CN113493711B - Corrosion control device and lean amine liquid regeneration system - Google Patents
Corrosion control device and lean amine liquid regeneration system Download PDFInfo
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- CN113493711B CN113493711B CN202010277675.6A CN202010277675A CN113493711B CN 113493711 B CN113493711 B CN 113493711B CN 202010277675 A CN202010277675 A CN 202010277675A CN 113493711 B CN113493711 B CN 113493711B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
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- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Abstract
The application discloses corrosion control device and lean amine liquid regeneration system belongs to natural gas purification technical field. The device comprises: a plurality of baffle plates, a support frame and a mist catcher; the plurality of baffle plates comprise a plurality of first baffle plates and a plurality of second baffle plates; each first baffle plate is connected with the surface of the support frame, each second baffle plate is connected with the surface of the mist catcher, and each first baffle plate and each second baffle plate are arranged oppositely and at intervals; the outer wall of the support frame is used for being connected with the inner wall of the regeneration tower facing the tower top direction; the outer wall of the mist catcher is used for being connected with the inner wall of the regeneration tower facing the tower kettle. Therefore, the corrosion of the lean amine liquid and the acid gas to the inner wall and the gas phase channel of the regeneration tower can be effectively slowed and controlled by controlling the flow rate of the lean amine liquid and the acid gas and adjusting the flow state of the lean amine liquid and the acid gas.
Description
Technical Field
The application relates to the technical field of natural gas purification, in particular to a corrosion control device and a lean amine liquid regeneration system.
Background
In sulfur-containing natural gas processing plants, the natural gas is usually deacidified by an amine deacidification method in a chemical absorption method, namely, a weakly alkaline amine liquid Methyldiethanolamine (MDEA) chemical solvent is used for absorbing H contained in the natural gas2And S. Absorb H2The MDEA amine-rich liquid of S can enter a regeneration tower, the MDEA amine-rich liquid can be decomposed at high temperature in the regeneration tower, and acid gas is released, so that the amine-rich liquid is regenerated into an amine-poor liquid. However, the lean amine solution generated in the process of decomposing the MDEA rich amine solution contains H with stronger corrosiveness2S, water and MDEA degradation products, and the like, so when the lean amine liquid with high flow rate enters the regeneration tower, the inner wall of the regeneration tower and a gas lift cylinder in the regeneration tower are corroded, the service cycle of the regeneration tower is shortened, and the production running cost is increased.
In the related art, a corrosive medium is isolated by applying a coating material to the inner wall of the regeneration tower and the surface of the lift cylinder to form a coating layer or a non-metallic material.
However, the coating of the coating or the adhesion of the non-metallic material requires prefabrication in a regeneration tower manufacturing plant and the processing process is complicated. Meanwhile, the coating or the non-metal material has the risk of peeling under the high-temperature and high-flow-velocity fluid shearing force.
Disclosure of Invention
The application provides a corrosion control device and lean amine liquid regeneration system can solve the problem that the coating or non-metal material has the risk of droing among the correlation technique. The technical scheme is as follows:
in one aspect, there is provided a corrosion control apparatus, the apparatus comprising: a plurality of baffle plates, a support frame and a mist catcher;
the plurality of baffle plates comprise a plurality of first baffle plates and a plurality of second baffle plates;
the first end of each first baffle plate is connected with the surface of the support frame, the first end of each second baffle plate is connected with the surface of the mist catcher, and the second end of each first baffle plate is opposite to the second end of each second baffle plate and is arranged at intervals;
the outer wall of the support frame is used for being connected with the inner wall of the regeneration tower facing the tower top direction;
the outer wall of the mist catcher is used for being connected with the inner wall of the regeneration tower towards the direction of the tower kettle.
Optionally, the device further comprises a first support leg;
one end of the first supporting leg is connected with the outer wall of the supporting frame, and the other end of the first supporting leg is connected with the inner wall of the regeneration tower towards the direction of the tower top.
Optionally, the mist catcher comprises a wire mesh frame and a wire mesh, and the edge of the wire mesh is connected with the wire mesh frame along the circumferential direction of the inner wall of the wire mesh frame;
the second baffle plate is connected with the bottom surface of the silk screen, and the outer wall of the silk screen frame is connected with the inner wall of the regeneration tower facing the tower kettle.
Optionally, the apparatus further comprises a second support foot;
one end of the second supporting leg is connected with the outer wall of the wire net rack, and the other end of the second supporting leg is used for being connected with the inner wall of the regeneration tower towards the tower kettle direction.
Optionally, the aperture of the silk screen ranges from 10 meshes to 150 meshes.
Optionally, the projection area of the first baffle plate on the second baffle plate accounts for 0-80% of the second baffle plate.
Optionally, the first baffle plate and the second baffle plate are both provided with flow guide holes.
