CN104043332A - Multi-tower series-connected circulating amine solution regenerating device - Google Patents
Multi-tower series-connected circulating amine solution regenerating device Download PDFInfo
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- CN104043332A CN104043332A CN201410320175.0A CN201410320175A CN104043332A CN 104043332 A CN104043332 A CN 104043332A CN 201410320175 A CN201410320175 A CN 201410320175A CN 104043332 A CN104043332 A CN 104043332A
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Abstract
The invention relates to equipment for purifying gas by using an alcohol amine solution, and in particular relates to a multi-tower series-connected circulating amine solution regenerating device. The multi-tower series-connected circulating amine solution regenerating device is characterized by comprising a regenerating tower group which is formed by connecting at least two regenerating towers together, and a rich-poor solution heat exchanger (1), wherein an amine-rich solution inlet, an amine-rich solution outlet, an amine-poor solution outlet and an amine-poor solution inlet are formed in the rich-poor solution heat exchanger (1) respectively; the amine-rich solution outlet is communicated with an amine solution inlet in the top of the first regenerating tower in the regenerating tower group through a pipeline; the amine-poor solution inlet is communicated with an amine solution outlet in the bottom of the last regenerating tower in the regenerating tower group through a pipeline. According to the device, a multi-tower series-connected structure is adopted, so that the heights of the regenerating towers are effectively reduced, and requirements for mounting the regenerating towers are effectively reduced. The device is structurally integral, and modular; conditions are provided for implementation of the miniaturization and blocking of the device; the device is simple in process, and the number of equipment is small; acidic gas in an amine solution is thoroughly analyzed; the amine solution is stable in circulation, and the device can work under the normal pressure.
Description
Technical field
The present invention relates to use alkanolamine solution to carry out the equipment of gas purification, especially a kind of multitower connection in series-parallel circulation amine absorption device.
Background technology
The sour gas (hydrogen sulfide, carbon dioxide etc.) that at present contains inequality in the industrial tail gas such as natural gas, refinery gas, synthesis gas, coal gas and synthetic ammonia needs to remove the gas that these have no value for use in actual production.The method that industrial common employing alkanolamine solution circular regeneration is used purifies this class gas, gas by and solution between mass transfer and react sour gas be absorbed in solution with solution, and carry into the regenerative system of solution the sour gas absorbing in solution is parsed and emitted, thereby realize regeneration and the cycling and reutilization of solution.
The regeneration of general amine liquid is all to carry out in regenerator, and by amine liquid, heating parses sour gas, and regenerator is conventionally highly higher, and general installation needs Assembling, is unfavorable for carrying out miniaturization, operation fast.Particularly follow the development of liquefied natural gas industry in recent years, the small-sized sources of the gas such as various associated gas, little gas well, outlying gas well, because its reserves are scattered, cost of winning is higher, because the pipeline transportation cost of long distance is higher, production scale is uneconomical, and the scattered gas field of China and outlying gas field natural gas can not get exploitation for a long time for this reason.Therefore, develop economically outlying district natural gas resource and become China's natural gas industry problem anxious to be resolved.So, according to the tolerance of natural gas resource, temperament characteristics, adopt little, the small investment for the treatment of capacity and large miniaturization, the skid local use technology of operating flexibility, little gas well is carried out to rolling development by the main flow that becomes small-sized gas field scavenging solution gasifying device and will become stingy source and produce equipment.In order to realize miniaturization, the skid of equipment, to amine liquid, the improvement of multitower series circulation regeneration is carried out in regeneration, has great importance.
Summary of the invention
The object of this invention is to provide a kind of multitower series circulation amine liquid regenerating unit, can effectively lower the height of regenerator and installation requirement and provide condition for miniaturization, the sled blocking of implement device.
A kind of multitower series circulation amine liquid regenerating unit, its special feature is: comprise the regenerator group being made up of at least two regenerators being cascaded, also comprise poor rich liquid heat exchanger, on this poor rich liquid heat exchanger, be respectively equipped with that rich amine liquid enters, outlet and poor amine liquid entry and exit, wherein rich amine liquid outlet is communicated with the regenerator top amine liquid import making number one in aforementioned regenerator group by pipeline, and poor amine liquid entrance is communicated with the regenerator bottom amine liquid outlet rolling into last place in aforementioned regenerator group by pipeline; The regenerator top gas vent wherein making number one in aforementioned regenerator group is communicated with the import of cooler by pipeline, the outlet of this cooler is communicated with the import of discharge gas gas-liquid separator by pipeline, and the condensate outlet of this discharge gas gas-liquid separator is also communicated with the regenerator bottom pump inlet duct making number one in aforementioned regenerator group by pipeline; Wherein also comprise heater, the amine liquid import of this heater is communicated with the regenerator bottom amine liquid heating outlet rolling into last place in aforementioned regenerator group, and the amine liquid steam (vapor) outlet of this heater is communicated with the regenerator central gas import rolling into last place in aforementioned regenerator group.
