Skid-mounted device for amine liquid purification

Abstract

The utility model discloses a skid-mounted device for amine liquid purification, and relates to the technical field of amine liquid purification treatment equipment, in particular to the skid-mounted device for amine liquid purification, which comprises a skid-mounted seat, a three-stage filtering component and a shallow bed system, the skid-mounted base, the three-stage filtering component and the shallow bed system are arranged in a matched mode, large-particle impurities and suspended solids in amine liquid are filtered through the first filter, organic matter, oil dirt and other impurities in the amine liquid are adsorbed through the second filter, trace suspended solids and small impurities in the amine liquid are removed through the third filter, and therefore the purity of the amine liquid is ensured. According to the shallow bed system, amine liquid is deeply purified through a resin material, heat-stable salt and other impurities which are difficult to remove through a conventional filtering method in the amine liquid can be removed, the resin material can be regenerated in an alkali liquor soaking and flushing mode, and the purifying capacity of the resin material is recovered.

Description

Technical Field

[0001] The utility model relates to the technical field of amine liquid purification treatment equipment, in particular to a skid-mounted device for amine liquid purification. Background Technique

[0002] In petrochemical refineries, sulfur recovery and other processes, amine liquid is often used to absorb acidic gases such as hydrogen sulfide and carbon dioxide. Amine liquid is a general term for a class of organic base solutions, which has weak alkalinity and is mainly used in chemical industries such as petroleum, natural gas, coal chemical industry, and synthetic ammonia. In the process of amine desulfurization, due to reasons such as degradation and material introduction, a certain amount of anions will accumulate in the system. These anions combine with organic amines to form heat-stable salts (HSS). These heat-stable salts not only do not have the ability to adsorb acid gas, but may also corrode equipment, cause pipeline blockage, amine liquid foaming and other problems, seriously affecting the absorption performance of the solvent and the stable operation of the system. Therefore, in order to maintain the effectiveness of amine liquid and extend the service life of equipment, it is necessary to purify amine liquid.

[0003] In the publicly disclosed Chinese patent application, the publication number: CN207943953U, the patent name: Container-type amine liquid purification device. Although this prior art can realize the purification treatment of amine liquid through the coordinated setting of components such as a shallow regeneration resin bed, an alkali tank, and an amine-containing water tank; however, this prior art has certain limitations in the specific implementation process. In the specific implementation of this prior art, a container is used to hold each component, that is, components such as a shallow regeneration resin bed, an alkali tank, and an amine-containing water tank are fixedly installed inside the container with a limited space. The internal space of the container is narrow, which is not convenient for workers to perform maintenance operations on components such as a shallow regeneration resin bed, an alkali tank, and an amine-containing water tank inside the container. Summary of the Utility Model

[0004] (1) Technical Problem to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a skid-mounted device for amine liquid purification, which solves the problems put forward in the above background technique.

[0006] (2) Technical Solution

[0007] To achieve the above objectives, the present utility model is realized through the following technical solutions: A skid-mounted device for amine liquid purification, comprising a skid base, a three-stage filtration component, and a shallow bed system; the skid base is welded into a square-shaped frame structure using multiple I-beams, and multiple support beams arranged in sequence along the length side are welded inside the frame structure. A bottom plate is welded on the upper surface of the frame structure, and both the three-stage filtration component and the shallow bed system are integrally and fixedly installed on the bottom plate; the three-stage filtration component includes a lean amine liquid inlet pipe, a first filter, a second filter, and a third filter. The first filter, the second filter, and the third filter are fixedly installed in sequence through the lean amine liquid inlet pipe, and the first filter, the second filter, and the third filter are connected in sequence through the lean amine liquid inlet pipe; both the first filter and the third filter are large-flow precision filters, and the second filter is an activated carbon packing filter; the shallow bed system includes a resin bed, a desalinated water pipe, a washing waste water pipe, an amine liquid discharge pipe, and a regeneration waste liquid pipe; the medium outflow end of the desalinated water pipe is fixedly installed and connected to the first port of the resin bed, the medium inflow end of the regeneration waste liquid pipe is fixedly installed and connected to the first port of the resin bed, and the second port of the resin bed is respectively connected to the medium inflow ends of the washing waste water pipe and the amine liquid discharge pipe; the medium outflow end of the lean amine liquid inlet pipe is fixedly installed and connected to the medium inflow end of the resin bed.

[0008] Optionally, a positive pressure explosion-proof cabinet is fixedly installed on the skid base.

