CN207012812U - MDEA regenerative device of solution during a kind of caustic wash desulfuration - Google Patents
MDEA regenerative device of solution during a kind of caustic wash desulfuration Download PDFInfo
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- CN207012812U CN207012812U CN201720825208.6U CN201720825208U CN207012812U CN 207012812 U CN207012812 U CN 207012812U CN 201720825208 U CN201720825208 U CN 201720825208U CN 207012812 U CN207012812 U CN 207012812U
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Abstract
The utility model provides MDEA regenerative device of solution during a kind of caustic wash desulfuration, including preheating device, alkali pump, membrane module, surge tank, cooling device, vavuum pump, air compressor machine and fluid reservoir, membrane module is divided into delivery air chamber by hydrophobic membrane, solution room and purification room, delivery air chamber and purification room are located at the both sides of solution room respectively, air compressor machine connects the entrance of delivery air chamber, preheating device connects with the thermal medium layer of solution room, the inlet communication of alkali pump and solution room, the outlet of solution room is connected with fluid reservoir, the outlet of purification room is connected with vavuum pump, vavuum pump is connected with surge tank, the cold medium layer of surge tank connects with cooling device.This regenerating unit is using vacuum membrane distillation regeneration MDEA solution, and floor space is smaller, and operating pressure is low, and energy consumption is low；Fouling membrane is improved, improves flux of membrane distillation, extends the service life of film；Heat pump functional is added, greatlys save the energy consumption of device in regenerative process.
Description
Technical field
A kind of MDEA regenerative device of solution is the utility model is related to, it is molten more particularly, to MDEA during a kind of caustic wash desulfuration
Liquid regenerating unit.
Background technology
The sour gas such as a certain amount of hydrogen sulfide and carbon dioxide, these foreign gases are included in the natural gas directly produced
Equipment and pipeline can be caused to corrode, and threaten health, therefore by sulphur before natural gas for users to use is obtained
Change the sour gas such as hydrogen and carbon dioxide to remove from natural gas.Absorption process using alkaline solution MDEA as absorbent is current state
It is inside and outside to use most extensive and most ripe method.Absorbing liquid MDEA can be desorbed after saturation is absorbed to be regenerated and
It is recycled in desulfurizer.
In the prior art commonly use regenerator vaporizing extract process MDEA is regenerated, regeneration tower bottom be passed through a large amount of vapor and
Air, the partial pressure of solution surface solute is reduced, acidic components stripping is come out, desorbed, but process needs are not open close
Enter saturated vapor, be a kind of high processing method of energy consumption, a series of problems be present.
Membrane distillation is in film both sides vapour pressure deficit using separation component, be can be achieved below feed liquid boiling temperature in feed liquid
Volatilizable component with can not volatile component separation.The side of its film of vacuum membrane distillation is negative pressure, and the pressure difference of film both sides is bigger, is
The isolation technics that a kind of cold and hot resource utilization is high, flux is big, has been used in the regeneration technology of MDEA solution at present.So
And it is existing still very low to the distillating ventilating amount of film in MDEA progress regenerative processes using membrane distillation, and due to temperature pole be present
Change and concentration polarization, system running state is unstable, easily causes fouling membrane, makes flux depression, and the life-span is reduced.Before and after UF membrane
Preheating to rich MDEA and the cooling to the sour gas of desorption also still need to consume certain energy consumption, and the energy consumption for preheating and cooling down is simultaneously
It is not fully utilized, makes whole system regeneration energy consumption still very high.
The content of the invention
Problem to be solved in the utility model is to provide MDEA regenerative device of solution during a kind of caustic wash desulfuration, makes whole
Energy consumption in MDEA solution reclaiming process substantially reduces, and treating capacity improves.
In order to solve the above technical problems, the technical solution adopted in the utility model is：MDEA during a kind of caustic wash desulfuration
Regenerative device of solution, including preheating device, alkali pump, membrane module, surge tank, cooling device, vavuum pump, air compressor machine and fluid reservoir,
Membrane module is divided into delivery air chamber, solution room and purification room by hydrophobic membrane, and delivery air chamber and purification room are located at solution respectively
The both sides of room, air compressor machine connect the entrance of delivery air chamber, and preheating device connects with the thermal medium layer of solution room, alkali pump and solution
The inlet communication of room, the outlet of solution room are connected with fluid reservoir, and the outlet for purifying room is connected with vavuum pump, vavuum pump and surge tank
Connection, the cold medium layer of surge tank connect with cooling device.