Optionally, the diameter of the diversion hole is 0.5-10.0 mm.
Optionally, the number of the plurality of baffles is 2-5.
In one aspect, a lean amine liquid regeneration system is provided, the system comprising: a condenser, a regeneration column, a gas phase channel, a reboiler and any of the corrosion control devices described above;
the tower top of the regeneration tower is connected with the condenser, a first liquid inlet is formed in the first side edge of the regeneration tower, and the first liquid inlet is used for enabling the rich amine liquid to enter the regeneration tower;
a first liquid outlet is formed in the second side edge of the regeneration tower, the first liquid outlet is connected with the top of the reboiler, and the bottom of the reboiler is connected with a second liquid inlet in the second side edge of the regeneration tower;
the gas phase channel and the corrosion control device are both positioned in the regeneration tower, the gas phase channel is positioned between the corrosion control device and the tower top of the regeneration tower, and the corrosion control device is opposite to the second liquid inlet.
The technical scheme provided by the application can at least bring the following beneficial effects:
after the lean amine liquid enters the regeneration tower, the lean amine liquid flowing at a high speed can be beaten on the baffle plate, and at the moment, the lean amine liquid flowing at a high speed is guided by the baffle plate, the flow speed can be reduced, and the lean amine liquid can be more uniformly distributed in the regeneration tower, so that the lean amine liquid flowing at a high speed in a single flow direction can be effectively prevented from scouring and corroding the wall of the tower. In addition, after entering the regeneration tower, the lean amine liquid can be separated into the lean amine liquid and the acid gas flow, the acid gas flow can pass through the holes on the mist catcher, and the large liquid drops of the residual lean amine liquid can be blocked by the mist catcher, so that the lean amine liquid can be blocked from rising, the flow rate of the acid gas flow can be reduced, and the scouring corrosion of the acid gas flow to the gas phase channel can be relieved. The device has the advantages of low cost, simple process and no need of operation and maintenance in the later period.
Drawings
FIG. 1 is a schematic structural diagram of a first corrosion control device provided in an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a baffle according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a second corrosion control device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a first mist trap provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a second mist trap provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a lean amine liquid regeneration system according to an embodiment of the present disclosure.
Reference numerals:
1: a baffle plate; 11: a first baffle plate; 12: a plurality of second baffles; 2: a support frame; 21: a surface of a support frame; 3: a mist catcher; 31: the surface of the mist trap; 32: a wire frame; 33: a wire mesh; 4: a flow guide hole; 5: a first supporting leg; 6: a second support leg; 7: a condenser; 8: a regeneration tower; 81: the top of the regeneration tower; 82: a first side of the regeneration tower; 821: a first liquid inlet; 822: a second liquid inlet; 83: a second side of the regeneration tower; 831: a first liquid outlet; 832: a fourth liquid inlet; 833: a third liquid inlet; 9: a gas phase channel; 10: a reboiler; 101: the top of the reboiler; 102: the bottom of the reboiler; 111: a corrosion control device.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Before explaining the embodiments of the present application in detail, an application scenario of the embodiments of the present application will be described.
When the lean amine liquid flowing at high speed enters the regeneration tower, the mass transfer process between the lean amine liquid and the rich amine liquid is accelerated due to the over-high flow speed of the lean amine liquid, so that H in the lean amine liquid can be generated2S and CO2When the contact area between the depolarizer and the inner wall of the regeneration tower is increased, the corrosion product film formed on the inner wall of the regeneration tower falls off, or the metal surface passivation film on the inner wall of the regeneration tower is thinned and broken, so that the corrosion rate is accelerated, and even the corrosion rate can reach more than 1 mm/a. Therefore, measures are required to reduce the corrosion rate.
The amine deacidification mainly comprises two parts of absorption and regeneration, wherein the MDEA lean solution becomes MDEA rich amine solution after absorbing acid gas in the sulfur-containing natural gas in an absorption tower, then the MDEA rich amine solution enters a regeneration tower to be regenerated into lean amine solution, and then the lean amine solution circularly enters the absorption tower to absorb the acid gas in the sulfur-containing natural gas again. In the absorption tower, the flow rate of the MDEA lean solution is in direct proportion to the circulating amount, namely when the circulating amount is larger, the MDEA lean solution is more fully contacted with the sulfur-containing natural gas in unit time, so that the improvement of H in the sulfur-containing natural gas is facilitated2S、CO2And obtaining a purified natural gas product which reaches the quality standard after the removal rate of the acid gas is equal. Therefore, when the erosion corrosion rate of the regeneration tower is controlled, the flow velocity and flow state of the lean solution cannot be directly controlled by reducing the circulation amount, but the flow velocity of the lean solution is reduced, the flow state of the lean solution is adjusted, and the kinetic energy of the lean solution is reduced while the circulation amount of the lean solution is not changed, so that the purpose of slowing down and controlling the corrosion rate is achieved.
