Amine liquid purification system

Abstract

The present invention discloses an amine liquid purification system, which relates to the technical field of amine liquid purification, and comprises: an absorption tower, a rich amine liquid flash tank, a rich amine liquid oil-water separator, a rich amine liquid solid particle filter, a lean-rich liquid heat exchanger, a rich amine liquid regeneration tower, a tower top condenser, a reboiler, a lean amine liquid cooler, a lean amine liquid circulation pump, a first mechanical filter, an activated carbon filter, and a second mechanical filter. The present invention sets an oil-water separator in series with an amine liquid solid particle filter in a rich amine liquid section that is prone to produce oil and solid particles. The oil-water separator separates oil and large solid particles in the rich amine liquid, and the separated particles are sent to a dirty oil collector together with the dirty oil for external discharge treatment. The preliminarily purified rich amine liquid is further filtered out with smaller solid particles through a solid particle filter, and then sent to an amine liquid regeneration tower for regeneration treatment.

Description

Technical Field

[0001] The invention relates to the technical field of amine liquid purification, and in particular to an amine liquid purification system. Background Art

[0002] Because natural gas contains CO 2 / H 2 Acidic gases such as S can cause pipeline corrosion, reduced calorific value, or freezing of natural gas liquefaction, etc. Therefore, CO2 must be removed before natural gas pipeline transportation or liquefaction. 2 / H 2 S and other acidic gases are removed to below the allowable content. At present, the gas field gas, associated gas, and coalbed methane purification devices mainly use the active amine liquid absorption method to remove CO contained in the raw gas. 2 ,H 2 S and other impurity components.

[0003] The active amine liquid absorption method is a deacidification method based on a reversible chemical reaction and using an alkaline solvent as an absorbent. The solvent reacts with the acid gas component in the raw gas to generate compounds; the rich liquid that absorbs the acid gas can decompose and release the acid gas under the conditions of increasing temperature and reducing pressure, thereby realizing the regeneration of the solvent. The solvents used in the active amine liquid absorption method are generally alkanolamines, mainly monoethanolamine (MEA), diethanolamine (DEA), diisopropanolamine (DIPA), N-methyldiethanolamine (MDEA), etc., so it is usually also called the amine method. Among them, N-methyldiethanolamine (abbreviated as: MDEA) has become a commonly used desulfurization and decarbonization absorbent at home and abroad due to its stable performance and low regeneration energy consumption.

[0004] During the use of amine liquid, some impurities such as hydrocarbons, degradation products, suspended solids and thermally stable salts will accumulate. The presence of these impurities will cause the amine liquid to foam, which will increase the heat required for amine liquid regeneration and consume amine liquid, causing blockage of equipment and pipelines, accelerating equipment pipeline corrosion, and seriously affecting the normal operation of the entire device. In order to solve the problem of amine liquid foaming, the amine liquid system needs to be purified in real time.

[0005] The existing deacidification system amine liquid purification system filters and purifies the amine liquid by installing an amine liquid purification device on the rich amine liquid pipeline after the acid gas adsorption or on the lean amine liquid pipeline after regeneration. The main treatment method is to set up two-stage physical filtration and one-stage activated carbon adsorption to remove it. The main disadvantage is that oil and solid particulate matter are difficult to remove completely by physical adsorption, and the filler in the filter is frequently replaced, which increases the labor replacement cost and filler replenishment cost. Summary of the invention

[0006] One object of the present invention is to provide an amine liquid purification system, a feature of which is that in the technical scheme, an oil-water separator is arranged in series with an amine liquid solid particle filter in a rich amine liquid section that is prone to produce oil and solid particles. The oil-water separator separates oil and large solid particles in the rich amine liquid, and the separated particles are sent to a waste oil collector together with the waste oil for external discharge treatment. The initially purified rich amine liquid is further filtered out with smaller solid particles through the solid particle filter, and then sent to an amine liquid regeneration tower for regeneration treatment.

[0007] In order to achieve the above-mentioned purpose, the present invention proposes an amine liquid purification system, which comprises: an absorption tower, a rich amine liquid flash tank, a rich amine liquid oil-water separator, a rich amine liquid solid particle filter, a lean-rich liquid heat exchanger, a rich amine liquid regeneration tower, a tower top condenser, a reboiler, a lean amine liquid cooler, a lean amine liquid circulation pump, a first mechanical filter, an activated carbon filter, and a second mechanical filter; the rich amine liquid outlet of the absorption tower is connected to the inlet of the rich amine liquid flash tank through a first pipeline, the outlet of the rich amine liquid flash tank is connected to the inlet of the rich amine liquid oil-water separator through a second pipeline, the outlet of the rich amine liquid oil-water separator is connected to the inlet of the rich amine liquid solid particle filter through a third pipeline, the outlet of the rich amine liquid solid particle filter is connected to the inlet of the lean-rich liquid heat exchanger through a fourth pipeline, the first outlet of the lean-rich liquid heat exchanger is connected to the first inlet of the rich amine regeneration tower through a fifth pipeline, and the first outlet of the rich amine regeneration tower is connected to the first inlet of the rich amine regeneration tower. The outlet of the tower top condenser is connected with the inlet of the tower top condenser through a sixth pipeline, the liquid phase outlet of the tower top condenser is connected with the inlet of the rich amine liquid regeneration tower through a seventh pipeline, the outlet of the rich amine liquid regeneration tower is connected with the inlet of the reboiler through an eighth pipeline, the gas phase outlet of the reboiler is connected with the inlet of the rich amine liquid regeneration tower through a ninth pipeline, the liquid phase outlet of the reboiler is connected with the inlet of the lean-rich liquid heat exchanger through a tenth pipeline, the outlet of the lean-rich liquid heat exchanger is connected with the inlet of the lean amine liquid cooler through an eleventh pipeline, the outlet of the lean amine liquid cooler is connected with the inlet of the amine liquid circulation pump through a twelfth pipeline, the outlet of the amine liquid circulation pump is connected with the inlet of the absorption tower through a thirteenth pipeline, the absorption tower is connected to the first mechanical filter through a fourteenth pipeline, the first mechanical filter is connected to the activated carbon filter through a fifteenth pipeline, and the activated carbon filter is connected to the second mechanical filter through a sixteenth pipeline.

