CN113155349A - Regeneration tower differential pressure measuring device and regeneration tower differential pressure measuring system - Google Patents
Regeneration tower differential pressure measuring device and regeneration tower differential pressure measuring system Download PDFInfo
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- CN113155349A CN113155349A CN202110453514.2A CN202110453514A CN113155349A CN 113155349 A CN113155349 A CN 113155349A CN 202110453514 A CN202110453514 A CN 202110453514A CN 113155349 A CN113155349 A CN 113155349A
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- 238000011069 regeneration method Methods 0.000 title claims abstract description 51
- 230000008929 regeneration Effects 0.000 title claims abstract description 50
- 238000002955 isolation Methods 0.000 claims abstract description 83
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 58
- 238000005070 sampling Methods 0.000 claims abstract description 43
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 38
- 238000007664 blowing Methods 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 12
- 241000521257 Hydrops Species 0.000 abstract description 3
- 206010030113 Oedema Diseases 0.000 abstract description 3
- 239000000872 buffer Substances 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 12
- 239000000243 solution Substances 0.000 description 9
- 150000001412 amines Chemical class 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 4
- 239000007853 buffer solution Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
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- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
- B01D2256/245—Methane
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a differential pressure measuring device and a differential pressure measuring system of a regeneration tower, which comprise: the differential pressure measurement assembly comprises a positive pressure end and a negative pressure end; the positive isolation tank comprises a positive sample port and a positive sample outlet, the positive sample port is used for being connected with the end to be measured, the positive sample outlet is connected with the positive pressure end of the differential pressure measurement assembly, the positive sample port is arranged on the side surface of the positive isolation tank, and the positive sample outlet is arranged at the bottom of the positive isolation tank; the negative isolation tank comprises a negative sampling port and a negative sample outlet, the negative sampling port is used for being connected with the end to be measured, the negative sample outlet is connected with the negative pressure end of the differential pressure measurement assembly, the negative sampling port is arranged on the side surface of the negative isolation tank, and the negative sample outlet is arranged at the bottom of the negative isolation tank; positive holding tank and burden holding tank all are used for the splendid attire buffer fluid, through structural design, all set up the holding tank in differential pressure measurement subassembly both sides, can effectual elimination get the influence of pressure pipeline hydrops to the differential pressure measured value to realize the accurate measurement of differential pressure.
Description
Technical Field
The invention relates to the technical field of natural gas desulfurization, coal bed gas desulfurization and tail gas treatment, in particular to a differential pressure measuring device and a differential pressure measuring system of a regeneration tower.
Background
The natural gas purification plant is an indispensable intermediate link for the development and utilization of sulfur-containing natural gas, and is provided with a desulfurization device which adopts an amine liquid desulfurization process. The amine liquid desulfurization process needs to carry out regeneration and cyclic utilization on the amine liquid, the regeneration tower is a key device for regenerating the rich amine liquid, the rich amine liquid is regenerated in the regeneration tower, and the quality of the operation of the regeneration tower directly determines whether the amine liquid regeneration is qualified or not, so that the quality of the product natural gas is influenced.
The pressure difference of the regeneration tower is one of the important parameters of the operation of the regeneration tower and is also a key parameter of the operation of the whole desulfurization device, whether the liquid blocking occurs in the regeneration tower or not, whether the system solution foams or not and the like can be directly reflected through the pressure difference, and an operator needs to perform operation adjustment according to the pressure difference value of the regeneration tower. The differential pressure of the regeneration tower is usually measured by a differential pressure transmitter, and the vertical height of an upper pressure taking port and a lower pressure taking port of the differential pressure of the measurement tower is large and varies from tens of meters to forty meters due to the small diameter, the high height and the large number of layers of internal tower trays of the regeneration tower, so that the length of a pressure guide pipe on the positive pressure side is also long; the pressure sampling valve is usually a needle valve, the pressure sampling pipeline is a stainless steel pipe with the diameter of phi 12 multiplied by 2, and the differential pressure transmitter is arranged on the upper platform of the regeneration tower (the transmitter is higher than the upper pressure sampling port), as shown in figure 1.
