomenon, though, finally can water vapour be displaced system; But condensation can't be avoided, on the other hand, and when carrying out nitrogen replacement; Must there be an interim time nitrogen replacement time, when adopting cold nitrogen replacement, owing to need the regular hour; The transformation system temperature descends very fast, so since, also can prolong the follow-up driving time.And adopt the hot nitrogen displacement, can fundamentally address the above problem.
Summary of the invention
To the problem that exists in the above-mentioned prior art, the utility model provides a kind of hot nitrogen exchange system of the CO of being applicable to changing device, through hot nitrogen displacement, thereby has reduced the condensation of hot saturation steam, reaches the protection catalyst, reduces the purpose in driving cycle.
The hot nitrogen exchange system that is applicable to the CO changing device of the utility model comprises the CO changing device, and said CO changing device is connected to the nitrogen process furnace through pipeline, between nitrogen process furnace and CO changing device, is provided with preparatory change interchanger; Said nitrogen process furnace is connected to the import of preparatory change heat exchanger shell pass through pipeline; The outlet that becomes heat exchanger shell pass in advance is connected to the inlet of CO changing device through pipeline; The outlet of CO changing device is connected to the import of the hot organ pipe journey of preparatory conversion, and the outlet of the hot organ pipe journey of conversion connects blowdown piping in advance.
Said nitrogen process furnace and the pipeline that becomes between the interchanger in advance are provided with measurement and control of temperature point, blow-down pipe and pressure testing and controlling point.
The export pipeline of the hot organ pipe journey of said preparatory conversion is provided with heat reclaim unit.
The beneficial effect of type of the present invention: through pipeline; Hot nitrogen is introduced changing device replaces; Avoid hot saturation steam to contact cold nitrogen condensation and destroyed catalyst; It is low that avoided cold nitrogen replacement of short stopping time that furnace temperature was reduced to the work-ing life that has prolonged catalyst simultaneously, prolongs the trouble of driving time, also protected equipment.
Description of drawings
Accompanying drawing 1 is the apparatus system synoptic diagram of the utility model.
Among the figure: 1, nitrogen process furnace; 2, become interchanger in advance; 3, CO changing device; 4, heat reclaim unit; 5, self-adjusting valve one; 6, self-adjusting valve two; 7, self-adjusting valve three; 8, self-adjusting valve four; 9, manual valve.
Embodiment
As shown in the figure, the hot nitrogen exchange system that is applicable to the CO changing device of the utility model comprises CO changing device 3, and CO changing device 3 is connected to nitrogen process furnace 1 through pipeline, between nitrogen process furnace 1 and CO changing device 3, is provided with preparatory change interchanger 2; Nitrogen process furnace 1 is connected to the import of preparatory change interchanger 2 shell sides through pipeline; The outlet that becomes interchanger 2 shell sides in advance is connected to the inlet of CO changing device 3 through pipeline; The outlet of CO changing device 3 is connected to the import of preparatory change interchanger 2 tube sides, and the outlet that becomes interchanger 2 tube sides in advance connects blowdown piping; Simultaneously, on nitrogen process furnace 1 and the preparatory pipeline that becomes between the interchanger 2, be provided with measurement and control of temperature point T, blow-down pipe and pressure testing and controlling point P; Also be provided with heat reclaim unit 4 on the export pipeline of change interchanger 2 tube sides in advance, be used for preheating and reclaim.
The utility model feeds changing device again and replaces after utilizing pipeline that cold nitrogen is introduced the intensification of nitrogen process furnace.Concrete steps are following: a), some nitrogen process furnace 1; B), open self-adjusting valve 1, heat up because of cold nitrogen gets into nitrogen process furnace 1 tube side, the qualified nitrogen that do not heat up is through self-adjusting valve 26 emptying; C), confirm that manual valve 9 cuts out, wait for that point for measuring temperature T temperature rises to 240 ℃, slowly close self-adjusting valve 26, pressure rises to greater than changing device 3 system pressures, opens the self-adjusting valve three-way system and introduces hot nitrogen and replace; D), close self-adjusting valve two, nitrogen is via changing device 3, heat reclaim unit 4 is at last in self-adjusting valve four emptying; E), the displacement finish after, close self-adjusting valve one, two, three, four, stop the nitrogen process furnace.The utility model passes through pipeline; Hot nitrogen is introduced changing device replaces; Avoid hot saturation steam to contact cold nitrogen condensation and destroyed catalyst; It is low that avoided cold nitrogen replacement of short stopping time that furnace temperature was reduced to the work-ing life that has prolonged catalyst simultaneously, prolongs the trouble of driving time, also protected equipment.
Claims (3)
1. a hot nitrogen exchange system that is applicable to the CO changing device comprises the CO changing device, it is characterized in that: said CO changing device is connected to the nitrogen process furnace through pipeline, between nitrogen process furnace and CO changing device, is provided with preparatory change interchanger; Said nitrogen process furnace is connected to the import of preparatory change heat exchanger shell pass through pipeline; The outlet that becomes heat exchanger shell pass in advance is connected to the inlet of CO changing device through pipeline; The outlet of CO changing device is connected to the import of the hot organ pipe journey of preparatory conversion, and the outlet of the hot organ pipe journey of conversion connects blowdown piping in advance.
2. the hot nitrogen exchange system that is applicable to the CO changing device as claimed in claim 1 is characterized in that: said nitrogen process furnace and the pipeline that becomes between the interchanger in advance are provided with measurement and control of temperature point, blow-down pipe and pressure testing and controlling point.
3. the hot nitrogen exchange system that is applicable to the CO changing device as claimed in claim 1 is characterized in that: the export pipeline of the hot organ pipe journey of said preparatory conversion is provided with heat reclaim unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120467387 CN202440305U (en) | 2011-11-23 | 2011-11-23 | Hot nitrogen replacement system suitable for CO conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120467387 CN202440305U (en) | 2011-11-23 | 2011-11-23 | Hot nitrogen replacement system suitable for CO conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202440305U true CN202440305U (en) | 2012-09-19 |
Family
ID=46821759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120467387 Withdrawn - After Issue CN202440305U (en) | 2011-11-23 | 2011-11-23 | Hot nitrogen replacement system suitable for CO conversion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202440305U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502493A (en) * | 2011-11-23 | 2012-06-20 | 安徽淮化股份有限公司 | Hot nitrogen gas replacement system suitable for CO conversion device |
| CN104555918A (en) * | 2014-12-31 | 2015-04-29 | 贵州天福化工有限责任公司 | Method and system for recycling high-temperature steam |
-
2011
- 2011-11-23 CN CN 201120467387 patent/CN202440305U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502493A (en) * | 2011-11-23 | 2012-06-20 | 安徽淮化股份有限公司 | Hot nitrogen gas replacement system suitable for CO conversion device |
| CN104555918A (en) * | 2014-12-31 | 2015-04-29 | 贵州天福化工有限责任公司 | Method and system for recycling high-temperature steam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120919 Effective date of abandoning: 20130605 |
|
| RGAV | Abandon patent right to avoid regrant |