[0009] Optionally, safety valves are respectively fixedly installed at one ends of the washing waste water pipe, the amine liquid discharge pipe, and the regeneration waste liquid pipe close to the resin bed.

[0010] Optionally, the shallow bed system further includes a nitrogen gas pipe, a sodium hydroxide solution pipe, a alkali preparation tank, an amine-containing water tank, and an alkali-containing water tank; the medium outflow end of the nitrogen gas pipe is fixedly installed and connected to the medium inflow end of the alkali preparation tank, and the medium outflow end of the alkali preparation tank is fixedly installed and connected to the second port of the resin bed; the medium outflow end of the sodium hydroxide solution pipe is fixedly installed and connected to the medium inflow end of the alkali preparation tank.

[0011] Optionally, the medium outflow end of the nitrogen gas pipe is fixedly installed and connected to a first pipe, and the medium outflow end of the first pipe is respectively connected to the medium inflow ends of the amine-containing water tank and the alkali-containing water tank.

[0012] Optionally, the medium outflow end of the amine-containing water tank is fixedly installed and connected to the first port of the resin bed, and the medium outflow end of the alkali-containing water tank is fixedly installed and connected to the first port of the resin bed.

[0013] Optionally, the medium outflow end of the amine-containing water tank is communicated with the second port of the resin bed through a second pipeline, and the medium outflow end of the alkali-containing water tank is also communicated with the second port of the resin bed through the second pipeline.

[0014] Optionally, the three-stage filtering component further includes a filter blowdown pipe, and the medium inflow ends of the filter blowdown pipe are respectively communicated with the first filter, the second filter, and the third filter.

[0015] (III) Beneficial effects

[0016] The utility model provides a skid-mounted device for amine liquid purification, which has the following beneficial effects:

[0017] 1. The skid-mounted device for amine liquid purification, through the combined setting of the skid base, the three-stage filtering component, and the shallow bed system, enables the skid-mounted device for amine liquid purification to have the effect of facilitating maintenance by the staff. By integrally and fixedly installing the three-stage filtering component and the shallow bed system on the skid base, and using the skid base to carry the three-stage filtering component and the shallow bed system, that is, multiple functional units are integrated on a skid-mounted base, the overall floor area is small, which is convenient for installation and movement. Compared with the prior art, there is no limitation on the space range by the surrounding baffles and the top plate, and it is convenient for the staff to maintain each functional unit.

[0018] 2. The skid-mounted device for amine liquid purification, through the combined setting of the skid base, the three-stage filtering component, and the shallow bed system, filters large particle impurities and suspended matters in the amine liquid through the first filter, adsorbs organic matters, oil stains and other impurities in the amine liquid through the second filter, and removes trace suspended matters and fine impurities in the amine liquid through the third filter, thereby ensuring the purity of the amine liquid. The shallow bed system deeply purifies the amine liquid through the resin material, and can remove impurities such as heat-stable salts in the amine liquid that are difficult to remove by conventional filtering methods. The resin material can be regenerated by soaking and flushing with alkali solution to restore its purification ability. Description of the drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a skid-mounted device for amine liquid purification of the present utility model;

[0021] Figure 2Schematic diagram of the pipeline connection structure of a skid-mounted device for amine liquid purification according to the present utility model;

[0022] Figure 3 Schematic diagram of the pipeline connection structure of the three-stage filtration component in a skid-mounted device for amine liquid purification according to the present utility model;

[0023] Figure 4 Schematic diagram of the pipeline connection structure of the desalting water pipe in a skid-mounted device for amine liquid purification according to the present utility model;

[0024] Figure 5 Schematic diagram of the pipeline connection structure of the flushing wastewater pipe in a skid-mounted device for amine liquid purification according to the present utility model;

[0025] Figure 6 Schematic diagram of the structure in a skid-mounted device for amine liquid purification according to the present utility model.

[0026] In the figure: 1. First filter; 2. Second filter; 3. Third filter; 4. Lean amine liquid inflow pipe; 5. Filter blowdown pipe; 6. First temperature transmitter; 7. Positive pressure explosion-proof cabinet; 8. Desalting water pipe; 9. Second temperature transmitter; 10. Regenerated waste liquid pipe; 11. Flushing wastewater pipe; 12. Amine liquid discharge pipe; 13. Nitrogen gas pipe; 14. Sodium hydroxide solution pipe; 15. First pipeline; 16. Alkali preparation tank; 17. Amine-containing water tank; 18. Alkali-containing water tank; 19. Resin bed; 20. Skid base; 21. Second pipeline. Detailed implementation manners

[0027] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. In the description of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0029] Please refer to Figures 1 to 6 , the present utility model provides a technical solution: a skid-mounted device for amine liquid purification, including a skid base 20, a three-stage filtration component, and a shallow bed system. The skid base 20 is welded into a square frame structure by a plurality of I-beams, and a plurality of support beams arranged in sequence along the length side are welded inside the frame structure. A bottom plate is welded on the upper surface of the frame structure, and the three-stage filtration component and the shallow bed system are both integrally and fixedly installed on the bottom plate.

