CN204022704U - Liquefied gas tripping device is saved steam consumption system - Google Patents
Liquefied gas tripping device is saved steam consumption system Download PDFInfo
- Publication number
- CN204022704U CN204022704U CN201420292152.9U CN201420292152U CN204022704U CN 204022704 U CN204022704 U CN 204022704U CN 201420292152 U CN201420292152 U CN 201420292152U CN 204022704 U CN204022704 U CN 204022704U
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- tank
- liquefied gas
- line
- depropanizing tower
- steam
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Abstract
The utility model relates to a kind of liquefied gas tripping device and saves steam consumption system.Mainly solve the high problem of the large cost of existing liquefied gas tripping device steam consumption existing in prior art.It is characterized in that: described liquefied gas head tank (1) tank bottom tube line is connected to depropanizing tower (2) middle part opening for feed, and depropanizing tower overhead line is connected to return tank (3) tank deck, is connected to pressure warning unit (4) in depropanizing tower overhead line; Return tank tank bottom tube line (5) is connected to depropanizing tower top; On return tank tank bottom tube line, be connected to reflux pump (6) and return flow meter (7), reflux pump (6) outlet connects a branch line (8) and goes to backflow tank deck, is connected to valve on branch line; At the bottom of depropanizing tower tower, be connected to reboiler (9), enter on the vapour line of reboiler and be connected to steam-flow meter.This liquefied gas tripping device is saved steam consumption system, can steam saving, cut down finished cost.
Description
Technical field
The utility model relates to petrochemical technology field, and particularly a kind of liquefied gas tripping device is saved steam consumption system.
Background technology
During petrochemical complex is produced, chemical plant installations will be separated into mixture liquefied gas propylene, propane, carbon four components conventionally, generally at the bottom of tower, uses steam as thermal source; tower top has liquid-phase reflux; gas-liquid two-phase is anti-phase contact in tower, realizes mass-and heat-transfer, the final object separating that realizes.Year treatment capacity is that the gas separation unit depropanizing tower steam mono-consumption of 22.4 ten thousand tons is 220.81kg/t, and the steam consumption of every day is 106 tons.Steam consumption is very large, because steam cost is higher, has caused very large waste; The condensing capacity producing is large, needs the pump of relatively high power to arrange outward, waste electric energy.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the high problem of the large cost of existing liquefied gas tripping device steam consumption existing in background technology, and provide a kind of liquefied gas tripping device to save steam consumption system, this liquefied gas tripping device is saved steam consumption system, can steam saving unit consumption, cut down finished cost.
The invention for solving the technical problem can reach by following technical solution: this liquefied gas tripping device is saved steam consumption system, comprise liquefied gas head tank, depropanizing tower, described liquefied gas head tank tank bottom tube line is connected to depropanizing tower middle part opening for feed, depropanizing tower overhead line is connected to return tank tank deck, in depropanizing tower overhead line, is connected to pressure warning unit; Return tank tank bottom tube line is connected to depropanizing tower top; On return tank tank bottom tube line, be connected to reflux pump and return flow meter, reflux pump outlet connects a branch line and goes to return tank tank deck, is connected to valve on branch line; At the bottom of depropanizing tower tower, be connected to reboiler, enter on the vapour line of reboiler and be connected to steam-flow meter.
The utility model is compared and can be had following beneficial effect with above-mentioned background technology: this liquefied gas tripping device is saved steam consumption system owing to adopting above-mentioned flow process, rationally adjust quantity of reflux, rationally utilize steam, a large amount of wastes of steam are avoided, carry out liquefied gas separation, ensure quality product, reduced the unit consumption of steam.At the bottom of depropanizing tower, steam mono-consumption, from original 220.81kg/t, drops to present 172.45kg/t, steam consumption 3180t monthly originally, and consumption 2483t monthly now, monthly saves 697 tons of steam, and actual annual benefit reaches more than 130 ten thousand yuan.
brief description of the drawings:
Accompanying drawing 1 is schematic flow sheet of the present utility model.
In figure: 1-liquefied gas head tank, 2-depropanizing tower, 3-return tank, 4-pressure warning unit, 5-tank bottom tube line, 6-reflux pump, 7-return flow meter, 8-branch line, 9-reboiler, 10-steam-flow meter.
embodiment:
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, this liquefied gas tripping device is saved steam consumption system, comprise liquefied gas head tank 1, depropanizing tower 2, described liquefied gas head tank 1 tank bottom tube line is connected to depropanizing tower 2 middle part opening for feeds, depropanizing tower 2 overhead line are connected to return tank 3 tank decks, in depropanizing tower 2 overhead line, are connected to pressure warning unit 4; Return tank 3 tank bottom tube lines 5 are connected to depropanizing tower 2 tops; On return tank 3 tank bottom tube lines, be connected to reflux pump 6 and return flow meter 7, reflux pump 6 outlets connect a branch line 8 and go to backflow tank deck, on branch line 8, are connected to valve; At the bottom of depropanizing tower tower, be connected to reboiler 9, enter on the vapour line of reboiler 9 and be connected to steam-flow meter 10; At the bottom of depropanizing tower tower, carbon four enters MTBE device.
This liquefied gas tripping device is saved steam consumption system, the in the situation that of monitoring overhead product quality, reducing gradually tower top pressure P(is to avoid occurring larger fluctuation, each pressure 0.02MPa that reduces), turn down gradually bottom steam amount according to sensitive plate temperature, pay close attention to bottom product quality simultaneously, and suitably reduce quantity of reflux.So repeatedly reduce tower top pressure, adjust bottom steam amount and quantity of reflux, until overhead product is off quality, tower operation is unstable, till difficult control of temperature, has also just found the flex point of each parameter control.Then determine accordingly optimum process condition.May cause pump discharge flow less reducing in quantity of reflux, the unsafe condition of pump underrun, so increased a line that removes return tank at pump discharge, adds a valve, guarantees pump smooth running.
Claims (1)
1. a liquefied gas tripping device is saved steam consumption system, comprise liquefied gas head tank (1), depropanizing tower (2), it is characterized in that: described liquefied gas head tank (1) tank bottom tube line is connected to depropanizing tower (2) middle part opening for feed, depropanizing tower (2) overhead line is connected to return tank (3) tank deck, in depropanizing tower (2) overhead line, is connected to pressure warning unit (4); Return tank (3) tank bottom tube line (5) is connected to depropanizing tower (2) top; On return tank (3) tank bottom tube line, be connected to reflux pump (6) and return flow meter (7), reflux pump (6) outlet connects a branch line (8) and goes to backflow tank deck, and branch line is connected to valve on (8); At the bottom of depropanizing tower tower, be connected to reboiler (9), enter on the vapour line of reboiler (9) and be connected to steam-flow meter (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420292152.9U CN204022704U (en) | 2014-06-04 | 2014-06-04 | Liquefied gas tripping device is saved steam consumption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420292152.9U CN204022704U (en) | 2014-06-04 | 2014-06-04 | Liquefied gas tripping device is saved steam consumption system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204022704U true CN204022704U (en) | 2014-12-17 |
Family
ID=52062596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420292152.9U Expired - Fee Related CN204022704U (en) | 2014-06-04 | 2014-06-04 | Liquefied gas tripping device is saved steam consumption system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204022704U (en) |
-
2014
- 2014-06-04 CN CN201420292152.9U patent/CN204022704U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20170604 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |