CN204509235U - A kind of high pressure molecular sieve circulatory dewatering system - Google Patents
A kind of high pressure molecular sieve circulatory dewatering system Download PDFInfo
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- CN204509235U CN204509235U CN201520215039.5U CN201520215039U CN204509235U CN 204509235 U CN204509235 U CN 204509235U CN 201520215039 U CN201520215039 U CN 201520215039U CN 204509235 U CN204509235 U CN 204509235U
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Abstract
The utility model discloses a kind of high pressure molecular sieve circulatory dewatering system, comprise molecular sieve water separation tower, compressor, wire gauzee filter, control gas blower, cyclonic separator, interchanger, surge tank.Knockout drum, combustion heating furnace, valve and corresponding Controlling System, before Sweet natural gas enters the dehydration of molecular sieve tower, first 25MP is forced into it, under high pressure operating mode, carry out dewatering operation, this operation is that a little equipment volume is little, the pressure-losses is little and is applicable to skid.Gas outlet arranges cyclonic separator to carry out gas solid separation to the Sweet natural gas being about to enter liquefaction stage and places the powder of molecular sieve and enter subordinate's liquefaction device occluding device and affect liquefaction efficiency.Whole flow process adopts closed cycle regenerative operation, and resurgent gases can recycle, and effectively can utilize the rear gas waste-heat of regeneration simultaneously, reduce energy consumption.
Description
Technical field
The utility model discloses a kind of dewatering processing device of natural gas liquids, particularly a kind of high-pressure natural gas molecular sieve dehydration system and method.
Background technology
Sweet natural gas after desulfurization is mainly carried out processed by natural gas liquids dehydration technique technique, the adsorption of zeolite-water is utilized to carry out dehydration operation, the method that adsorption cycle terminates rear heating carries out regenerative operation to molecular sieve, molecular sieve dehydration technique adopts two tower cyclical operations, one tower dewater one tower regeneration, relating operation be all sealing molecular sieve water separation tower in carry out.
Conventional molecular sieve dehydration comprises molecular sieve water separation tower, combustion heating furnace, knockout drum, by-pass valve control and relevant Controlling System.Will carry out strict pre-treatment and depickling, desulfurization, the operation of removing impurities matter before natural gas liquefaction, dehydration enters final liquefaction stage after being removed by the water in Sweet natural gas as pretreated last one requirements of process.In liquefaction engineering water contained in Sweet natural gas equipment can be caused to block, freeze, the problems such as liquefaction efficiency reduction, so the degree of depth of the many dehydrations of dehydration and the rear dewpoint requirements of dehydration are very strictly, molecular sieve adsorbing and dewatering operation is adopted to reach above-mentioned requirements.Sweet natural gas directly enters molecular sieve tower and carries out dehydration operation flow process after the pretreatment operation such as end desulfurization, supposes I tower dehydration, II tower regeneration.Sweet natural gas to be drained off is by valve control system there being to lower passing through molecular sieve dehydration I tower of molecular sieve, and it is moisture by molecular sieve adsorption that natural gas via crosses mol sieve beds institute, reaches the object of dehydration.Sweet natural gas after processed is discharged and is directly entered liquefaction stage at the bottom of tower; At the bottom of tower, II tower is entered after resurgent gases is heated to design temperature by combustion heating furnace simultaneously, from bottom to up molecular sieve saturated in tower is regenerated, when carrying out cold blowing operation after molecular sieve dehydration in tower completely i.e. regeneration ending, terminate cold blowing after reaching dehydration separation operation condition and wait for next dehydration operation, circulation like this is a work period, after a work period terminates by valve control system make I, II dehydration regeneration operation exchange, II tower dewater I tower regeneration so move in circles.
This molecular sieve dehydration flow process is carried out due to dehydration in normal pressure situation, and because gas volume is comparatively large, the equipment volume of use is comparatively large, is not suitable for small-sized skid; Powder phenomenon-tion can occur after molecular sieve dehydration regenerates for some time, the Sweet natural gas after dehydration can carry powder and enter liquefaction stage, can cause the problems such as the low and equipment blocking of liquefaction efficiency; Regenerative operation can produce a large amount of waste heat simultaneously resurgent gases also need to deal carefully with, effectively utilize, to reach cost-saving, reduce energy consumption, eco-friendly object.
Utility model content
The purpose of this utility model is to overcome and improve Problems existing in above-mentioned dewatering process flow, provides a kind of high pressure molecular sieve circulatory dewatering system.