Fig. 1 is a schematic structural diagram of a corrosion control apparatus according to an embodiment of the present disclosure. Referring to fig. 1, the apparatus includes: a plurality of baffle plates 1, a support frame 2 and a mist catcher 3; wherein the plurality of baffles 1 comprise a plurality of first baffles 11 and a plurality of second baffles 12; the first end of each first baffle plate 11 is connected with the surface 21 of the support frame 2, the first end of each second baffle plate 12 is connected with the surface 31 of the mist catcher 3, and the second end of each first baffle plate 11 is opposite to the second end of each second baffle plate 12 and is arranged at intervals; the outer wall of the support frame 2 is used for being connected with the inner wall of the regeneration tower facing the direction of the tower top; the outer wall of the mist catcher 3 is connected with the inner wall of the regeneration tower facing the tower kettle.
The device provided by the embodiment of the application has the following technical effects:
after the lean amine liquid enters the regeneration tower, the lean amine liquid flowing at a high speed can be beaten on the baffle plate 1, and at the moment, the flow speed of the lean amine liquid flowing at a high speed can be reduced under the flow guide of the baffle plate 1 and can be more uniformly distributed in the regeneration tower, so that the lean amine liquid flowing at a high speed in a single flow direction can be effectively prevented from scouring and corroding the tower wall. In addition, after entering the regeneration tower, the lean amine liquid can be separated into the lean amine liquid and the acid gas flow, the acid gas flow can pass through the mist catcher 3, and the large liquid drops of the remaining lean amine liquid can be blocked by the mist catcher 3, so that the lean amine liquid can be blocked from rising, the flow rate of the acid gas flow can be reduced, and the scouring corrosion of the acid gas flow to the gas phase channel can be relieved. The device has the advantages of low cost, simple process and no need of operation and maintenance in the later period.
It should be noted that the baffle plate 1 is a member for receiving the impact force of the lean amine liquid flowing at a high speed and changing the flow rate and flow pattern of the lean amine liquid. The size and the material of the baffle plate can be preset according to the use requirement, for example, the material of the baffle plate 1 can be 316 stainless steel, alloy and the like, and the embodiment of the application does not specifically limit this.
The number of the baffle plates 1 can be preset according to the use requirement, for example, the number of the baffle plates 1 can be 2-5. By way of example, the number of baffles 1 may be 2, 3, 4, or 5, and the like, which is not particularly limited in the embodiments of the present application.
The support frame 2 is a member for supporting and fixing the first baffle plate 11. The material and size of the support frame 2 can be preset according to the use requirement, for example, the material of the support frame 2 can be alloy, stainless steel, etc., and the embodiment of the present application does not specifically limit this.
The mist trap 3 is a member for fixing the second baffle 12. The material and size of the mist trap 3 may be preset according to the use requirement, for example, the material of the mist trap 3 may be alloy, 316 stainless steel, and the like, which is not particularly limited in the embodiments of the present application.
It should be noted that the first baffle plate 11 and the second baffle plate 12 are made of the same material and have the same size, only the first end of the first baffle plate 11 is connected to the support frame 2, and one end of the second baffle plate 12 is connected to the mist catcher 3.
It should be noted that, referring to fig. 2, the diversion holes 4 are disposed on both the first diversion plate 11 and the second diversion plate 12. The number of the diversion holes 4 can be preset according to the use requirement, so long as the lean amine liquid impacting on the first diversion plate 11 and the second diversion plate 12 can be ensured to pass through the diversion holes 4, thus reducing the flow rate of the lean amine liquid and avoiding the lean amine liquid impacting on the first diversion plate 11 and the second diversion plate 12 from generating anti-provincial concussion.
It should be noted that the size of the diversion hole 4 may be preset according to a use requirement, for example, the aperture of the diversion hole 4 may be 0.5-10.0 mm. For example, the aperture of the diversion hole 4 may be 0.5mm, 3.0mm, 5.5mm, 8mm, 10mm, or the like, which is not particularly limited in the embodiments of the present application.
It is worth noting that after the lean amine liquid passes through the plurality of baffle plates 1, the flow velocity of the lean amine liquid is greatly reduced, so that the impact force of the lean amine liquid on the baffle plates 1 is also reduced, and therefore when the flow guide holes 4 are arranged, the aperture of the flow guide hole 4 on the baffle plate 1 which first bears the impact force of the lean amine liquid can be set to be the largest, and then the aperture of the flow guide hole 4 on the baffle plate 1 can be gradually reduced, so that the flow state of the lean amine liquid can be well changed from a turbulent state to a steady state, and the flow velocity of the lean amine liquid can be further reduced.