[0008] Furthermore, the amine-rich liquid solid particle filtering device includes a tank body, a mounting base is provided at the bottom end of the tank body, a circulation mechanism for a movable filtering component is provided inside the tank body, conveying mechanisms for conveying amine liquid are extended from both sides of the circulation mechanism, a switch mechanism for opening and closing a valve by detecting liquid pressure is installed on the conveying mechanism, a cleaning mechanism for assisting in cleaning dirt and scale is connected to the conveying mechanism, and the circulation mechanism and the cleaning mechanism are driven to operate synchronously by a synchronization mechanism.

[0009] Furthermore, the circulation mechanism includes a first sealing disk and a second sealing disk, the first sealing disk and the second sealing disk are provided inside the tank body, an equal number of connecting bolts are provided on opposite sides of the first sealing disk and the second sealing disk, a closed space is formed between the first sealing disk and the second sealing disk through the connecting bolts, and a first rotating shaft is rotatably connected between the first sealing disk and the second sealing disk, a filter plate is fixedly connected to the first rotating shaft, and the filter plate is located between the first sealing disk and the second sealing disk.

[0010] Furthermore, the circulation mechanism also includes a reducer, a reducer is installed on one side of the second sealing disk, the reducer drives the first rotating shaft, a circulation motor is installed on the reducer, and the circulation motor drives the reducer to operate.

[0011] Furthermore, the first sealing disk, the second sealing disk and the filter plate are all disc-shaped, and the first sealing disk, the second sealing disk and the filter plate are all arranged at an inclined angle, the filter plate is mesh-shaped, and the filter plate is used to filter solid particles in the amine liquid.

[0012] Furthermore, the conveying mechanism includes a liquid supply pipe, a liquid discharge pipe, a first pipe sleeve and a second pipe sleeve, one side of the first sealing disk is fixedly connected with the liquid supply pipe and the second pipe sleeve, one side of the second sealing disk is fixedly connected with the liquid discharge pipe and the first pipe sleeve, the liquid supply pipe and the liquid discharge pipe are communicated through a filter plate, the first pipe sleeve and the second pipe sleeve are communicated through a filter plate, and the liquid supply pipe, the liquid discharge pipe and the second pipe sleeve extend to the outside of the tank body.

[0013] Furthermore, the first pipe sleeve and the drain pipe bracket are connected with a flushing pipe, the angle between the flushing pipe and the drain pipe is an acute angle, and the angles between the liquid supply pipe, the drain pipe, the first pipe sleeve, the second pipe sleeve and the corresponding first sealing disk and the second sealing disk are acute angles.

[0014] Furthermore, the switch mechanism includes a pressure sensor, the pressure sensor is installed inside the liquid supply pipe, a valve is installed on the flushing pipe, a driver is installed on the valve, and the pressure sensor and the driver are electrically connected.

[0015] Furthermore, the synchronization mechanism includes a second rotating shaft, a second rotating shaft is provided inside the second pipe sleeve, a second bevel tooth is fixedly connected to the first rotating shaft, a first bevel tooth is fixedly connected to the second rotating shaft, a transmission shaft is provided between the first rotating shaft and the second rotating shaft, a third bevel tooth is fixedly connected to both ends of the transmission shaft, the transmission shaft engages the first bevel tooth and the second bevel tooth through the corresponding third bevel tooth, a protective cover is connected between the first rotating shaft and the second rotating shaft, and the transmission shaft is rotatably connected to the inside of the protective cover.

[0016] Furthermore, the cleaning mechanism includes a connecting block, a connecting block is installed at one end of the second rotating shaft, a plurality of extension plates are arranged around the connecting block, a cleaning brush is arranged at the bottom end of the extension plate and the connecting block, the cleaning brush contacts the filter plate, two connecting rods are rotatably connected between the extension plate and the connecting block, the connecting block is fixedly connected with the same number of fixing strips as the extension plate, a limiting rod is sleeved on the fixing strip, the bottom end of the limiting rod is rotatably connected to the connecting rod, and a buffer spring is wound around the limiting rod.