Disclosure of Invention
Aiming at the technical problem that the differential pressure measurement of the regeneration tower in the prior art is inaccurate, the invention aims to provide a differential pressure measurement device and a differential pressure measurement system of the regeneration tower, which can achieve the purpose of accurately measuring the differential pressure in the regeneration tower.
The embodiment of the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a differential pressure measurement apparatus for a regeneration tower, including: the differential pressure measurement assembly comprises a positive pressure end and a negative pressure end; the positive isolation tank comprises a positive sampling port and a positive sample outlet, the positive sampling port is used for being connected with a to-be-detected end, the positive sample outlet is connected with the positive pressure end of the differential pressure measurement assembly, the positive sampling port is arranged on the side surface of the positive isolation tank, and the positive sample outlet is arranged at the bottom of the positive isolation tank; the negative isolation tank comprises a negative sampling port and a negative sample outlet, the negative sampling port is used for being connected with a to-be-measured end, the negative sample outlet is connected with the negative pressure end of the differential pressure measurement assembly, the negative sampling port is arranged on the side surface of the negative isolation tank, and the negative sample outlet is arranged at the bottom of the negative isolation tank; the positive isolation tank and the negative isolation tank are used for containing isolation liquid.
In this scheme, based on differential pressure measurement subassembly measurement pressure differential the malleation end and the negative pressure end of differential pressure measurement subassembly all are provided with the shielded cell that is used for storing the buffer solution, just malleation end is connected with the positive appearance mouth that goes out of positive shielded cell bottom surface, the negative pressure end is connected with the negative appearance mouth that goes out of negative shielded cell bottom surface, sets for through positive shielded cell, negative shielded cell and differential pressure measurement subassembly's relative position, all fills with liquid in can guaranteeing the pipeline at malleation end and the negative pressure end both ends of differential pressure measurement subassembly to eliminate the influence of intraductal hydrops to regenerator column differential pressure measurement value.
Furthermore, the positive isolation tank and the negative isolation tank are filled with isolation liquid.
Furthermore, the sampling device also comprises an upper pressure taking valve connected with the negative sampling port and a lower pressure taking valve connected with the positive sampling port.
Further, go up the pressure-tapping valve and the pressure-tapping valve is the ball valve down, adopts the ball valve, the effectual circulation bore that increases the pressure-tapping valve, the problem of the pipeline jam of effectual solution.
Further, the device also comprises an air blowing device, wherein the air blowing device comprises a manual valve; manual valve one end with the negative sampling mouth is connected, and the other end is used for being connected with nitrogen gas system, through setting up gas blowing device, can sweep the pressure line according to actual conditions, can effectually solve the problem that the pipeline blockked up, and through gas blowing device's setting, can be quick blow in the regeneration tower with the absorption liquid of pressure line, avoid causing the loss of absorption liquid because of using this differential pressure measuring device.
Furthermore, the height of the bottom surface of the negative isolation tank relative to the ground is higher than that of the top surface of the positive isolation tank relative to the ground, and the measurement accuracy can be effectively guaranteed through the position arrangement of the positive isolation tank and the negative isolation tank.
Further, the differential pressure measurement assembly further comprises three valve groups, wherein each valve group comprises a positive pressure measurement chamber, a negative pressure measurement chamber and a balance valve; the malleation measuring room of three valves with the malleation end intercommunication of differential pressure measurement subassembly, the negative pressure measuring room of three valves with the negative pressure end intercommunication of differential pressure measurement subassembly, the balanced valve intercommunication malleation measuring room and negative pressure measurement room through setting up three valves, the quick discharge of absorption liquid in the pipeline is pressed to the realization through opening of accessible balanced valve, when guaranteeing efficiency, further avoids causing the loss of absorption liquid because of using this differential pressure measuring device.
Furthermore, the height of the bottom surface of the negative isolation tank relative to the ground and the height of the bottom surface of the positive isolation tank relative to the ground are both higher than the height of the differential pressure measurement assembly relative to the ground, and the isolation liquid in the positive isolation tank and the isolation liquid in the negative isolation tank can be ensured to flow to the positive pressure end and the negative pressure end of the differential pressure measurement assembly along a pressure taking pipeline through the arrangement of the positive isolation tank and the negative isolation tank and the relative position of the differential pressure measurement assembly, so that the measurement accuracy is ensured.