It should be noted that, the connection manner between the first end of the first baffle plate 11 and the surface 21 of the support frame 2 may be preset according to the use requirement, for example, the first end 1 of the first baffle plate 11 and the surface 21 of the support frame 2 may be welded, and the first end of the first baffle plate 11 and the surface 21 of the support frame 2 may also be connected by using a screw, which is not limited in this application.
The connection between the first end of the second baffle plate 12 and the surface 31 of the mist trap 3 may be preset according to the use requirement, for example, the first end of the second baffle plate 12 and the surface 31 of the mist trap 3 may be welded, and the first end of the second baffle plate 12 and the surface 31 of the mist trap 3 may also be connected by screws, which is not limited in this embodiment.
It should be noted that, when the second end of each first baffle plate 11 is opposite to and spaced apart from the second end of each second baffle plate 12, the distance between the support frame 2 and the mist catcher 3 may be preset according to the use requirement. For example, the distance between the support frame 2 and the mist trap 3 may be just equal to the length of the first baffle 11 or the second baffle 12. At this time, the lean amine liquid may flow only between the plurality of baffles 1 through the guide holes 4. The distance between the support frame 2 and the mist trap 3 may also be greater than the length of the first baffle plate 11 or the second baffle plate 12, and at this time, the projection area of the first baffle plate 11 on the second baffle plate 12 may occupy 0 to 80% of the second baffle plate 12. For example, the projected area of the first baffle plate 11 on the second baffle plate 12 may account for 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, or 80% of the second baffle plate 12. At this time, after the lean amine liquid impacts the first baffle plate 11, only a part of the lean amine liquid passes through the diversion holes 4 on the first baffle plate 11, and the rest of the lean amine liquid can directly reach the second baffle plate 12, so that the flow rate of the lean amine liquid passing through the diversion holes 4 can be reduced, the flow rate of the lean amine liquid can be further reduced, and the flow direction and the flow state of the lean amine liquid can be changed.
For example, when the corrosion control device is used to control corrosion, the outer wall of the support frame 2 may be connected to the inner wall of the regeneration tower in the tower top direction, and the outer wall of the mist trap 3 may be connected to the inner wall of the regeneration tower in the tower bottom direction. At this time, when the lean amine liquid enters the regeneration tower, the lean amine liquid flowing at a high speed will first impact on the baffle plate 1 and flow backwards through the diversion holes 4 arranged on the baffle plate 1. And the lean amine liquid is also separated into lean amine liquid and acid gas in the flowing process, the acid gas flows towards the top of the regeneration tower through the mist catcher 3, and the lean amine liquid is blocked by the mist catcher 3 and flows towards the bottom of the regeneration tower. Therefore, the flow velocity of the lean amine liquid and the acid gas can be reduced, so that the impact force of the lean amine liquid and the acid gas can be reduced, and the scouring corrosion of the lean amine liquid on the inner wall of the regeneration tower and the gas phase channel by the acid gas can be relieved.
Optionally, referring to fig. 3, the device further comprises a first support foot 5; one end of the first supporting leg 5 is connected with the outer wall of the supporting frame 2, and the other end of the first supporting leg 5 is connected with the inner wall of the regeneration tower facing the tower top direction.
The first support leg 5 is a member for connecting the outer wall of the support frame 2 to the inner wall of the regeneration tower in the tower top direction. The size and type of the first supporting leg 5 may be preset according to a use requirement, for example, the number of the first supporting legs 5 may be 2, the positions of the 2 first supporting legs 5 are opposite, and both the two first supporting legs are connected to the outer wall of the supporting frame 2, which is not particularly limited in the embodiment of the present application.
It should be noted that, the connection mode between one end of the first supporting leg 5 and the outer wall of the supporting frame 2 may be preset according to the use requirement, for example, one end of the first supporting leg 5 may be welded on the outer wall of the supporting frame 2. One of first supporting leg 5 serves and also can be provided with the external screw thread, is provided with the through-hole on the outer wall of support frame 2, is provided with the internal thread on the pore wall of this through-hole, and the one end of first supporting leg 5 can be placed in this through-hole to with this through-hole threaded connection, so can dismantle between the one end of first supporting leg 5 and the outer wall of support frame 2 and be connected, and should connect convenient and fast more.
The connection mode between the other end of the first supporting leg 5 and the inner wall of the regeneration tower facing the tower top direction may be preset according to the use requirement, for example, the other end of the first supporting leg 5 may be welded on the inner wall of the regeneration tower facing the tower top direction.