In technical scheme, it is preferred that also including compressor and choke valve, preheating device is condenser, and cooling device is steaming
Device is sent out, condenser includes the first heat pump dielectric layer and the first feed liquid layer, and the thermal medium layer of solution room connects with the first feed liquid layer, and
Circulation loop is formed, evaporator includes the second heat pump dielectric layer and the second feed liquid layer, the cold medium layer and the second feed liquid of surge tank
Layer connection, and circulation loop is formed, the first heat pump dielectric layer, compressor, the second heat pump dielectric layer and choke valve are sequentially connected, structure
Into heat pump cycle loop.
In technical scheme, it is preferred that also including first flowmeter, first pressure meter and the first control valve, the first control valve,
First flowmeter and first pressure meter are sequentially arranged between alkali pump and the import of solution room.
In technical scheme, it is preferred that also including second flowmeter, second pressure meter and the second control valve, the second control valve,
Second flowmeter and second pressure meter are sequentially arranged between the outlet of solution room and fluid reservoir.
The utility model has the advantages and positive effects of：
1. the present apparatus is using vacuum membrane distillation regeneration MDEA solution, floor space is smaller compared with traditional desorber, operation
Pressure reduces, and energy consumption reduces；
2. by membrane module solution room side add delivery air chamber, to hydrophobic membrane direction produce disturbance, destroy hot side
Interlayer, improve fouling membrane, improve flux of membrane distillation, extend the service life of film；
3. heat pump is used to greatly save and regenerated for the preheating before and after membrane distillation and condensing unit heat supply and recovery heat energy
The energy consumption of device in journey.
Brief description of the drawings
Fig. 1 is the structural representation of MDEA regenerative device of solution of the present utility model.
In figure：
1st, alkali pump 2, preheating device 3, membrane module
4th, surge tank 5, cooling device 6, vavuum pump
7th, air compressor machine 8, fluid reservoir 9, compressor
10th, choke valve 11, control valve 12, flowmeter
13rd, pressure gauge 14, control valve 15, flowmeter
16th, pressure gauge 17, thermal medium layer 18, cold medium layer
21st, heat pump dielectric layer 22, feed liquid layer 31, delivery air chamber
32nd, solution room 33, purification room 51, heat pump dielectric layer
52nd, feed liquid layer
Embodiment
The utility model embodiment is described further below in conjunction with the accompanying drawings：
As shown in figure 1, MDEA regenerative device of solution during a kind of caustic wash desulfuration described in the present embodiment, including alkali pump 1,
Preheating device 2, membrane module 3, surge tank 4, cooling device 5, vavuum pump 6, air compressor machine 7 and fluid reservoir 8, wherein alkali pump 1 and desulfurization
The outlet connection of the rich MDEA solution of device, for rich MDEA solution to be pumped into membrane module 3, by hydrophobic membrane point in membrane module 3
Delivery air chamber 31, solution room 32 and purification room 33 are segmented into, delivery air chamber 31 and purification room 33 are respectively positioned at solution room 32
Both sides, the gas outlet of air compressor machine 7 connect with delivery air chamber 31, provide compressed air for delivery air chamber 31, are set on membrane module 3
There is a thermal medium layer 17, the thermal medium exit port both ends of preheating device 2 inlet and outlet both ends with the thermal medium layer 17 of membrane module 3 respectively
Rich MDEA solution in solution room 32 is heated to certain temperature, outlet and the solution room 32 of alkali pump 1 by connection, preheating device 2
Inlet communication, rich MDEA solution is delivered in solution room 32, the outlet of solution room 32 is connected with the entrance of fluid reservoir 8, through richness
The poor MDEA solution that MDEA solution obtains after desorption is sent into fluid reservoir 8, is again introduced into desulfurizing tower, carries out desulfurization operations.