The technical solution adopted in the utility model is as follows:
A kind of high pressure molecular sieve circulatory dewatering system, comprises Gas Dehydration System and the resurgent gases recycle system;
Described Gas Dehydration System comprises compressor, wire gauzee filter, I tower, control gas blower and the cyclonic separator of connecting successively, the entrance of described compressor is inlet mouth, its outlet is connected with wire gauzee filter, and the overflow port of described cyclonic separator upper end is air outlet, lower end is powder collection mouth;
The described resurgent gases recycle system comprises II tower, interchanger, surge tank, knockout drum, the combustion heating furnace of connecting successively; The top of II described tower is connected with the entrance of interchanger, I tower respectively, and the outlet of described combustion heating furnace is connected with I tower, II tower respectively.
II described tower, the top of I tower all with the outlet of wire gauzee filter, and on its pipeline connected series connection the 3rd valve, the 4th valve separately.
II described tower, the top of I tower are all communicated with the entrance of interchanger, and connect separately on its pipeline connected the first valve, second valve.
II described tower, the bottom of I tower are all communicated with the entrance of control gas blower, and connect separately on its pipeline connected the 5th valve, the 6th valve.
II described tower, the bottom of I tower all with the outlet of combustion heating furnace, and on its pipeline connected series connection the 7th valve, the 8th valve separately.
The overflow port of described cyclonic separator upper end is also connected with the entrance of interchanger, and the outlet of interchanger is connected with surge tank on the one hand, is connected on the one hand with combustion heating furnace.
The pipeline that overflow port in cyclonic separator upper end is connected with combustion heating furnace is provided with the 9th valve;
The entrance of described combustion heating furnace is directly connected with its outlet, and is provided with the tenth valve on its pipeline connected.
The dewatering of said system is as follows:
When I tower dehydration, during II tower regenerative operation, open second and third, five, eight valves, close first, fourth, six, seven valves;
The flow process of liquefaction is: first Sweet natural gas to be drained off enters compressor from inlet mouth, the liquid water and detrimental impurity that carry in wire gauzee filter removing Sweet natural gas is entered after reaching high top pressure operation condition, Sweet natural gas enters I column overhead and sloughs contained water by molecular sieve tower tray from top to bottom, gas blower is responsible for providing gas flow power, and the Sweet natural gas after dehydration at the bottom of I tower tower enters cyclonic separator tangential inlet; Centrifugal force difference is subject to because Sweet natural gas is different with the density of entrained molecular sieve powder, molecular sieve powder is thrown to limit wall and gets rid of from powder collection mouth, clean Sweet natural gas is discharged by upper end overflow port, and the Sweet natural gas after major part dehydration enters liquefaction flow path by air outlet;
The reprocessing cycle flow process of II tower is: open the 9th valve, close the tenth valve, combustion heating furnace is entered together with the Sweet natural gas that resurgent gases and a small amount of cyclone overflow mouth are discharged, enter at the bottom of II tower tower by pipeline after being heated to regeneration temperature, resurgent gases resolves the water in saturated molecular sieve by molecular sieve from the bottom to top successively, the resurgent gases of carrying water enters interchanger after II column overhead is discharged, , preheating is carried out to resurgent gases, resurgent gases temperature after preliminary heat exchange reduces, enter surge tank reduce temperature further and reduce pressure, flow velocity, and then anger enters knockout drum, the water carried is removed, dry resurgent gases completes primary recycling circulation after being discharged by knockout drum upper end venting port.
After regenerating molecular sieve terminates, in tower, temperature is high, pressure is large, carry out cold blowing operation again, namely close the 9th valve, open the tenth valve, resurgent gases directly enters at the bottom of II tower tower without process furnace carries out cold blowing from top to bottom, after reaching dehydration operation operating mode, close the 9th valve, the tenth valve, stop air inlet, prepare the dehydration operation of next stage.After a work period terminates, I tower, II tower function are exchanged, and I tower regeneration, II tower dehydration, workflow is constant.
The utility model first pressurizes to it before Sweet natural gas enters the dehydration of molecular sieve tower, and under high pressure operating mode, carry out dewatering operation, this operation is that a little equipment volume is little, the pressure-losses is little and is applicable to skid.Gas outlet arranges cyclonic separator to carry out gas solid separation to the Sweet natural gas being about to enter liquefaction stage and places the powder of molecular sieve and enter subordinate's liquefaction device occluding device and affect liquefaction efficiency.Whole flow process adopts closed cycle regenerative operation, and resurgent gases can recycle, and effectively can utilize the rear gas waste-heat of regeneration simultaneously, reduce energy consumption.