It should be noted that when the difference between the total length of the first supporting legs 5 and the supporting frames 2 and the inner diameter of the regeneration tower is very small, for example, the difference is 0.01mm or 0.02mm, the first supporting legs 5 and the supporting frames 2 can be directly clamped in the regeneration tower, and the other end of the first supporting legs 5 can be directly contacted with the inner wall of the regeneration tower instead of being connected with the inner wall of the regeneration tower. Thus, the position of the support frame 2 can be adjusted.
For example, when the outer wall of the support frame 2 is connected to the inner wall of the regeneration tower facing the tower top direction, one end of the first support leg 5 may be connected to the outer wall of the support frame 2, and the other end of the first support leg 5 may be connected to the inner wall of the regeneration tower facing the tower top direction.
Alternatively, referring to fig. 4, the mist trap 3 includes a wire mesh frame 32 and a wire mesh 33, and the edge of the wire mesh 33 is connected to the wire mesh frame 32 in the circumferential direction of the inner wall of the wire mesh frame 32; the second baffle 12 is connected to the bottom surface of the wire net 33, and the outer wall of the wire net frame 32 is used for connecting to the inner wall of the regeneration tower facing the tower bottom.
The wire net holder 32 is a member for fixing the wire net 33 and connecting to the inner wall of the regeneration tower. The shape and size of the wire mesh frame 32 may be preset according to the use requirement, for example, the wire mesh frame 32 may be circular. Because the regeneration tower is generally cylindric, consequently when the shape of silk screen frame 32 is circular, can guarantee that the shape of silk screen frame 32 and regeneration tower comparatively matches, so can be convenient for the outer wall of silk screen frame 32 and the inner wall of regeneration tower are connected.
The wire mesh 33 is a member for blocking the lean amine liquid and allowing the acid gas to pass therethrough. The size of the screen 33 may be preset according to the use requirement, for example, the aperture of the screen 33 ranges from 10 to 150 meshes, and for example, the aperture of the screen 33 may be 10 meshes, 50 meshes, 100 meshes, 150 meshes, or the like, which is not particularly limited in the embodiment of the present application.
It should be noted that, the connection manner between the edge of the screen 33 and the screen frame 32 along the circumferential direction of the inner wall of the screen frame 32 may be preset according to the use requirement, for example, the edge of the screen 33 may be directly welded on the screen frame 32 along the circumferential direction of the inner wall of the screen frame 32, and the edge of the screen 33 may also be adhered on the screen frame 32 along the circumferential direction of the inner wall of the screen frame 32, which is not specifically limited in the embodiment of the present invention.
For example, when the mist trap 3 is disposed, the edge of the screen 33 may be connected to the screen frame 32 along the circumferential direction of the inner wall of the screen frame 32, the second baffle 12 may be connected to the bottom surface of the screen 33, and the outer wall of the screen frame 32 may be connected to the inner wall of the regeneration tower, so that the mist trap 3 may be disposed conveniently.
Optionally, referring to fig. 5, the device further comprises a second support foot 6; one end of the second supporting leg 6 is connected with the outer wall of the wire mesh frame 32, and the other end of the second supporting leg 6 is used for being connected with the inner wall of the regeneration tower facing the tower kettle direction.
The second support leg 6 is a member for connecting the outer wall of the wire frame 32 to the inner wall of the regeneration tower in the tower bottom direction. The size and type of second supporting legs 6 may be preset according to the use requirement, for example, second supporting legs 6 may be 4, and these 4 second supporting legs 6 are uniformly connected with the outer wall of wire mesh frame 32, which is not specifically limited in the embodiment of the present application.
It should be noted that the connection mode between one end of the second supporting foot 6 and the outer wall of the wire mesh frame 32 may be preset according to the use requirement, for example, one end of the second supporting foot 6 may be welded on the outer wall of the wire mesh frame 32. One of second supporting legs 6 serves and also can be provided with the external screw thread, is provided with the through-hole on the outer wall of silk screen frame 32, is provided with the internal thread on the pore wall of this through-hole, and the one end of second supporting legs 6 can be placed in this through-hole to with this through-hole threaded connection, can dismantle between the one end of so second supporting legs 6 and the outer wall of silk screen frame 32 and be connected, and should connect convenient and fast more.
The connection mode between the other end of the second support leg 6 and the inner wall of the regeneration tower facing the tower bottom direction can be preset according to the use requirement, for example, the other end of the second support leg 6 can be welded on the inner wall of the regeneration tower facing the tower bottom direction.
It should be noted that when the difference between the total length of the second support foot 6 and the wire mesh frame 32 and the inner diameter of the regeneration tower is very small, for example, the difference is 0.01mm or 0.02mm, the second support foot 6 and the wire mesh frame 32 can be directly clamped in the regeneration tower, and the other end of the second support foot 6 can be directly contacted with the inner wall of the regeneration tower instead of being connected with the inner wall of the regeneration tower. In this way, the position of the wire frame 32 can be adjusted.
