CN203728745U - Control system for inlet temperature of circulating water in urea device desorbing reflux condenser - Google Patents
Control system for inlet temperature of circulating water in urea device desorbing reflux condenser Download PDFInfo
- Publication number
- CN203728745U CN203728745U CN201420044284.XU CN201420044284U CN203728745U CN 203728745 U CN203728745 U CN 203728745U CN 201420044284 U CN201420044284 U CN 201420044284U CN 203728745 U CN203728745 U CN 203728745U
- Authority
- CN
- China
- Prior art keywords
- steam
- temperature
- circulating water
- reflux condenser
- reflux exchanger
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000010992 reflux Methods 0.000 title claims abstract description 32
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000004202 carbamide Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 abstract description 10
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 7
- 238000003795 desorption Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- Control Of Temperature (AREA)
Abstract
The utility model discloses a control system for the inlet temperature of circulating water in a urea device desorbing reflux condenser. The control system comprises a reflux condenser, wherein the reflux condenser is provided with a circulating water inlet and is connected with a circulating water inlet pipeline; a steam-water mixer is installed on the circulating water inlet pipeline; a steam pipeline is connected at a steam inlet of the steam-water mixer; a temperature regulating valve is installed on the steam pipeline; a thermometer is installed in front of an outlet of the steam-water mixer on the circulating water inlet pipeline and is electrically connected with the temperature regulating valve via a temperature transmitter and a temperature controller in sequence. The control system has a compact structure and can control the temperature of the circulating water entering the reflux condenser safely, simply and effectively by regulating the flow of the steam entering the steam-water mixer, thus avoiding crystallization of process materials in the reflux condenser and improving the safety and operability of the urea device.
Description
Technical field
The utility model relates to urea plant desorption technique field, specifically a kind of Controlling System of urea plant desorb reflux exchanger recirculated water inflow temperature.
Background technology
In urea plant desorption and hydrolysis system, the process gas that goes out Analytic Tower mainly contains NH
3, CO
2, H
2o.This burst of process gas enters reflux exchanger condensation from Analytic Tower, and condensed process condensate participates in circulation after sending into low pressure carbamate condenser by transferpump.In reflux exchanger, the Tc of process condensate is about 20 DEG C, should not be lower than 26 DEG C for the circulating water temperature of process for cooling gas.In the northern area of China, when operate winter, the temperature of recirculated water, usually lower than 20 DEG C, easily causes process condensate crystallization in reflux exchanger, causes the desorb hydrolysis cannot normal running, and the safety of urea plant and normal production are affected greatly.
Utility model content
The purpose of this utility model is to provide a kind of Controlling System of urea plant desorb reflux exchanger recirculated water inflow temperature, can enter by adjusting the steam flow of steam heater, come safety, simple, effectively control the circulating water temperature that enters reflux exchanger, non-crystallizable to ensure to enter the process stream of reflux exchanger.
The technical solution of the utility model is as follows:
A kind of Controlling System of urea plant desorb reflux exchanger recirculated water inflow temperature, include reflux exchanger, described reflux exchanger is provided with recirculated water water-in and is connected with circulating water inlet road, it is characterized in that: on described circulating water inlet road, steam heater is installed, the steam inlet of described steam heater is connected with steam-pipe, on described steam-pipe, temperature control valve (TCV) is installed, the front of the inherent steam heater outlet in described circulating water inlet road is provided with thermometer, described thermometer is electrically connected with temperature control valve (TCV) by temperature transmitter and temperature regulator successively.
The Controlling System of described urea plant desorb reflux exchanger recirculated water inflow temperature, is characterized in that: between described circulating water inlet road, steam-pipe and steam heater, adopt respectively flange to be connected.
The Controlling System of described urea plant desorb reflux exchanger recirculated water inflow temperature, is characterized in that: between described temperature control valve (TCV) and steam-pipe, adopt flange to be connected.