Wherein on the other pipeline of the condensate outlet of discharge gas gas-liquid separator, condensate liquid return valve is installed, and is provided with sour gas outlet at the condensate liquid top of this discharge gas gas-liquid separator.
Wherein regenerator group comprises the first regenerator being cascaded, the second regenerator and the 3rd regenerator, pipeline communication is passed through in the central gas import of this first regenerator and the outlet of the top gas of the second regenerator, and pipeline communication is passed through in the outlet of the top gas of the central gas import of the second regenerator and the 3rd regenerator, and the bottom amine liquid outlet of the first regenerator is connected pump with the top amine liquid import of the second regenerator by pipeline and regenerator and is communicated with, and the bottom amine liquid outlet of the second regenerator is also connected pump connection by pipeline and regenerator with the top amine liquid import of the 3rd regenerator.
The beneficial effect of apparatus of the present invention is mainly reflected in: device adopts the structure of multitower series connection, has effectively lowered height and the installation requirement of regenerator; The structure assembly of device, modularization, for miniaturization, the sled blocking of implement device provide condition; Device technique is simple, and number of devices is few; In amine liquid, sour gas is resolved thoroughly; Amine liquid stable circulation, and can realize normal pressure work.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1, the present invention is a kind of multitower series circulation amine liquid regenerating unit, comprise the regenerator group being formed by least two regenerators being cascaded, also comprise poor rich liquid heat exchanger 1, on this poor rich liquid heat exchanger 1, be respectively equipped with that rich amine liquid enters, outlet and poor amine liquid entry and exit, wherein rich amine liquid outlet is communicated with the regenerator top amine liquid import making number one in aforementioned regenerator group by pipeline, and poor amine liquid entrance is communicated with the regenerator bottom amine liquid outlet rolling into last place in aforementioned regenerator group by pipeline; The regenerator top gas vent wherein making number one in aforementioned regenerator group is communicated with the import of cooler 8 by pipeline, the outlet of this cooler 8 is communicated with the import of discharge gas gas-liquid separator 9 by pipeline, and the condensate outlet of this discharge gas gas-liquid separator 9 is also connected pump inlet pipeline communication by pipeline with the regenerator bottom regenerator making number one in aforementioned regenerator group; Wherein also comprise heater 7, the amine liquid import of this heater 7 is communicated with the regenerator bottom amine liquid heating outlet rolling into last place in aforementioned regenerator group, and the amine liquid steam (vapor) outlet of this heater 7 is communicated with the regenerator central gas import rolling into last place in aforementioned regenerator group.
Wherein on the other pipeline of the condensate outlet of discharge gas gas-liquid separator 9, condensate liquid return valve 10 is installed, and is provided with sour gas outlet at the condensate liquid top of this discharge gas gas-liquid separator 9.
Wherein regenerator group comprises the first regenerator 2 being cascaded, the second regenerator 3 and the 3rd regenerator 4, pipeline communication is passed through in the top gas outlet of the central gas import of this first regenerator 2 and the second regenerator 3, and pipeline communication is passed through in the outlet of the top gas of the central gas import of the second regenerator 3 and the 3rd regenerator 4, and the bottom amine liquid outlet of the first regenerator 2 is connected pump with the top amine liquid entrance of the second regenerator 3 by pipeline and regenerator and is communicated with, and the bottom amine liquid outlet of the second regenerator 3 is also connected pump connection by pipeline and regenerator with the top amine liquid entrance of the 3rd regenerator 4.
The amine liquid renovation process that uses apparatus of the present invention to carry out comprises the following steps:
Rich amine liquid (having absorbed the amine liquid of sour gas) enters successively the first regenerator 2, the second regenerator 3 and the 3rd regenerator 4 of series connection after poor rich liquid heat exchanger 1 preheating from tower top, the amine liquid steam being heated through heater 7 by the 3rd regenerator 4 bottoms is from the bottom access in sequential series of the 3rd regenerator 4, the second regenerator 3 and the first regenerator 2, conduct heat with the rich amine liquid formation countercurrent mass transfer from top of tower access, thereby progressively heat rich amine liquid, and parse sour gas.Discharged by the 3rd regenerator 4 bottoms through the poor amine liquid (thering is higher temperature) of resolving in regenerator, after poor rich liquid heat exchanger 1 and the energy-conservation heat exchange of rich amine liquid, go to subsequent processing and absorb sour gas.