In a second aspect, the embodiment of the invention further provides a differential pressure measurement system for a regeneration tower, which includes the above differential pressure measurement device and the regeneration tower, wherein the differential pressure measurement device is connected with the side wall of the regeneration tower.
Furthermore, the regeneration tower, the positive isolation tank and the negative isolation tank are all filled with desulfurization liquid.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the regeneration tower differential pressure measuring device and the regeneration tower differential pressure measuring system, due to the structural design, the isolation tanks are arranged on the two sides of the differential pressure measuring assembly, so that the influence of accumulated liquid in a pressure measuring pipeline on a differential pressure measuring value can be effectively eliminated, and the accurate measurement of the differential pressure is realized;
2. according to the regeneration tower differential pressure measuring device and the regeneration tower differential pressure measuring system, the problem of pipeline congestion can be effectively solved by designing the ball valve and the blowing device;
3. according to the differential pressure measuring device and the differential pressure measuring system of the regeneration tower, provided by the invention, the solution in the pressure taking pipeline and the isolation tank can be quickly discharged and recovered by arranging the air blowing device, so that the loss of the solution is avoided;
4. the invention relates to a regenerator tower differential pressure measuring device and a regenerator tower differential pressure measuring system, which adopt stainless steel pipes with phi 12 multiplied by 1 mm-phi 18 multiplied by 3mm, and adopt the connection mode of a ferrule straight joint and a ferrule three-way joint, and have the characteristics of simple construction and convenient maintenance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of a prior art regenerator differential pressure measurement configuration;
FIG. 2 is a schematic structural diagram of a differential pressure measurement device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a differential pressure measurement system of a regeneration tower according to an embodiment of the invention.
1-differential pressure measuring component, 11-three valve group, 2-positive isolation tank, 21-positive sampling port, 22-positive sample outlet, 23-positive pressure side blow-down valve, 24-positive isolation tank exhaust plug, 3-negative isolation tank, 31-negative sampling port, 32-negative sample outlet, 33-negative pressure side blow-down valve, 34-negative isolation tank exhaust plug, 4-upper pressure taking valve, 5-lower pressure taking valve, 61-nitrogen system, 62-manual valve, 7-regeneration tower.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the scope of the present invention.
Examples
As shown in fig. 2, an embodiment of the present invention provides a differential pressure measuring apparatus for a regeneration tower, including: the differential pressure measuring assembly 1 comprises a positive pressure end and a negative pressure end; the positive isolation tank 2 comprises a positive sampling port 21 used for being connected with a to-be-detected end and a positive sample outlet 22 connected with a positive pressure end of the differential pressure measurement assembly 1, wherein the positive sampling port 21 is arranged on the side surface of the positive isolation tank 2, and the positive sample outlet 22 is arranged at the bottom of the positive isolation tank 2; the negative isolation tank 3 comprises a negative sampling port 31 used for being connected with a to-be-detected end and a negative sample outlet 32 connected with the negative pressure end of the differential pressure measurement assembly 1, wherein the negative sampling port 31 is arranged on the side surface of the negative isolation tank 3, and the negative sample outlet 32 is arranged at the bottom of the negative isolation tank 3; the positive isolation tank 2 and the negative isolation tank 3 are used for containing isolation liquid.
In this embodiment, based on differential pressure measurement subassembly 1 measurement pressure differential the malleation end and the negative pressure end of differential pressure measurement subassembly 1 all are provided with the shielded cell that is used for storing the buffer solution, just the malleation end is connected with the positive appearance mouth 22 of positive shielded cell 2 bottom surfaces, the negative pressure end is connected with the negative appearance mouth 32 of negative shielded cell 3 bottom surfaces, sets for through positive shielded cell 2, negative shielded cell 3 and differential pressure measurement subassembly 1's relative position, all fills liquid in the pipeline at malleation end and the negative pressure end both ends of differential pressure measurement subassembly 1 to eliminate the influence of intraductal hydrops to regenerator tower 7 differential pressure measurement value.
The differential pressure measurement assembly 1 includes, but is not limited to, a differential pressure transmitter, a differential pressure gauge, and a differential pressure gauge.