The outlet of purification room 33 is connected with vavuum pump 6, and vavuum pump 6 constantly vacuumizes to purification room 33, rapidly will be saturating by hydrophobic membrane
Enter to purify sour gas in room 33 to take away, and purification room 33 is remained negative pressure state, outlet and the surge tank 4 of vavuum pump 6
Connection, constantly sour gas is pumped into surge tank 4, the outside of surge tank 4 is provided with cold medium layer 18, the cold medium layer of surge tank 4
18 inlet and outlet are connected with the cold medium exit port of cooling device 5 respectively, the sour gas that cooling device 5 will be collected in surge tank 4
Body is cooled to liquid, delivers to the sulphur production installation of postorder, further utilizes sour gas.
The present apparatus is regenerated using vacuum membrane distillation to MDEA solution, not only can be big compared with traditional regenerator
Save land area and reduce operating pressure greatly, moreover it is possible to the utilization of energy in regenerative process is reduced, it is cost-effective.
During use, compressed gas enters solution room 32 by delivery air chamber 31 through hydrophobic membrane, on the one hand makes solution room
Pressure ratio purification room 33 in 32 is high, makes pressure differential be present between solution room 32 and purification room 33, membrane flux is improved, so as to improve
Membrane separation efficiency, it is on the other hand, instant because the hydrophobic membrane surface between solution room 32 and purification room 33 has thermal boundary layer
In liquid room 32 temperature on hydrophobic membrane surface be less than feed liquid main body temperature, formed temperature polarization phenomenon, and compressed air enter it is molten
Disturbance is being produced to the solution in solution room 32 perpendicular to the film surface direction of hydrophobic membrane behind liquid room 32, is destroying thermal boundary layer, effectively
Temperature polarization phenomenon is reduced, can prevent that hydrophobic membrane surface local concentration is too high, solute, which separates out, blocks nib, makes under separative efficiency
Drop, separation membrane lifetime are reduced.
Wherein, control valve 11, flowmeter are additionally provided with the pipeline between alkali pump 1 and the entrance of solution room 32 of membrane module 3
12 and pressure gauge 13, control valve 11 can control the treating capacity of rich MDEA solution in whole loop, and flowmeter 12 and pressure gauge 13 are real
When monitoring circuit in rich MDEA solution before membrane module 3 flow and pressure condition, ensure the normal operation of equipment.
Control valve 14, stream are additionally provided with pipeline between the outlet of the solution room 32 of membrane module 3 and the import of fluid reservoir 8
Gauge 15 and pressure gauge 16, the poor MDEA solution obtained after the control process of control valve 14 enter the amount of fluid reservoir 8, the He of flowmeter 15
The flow and pressure condition of poor MDEA solution in 16 real-time monitoring circuit of pressure gauge after membrane module 3, ensure membrane module 3 after
Equipment normal operation.
Wherein, it is preferred that heat pump can be added, greatly reduce the energy consumption that membrane module 3 is preheated and condensed.Wherein pre- hot charging
2 condensers for being heat pump are put, cooling device 5 is the evaporator of heat pump, and heat pump also includes compressor 9 and choke valve 10.It is cold
Condenser includes heat pump dielectric layer 21 and feed liquid layer 22, and feed liquid layer 22 imports and exports the thermal medium layer exit port with membrane module 3 respectively
Connection, forms circulation loop, and the evaporator of heat pump includes heat pump dielectric layer 51 and feed liquid layer 52, the inlet and outlet difference of feed liquid layer 52
Connected with the exit port of surge tank 4, form circulation loop, heat pump dielectric layer 21, compressor 9, the heat pump of evaporator of condenser
Dielectric layer 51 and choke valve 10 are sequentially connected, and are formed heat pump cycle loop, are full of cold and hot medium, cold and hot Jie in heat pump cycle loop
It is that solution room 32 provides heat that matter is cooled to heat release during liquid within the condenser, and liquid medium is depressurized in choke valve 10, is changed into
Superheated liquid medium, it is gas by the heat of vaporization for absorbing surge tank 4 into evaporator, and in evaporator, makes surge tank 4
In sour gas be cooled to liquid, last gas medium is compressed to liquid by compressor 9, carries out heat pump next time and follows
Ring.The addition of heat pump causes the heat in the device in preheating device 2 and cooling device 5 to be fully utilized, and significantly
The separating energy consumption of whole regenerating unit is saved.