For example, when the outer wall of the wire mesh frame 32 is connected to the inner wall of the regeneration tower facing the tower bottom direction, one end of the second support leg 6 may be connected to the outer wall of the wire mesh frame 32, and the other end of the second support leg 6 may be connected to the inner wall of the regeneration tower facing the tower bottom direction.
Fig. 6 is a schematic structural diagram of a lean amine liquid regeneration system according to an embodiment of the present disclosure. Referring to fig. 6, the system includes: a condenser 7, a regeneration tower 8, a gas phase channel 9, a reboiler 10, and a corrosion control device 111 shown in fig. 1 to 5; the tower top 81 of the regeneration tower 8 is connected with the condenser 7, a first liquid inlet 821 and a second liquid inlet 822 are arranged on a first side 82 of the regeneration tower 8, the first liquid inlet 821 is used for enabling the rich amine liquid to enter the regeneration tower 8, and the second liquid inlet 822 is used for enabling the condensed liquid-phase acid water to enter the regeneration tower 8; a first liquid outlet 831 and a third liquid inlet 833 are arranged on the second side 83 of the regeneration tower 8, the first liquid outlet 831 and the third liquid inlet 833 are both connected with the top 101 of the reboiler 10, and the bottom 102 of the reboiler 10 is connected with a fourth liquid inlet 832 of the second side 83 of the regeneration tower 8; the gas-phase channel 9 and the corrosion control device 111 are both located in the regeneration tower 8, the gas-phase channel 9 is located between the corrosion control device 111 and the tower top 81 of the regeneration tower 8, and the corrosion control device 111 is opposite to the fourth liquid inlet 832.
The condenser 7 is used to condense part of H in the amine-rich liquid2S and CO2When the acid gas is condensed into gas-liquid phase mixed component from single gas phase component, the H can be conveniently treated in the later period2S and CO2And collecting the acid gas. The type of the condenser 7 may be preset according to the use requirement, for example, the condenser 7 may be an air condenser or a water-cooled condenser, and the embodiment of the present application is not particularly limited thereto.
The regeneration tower 8 is a device for thermally decomposing the rich amine liquid to produce the lean amine liquid. The type and size of the regeneration tower 8 may be preset according to the use requirement, for example, the inner diameter of the regeneration tower 8 may be 3 meters, and the like, which is not particularly limited in the embodiments of the present application.
The first side 82 of the regeneration tower 8 and the second side 83 of the regeneration tower 8 are two opposite sides of the regeneration tower 8.
Note that the first liquid inlet 821 is an inlet for introducing the rich amine liquid into the regeneration tower 8. The position and the size of the first liquid inlet 821 may be preset according to the use requirement, for example, the first liquid inlet 821 may be disposed in a position close to the top of the regeneration tower 8 in the first side 82, which is not particularly limited in the embodiment of the present application.
The second liquid inlet 822 is used for separating H from the rich amine liquid2S、CO2And a liquid-phase product formed after the acid gas is condensed, namely acid water, enters an inlet in the regeneration tower 8. The setting position and the size of the second liquid inlet 822 can be preset according to the use requirement, for example, the second liquid inlet 822 can be arranged above the first liquid inlet 821, which is not particularly limited in the embodiment of the present application.
It should be noted that the first liquid outlet 831 is used to remove the portion H2S、CO2The rich amine liquid is fed to the reboiler 10. The position and size of the first liquid outlet 831 may be preset according to a use requirement, for example, the first liquid outlet 831 may be disposed at a position near the middle of the regeneration tower 8 in the second side 83, which is not particularly limited in the embodiment of the present application.
The third liquid inlet 833 is used to introduce H in the reboiler 102S、CO2The acid gas and steam enter the regeneration tower 8. The third liquid inlet 833 can be preset in position and size according to a use requirement, for example, the first liquid outlet 831 can be arranged between the first liquid outlet 831 and the fourth liquid inlet 832, which is not limited in this embodiment of the present application.
It should be noted that the fourth liquid inlet 832 is used for feeding the semi-lean amine liquid in the reboiler 10 to the regeneration tower 8. The setting position and the size of the fourth liquid inlet 832 may be preset according to the use requirement, for example, the fourth liquid inlet 832 may be disposed in the second side 83 near the tower bottom of the regeneration tower 8, which is not specifically limited in the embodiment of the present application.
It should be noted that the gas phase channel 9 is used to ensure that the acid gas separated from the semi-lean amine liquid can normally rise to the top 81 of the regeneration tower 8, and further ensure that the acid gas separated from the semi-lean amine liquid and the lean amine liquid can be sufficiently separated. The number and type of the gas phase channels 9 may be preset according to the use requirement, for example, the gas phase channels 9 may be gas lift cylinders, and the number of the gas lift cylinders may be 2, which is not particularly limited in the embodiments of the present application.