The positive sampling port 21 is arranged on the side surface of the positive isolation tank 2, the positive sample outlet 22 is arranged on the bottom surface of the positive isolation tank 2, the positive sampling port 21 can be arranged on the side surface close to the tank top of the positive isolation tank 2, can be arranged at any position of the middle position of the tank top and the tank bottom, and can be arranged at a position close to the tank bottom, specifically, the positive sampling port 21 is arranged in an area close to the tank top of the middle position of the tank top and the tank bottom, so that the positive sampling tank forms a containing cavity, liquid entering from the positive sampling port 21 flows into the containing cavity for storage, the storage amount of the isolation liquid can be ensured at the corresponding position, the pressure taking pipeline is further ensured to be filled with the isolation liquid, and therefore, the influence of accumulated liquid in the pipeline on the pressure difference measurement value of the regeneration tower 7 is eliminated; the negative thief hatch 31 may be provided at the same or different positions as the positive thief hatch 21.
Wherein, the pressure tapping pipeline adopts a stainless steel pipe with phi 12 multiplied by 1mm to phi 18 multiplied by 3mm, and the connecting mode adopts the connection of a ferrule straight joint and a ferrule three-way joint, thereby having the characteristics of simple construction and convenient maintenance.
Specifically, differential pressure measurement subassembly 1, positive buffer tank 2, negative buffer tank 3 are through getting the pressure pipeline connection, getting the pressure pipeline and being stainless steel pipeline, adopting stainless steel pipeline can effectual reduction corrosion to the influence of pipeline, improve life, preferably still can the pipeline surface does the anticorrosion and handles, further improves corrosion resistance.
Preferably, the positive isolation tank 2 and the negative isolation tank 3 are filled with isolation liquid.
Wherein the spacer fluid is an absorption fluid.
In some embodiments, the differential pressure measuring device further comprises an upper pressure-taking valve 4 connected to the negative sampling port 31, and a lower pressure-taking valve 5 connected to the positive sampling port 21.
Wherein, go up pressure taking valve 4 and pressure taking valve 5 down and all can be directly be connected with the positive and negative holding tank 3 that corresponds, also can be connected with the positive and negative holding tank 3 that corresponds through the pipeline, set up the mode of pipeline, prolonged positive and negative holding tank 3 and last pressure taking valve 4 and the relative distance between pressure taking valve 5 down, it is convenient differential pressure measuring device's installation.
Specifically, go up pressure taking valve 4 and pressure taking valve 5 is the ball valve down, adopts the ball valve, the effectual circulation bore that increases pressure taking valve, the problem of the pipeline jam of effectual solution.
In some embodiments, the differential pressure measurement device further comprises an air-blowing device comprising a manual valve 62; one end of the manual valve 62 is connected with the negative sampling port 31, the other end of the manual valve is used for being connected with a nitrogen system, the pressure sampling pipeline can be blown and swept according to actual conditions by arranging the blowing device, the problem of pipeline blockage can be effectively solved, and absorption liquid of the pressure sampling pipeline can be quickly blown into the regeneration tower 7 by the arrangement of the blowing device, so that the loss of the absorption liquid caused by the use of the differential pressure measuring device is avoided.
Specifically, one end of the manual valve 62 may be directly connected to the negative sampling port 31, or may be connected to the negative sampling port 31 through a pressure-taking pipeline; the connection position is located go up pressure taking valve 4 with the connection side of negative sample connection 31 can be in passing through gas blowing device blows to the pressure taking pipeline, and the accessible is closed and is gone up sample valve 4, avoids gaseous other end discharge from pressure taking valve through last pressure taking valve 4, influences gas blowing device's work efficiency.
In some embodiments, the height of the bottom surface of the negative isolation tank 3 relative to the ground is higher than that of the top surface of the positive isolation tank 2 relative to the ground, and the measurement accuracy can be effectively ensured by the position arrangement of the positive isolation tank 3 and the negative isolation tank 3.