[0030] Among them, the skid base 20 is used to carry the three-stage filtration component and the shallow bed system. The three-stage filtration component and the shallow bed system are integrally and fixedly installed on the skid base 20, which is convenient for mobile transportation. The frame structure, the bottom plate, and the plurality of support beams together form an integral structure, which has a certain strength as a whole and is relatively stable.

[0031] The three-stage filtration component includes a lean amine liquid inlet pipe 4, a first filter 1, a second filter 2, and a third filter 3. The first filter 1, the second filter 2, and the third filter 3 are fixedly installed in sequence through the lean amine liquid inlet pipe 4, and the first filter 1, the second filter 2, and the third filter 3 are communicated in sequence through the lean amine liquid inlet pipe 4. Both the first filter 1 and the third filter 3 adopt large-flow precision filters, and the second filter 2 adopts an activated carbon packing filter.

[0032] Among them, the three-stage filtration component is used to transport the lean amine liquid and filter and purify the lean amine liquid. The lean amine liquid flows through the first filter 1, the second filter 2, and the third filter 3 in sequence through the lean amine liquid inlet pipe 4. Among them, the first filter 1 is used to filter large particle impurities, suspended matters, etc. in the lean amine liquid, the second filter 2 is used to adsorb and filter impurities such as organic matters and oil stains in the amine liquid, and the third filter 3 is used to filter and remove trace suspended matters and fine impurities in the amine liquid, so as to ensure the purity of the amine liquid.

[0033] The shallow bed system includes a resin bed 19, a desalted water pipe 8, a flushing waste water pipe 11, an amine liquid discharge pipe 12, and a regeneration waste liquid pipe 10. The medium outflow end of the desalted water pipe 8 is fixedly installed and communicated with the first port of the resin bed 19 (referring to the port at one of the medium inflow or outflow ends of the resin bed 19). The medium inflow end of the regeneration waste liquid pipe 10 is fixedly installed and communicated with the first port of the resin bed 19. The second port of the resin bed 19 (referring to the other medium inflow or outflow end of the resin bed 19) is respectively communicated with the medium inflow ends of the flushing waste water pipe 11 and the amine liquid discharge pipe 12.

[0034] Among them, control valves are fixedly installed at both ports of the resin bed 19. The desalted water pipe 8 is used to convey desalted water to the side where the resin bed 19 is located. The flushing waste water pipe 11 is used to discharge flushing waste water. The amine liquid discharge pipe 12 is used to discharge the purified amine liquid. The regeneration waste liquid pipe 10 is used to discharge regeneration waste liquid. A second temperature transmitter 9 is provided on the desalted water pipe 8.

[0035] The medium outflow end of the lean amine liquid inlet pipe 4 is fixedly installed and communicated with the medium inflow end of the resin bed 19.

[0036] Among them, the lean amine liquid inlet pipe 4 is used to convey amine liquid to the resin bed 19. A first temperature transmitter 6 is provided on the lean amine liquid inlet pipe 4.

[0037] Specifically, a positive pressure explosion-proof cabinet 7 is fixedly installed on the skid base 20.

[0038] Specifically, safety valves are respectively fixedly installed at one ends of the flushing waste water pipe 11, the amine liquid discharge pipe 12, and the regeneration waste liquid pipe 10 close to the resin bed 19.

[0039] Specifically, the shallow bed system further includes a nitrogen gas pipe 13, a sodium hydroxide solution pipe 14, a caustic soda preparation tank 16, an amine-containing water tank 17, and an alkali-containing water tank 18. The medium outflow end of the nitrogen gas pipe 13 is fixedly installed and communicated with the medium inflow end of the caustic soda preparation tank 16. The medium outflow end of the caustic soda preparation tank 16 is fixedly installed and communicated with the second port of the resin bed 19. The medium outflow end of the sodium hydroxide solution pipe 14 is fixedly installed and communicated with the medium inflow end of the caustic soda preparation tank 16.