The beneficial effects of the utility model:
The utility model compact construction, when the circulating water temperature (temperature regulator instruction) that enters reflux exchanger is during lower than 26 DEG C, temperature control valve (TCV) is opened automatically, fill into steam to steam heater, more than improving the circulating water temperature to 26 DEG C that enters reflux exchanger, the aperture size of temperature control valve (TCV) is regulated automatically by temperature regulator, enter the steam flow of steam heater by adjusting, can safety, simply, effectively control the circulating water temperature that enters reflux exchanger, avoid process stream crystallization in reflux exchanger, security and the operability of urea plant are improved.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Embodiment
Referring to Fig. 1, a kind of Controlling System of urea plant desorb reflux exchanger recirculated water inflow temperature, include reflux exchanger 7, reflux exchanger 7 is provided with recirculated water water-in and is connected with circulating water inlet road 1, steam heater 4 is installed on circulating water inlet road 1, the steam inlet of steam heater 4 is connected with steam-pipe 2, temperature control valve (TCV) 3 is installed on steam-pipe 2, the front that the inherent steam heater 4 in circulating water inlet road 1 exports is provided with thermometer, and thermometer is electrically connected with temperature control valve (TCV) 3 by temperature transmitter 5 and temperature regulator 6 successively.
In the utility model, between circulating water inlet road 1, steam-pipe 2 and steam heater 4, adopt respectively flange to be connected; Between temperature control valve (TCV) 3 and steam-pipe 2, adopt flange to be connected.
Below in conjunction with accompanying drawing, the utility model is further described:
Enter steam heater 4 for the recirculated water of desorb reflux exchanger 7, steam enters from the steam inlet of steam heater 4, and recirculated water and steam fully mix steam heater 4 is interior, and temperature gets a promotion and from steam heater 4 outlet outflows.The temperature that goes out steam heater 4 is sent temperature signal into DCS demonstration by thermometer measure and by temperature transmitter 5, and the aperture of temperature control valve (TCV) 3 is controlled by temperature regulator 6.In the time going out the temperature of steam heater 4 and spend lower than 26, the signal that temperature control valve (TCV) 3 is sent here according to temperature regulator 6 is opened certain aperture, the steam of corresponding discharge enters steam heater 4 by steam-pipe 2, and the circulating water temperature that goes out steam heater 4 is controlled at 26 DEG C.When the temperature that goes out steam heater 4 is during higher than 26 DEG C, temperature control valve (TCV) 3 apertures are 0, and steam does not enter steam heater 4, and the temperature that goes out accordingly steam heater 4 is the initial temperature of recirculated water.
Claims (3)
1. the Controlling System of a urea plant desorb reflux exchanger recirculated water inflow temperature, include reflux exchanger, described reflux exchanger is provided with recirculated water water-in and is connected with circulating water inlet road, it is characterized in that: on described circulating water inlet road, steam heater is installed, the steam inlet of described steam heater is connected with steam-pipe, on described steam-pipe, temperature control valve (TCV) is installed, the front of the inherent steam heater outlet in described circulating water inlet road is provided with thermometer, described thermometer is electrically connected with temperature control valve (TCV) by temperature transmitter and temperature regulator successively.
2. the Controlling System of urea plant desorb reflux exchanger recirculated water inflow temperature according to claim 1, is characterized in that: between described circulating water inlet road, steam-pipe and steam heater, adopt respectively flange to be connected.
3. the Controlling System of urea plant desorb reflux exchanger recirculated water inflow temperature according to claim 1, is characterized in that: between described temperature control valve (TCV) and steam-pipe, adopt flange to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420044284.XU CN203728745U (en) | 2014-01-23 | 2014-01-23 | Control system for inlet temperature of circulating water in urea device desorbing reflux condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420044284.XU CN203728745U (en) | 2014-01-23 | 2014-01-23 | Control system for inlet temperature of circulating water in urea device desorbing reflux condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203728745U true CN203728745U (en) | 2014-07-23 |
Family
ID=51198831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420044284.XU Expired - Lifetime CN203728745U (en) | 2014-01-23 | 2014-01-23 | Control system for inlet temperature of circulating water in urea device desorbing reflux condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203728745U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115193085A (en) * | 2022-06-24 | 2022-10-18 | 苏州金宏气体股份有限公司 | System and method for controlling tower top pressure and temperature of rectifying tower for producing tetraethoxysilane |
-
2014
- 2014-01-23 CN CN201420044284.XU patent/CN203728745U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115193085A (en) * | 2022-06-24 | 2022-10-18 | 苏州金宏气体股份有限公司 | System and method for controlling tower top pressure and temperature of rectifying tower for producing tetraethoxysilane |
| CN115193085B (en) * | 2022-06-24 | 2024-04-12 | 金宏气体股份有限公司 | Overhead pressure and temperature control system and method for rectifying tower for producing ethyl orthosilicate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
|
| CX01 | Expiry of patent term |