[0017] Beneficial effects of the present invention:

[0018] (1) The amine liquid purification system provided by the embodiment of the present invention can completely remove oil and solid particles in the amine liquid, and it does not need to frequently replace the filler in the filter, thereby reducing labor costs and filler replenishment costs;

[0019] (2) The amine-rich solid particle filter provided by the embodiment of the present invention has an inclined angle between the amine liquid conveying pipeline and the filter plate through the setting of the conveying mechanism, thereby increasing the contact area between the amine liquid and the filter plate, and making the filtration more efficient. The filter plate is driven to rotate in a one-way cycle all the time through the setting of the circulation mechanism, so that the used side of the filter plate can be conveniently transferred to the position of the first pipe sleeve. The rinsing pipe draws out the filtered amine liquid to rinse the filter plate, ensuring that the filter plate is always in a clean state, thereby achieving a better effect of filtering solid particles. Through the setting of the switch mechanism, when a certain amount of solid particles are blocked on the filter plate, the liquid pressure at the end of the liquid supply pipe increases. After the pressure sensor detects the pressure increase, the valve is driven by the driver to introduce the liquid in the discharge pipe into the first pipe sleeve through the rinsing pipe, and the filter plate is automatically rinsed according to the detected pressure value, thereby avoiding excessive waste of amine liquid. In addition, the circulation mechanism drives the cleaning mechanism to operate synchronously through the synchronization mechanism, driving multiple cleaning brushes to clean the filter plate, and cleaning is performed together with the provided liquid, thereby achieving a better cleaning and decontamination effect. The buffer spring always resists the connecting rod, so that the extension plate is closer to the filter plate toward the bottom, and the cleaning brush operation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a simplified structural diagram of the amine liquid purification system proposed in an embodiment of the present invention;

[0022] Figure 2This is a schematic diagram of the overall three-dimensional structure of the rich amine liquid solid particle filter proposed in an embodiment of the present invention;

[0023] Figure 3 for Figure 2 The schematic diagram of the structure after the tank body is removed is shown;

[0024] Figure 4 for Figure 3 Another angle schematic diagram shown;

[0025] Figure 5 for Figure 4 A schematic diagram of a portion of the structure shown;

[0026] Figure 6 for Figure 5 A schematic diagram of the structure in which the first sealing disk and the second sealing disk are removed is shown;

[0027] Figure 7 for Figure 6 Another angle schematic diagram shown;

[0028] Figure 8 for Figure 7 The schematic diagram of the connection structure of the synchronization mechanism and the cleaning mechanism shown;

[0029] Fig. 9 for Figure 8 The structural schematic diagram of the cleaning mechanism shown;

[0030] Fig.10 for Fig. 9 Cross-sectional view shown.

[0031] Description of the accompanying drawings: 100, absorption tower; 101, rich amine liquid flash tank; 102, rich amine liquid oil-water separator; 103, rich amine liquid solid particle filter; 104, lean and rich liquid heat exchanger; 105, rich amine liquid regeneration tower; 106, top condenser; 107, reboiler; 108, lean amine liquid cooler; 109, lean amine liquid circulation pump; 110, first mechanical filter; 111, activated carbon filter; 112, second mechanical filter; 114, first pipeline; 115, second pipeline; 116, third pipeline; 117, fourth pipeline; 118, fifth pipeline; 119, the sixth pipeline; 120, the seventh pipeline; 121, the eighth pipeline; 122, the ninth pipeline; 123, the tenth pipeline; 124, the eleventh pipeline; 125, the twelfth pipeline; 126, the thirteenth pipeline; 127, the fourteenth pipeline; 128, the fifteenth pipeline; 129, the sixteenth pipeline; 130, the flow regulating valve; 131, the lean amine liquid flow meter; 132, the seventeenth pipeline; 133, the eighteenth pipeline; 134, the nineteenth pipeline; 135, the twentieth pipeline; 136, the twenty-first pipeline; 137, the first bypass pipeline; 138, the second bypass pipeline;

[0032] 1. Tank body; 2. Circulation mechanism; 21. First sealing disk; 22. Second sealing disk; 23. Connecting bolt; 24. Filter plate; 25. First rotating shaft; 26. Reducer; 27. Circulation motor; 3. Conveying mechanism; 31. Liquid supply pipe; 32. Liquid discharge pipe; 33. First pipe sleeve; 34. Second pipe sleeve; 35. Flushing pipe; 4. Switch mechanism; 41. Pressure sensor; 42. Valve; 43. Driver; 5. Synchronous mechanism; 51. Second rotating shaft; 52. Protective cover; 53. First bevel gear; 54. Second bevel gear; 55. Transmission shaft; 56. Third bevel gear; 6. Cleaning mechanism; 61. Connecting block; 62. Extension plate; 63. Cleaning brush; 64. Connecting rod; 65. Limit rod; 66. Fixing bar; 67. Buffer spring; 7. Mounting base.