Amine liquid is drawn by heater 7 and is heated into steam in the 3rd regenerator 4 bottom, and steam imports the middle part of the 3rd regenerator 4 again by pipeline, and vapor stream rises and heats the amine liquid flowing down from regeneration overhead, carries away the sour gas parsing after heating simultaneously; Steam flow the 3rd regenerator 4 tops, imported the middle part of the second regenerator 3 by pipeline by pressure differential, the amine liquid of the second regenerator 3 is proceeded to the process of heating and parsing sour gas, analogized by inferior, the most finally the overhead vapor of the first regenerator 2 is carried sour gas and is discharged Tower System, via cooler 8, water and amine liquid steam-condensation are reduced to liquid and deliver to discharge gas gas-liquid separator 9, sour gas is discharged by discharging gas gas-liquid separator 9 tops, and condensate liquid is refluxed by its bottom.
Embodiment 1:
In this example, describe as example taking three tower cascade connected.
Accompanying drawing 1 is structural representation of the present invention, as shown in Figure 1, it compared with prior art, the main distinction is: the regenerator of use has directly reduced height by the mode of series connection, the tower that must install to production scene before making, realize direct skid, arrived i.e. use, saved step and the trouble of installing.In addition also have following key point: what poor rich liquid heat exchanger 1 used lean solution gives heat to rich solution preheating, simultaneously also cooling self, more energy-conservation; Cooler 8 and discharge gas gas-liquid separator 9, make steam condensing, thereby reclaim, and reduced supplementing of amine liquid liquid, conservation.
By said apparatus, realize the recycling utilization of amine liquid, detailed process is as follows:
1, the rich amine liquid amine liquid that has absorbed sour gas passes into the first regenerator 2 by top after poor rich liquid heat exchanger 1 preheating, in the first regenerator 2 fully with the heat exchange of steam mass transfer, amass in the first regenerator 2 bottoms through the amine liquid of once intensification;
2, the amine liquid through once heating up in the first regenerator 2, connects pump by regenerator and injects from the second regenerator 3 tops, in the second regenerator 3, continues mass transfer heat exchange with steam, is taken away the sour gas of separating out, and further heat amine liquid by up steam; And amine liquid continuation above-mentioned steps enters the 3rd regenerator 4 tops, the process of repeated resolution and heating via regenerator connection infusion;
3, the heat of whole regenerator is provided by heater 7, heater 7 is connected with the 3rd regenerator 4 liquid phases, liquid phase amine liquid is added to thermosetting steam, steam is passed into by the 3rd regenerator 4 filler bottoms, up in tower, heating is by the descending amine liquid of tower top and take away the sour gas that rich amine liquation goes out, then access the second regenerator 3 packing section from the 3rd regenerator 4 tops by pipeline, continue up heating amine liquid and take away the sour gas that amine liquation goes out, accessed under the first regenerator 2 packing section by pipeline again, continue up heating amine liquid and take away the sour gas that amine liquation goes out, last steam and the sour gas of separating out are picked out by the first regenerator 2 top ducts, water vapor condensation after after subcooler 8 cools, in discharge gas gas-liquid separator 9, realize gas-liquid separation, lime set is by 10 times systemic circulation utilizations of condensate liquid return valve, the sour gas of taking out of is in the 9 top discharges of discharge gas gas-liquid separator,
4, the amine liquid that regenerator bottom stockpiles is the poor amine liquid of having separated out sour gas, picks out system after access poor rich liquid heat exchanger 1 and the heat exchange of rich amine liquid by pipeline, goes to absorption sour gas.
Claims (3)
1. a multitower series circulation amine liquid regenerating unit, it is characterized in that: comprise the regenerator group being formed by least two regenerators being cascaded, also comprise poor rich liquid heat exchanger (1), on this poor rich liquid heat exchanger (1), be respectively equipped with that rich amine liquid enters, outlet and poor amine liquid entry and exit, wherein rich amine liquid outlet is communicated with the regenerator top amine liquid import making number one in aforementioned regenerator group by pipeline, and poor amine liquid entrance is communicated with the regenerator bottom amine liquid outlet rolling into last place in aforementioned regenerator group by pipeline; The regenerator top gas vent wherein making number one in aforementioned regenerator group is communicated with the import of cooler (8) by pipeline, the outlet of this cooler (8) is communicated with the import of discharge gas gas-liquid separator (9) by pipeline, and the condensate outlet of this discharge gas gas-liquid separator (9) is also communicated with the regenerator bottom pump inlet duct making number one in aforementioned regenerator group by pipeline; Wherein also comprise heater (7), the amine liquid import of this heater (7) is communicated with the regenerator bottom amine liquid heating outlet rolling into last place in aforementioned regenerator group, and the amine liquid steam (vapor) outlet of this heater (7) is communicated with the regenerator central gas import rolling into last place in aforementioned regenerator group.