When the gas phase channel 9 is located in the regeneration tower 8, a support plate may be disposed in the regeneration tower 8, and an edge portion of the support plate is connected to an inner wall of the regeneration tower 8 in a circumferential direction. The support plate is provided with a through hole, the gas phase channel 9 can be welded on the support plate, and the through hole on the support plate is opposite to the gas phase channel 9, so that the fixation of the gas phase channel 9 in the regeneration tower 8 can be realized.
It should be noted that the reboiler 10 is used to provide a heat source for the semi-lean amine liquid to ensure that the semi-lean amine liquid can be sufficiently separated into the acid gas and the lean amine liquid. The material and size of the reboiler 10 may be preset according to the use requirement, as long as the semi-lean amine liquid can be separated into the acid gas and the lean amine liquid in the reboiler 10, which is not particularly limited in the embodiment of the present application.
It is noted that the temperature provided by the reboiler 10 may be preset according to the use requirement, for example, the semi-lean amine liquid may be heated to 130 ℃ by the reboiler 10.
The corrosion control device 111 is used to reduce the flow rates of the lean amine liquid and the acid gas and change the flow pattern of the lean amine liquid. The position of the corrosion control device 111 may be preset according to the use requirement, as long as the position of the third liquid inlet 833 and the position of the fourth liquid inlet 832 are both opposite to the corrosion control device 111, which is not specifically limited in this embodiment of the present application.
Illustratively, when the lean amine liquid regeneration system is used for separating rich amine liquid, H is absorbed2S、CO2The MDEA amine-rich liquid enters the regeneration tower 8 through the first inlet port 821 on the first side 82 of the regeneration tower 8, and then the MDEA amine-rich liquid is separated into a part H2S、CO2And (4) waiting for acid gas and semi-lean amine liquid. Separated part H2S、CO2The acid gas enters the condenser 7 from the tower top 81 of the regeneration tower 8, and then part of the acid gas H2S、CO2When the acid gas is condensed, the single gas-phase component is changed into a gas-liquid mixed phase component, then the gas-phase component, namely the acid gas, is discharged, and the liquid-phase component, namely the acid water, is returned into the regeneration tower 8 through the second liquid inlet 822 to be separated again. The separated semi-lean amine liquid enters a reboiler 10 through a first liquid outlet 831 arranged on a second side 83 of the regeneration tower 8, the semi-lean amine liquid is heated to 130 ℃ in the reboiler, and the semi-lean amine liquid is separated into lean amine liquid and H-containing liquid2S、CO2And the like. The lean amine solution will then enter the regeneration tower 8 through a fourth liquid inlet 832 arranged on the second side 83 of the regeneration tower 8, and the lean amine solution will contain H2S、CO2The acid gas is introduced into the regeneration tower 8 through a third liquid inlet 833 provided at the second side 83 of the regeneration tower 8. Then lean amine liquid and containing H2S、CO2Etc. of acid gas, containing H, may impinge on the corrosion control device 1112S、CO2The acid gas enters the upper part of the regeneration tower 8 through the gas phase channel 9, and is finally discharged from the top position of the regeneration tower 8, and the lean amine liquid is discharged from the bottom position of the regeneration tower 8.
By adopting the lean amine liquid regeneration system provided by the embodiment of the application to carry out thermal decomposition on the rich amine liquid, the flow speed of the lean amine liquid flowing into the regeneration tower 8 can be slowed down, and the flow direction of the lean amine liquid flowing into the regeneration tower 8 can be adjusted, so that the scouring corrosion of the lean amine liquid to the tower wall, a gas phase channel and other parts can be reduced, and the service life of the lean amine liquid regeneration system can be prolonged.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A corrosion control device, comprising: a plurality of baffle plates (1), a support frame (2) and a mist catcher (3);
wherein the plurality of baffle plates (1) comprise a plurality of first baffle plates (11) and a plurality of second baffle plates (12);
a first end of each first baffle plate (11) is connected with the surface (21) of the support frame (2), a first end of each second baffle plate (12) is connected with the surface (31) of the mist catcher (3), and a second end of each first baffle plate (11) is opposite to and spaced from a second end of each second baffle plate (12);
the outer wall of the support frame (2) is used for being connected with the inner wall of the regeneration tower facing the direction of the tower top;
the outer wall of the mist catcher (3) is used for being connected with the inner wall of the regeneration tower facing the tower kettle direction.
2. The device according to claim 1, characterized in that it further comprises a first support foot (5);
one end of the first supporting leg (5) is connected with the outer wall of the supporting frame (2), and the other end of the first supporting leg (5) is connected with the inner wall of the regeneration tower towards the direction of the top of the tower.