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The meaning of "and / or" appearing in the full text is that it includes three parallel schemes. Taking "A and / or B as an example", it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The present invention provides an amine liquid purification system. Figure 1 As shown, including:

[0039] Absorption tower 100, rich amine liquid flash tank 101, rich amine liquid oil-water separator 102, rich amine liquid solid particle filter 103, lean-rich liquid heat exchanger 104, rich amine liquid regeneration tower 105, top condenser 106, reboiler 107, lean amine liquid cooler 108, lean amine liquid circulation pump 109, first mechanical filter 110, activated carbon filter 111, second mechanical filter 112, rich amine liquid pressure reducing valve, multiple valves, multiple differential pressure gauges, lean amine liquid flow regulating valve 130, lean amine liquid flow meter 131 and multiple connecting pipes. The oil-water separator is preferably an oil-water cyclone. The oil-water cyclone uses the density difference of incompatible liquids to separate oil droplets and solid particles from the amine liquid by the principle of high-speed rotation of liquids in a vortex tube to generate different centrifugal forces.

[0040] The rich amine liquid outlet of the absorption tower 100 is connected to the inlet of the rich amine liquid flash tank 101 through a first pipeline 114, the outlet of the rich amine liquid flash tank 101 is connected to the inlet of the rich amine liquid oil-water separator 102 through a second pipeline 115, the outlet of the rich amine liquid oil-water separator 102 is connected to the inlet of the rich amine liquid solid particle filter through a third pipeline 117, the outlet of the rich amine liquid solid particle filter is connected to the inlet of the lean-rich liquid heat exchanger 104 through a fourth pipeline 117, the outlet of the lean-rich liquid heat exchanger 104 is connected to the inlet of the rich amine liquid regeneration tower 105 through a fifth pipeline 118, the outlet of the rich amine liquid regeneration tower 105 is connected to the inlet of the tower top condenser 106 through a sixth pipeline 119, the liquid phase outlet of the tower top condenser 106 is connected to the inlet of the rich amine liquid regeneration tower 105 through a seventh pipeline 120, and the outlet of the rich amine liquid regeneration tower 105 is connected to the inlet of the reboiler 107 through a The eighth pipeline 121 is connected, the gas phase outlet of the reboiler 107 is connected to an inlet of the rich amine liquid regeneration tower 105 through a ninth pipeline 122, the liquid phase outlet of the reboiler 107 is connected to an inlet of the lean-rich liquid heat exchanger 104 through a tenth pipeline 123, the lean-rich liquid heat exchanger 104 is connected to an inlet of the lean amine liquid cooler 108 through an eleventh pipeline 124, the lean amine liquid cooler 108 is connected to an inlet of the amine liquid circulation pump through a twelfth pipeline 125, the amine liquid circulation pump outlet is connected to an inlet of the absorption tower 100 through a thirteenth pipeline 126, the absorption tower 100 is connected to the first mechanical filter 110 through a fourteenth pipeline 127, the first mechanical filter 110 is connected to the activated carbon filter 111 through a fifteenth pipeline 128, and the activated carbon filter 111 and the second mechanical filter 112 are connected through a sixteenth pipeline 129.

[0041] In one embodiment of the present invention, a rich amine liquid pressure reducing valve is installed on the first pipeline 114, a lean amine liquid flow regulating valve 130, a lean amine liquid flow meter 131 and a valve are provided on the fourteenth pipeline 127, and a valve is provided on the fifteenth pipeline 128 and the sixteenth pipeline 129.

[0042] In this embodiment, the raw gas enters the absorption tower 100 through the air inlet pipe, reacts with the lean amine liquid entering the absorption tower 100 through the thirteenth pipe 126 above the absorption tower 100, and then goes to the next link through the seventeenth pipe 132; the rich amine liquid with a pressure of 2-5MPa from the bottom of the absorption tower 100 is reduced to 0.3-0.6MPa through the first pipe 114 and the rich amine liquid pressure reducing valve and then goes to the rich amine liquid flash tank 101, and the non-condensable gas dissolved in the flashed amine liquid in the rich amine liquid flash tank 101 is discharged to the venting collection system through the eighteenth pipe 133; the rich amine liquid flash tank 10 The bottom rich amine liquid enters the rich amine liquid oil-water separator 102 through the second pipeline 115, and the oil and large solid particles in the rich amine liquid are separated and sent to the dirty oil collector through the nineteenth pipeline 134 for external discharge treatment; the rich amine liquid separated by the rich amine liquid oil-water separator 102 enters the rich amine liquid solid particle filter 103 through the third pipeline 117, and further filters the solid particles with smaller particle size in the rich amine liquid. After filtration, the rich amine liquid passes through the fourth pipeline 117, passes through the lean-rich liquid heat exchanger 104, and then is sent to the rich amine liquid regeneration tower 105 through the fifth pipeline 118.