2. multitower series circulation amine liquid regenerating unit as claimed in claim 1, it is characterized in that: wherein on the other pipeline of the condensate outlet of discharge gas gas-liquid separator (9), condensate liquid return valve (10) is installed, and is provided with sour gas outlet at the condensate liquid top of this discharge gas gas-liquid separator (9).
3. multitower series circulation amine liquid regenerating unit as claimed in claim 1 or 2, it is characterized in that: wherein regenerator group comprises the first regenerator (2) being cascaded, the second regenerator (3) and the 3rd regenerator (4), pipeline communication is passed through in the top gas outlet of the central gas import of this first regenerator (2) and the second regenerator (3), and pipeline communication is passed through in the outlet of the top gas of the central gas import of the second regenerator (3) and the 3rd regenerator (4), and the bottom amine liquid outlet of the first regenerator (2) is connected pump with the top amine liquid import of the second regenerator (3) by pipeline and regenerator and is communicated with, and the bottom amine liquid outlet of the second regenerator (3) is also connected pump connection by pipeline and regenerator with the top amine liquid import of the 3rd regenerator (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410320175.0A CN104043332A (en) | 2014-07-07 | 2014-07-07 | Multi-tower series-connected circulating amine solution regenerating device |
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| CN201410320175.0A CN104043332A (en) | 2014-07-07 | 2014-07-07 | Multi-tower series-connected circulating amine solution regenerating device |
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| CN104043332A true CN104043332A (en) | 2014-09-17 |
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| CN201410320175.0A Pending CN104043332A (en) | 2014-07-07 | 2014-07-07 | Multi-tower series-connected circulating amine solution regenerating device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104474862A (en) * | 2014-11-13 | 2015-04-01 | 中国石油化工股份有限公司 | Skid-mounted desulfurized tail gas purifying oxidation absorption liquid recycling apparatus |
| CN112391210A (en) * | 2020-11-17 | 2021-02-23 | 滨州中科催化技术有限公司 | Coke oven gas purification system |
| CN112432517A (en) * | 2020-10-28 | 2021-03-02 | 中石化宁波工程有限公司 | Lean-rich methanol heat exchange system and heat exchange method |
| CN114191833A (en) * | 2021-12-19 | 2022-03-18 | 山东清沂山石化科技有限公司 | Online steam tower salt washing system for amine liquid regeneration tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201138116Y (en) * | 2007-11-29 | 2008-10-22 | 武汉凯迪电力环保有限公司 | System for preparing food-grade carbon-dioxide by using power station smoke gas |
| CN103497802A (en) * | 2013-09-29 | 2014-01-08 | 银川天佳仪器仪表有限公司 | Device for removing acid gas in natural gas |
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2014
- 2014-07-07 CN CN201410320175.0A patent/CN104043332A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201138116Y (en) * | 2007-11-29 | 2008-10-22 | 武汉凯迪电力环保有限公司 | System for preparing food-grade carbon-dioxide by using power station smoke gas |
| CN103497802A (en) * | 2013-09-29 | 2014-01-08 | 银川天佳仪器仪表有限公司 | Device for removing acid gas in natural gas |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104474862A (en) * | 2014-11-13 | 2015-04-01 | 中国石油化工股份有限公司 | Skid-mounted desulfurized tail gas purifying oxidation absorption liquid recycling apparatus |
| CN112432517A (en) * | 2020-10-28 | 2021-03-02 | 中石化宁波工程有限公司 | Lean-rich methanol heat exchange system and heat exchange method |
| CN112432517B (en) * | 2020-10-28 | 2023-02-10 | 中石化宁波工程有限公司 | Lean-rich methanol heat exchange system and heat exchange method |
| CN112391210A (en) * | 2020-11-17 | 2021-02-23 | 滨州中科催化技术有限公司 | Coke oven gas purification system |
| CN114191833A (en) * | 2021-12-19 | 2022-03-18 | 山东清沂山石化科技有限公司 | Online steam tower salt washing system for amine liquid regeneration tower |
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Application publication date: 20140917 |
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