MDEA regenerative device of solution has the advantage that and beneficial effect during a kind of caustic wash desulfuration described in the present embodiment
It is：The present apparatus is using vacuum membrane distillation regeneration MDEA solution, and floor space is smaller compared with traditional desorber, operating pressure drop
Low, energy consumption reduces；By in membrane module solution room side add delivery air chamber, to hydrophobic membrane direction produce disturbance, destroy heat
Boundary layer, improve fouling membrane, improve flux of membrane distillation, extend the service life of film；Heat pump is used as the preheating before and after membrane distillation
With condensing unit heat supply and recovery heat energy, the energy consumption of device in regenerative process is greatlyd save.
One embodiment of the present utility model is described in detail above, but the content is only of the present utility model
Preferred embodiment, it is impossible to be considered as being used to limit practical range of the present utility model.It is all to be made according to present utility model application scope
Equivalent change with improve etc., all should still belong within patent covering scope of the present utility model.
Claims (4)
- A kind of 1. MDEA regenerative device of solution during caustic wash desulfuration, it is characterised in that：Including preheating device, alkali pump, membrane module, Surge tank, cooling device, vavuum pump, air compressor machine and fluid reservoir, the membrane module are divided into delivery air chamber, solution by hydrophobic membrane Room and purification room, the delivery air chamber and the purification room are located at the both sides of the solution room, the air compressor machine connection respectively The entrance of the delivery air chamber, the membrane module are provided with thermal medium layer, the thermal medium inlet and outlet of the preheating device and institute State the thermal medium layer connection of membrane module, the inlet communication of the alkali pump and the solution room, the outlet of the solution room with it is described Fluid reservoir is connected, and the outlet of the purification room is connected with the vavuum pump, and the vavuum pump is connected with the surge tank, described slow Rush tank and be provided with cold medium layer, the cold medium layer of the surge tank connects with the cold medium inlet and outlet of the cooling device.
- 2. MDEA regenerative device of solution according to claim 1, it is characterised in that：Also include compressor and choke valve, institute It is condenser to state preheating device, and the cooling device is evaporator, and the condenser includes the first heat pump dielectric layer and the first material Liquid layer, the thermal medium layer of the solution room connects with the first feed liquid layer, and forms circulation loop, and the evaporator includes the Two heat pump dielectric layers and the second feed liquid layer, the cold medium layer of the surge tank connects with the second feed liquid layer, and forms circulation Loop, the first heat pump dielectric layer, the compressor, the second heat pump dielectric layer and the choke valve are sequentially connected, structure Into heat pump cycle loop.
- 3. MDEA regenerative device of solution according to claim 1 or 2, it is characterised in that：Also include first flowmeter, first Pressure gauge and the first control valve, first control valve, the first flowmeter and the first pressure meter are sequentially arranged in described Between the import of alkali pump and the solution room.
- 4. MDEA regenerative device of solution according to claim 1 or 2, it is characterised in that：Also include second flowmeter, second Pressure gauge and the second control valve, second control valve, the second flowmeter and the second pressure meter are sequentially arranged in described Between the outlet of solution room and the fluid reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720825208.6U CN207012812U (en) | 2017-07-10 | 2017-07-10 | MDEA regenerative device of solution during a kind of caustic wash desulfuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720825208.6U CN207012812U (en) | 2017-07-10 | 2017-07-10 | MDEA regenerative device of solution during a kind of caustic wash desulfuration |
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| Publication Number | Publication Date |
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| CN207012812U true CN207012812U (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720825208.6U Expired - Fee Related CN207012812U (en) | 2017-07-10 | 2017-07-10 | MDEA regenerative device of solution during a kind of caustic wash desulfuration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108744890A (en) * | 2018-07-06 | 2018-11-06 | 常州大学 | A kind of the desulfurization regeneration technique and device of MDEA sulfur-bearings rich solution |
-
2017
- 2017-07-10 CN CN201720825208.6U patent/CN207012812U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108744890A (en) * | 2018-07-06 | 2018-11-06 | 常州大学 | A kind of the desulfurization regeneration technique and device of MDEA sulfur-bearings rich solution |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180216 Termination date: 20200710 |
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| CF01 | Termination of patent right due to non-payment of annual fee |