[0043] The gas phase at the top of the rich amine liquid regeneration tower 105 enters the tower top condenser 106 through the sixth pipeline 119, and the liquid phase after condensation returns to the rich amine liquid regeneration tower 105 through the seventh pipeline 120, and the non-condensable gas portion goes to the next link through the twentieth pipeline 135; the amine liquid at the bottom of the rich amine liquid regeneration tower 105 enters the reboiler 107 through the eighth pipeline 121 and returns to the rich amine liquid regeneration tower 105 through the ninth pipeline 122; the regenerated amine liquid enters the pipeline lean-rich liquid heat exchanger 104 through the tenth pipeline 123, enters the lean amine liquid cooler 108 through the eleventh pipeline 124, and then enters the lean amine liquid circulation pump 109 through the twelfth pipeline 125; 80%-90% of the lean amine liquid from the liquid circulation pump 109 enters the absorption tower 100 through the thirteenth pipeline 126, and the other part of 10%-20% of the lean amine liquid enters the first mechanical filter 110 through the fourteenth pipeline 127, the lean amine liquid flow regulating valve 130, the lean amine liquid flow meter 131 and the valve; the amine liquid after passing through the first mechanical filter 110 enters the activated carbon filter 111 through the fifteenth pipeline 128 and the valve thereon, and the filtered amine liquid enters the second mechanical filter 112 through the sixteenth pipeline 129 and the valve thereon, and finally enters the twelfth pipeline 125 through the twenty-first pipeline 136 and the valve thereon.

[0044] Two first bypass pipes 137 are connected between the second pipe 115 and the fourth pipe 117, and two second bypass pipes 138 are connected between the fourteenth pipe 127 and the twenty-first pipe 136. A valve and a differential pressure gauge are respectively installed on the two first bypass pipes 137, and a valve and a differential pressure gauge are respectively installed on the two second bypass pipes 138. When the differential pressure value exceeds the set value, it can be updated by replacing the filler inside the filter. At the same time, the bypass line can realize the replacement of the filler without stopping the machine.

[0045] Based on the above, the present invention also proposes a filter for solid particles in a rich amine solution. Figure 2 - Fig.10 As shown, it comprises: a tank body 1, a mounting base 7 is provided at the bottom end of the tank body 1, a circulation mechanism 2 for a movable filtering assembly is provided inside the tank body 1, conveying mechanisms 3 for conveying amine liquid extend from both sides of the circulation mechanism 2, a switch mechanism 4 for opening and closing a valve by detecting liquid pressure is installed on the conveying mechanism 3, a cleaning mechanism 6 for assisting in cleaning and descaling is connected to the conveying mechanism 3, and the circulation mechanism 2 and the cleaning mechanism 6 are driven to operate synchronously through a synchronization mechanism 5.

[0046] In one embodiment of the present invention, the circulation mechanism 2 includes a first sealing disc 21 and a second sealing disc 22. The first sealing disc 21 and the second sealing disc 22 are provided inside the tank body 1. The first sealing disc 21 and the second sealing disc 22 are provided with an equal number of connecting bolts 23 on opposite sides. A closed space is formed between the first sealing disc 21 and the second sealing disc 22 through the connecting bolts 23. A first rotating shaft 25 is rotatably connected between the first sealing disc 21 and the second sealing disc 22. A filter plate 24 is fixedly connected to the first rotating shaft 25. The filter plate 24 is located between the first sealing disc 21 and the second sealing disc 22. A reducer 26 is installed on one side of the second sealing disc 22. The reducer 26 drives the first rotating shaft 25. A circulation motor 27 is installed on the reducer 26. The circulation motor 27 drives the reducer 26 to move. The first sealing disk 21, the second sealing disk 22 and the filter plate 24 are all in the shape of a disc, and the first sealing disk 21, the second sealing disk 22 and the filter plate 24 are all set at an inclined angle. The filter plate 24 is in the shape of a mesh, and the filter plate 24 is used to filter solid particles in the amine liquid; various mechanisms for filtering the amine liquid are assembled inside the tank body 1. When in use, the circulation motor 27 is first started. The circulation motor 27 drives the filter plate 24 through the first rotating shaft 25, so that the filter plate 24 rotates in the sealed space formed between the first sealing disk 21 and the second sealing disk 22. The filter plate 24 cleaned by the cleaning mechanism 6 is transferred to the side used for filtering under the drive of the circulation motor 27, so that the amine liquid always contacts the cleaned part, thereby maintaining the filtering effect of the filter plate 24 and avoiding clogging.