In some embodiments, the differential pressure measurement assembly 1 further comprises a three-valve set 11 and a differential pressure transmitter, the three-valve set 11 comprises a positive pressure side valve connected with a positive pressure chamber of the differential pressure transmitter, a negative pressure side valve connected with a negative pressure chamber of the differential pressure transmitter, and a balance valve; the balance valve communicates positive pressure chamber and negative pressure chamber, and through setting up three valves 11, the quick discharge of absorption liquid in the pipeline is got to opening of accessible balance valve, when guaranteeing efficiency, further avoids causing the loss of absorption liquid because of using this differential pressure measuring device.
In this embodiment, need when the pressure pipeline is direct to be put through, can open the balanced valve realizes the malleation measuring chamber with the switch-on of negative pressure measuring chamber, it is concrete, when gas blowing device blows to the pressure pipeline, open the balanced valve of three valves 11, gas that gas blowing device produced directly passes through the absorbed liquid that the balanced valve will be in the pressure pipeline is followed pressure valve 5 blows off down, and quick realization pressure pipeline and the interior amine liquid of isolation tank are retrieved, avoid causing the loss of absorbed liquid because of using this differential pressure measuring device.
In some embodiments, the height of the bottom surface of the negative isolation tank 3 relative to the ground and the height of the bottom surface of the positive isolation tank 2 relative to the ground are both higher than the height of the differential pressure measurement assembly 1 relative to the ground, and the relative positions of the positive and negative isolation tanks 3 and the differential pressure measurement assembly 1 ensure that the isolation liquid in the positive and negative isolation tanks 3 can flow to the positive pressure end and the negative pressure end of the differential pressure measurement assembly 1 along the pressure taking pipeline, so that the measurement accuracy is ensured.
As shown in fig. 3, the embodiment of the present invention further provides a differential pressure measurement system of a regeneration tower 7, including the above differential pressure measurement device and the regeneration tower 7, where the differential pressure measurement device is connected to a sidewall of the regeneration tower 7.
Specifically, the lateral wall of regeneration tower 7 is provided with first interface and second interface along the direction of height, first interface be used for with differential pressure measuring device's last pressure taking valve 4 is connected, the second interface be used for with differential pressure measuring device's lower pressure taking valve 5 is connected, the height of first interface for ground is higher than the height of second interface for ground.
The distance between the first interface and the second interface along the height direction of the regeneration tower 7 is H, the measurement range of the differential pressure measurement assembly 1 in the differential pressure measurement device is 0-X, and based on the regeneration tower 7 differential pressure measurement system, the measurement range of the regeneration tower 7 differential pressure measurement system is: rho gH-rho gH + X, wherein rho is the density of the absorption liquid in the regeneration tower 7, and g is the gravity acceleration.
In some embodiments, the regeneration tower 7, the positive isolation tank 2, and the negative isolation tank 3 all contain an absorption liquid.
Specifically, the absorption liquid is an amine liquid.
The invention also discloses a blockage detection method and a dredging method of the regeneration tower pressure tapping pipeline, which comprise the following steps:
s1: closing the upper pressure taking valve 4 and the lower pressure taking valve 5;
s2: opening the manual valve 62;
s3: checking whether a positive pressure side valve, a negative pressure side valve and a balance valve of the three valve group 11 are in an open state, and if not, opening the corresponding valves of the three valve group 11;
s4: opening a positive pressure side blow-off valve 23 of the positive isolation tank 2, and checking whether airflow is discharged from a discharge port of the positive pressure side blow-off valve 23;
s5: closing a positive pressure side blow-off valve, opening a negative pressure side blow-off valve 33 of the negative isolation tank 3, and checking whether airflow is discharged from a discharge port of the negative pressure side blow-off valve 33;
s6: according to the gas discharge condition, the pipeline blockage condition is judged, and if the blockage is judged, the purging time is prolonged.