The beneficial effects of the utility model are as follows:
High top pressure operation equipment volume is little, is applicable to integrated skid; Import and export arrange wire gauzee filter and cyclonic separator ensures that Sweet natural gas turnover is not carried the influential impurity of operation, whole system heat and gas recycle, dewatering process flow efficient energy-saving, simple and convenient, clean environment firendly.
Accompanying drawing explanation
Fig. 1 system construction drawing of the present utility model;
In figure: 1 compressor, 2 wire gauzee filters, 3 surge tanks, 4 knockout drums, 5 combustion heating furnaces, 6 interchanger, 7 cyclonic separators, 8 control gas blower, 9 I towers, 10 II towers, 11 inlet mouths, 12 air outlets, 13 liquid exits, 14 overflow ports, 15 powder collection mouths, 1.-10. valve;
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail:
System of the present utility model comprises: comprise Gas Dehydration System and the resurgent gases recycle system;
Gas Dehydration System comprises compressor 1, wire gauzee filter 2, I tower 9, control gas blower 8 and the cyclonic separator 7 of connecting successively, the entrance of described compressor 1 is inlet mouth 11, its outlet is connected with wire gauzee filter 2, and the overflow port 14 of described cyclonic separator 7 upper end is air outlet 12, lower end is powder collection mouth 15;
The resurgent gases recycle system comprises II tower 10, interchanger 6, surge tank 3, knockout drum 4, the combustion heating furnace 5 of connecting successively; The top of II described tower 10 is connected with the entrance of interchanger 6, I tower 9 respectively, and the outlet of described combustion heating furnace 5 is connected with I tower 9, II tower 10 respectively.
The top of II described tower 10, I tower 9 all with the outlet of wire gauzee filter 2, and a series connection valve is 3., 4. separately on its pipeline connected.
The top of II described tower 10, I tower 9 is all communicated with the entrance of interchanger 6, and on its pipeline connected, connects a valve separately 1., 2..
The bottom of II described tower 10, I tower 9 is all communicated with the entrance of control gas blower 8, and on its pipeline connected, connects a valve separately 5., 6..
The bottom of II described tower 10, I tower 9 all with the outlet of combustion heating furnace, and a series connection valve is 7., 8. separately on its pipeline connected.
The overflow port of described cyclonic separator upper end is also connected with the entrance of interchanger, and the outlet of interchanger is connected with surge tank on the one hand, is connected on the one hand with combustion heating furnace.
The pipeline that overflow port in cyclonic separator upper end is connected with combustion heating furnace is provided with a valve 9.;
The entrance of described combustion heating furnace is directly connected with its outlet, and is provided with a valve 10. on its pipeline connected.
Concrete dewatering process flow is:
Schema hollow core arrow represents natural gas flow direction, filled arrows represents resurgent gases flow direction.
When I tower 9 dewaters, during II tower 10 regenerative operation, (2., 3., 5., 8. valve is opened, valve 1., 4., 6., 7. close), liquefaction idiographic flow is that first Sweet natural gas to be drained off enters compressor 1 from inlet mouth 11, enter wire gauzee filter 2 after reaching high top pressure operation condition and remove the liquid water and detrimental impurity that carry in Sweet natural gas, Sweet natural gas enters I tower 9 tower top and sloughs contained water by molecular sieve tower tray from top to bottom, gas blower 8 is responsible for providing gas flow power, Sweet natural gas after dehydration at the bottom of I tower 9 tower enters cyclonic separator 7 tangential inlet, centrifugal force difference is subject to because Sweet natural gas is different with the density of entrained molecular sieve powder, molecular sieve powder is thrown to limit wall and gets rid of from powder collection mouth, clean Sweet natural gas is discharged by upper end overflow port 14.Sweet natural gas after major part dehydration enters liquefaction flow path by air outlet 12.