[0047] In one embodiment of the present invention, the conveying mechanism 3 includes a liquid supply pipe 31 (connected to the third pipeline 116), a liquid discharge pipe 32 (connected to the fourth pipeline 117), a first pipe sleeve 33 and a second pipe sleeve 34 (for the discharge of solid particles). One side of the first sealing disk 21 is fixedly connected to the liquid supply pipe 31 and the second pipe sleeve 34, and one side of the second sealing disk 22 is fixedly connected to the liquid discharge pipe 32 and the first pipe sleeve 33. The liquid supply pipe 31 and the liquid discharge pipe 32 are connected through the filter plate 24. The first pipe sleeve 33 and The second pipe sleeves 34 are connected through the filter plate 24, the liquid supply pipe 31, the drain pipe 32 and the second pipe sleeve 34 extend to the outside of the tank body 1, the first pipe sleeve 33 and the drain pipe 32 bracket are connected with a flushing pipe 35, the angle between the flushing pipe 35 and the drain pipe 32 is an acute angle, and the angles between the liquid supply pipe 31, the drain pipe 32, the first pipe sleeve 33, the second pipe sleeve 34 and the first sealing disk 21 and the second sealing disk 22 connected to each other are acute angles; the liquid supply pipe 31 is used to transport the original liquid to the inside of the tank body 1 Amine liquid, the drain pipe 32 transports the filtered amine liquid to the next device, wherein the first pipe sleeve 33 and the second pipe sleeve 34 are further provided on both sides of the filter plate 24, the clean amine liquid in the drain pipe 32 is led out by the flushing pipe 35, and then introduced into the interior of the second pipe sleeve 34, and then discharged from the first pipe sleeve 33, the liquid conveying channel formed between the liquid supply pipe 31 and the drain pipe 32 is opposite to the liquid conveying channel formed between the first pipe sleeve 33 and the second pipe sleeve 34, so that the filter plate 24 is backwashed with the help of clean amine liquid, and one side of the used filter plate 24 is cleaned, and then the cleaned side of the filter plate 24 re-participates in the filtering operation to maintain the filtering effect, and finally the flushed solid particles are discharged from the second pipe sleeve 34, the liquid supply pipe 31 and the drain pipe 32 and the first pipe sleeve 33 and the second pipe sleeve 34 are all arranged at an inclined angle with the filter plate 24, and the inclination angle setting relative to the vertical angle can make the amine liquid and the filter plate 24 have a larger contact area for sharing and dispersing the filtering pressure.

[0048] In one embodiment of the present invention, the switch mechanism 4 includes a pressure sensor 41, the pressure sensor 41 is installed inside the liquid supply pipe 31, a valve 42 is installed on the flushing pipe 35, and a driver 43 is installed on the valve 42. The pressure sensor 41 and the driver 43 are electrically connected; the pressure sensor 41 is installed inside the liquid supply pipe 31, and the pressure sensor 41 is used to detect the hydraulic pressure at the liquid supply end. When a certain amount of solid particles are blocked on the filter plate 24, the filtering capacity of the filter plate 24 decreases, and the hydraulic pressure at the end of the liquid supply pipe 31 increases. When it exceeds a preset value, the pressure The force sensor 41 transmits the signal to the driver 43, and the driver 43 drives the valve 42 to open. The driver 43 is a prior art, and can use a cylinder or a telescopic motor as a power to push the valve 42. The filtered amine liquid reversely flushes the filter plate 24 through the flushing pipe 35 to flush and clean the solid particles blocked on the filter plate 24. After that, the filtration pressure of the filter plate 24 is reduced, and the hydraulic pressure at the end of the liquid supply pipe 31 decreases, and the corresponding valve 42 is closed to avoid wasting too much treated amine liquid, thereby playing an automatic control role, and repeating this process.

[0049] In one embodiment of the present invention, the synchronization mechanism 5 includes a second rotating shaft 51, a second rotating shaft 51 is provided inside the second pipe sleeve 34, a second bevel gear 54 is fixedly connected to the first rotating shaft 25, a first bevel gear 53 is fixedly connected to the second rotating shaft 51, a transmission shaft 55 is provided between the first rotating shaft 25 and the second rotating shaft 51, and a third bevel gear 56 is fixedly connected to both ends of the transmission shaft 55, and the transmission shaft 55 engages the first bevel gear 53 and the second bevel gear 54 through the corresponding third bevel gear 56. A protective cover 52 is connected between the first rotating shaft 25 and the second rotating shaft 51, and the transmission shaft 55 is rotatably connected to the inside of the protective cover 52; after the first rotating shaft 25 rotates, the second rotating shaft 51 is driven to rotate synchronously through the transmission shaft 55 and a plurality of bevel gears, and the cleaning mechanism 6 is driven to operate by the second rotating shaft 51, and the filter plate 24 is cleaned synchronously with the circulating motor 27.

[0050] In one embodiment of the present invention, the cleaning mechanism 6 includes a connecting block 61, one end of the second rotating shaft 51 is equipped with the connecting block 61, a plurality of extension plates 62 are arranged around the connecting block 61, the bottom ends of the extension plates 62 and the connecting block 61 are provided with cleaning brushes 63, the cleaning brushes 63 contact the filter plate 24, and two connecting rods 64 are rotatably connected between the extension plate 62 and the connecting block 61, and the connecting block 61 is fixedly connected with the same number of fixing bars 66 as the extension plate 62, and the fixing bars 66 are sleeved with a limiting rod 65, and the bottom of the limiting rod 65 is The end is rotated to connect the connecting rod 64, and a buffer spring 67 is wound on the limit rod 65; after the connecting block 61 is driven, the extension plate 62 is driven to rotate through multiple connecting rods 64, so that the cleaning brush 63 cleans the solid particles on one side of the filter plate 24, and the effect of liquid backwashing is doubled. The buffer spring 67 is in contact between the fixed bar 66 and the connecting rod 64, driving the connecting rod 64 to deflect, so that the extension plate 62 is always pushed close to the filter plate 24, so that the contact between the cleaning brush 63 and the filter plate 24 is good, and the effect is more effective.