The invention also discloses a using method of the regeneration tower measuring system, which comprises the following steps:
s1: closing the upper pressure taking valve 4 and the lower pressure taking valve 5, and opening the exhaust plug 34 of the negative isolation tank;
s2: opening the lower pressure taking valve 5 and the positive pressure side valve, the negative pressure side valve and the balance valve of the three valve groups 11 until a solution is at the exhaust port of the negative pressure side isolation tank;
s3: closing the lower pressure taking valve 5 and the negative isolation tank exhaust plug 34 of the negative isolation tank 3;
s4: closing the balance valves of the three valve groups 11, if the measured value of the differential pressure transmitter is zero or the displayed value meets the error range, indicating that the negative pressure side pipeline is full of solution and no gas column exists, opening the pressure sampling valves 4 and 5, and putting the differential pressure measuring system into operation; and if the measured value of the differential pressure transmitter is not zero or the displayed value exceeds the error range, opening the balance valve of the three valve groups 11, opening the manual valve 62 of the blowing device for five seconds, and expelling the gas column in the pipeline by using the pressure of nitrogen. Closing the balance valve, opening the pressure sampling valves 4 and 5, and putting the differential pressure measurement system into operation.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A regenerator differential pressure measurement device, comprising:
a differential pressure measurement assembly (1), the differential pressure measurement assembly (1) comprising a positive pressure end and a negative pressure end;
the positive isolation tank (2) comprises a positive sampling port (21) used for being connected with a to-be-detected end and a positive sample outlet (22) connected with a positive pressure end of the differential pressure measurement assembly (1), the positive sampling port (21) is arranged on the side face of the positive isolation tank (2), and the positive sample outlet (22) is arranged at the bottom of the positive isolation tank (2);
the negative isolation tank (3), the negative isolation tank (3) comprises a negative sampling port (31) used for being connected with a to-be-measured end, and a negative sample outlet (32) connected with the negative pressure end of the differential pressure measurement assembly (1), the negative sampling port (31) is arranged on the side surface of the negative isolation tank (3), and the negative sample outlet (32) is arranged at the bottom of the negative isolation tank (3);
the positive isolation tank (2) and the negative isolation tank (3) are used for containing isolation liquid.
2. A regenerator differential pressure measuring device according to claim 1, characterized in that the positive separator tank (2) and the negative separator tank (3) are filled with a separator fluid.
3. A regenerator column differential pressure measuring device according to claim 1, further comprising an upper pressure-taking valve (4) connected to the negative sampling port (31), and a lower pressure-taking valve (5) connected to the positive sampling port (21).
4. A regenerator column differential pressure measuring device according to claim 3, characterized in that the upper pressure-tapping valve (4) and the lower pressure-tapping valve (5) are ball valves.
5. A regenerator differential pressure measuring device according to claim 1, further comprising a gas blowing device comprising a manual valve (62); one end of the manual valve (62) is connected with the negative sampling port (31), and the other end of the manual valve is used for being connected with a nitrogen system.
6. A regenerator differential pressure measuring device according to claim 1, characterized in that the height of the bottom surface of the negative insulated tank (3) relative to the ground is higher than the height of the top surface of the positive insulated tank (2) relative to the ground.
7. A regenerator column differential pressure measuring device according to claim 1, characterized in that the differential pressure measuring assembly (1) further comprises a three-valve set (11), the three-valve set (11) comprising a positive pressure measuring chamber, a negative pressure measuring chamber and a balance valve; the positive pressure measuring chamber of three valves (11) with the positive pressure end intercommunication of differential pressure measuring subassembly (1), the negative pressure measuring chamber of three valves (11) with the negative pressure end intercommunication of differential pressure measuring subassembly (1), the balanced valve intercommunication positive pressure measuring chamber and negative pressure measuring chamber.
8. A regenerator differential pressure measuring device according to claim 1, characterized in that the height of the bottom surface of the negative insulated tank (3) relative to the ground and the height of the bottom surface of the positive insulated tank (2) relative to the ground are both higher than the height of the differential pressure measuring assembly (1) relative to the ground.
9. A differential pressure measuring system of a regeneration tower, characterized in that it comprises a differential pressure measuring device according to any one of claims 1 to 8, a regeneration tower (7), said differential pressure measuring device being connected to the side wall of said regeneration tower (7).
10. A regenerator differential pressure measuring system according to claim 9, characterized in that the regenerator (7), the positive separator tank (2) and the negative separator tank (3) are filled with a doctor solution.
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| CN202110453514.2A CN113155349B (en) | 2021-04-26 | 2021-04-26 | Differential pressure measuring device and differential pressure measuring system for regeneration tower |
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| CN113155349B CN113155349B (en) | 2023-07-18 |
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