[0040] Among them, a pressure gauge is provided on the nitrogen gas pipe 13, and a safety valve is also provided at the end of the nitrogen gas pipe 13 close to the caustic soda preparation tank 16. Safety valves and pressure gauges are provided on the sodium hydroxide solution pipe 14. A safety valve is provided at the medium outflow end of the caustic soda preparation tank 16.

[0041] Further specifically, the medium outflow end of the nitrogen gas pipe 13 is fixedly installed with a first pipe 15 and they are communicated. The medium outflow end of the first pipe 15 is respectively communicated with the medium inflow ends of the amine-containing water tank 17 and the alkali-containing water tank 18.

[0042] Among them, the first pipeline 15 has a medium inlet end and two medium outlet ends, and safety valves are provided at both medium outlet ends of the first pipeline 15.

[0043] More specifically, the medium outlet end of the amine-containing water tank 17 is fixedly installed and communicated with the first port of the resin bed 19, and the medium outlet end of the alkali-containing water tank 18 is fixedly installed and communicated with the first port of the resin bed 19.

[0044] Among them, at least two safety valves are provided at the medium outlet ends of the amine-containing water tank 17 and the alkali-containing water tank 18.

[0045] More specifically, the medium outlet end of the amine-containing water tank 17 is communicated with the second port of the resin bed 19 through the second pipeline 21, and the medium outlet end of the alkali-containing water tank 18 is also communicated with the second port of the resin bed 19 through the second pipeline 21.

[0046] Among them, a safety valve is also provided on the second pipeline 21.

[0047] Specifically, the three-stage filtering component further includes a filter blowdown pipe 5, and the medium inlet end of the filter blowdown pipe 5 is respectively communicated with the first filter 1, the second filter 2, and the third filter 3.

[0048] Among them, the filter blowdown pipe 5 is used to convey and discharge the dirt in the first filter 1, the second filter 2, and the third filter 3.

[0049] Amine liquid purification operation steps: First, alkali solution displaces water: Nitrogen in the nitrogen pipe 13 flows into the alkali preparation tank 16, and the nitrogen presses the alkali solution out of the alkali preparation tank 16. When passing through the resin bed 19, the water remaining in the resin bed 19 is pressed back into the alkali-containing water tank 18, and the liquid level of the alkali preparation tank 16 is controlled;

[0050] Second, resin regeneration: Nitrogen presses the alkali solution in the alkali preparation tank 16 out and enters the resin bed 19 to regenerate the resin. The regenerated waste alkali solution is discharged, and the liquid level of the alkali preparation tank 16 is controlled;

[0051] Third, alkali solution recovery: Nitrogen presses the water in the alkali-containing water tank 18 out and enters the resin bed 19 to push the alkali solution remaining in the resin bed 19 back into the alkali preparation tank 16, and the liquid level of the alkali preparation tank 16 is controlled;

[0052] Fourth, regeneration flushing: Nitrogen presses the excess water in the alkali-containing water tank 18 out, passes through the resin bed 19, and presses out the remaining alkali solution, which is discharged as flushing wastewater; the liquid level of the alkali-containing water tank 18 is controlled;

[0053] Fifth, pipeline flushing: The demineralized water pipe 8 conveys demineralized water to the side where the resin bed 19 is located. The demineralized water flushes the pipeline, and the wastewater is discharged, which is controlled by a flow meter;

[0054] VI. Regenerative Deep Flushing: Demineralized water further flushes the resin bed 19, and wastewater is discharged; flowmeter control;

[0055] VII. Water Make-up for the Alkaline Water Tank 18: Demineralized water flows into the alkaline water tank 18 through the resin bed 19 and the second pipeline 21; the liquid level of the alkaline water tank 18 is controlled.

[0056] VIII. Amine Solution Displacement of Water: The amine solution feed filtered successively through the first filter 1, the second filter 2, and the third filter 3 passes through the resin bed 19, and the residual water pressure in the resin bed 19 is pressed out and into the alkaline water tank 18, and the liquid level of the alkaline water tank 18 is controlled.

[0057] IX. Amine Solution Purification: The amine solution passes through the resin bed 19 to remove the internal heat-stable salts. Flowmeter control.

[0058] X. Purification and Recovery: The water in the amine-containing water tank 17 pushes the amine solution in the resin bed 19 back into the system. The liquid level of the amine-containing water tank 17 is controlled.

[0059] XI. Purification Flushing: Demineralized water pushes the residual amine solution in the resin bed 19 back into the amine-containing water tank 17. The liquid level of the amine-containing water tank 17 is controlled.