3. The device according to claim 1, characterized in that the mist trap (3) comprises a wire mesh support (32) and a wire mesh (33), the edge of the wire mesh (33) being connected to the wire mesh support (32) in the circumferential direction of the inner wall of the wire mesh support (32);
the second baffle (12) with the bottom surface of silk screen (33) is connected, the outer wall of silk screen frame (32) be used for with the inner wall connection of regeneration tower towards the tower cauldron direction.
4. A device according to claim 3, characterized in that the device further comprises a second support foot (6);
one end of the second supporting leg (6) is connected with the outer wall of the wire net rack (32), and the other end of the second supporting leg (6) is connected with the inner wall of the regeneration tower towards the tower kettle direction.
5. The apparatus according to claim 3, wherein the mesh (33) has a mesh size in the range of 10 to 150 mesh.
6. The device according to claim 1, characterized in that the projected area of the first baffle plate (11) on the second baffle plate (12) is 0-80% of the second baffle plate.
7. The device according to claim 1, characterized in that the first baffle plate (11) and the second baffle plate (12) are provided with deflector holes (4).
8. The device according to claim 7, characterized in that the diameter of the flow-guiding holes (4) is 0.5-10.0 mm (mm).
9. The apparatus according to claim 1, wherein the number of the plurality of baffles (1) is 2 to 5.
10. A lean amine liquid regeneration system, comprising: a condenser (7), a regeneration column (8), a gas phase channel (9), a reboiler (10) and a corrosion control device (111) according to any of claims 1 to 9;
the tower top (81) of the regeneration tower (8) is connected with the condenser (7), a first liquid inlet (821) is formed in a first side edge (82) of the regeneration tower (8), and the first liquid inlet (821) is used for enabling the rich amine liquid to enter the regeneration tower (8);
a first liquid outlet (831) is arranged at the second side (83) of the regeneration tower (8), the first liquid outlet (831) is connected with the top (101) of the reboiler (10), and the bottom (102) of the reboiler (10) is connected with a fourth liquid inlet (832) at the second side (83) of the regeneration tower (8);
the gas phase channel (9) and the corrosion control device (111) are both located in the regeneration tower (8), the gas phase channel (9) is located between the corrosion control device (111) and the tower top (81) of the regeneration tower (8), and the corrosion control device (111) is opposite to the fourth liquid inlet (832).
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Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6960301B2 (en) * | 2002-03-15 | 2005-11-01 | New Earth Systems, Inc. | Leachate and wastewater remediation system |
| CN201313027Y (en) * | 2008-10-28 | 2009-09-23 | 青岛瑞德新能源工程技术有限公司 | A hood-type desulfurization tank |
| JP5232746B2 (en) * | 2009-09-15 | 2013-07-10 | 三菱重工業株式会社 | Rectifier, CO2 recovery device |
| CN202028322U (en) * | 2010-12-31 | 2011-11-09 | 徐州金宏二氧化碳科技开发有限公司 | Device for recovering carbon dioxide in flue gas |
| CN102847422B (en) * | 2011-07-22 | 2015-06-17 | 上海克硫环保科技股份有限公司 | Apparatus for desulfurizing smoke through ammonia process |
| CN107335415A (en) * | 2016-05-03 | 2017-11-10 | 孙小平 | A kind of activated coke regenerator |
| CN205613575U (en) * | 2016-05-09 | 2016-10-05 | 福建龙净环保股份有限公司 | Wet -type electrostatic precipitator with flue gas degree of depth desulfurization function |
| CN206231002U (en) * | 2016-11-28 | 2017-06-09 | 江苏昇茂木业有限公司 | A kind of corrosion-resistant Environment-friendlycomposite composite board of high intensity shock-absorbing type waterproof and heat-insulating |
| CN206587502U (en) * | 2017-02-27 | 2017-10-27 | 山东科技大学 | A kind of desulfuration absorbing tower infolding spiral board combined type demister |
| CN116603368A (en) * | 2017-09-22 | 2023-08-18 | 江苏新世纪江南环保股份有限公司 | Method for applying ultra-clean ammonia desulfurization technology to carbon capture process |
| CN208177248U (en) * | 2018-04-04 | 2018-12-04 | 南京泽众环保科技有限公司 | It is a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration |
| CN209005399U (en) * | 2018-08-15 | 2019-06-21 | 广东绿茵环保科技有限公司 | A kind of tube bank demister of adjustable flue gas flow rate |
| CN109142205A (en) * | 2018-09-11 | 2019-01-04 | 长江大学 | Gas well takes liquid and takes sand erosion-corrosion experiment device |
| CN110628479A (en) * | 2019-09-26 | 2019-12-31 | 江苏城乡建设职业学院 | Energy-saving method and system for deep decarburization of natural gas |
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2020
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