[0051] When the present invention is in use, various mechanisms for filtering amine liquid are assembled inside the tank body 1. When in use, the circulation motor 27 is first started. The circulation motor 27 drives the filter plate 24 through the first rotating shaft 25, so that the filter plate 24 rotates in the sealed space formed between the first sealing disk 21 and the second sealing disk 22. The filter plate 24 cleaned by the cleaning mechanism 6 is transferred to the side used for filtering under the drive of the circulation motor 27. The amine liquid always contacts the cleaned part, thereby maintaining the filtering effect of the filter plate 24 and avoiding blockage; the liquid supply pipe 31 is used to transport the original amine liquid to the inside of the tank body 1, and the liquid discharge pipe 32 transports the filtered amine liquid to the next device. The first and second pipe sleeves 33 and 34 are provided on both sides of the filter plate 24. The clean amine liquid in the drain pipe 32 is led out by the flushing pipe 35, and then introduced into the interior of the second pipe sleeve 34, and then discharged from the first pipe sleeve 33. The liquid delivery channel formed between the liquid supply pipe 31 and the drain pipe 32 is opposite to the liquid delivery channel formed between the first and second pipe sleeves 33 and 34. Therefore, the filter plate 24 is backwashed with the help of the clean amine liquid, and one side of the used filter plate 24 is cleaned. Then, the cleaned side of the filter plate 24 re-participates in the filtering operation to maintain the filtering effect. Finally, the flushed solid particles are discharged from the second pipe sleeve 34, and the liquid supply pipe 31 and the drain pipe 32 are opposite to each other. The pipe 31 and the drain pipe 32 as well as the first pipe sleeve 33 and the second pipe sleeve 34 are all arranged at an inclined angle with respect to the filter plate 24. The inclined angle relative to the vertical angle can make the contact area between the amine liquid and the filter plate 24 larger, which is used to share and disperse the filtering pressure; a pressure sensor 41 is installed inside the liquid supply pipe 31, and the pressure sensor 41 is used to detect the hydraulic pressure at the liquid supply end. When a certain amount of solid particles are blocked on the filter plate 24, the filtering capacity of the filter plate 24 decreases, and the hydraulic pressure at the end of the liquid supply pipe 31 increases. When it exceeds the preset value, the pressure sensor 41 transmits the signal to the driver 43, wherein the driver 43 is a prior art, and can be a cylinder or a telescopic The motor and other technologies are used as the power to push the valve 42, and the driver 43 drives the valve 42 to open. Then, the filtered amine liquid reversely flushes the filter plate 24 through the flushing pipe 35, and the solid particles blocked on the filter plate 24 are flushed and cleaned. After that, the filtering pressure of the filter plate 24 is reduced, and the hydraulic pressure at the end of the liquid supply pipe 31 is reduced, and the corresponding valve 42 is closed, so as to avoid wasting too much processed amine liquid, and play an automatic control role, and so on. After the first rotating shaft 25 rotates, the second rotating shaft 51 is driven to rotate synchronously through the transmission shaft 55 and a plurality of bevel teeth, and the cleaning mechanism 6 is driven by the second rotating shaft 51 to run, and the filter plate 24 is cleaned synchronously with the circulating motor 27;After the connecting block 61 is driven, the extension plate 62 is driven to rotate through multiple connecting rods 64, so that the cleaning brush 63 cleans the solid particles on one side of the filter plate 24, and the effect of liquid backwashing is doubled. The buffer spring 67 abuts between the fixing bar 66 and the connecting rod 64, driving the connecting rod 64 to deflect, so that the extension plate 62 is always pushed close to the filter plate 24, so that the contact between the cleaning brush 63 and the filter plate 24 is good, and the effect is more effective. ;