(9. valve is opened to enter combustion heating furnace 5 together with the reprocessing cycle flow process of II tower 10 Sweet natural gas that to be resurgent gases discharge with a small amount of cyclonic separator 7 overflow port, 10. valve closes) be heated to regeneration temperature after enter at the bottom of II tower 10 tower by pipeline, resurgent gases resolves the water in saturated molecular sieve by molecular sieve from the bottom to top successively, the resurgent gases of carrying water enters interchanger 5 after II tower 10 tower top is discharged, , preheating is carried out to resurgent gases, the preheating of resurgent gases can be utilized like this, resurgent gases temperature after preliminary heat exchange reduces, enter surge tank 3 reduce temperature further and reduce pressure, flow velocity, and then anger enters knockout drum 4, the water carried is removed, dry resurgent gases completes primary recycling circulation after being discharged by knockout drum 4 upper end venting port.After regenerating molecular sieve terminates, in tower, temperature is high, pressure is large, cold blowing operation (9. valve closes, valve 10. open) will be carried out again, resurgent gases directly enters at the bottom of II tower 10 tower without process furnace carries out cold blowing from top to bottom, after reaching dehydration operation operating mode, (9. valve closes, valve 10. close) stops air inlet, prepares the dehydration operation of next stage.After a work period terminates, I tower 9, II tower 10 function is exchanged, and I tower 9 regenerates, II tower 10 dewaters, and workflow is constant.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (8)
1. a high pressure molecular sieve circulatory dewatering system, comprises Gas Dehydration System and the resurgent gases recycle system; It is characterized in that:
Described Gas Dehydration System comprises compressor, wire gauzee filter, I tower, control gas blower and the cyclonic separator of connecting successively, the entrance of described compressor is inlet mouth, its outlet is connected with wire gauzee filter, and the overflow port of described cyclonic separator upper end is air outlet, lower end is powder collection mouth;
The described resurgent gases recycle system comprises II tower, interchanger, surge tank, knockout drum, the combustion heating furnace of connecting successively; The top of II described tower is connected with the entrance of interchanger, I tower respectively, and the outlet of described combustion heating furnace is connected with I tower, II tower respectively.
2. high pressure molecular sieve circulatory dewatering system as claimed in claim 1, is characterized in that: II described tower, the top of I tower all with the outlet of wire gauzee filter, and on its pipeline connected respective connect the 3rd valve, the 4th valve.
3. high pressure molecular sieve circulatory dewatering system as claimed in claim 1, is characterized in that: II described tower, the top of I tower are all communicated with the entrance of interchanger, and connect separately on its pipeline connected the first valve, second valve.
4. high pressure molecular sieve circulatory dewatering system as claimed in claim 1, is characterized in that: II described tower, the bottom of I tower are all communicated with the entrance of control gas blower, and connect separately on its pipeline connected the 5th valve, the 6th valve.
5. high pressure molecular sieve circulatory dewatering system as claimed in claim 1, is characterized in that: II described tower, the bottom of I tower all with the outlet of combustion heating furnace, and on its pipeline connected respective connect the 7th valve, the 8th valve.
6. high pressure molecular sieve circulatory dewatering system as claimed in claim 1, it is characterized in that: the overflow port of described cyclonic separator upper end is also connected with the entrance of interchanger, and the outlet of interchanger is connected with surge tank on the one hand, be connected with combustion heating furnace on the one hand.
7. high pressure molecular sieve circulatory dewatering system as claimed in claim 1, is characterized in that: the pipeline that the overflow port in cyclonic separator upper end is connected with combustion heating furnace is provided with the 9th valve.
8. high pressure molecular sieve circulatory dewatering system as claimed in claim 1, is characterized in that: the entrance of described combustion heating furnace is directly connected with its outlet, and is provided with the tenth valve on its pipeline connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520215039.5U CN204509235U (en) | 2015-04-10 | 2015-04-10 | A kind of high pressure molecular sieve circulatory dewatering system |
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| CN201520215039.5U CN204509235U (en) | 2015-04-10 | 2015-04-10 | A kind of high pressure molecular sieve circulatory dewatering system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104745261A (en) * | 2015-04-10 | 2015-07-01 | 青岛捷能高新技术有限责任公司 | High-pressure molecular sieve circulating dehydration system and method |
| CN112403199A (en) * | 2020-11-17 | 2021-02-26 | 杭州天利空分设备制造有限公司 | Molecular sieve circulating device of PSA adsorption bed |
-
2015
- 2015-04-10 CN CN201520215039.5U patent/CN204509235U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104745261A (en) * | 2015-04-10 | 2015-07-01 | 青岛捷能高新技术有限责任公司 | High-pressure molecular sieve circulating dehydration system and method |
| CN112403199A (en) * | 2020-11-17 | 2021-02-26 | 杭州天利空分设备制造有限公司 | Molecular sieve circulating device of PSA adsorption bed |
| CN112403199B (en) * | 2020-11-17 | 2022-06-24 | 杭州天利空分设备制造有限公司 | Molecular sieve circulating device of PSA (pressure swing adsorption) bed |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160410 |