[0060] XII. Purification Deep Flushing: Demineralized water further flushes the resin bed 19, and wastewater is discharged (or flushed into the system). Flowmeter control.

[0061] XIII. Adding Alkali (This step starts from the fourth step). The configured alkali solution in the alkali preparation tank 16 is used to regenerate the resin in the resin bed 19. The liquid level of the alkali tank is controlled.

[0062] Through the above process flow, the heat-stable salts, solid particles, oil substances, various hydrocarbon substances, and some degradation products in the amine solution solvent can be removed, achieving the effect of purifying the amine solution. At the same time, this set of combined equipment is placed on the skid 20 for convenient operation and maintenance, improving the work efficiency of service personnel.

[0063] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A skid-mounted device for amine liquid purification, characterized in that: It comprises a skid seat (20), a three-stage filter component and a shallow bed system; the skid seat (20) is formed by welding a plurality of I-beams into a U-shaped frame structure, and a plurality of support beams arranged in sequence along the length side are welded inside the frame structure, a bottom plate is welded on the upper surface of the frame structure, and the three-stage filter component and the shallow bed system are integrated and fixedly mounted on the bottom plate; The three-stage filtering component comprises a lean amine liquid inflow pipe (4), a first filter (1), a second filter (2), and a third filter (3); the first filter (1), the second filter (2), and the third filter (3) are fixedly installed in sequence through the lean amine liquid inflow pipe (4), and the first filter (1), the second filter (2), and the third filter (3) are connected in sequence through the lean amine liquid inflow pipe (4); the first filter (1) and the third filter (3) are both large-flow precision filters, and the second filter (2) is an activated carbon filler filter; The shallow bed system comprises a resin bed (19), a deionized water pipe (8), a leaching waste water pipe (11), an amine liquid discharge pipe (12), and a regeneration waste liquid pipe (10); the medium outflow end of the deionized water pipe (8) is fixedly installed with a first port of the resin bed (19) and the two are in communication, the medium inflow end of the regeneration waste liquid pipe (10) is fixedly installed with a first port of the resin bed (19) and the two are in communication, and the second port of the resin bed (19) is respectively in communication with the medium inflow ends of the leaching waste water pipe (11) and the amine liquid discharge pipe (12); The medium outflow end of the lean amine liquid inflow pipe (4) is fixedly installed with the medium inflow end of the resin bed (19), and the two are in communication.

2. A skid-mounted device for amine liquid purification according to claim 1, characterized in that: Safety valves are fixedly installed at one end of the elution waste water pipe (11), the amine liquid discharge pipe (12), and the regeneration waste liquid pipe (10) close to the resin bed (19).

3. A skid-mounted device for amine liquid purification according to claim 1, characterized in that: The shallow bed system further comprises a nitrogen pipe (13), a sodium hydroxide solution pipe (14), an alkali preparation tank (16), an amine-containing water tank (17), and an alkali-containing water tank (18); the medium outflow end of the nitrogen pipe (13) is fixedly installed with the medium inflow end of the alkali preparation tank (16) and the two are in communication; the medium outflow end of the alkali preparation tank (16) is fixedly installed with the second port of the resin bed (19) and the two are in communication; the medium outflow end of the sodium hydroxide solution pipe (14) is fixedly installed with the medium inflow end of the alkali preparation tank (16) and the two are in communication.

4. A skid-mounted device for amine liquid purification according to claim 3, characterized in that: A first pipeline (15) is fixedly mounted on the medium outflow end of the nitrogen pipe (13) and the two are in communication, and the medium outflow end of the first pipeline (15) is in communication with the medium inflow ends of the amine-containing water tank (17) and the alkali-containing water tank (18), respectively.

5. A skid-mounted device for amine liquid purification according to claim 4, characterized in that: The medium outflow end of the amine-containing water tank (17) is fixedly installed with the first port of the resin bed (19) and the two are in communication, and the medium outflow end of the alkali-containing water tank (18) is fixedly installed with the first port of the resin bed (19) and the two are in communication.

6. A skid-mounted device for amine liquid purification according to claim 4, characterized in that: The medium outflow end of the amine-containing water tank (17) is connected to the second port of the resin bed (19) through a second pipe (21), and the medium outflow end of the alkali-containing water tank (18) is also connected to the second port of the resin bed (19) through a second pipe (21).

7. The skid-mounted device for amine liquid purification according to claim 1, characterized in that: The three-stage filter component further comprises a filter drain pipe (5), and the medium inflow end of the filter drain pipe (5) is respectively connected to the first filter (1), the second filter (2), and the third filter (3).

Images