[0052] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An amine liquid purification system, It is characterized in that The invention comprises: an absorption tower, a rich amine liquid flash tank, a rich amine liquid oil-water separator, a rich amine liquid solid particle filter, a lean-rich liquid heat exchanger, a rich amine liquid regeneration tower, a tower top condenser, a reboiler, a lean amine liquid cooler, a lean amine liquid circulation pump, a first mechanical filter, an activated carbon filter, and a second mechanical filter; the rich amine liquid outlet of the absorption tower is connected to the inlet of the rich amine liquid flash tank through a first pipeline, the outlet of the rich amine liquid flash tank is connected to the inlet of the rich amine liquid oil-water separator through a second pipeline, the outlet of the rich amine liquid oil-water separator is connected to the inlet of the rich amine liquid solid particle filter through a third pipeline, the outlet of the rich amine liquid solid particle filter is connected to the inlet of the lean-rich liquid heat exchanger through a fourth pipeline, the first outlet of the lean-rich liquid heat exchanger is connected to the first inlet of the rich amine liquid regeneration tower through a fifth pipeline, the first outlet of the rich amine liquid regeneration tower is connected to the inlet of the tower top condenser through a third pipeline, and the second outlet of the rich amine liquid regeneration tower is connected to the inlet of the tower top condenser through a fourth pipeline. The first outlet of the tower top condenser is connected to the first inlet of the rich amine liquid regeneration tower through a seventh pipeline, the first outlet of the rich amine liquid regeneration tower is connected to the first inlet of the reboiler through an eighth pipeline, the gas phase outlet of the reboiler is connected to the first inlet of the rich amine liquid regeneration tower through a ninth pipeline, the liquid phase outlet of the reboiler is connected to the first inlet of the lean-rich liquid heat exchanger through a tenth pipeline, the first outlet of the lean-rich liquid heat exchanger is connected to the inlet of the lean amine liquid cooler through an eleventh pipeline, the first outlet of the lean amine liquid cooler is connected to the inlet of the amine liquid circulation pump through a twelfth pipeline, the outlet of the amine liquid circulation pump is connected to the first inlet of the absorption tower through a thirteenth pipeline, the absorption tower is connected to the first mechanical filter through a fourteenth pipeline, the first mechanical filter is connected to the activated carbon filter through a fifteenth pipeline, and the activated carbon filter is connected to the second mechanical filter through a sixteenth pipeline; The amine-rich liquid solid particle filtering device comprises a tank body, a mounting base is provided at the bottom end of the tank body, a circulation mechanism for a movable filtering assembly is provided inside the tank body, a conveying mechanism for conveying amine liquid is extended from both sides of the circulation mechanism, a switch mechanism for opening and closing a valve by detecting liquid pressure is installed on the conveying mechanism, a cleaning mechanism for assisting in cleaning and descaling is connected to the conveying mechanism, and the circulation mechanism and the cleaning mechanism are driven to operate synchronously by a synchronization mechanism; The circulation mechanism comprises a first sealing disc and a second sealing disc, the first sealing disc and the second sealing disc are arranged inside the tank body, the first sealing disc and the second sealing disc are arranged on opposite sides with an equal number of connecting bolts, a closed space is formed between the first sealing disc and the second sealing disc through the connecting bolts, and a first rotating shaft is rotatably connected between the first sealing disc and the second sealing disc, a filter plate is fixedly connected to the first rotating shaft, and the filter plate is located between the first sealing disc and the second sealing disc; The circulation mechanism further includes a reducer, a reducer is installed on one side of the second sealing disk, the reducer drives the first rotating shaft, a circulation motor is installed on the reducer, and the circulation motor drives the reducer to operate; The conveying mechanism includes a liquid supply pipe, a liquid discharge pipe, a first pipe sleeve and a second pipe sleeve, one side of the first sealing disc is fixedly connected with the liquid supply pipe and the second pipe sleeve, one side of the second sealing disc is fixedly connected with the liquid discharge pipe and the first pipe sleeve, the liquid supply pipe and the liquid discharge pipe are communicated through a filter plate, the first pipe sleeve and the second pipe sleeve are communicated through a filter plate, and the liquid supply pipe, the liquid discharge pipe and the second pipe sleeve extend to the outside of the tank body; The first pipe sleeve and the drain pipe bracket are connected with a flushing pipe, the angle between the flushing pipe and the drain pipe is an acute angle, and the angles between the liquid supply pipe, the drain pipe, the first pipe sleeve, the second pipe sleeve and the corresponding first sealing disk and the second sealing disk are acute angles.

2. An amine liquid purification system according to claim 1, It is characterized in that The first sealing disc, the second sealing disc and the filter plate are all disc-shaped, and are arranged at an inclined angle. The filter plate is mesh-shaped and is used to filter solid particles in the amine liquid.

3. An amine liquid purification system according to claim 1, It is characterized in that The switch mechanism comprises a pressure sensor, the pressure sensor is installed inside the liquid supply pipe, a valve is installed on the flushing pipe, a driver is installed on the valve, and the pressure sensor and the driver are electrically connected.

4. An amine liquid purification system according to claim 1, It is characterized in that The synchronization mechanism includes a second rotating shaft, a second rotating shaft is provided inside the second pipe sleeve, a second bevel tooth is fixedly connected to the first rotating shaft, a first bevel tooth is fixedly connected to the second rotating shaft, a transmission shaft is provided between the first rotating shaft and the second rotating shaft, a third bevel tooth is fixedly connected to both ends of the transmission shaft, the transmission shaft meshes with the first bevel tooth and the second bevel tooth through the corresponding third bevel tooth, a protective cover is connected between the first rotating shaft and the second rotating shaft, and the transmission shaft is rotatably connected to the inside of the protective cover.

5. An amine liquid purification system according to claim 4, It is characterized in that The cleaning mechanism includes a connecting block, a connecting block is installed at one end of the second rotating shaft, a plurality of extension plates are arranged around the connecting block, a cleaning brush is arranged at the bottom end of the extension plate and the connecting block, the cleaning brush contacts the filter plate, two connecting rods are rotatably connected between the extension plate and the connecting block, the connecting block is fixedly connected with the same number of fixing strips as the extension plate, a limiting rod is sleeved on the fixing strip, the bottom end of the limiting rod is rotatably connected to the connecting rod, and a buffer spring is wound around the limiting rod.

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