CN116531914A - Gas drying process and system - Google Patents
Gas drying process and system Download PDFInfo
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- CN116531914A CN116531914A CN202310567169.4A CN202310567169A CN116531914A CN 116531914 A CN116531914 A CN 116531914A CN 202310567169 A CN202310567169 A CN 202310567169A CN 116531914 A CN116531914 A CN 116531914A
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- 238000001035 drying Methods 0.000 title claims abstract description 284
- 238000001179 sorption measurement Methods 0.000 claims abstract description 100
- 230000008929 regeneration Effects 0.000 claims abstract description 59
- 238000011069 regeneration method Methods 0.000 claims abstract description 59
- 238000007664 blowing Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 224
- 239000002994 raw material Substances 0.000 claims description 74
- 239000007788 liquid Substances 0.000 claims description 17
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003463 adsorbent Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 125000004122 cyclic group Chemical group 0.000 abstract description 4
- 238000003795 desorption Methods 0.000 abstract description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002274 desiccant Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0438—Cooling or heating systems
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0446—Means for feeding or distributing gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40086—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by using a purge gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a gas drying process and a gas drying system, which belong to the technical field of gas drying. And 3 drying towers are provided with one drying tower in an adsorption step, one drying tower in a regeneration step and one drying tower in a cold blowing step, wherein each drying tower sequentially carries out adsorption, regeneration and cooling processes so as to realize continuous drying of gas, and the raw gas is returned to the drying tower in the adsorption step after cold blowing and regeneration, so that a lossless drying process is realized. The time of the regeneration step and the cold blowing step is equal to that of the adsorption step, the optimal cooperation of adsorption and desorption is achieved, the volume of a drying tower can be reduced by more than 30%, the raw gas is subjected to the cold blowing step, the raw gas can be initially heated, the cyclic utilization of heat is realized, and the energy consumption of a heater is reduced.
Description
Technical Field
The invention relates to the technical field of gas drying, in particular to a gas drying process and a gas drying system.
Background
When the gas is transported, if the gas contains high humidity, the moisture in the gas can become condensed water or even freeze due to temperature reduction, so that the gas is transported abnormally. For example, the existence of water in natural gas and hydrogen can reduce the conveying capacity of a pipeline, lower the heat value of the gas, even block the pipeline, increase the pressure drop, cause air pressure fluctuation and influence the stability of air supply. Therefore, the gas needs to be dried.
There are many methods for drying gas, including dehydration using a liquid absorbent such as sulfuric acid, lithium chloride, etc., dehydration using a chemical solid desiccant such as calcium chloride, sodium hydroxide, etc., dehydration using a porous solid desiccant such as a molecular sieve, activated carbon, etc., and dehydration using direct low-temperature freeze water. Temperature swing adsorption drying processes for porous solid desiccants are commonly used in the industry.
The regeneration step and the cold blowing step of the conventional adsorption drying process are contradictory, so that the regeneration time of the drying tower is short, the regeneration effect is poor, the effective guarantee for the next adsorption cannot be made, and the continuous adsorption drying step is difficult to realize; and when the drying tower is cold blown, heat is not recovered, heat loss is caused, and the energy consumption of the heater is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a gas drying process and a system, wherein the system is provided with 3 identical drying towers, the 3 drying towers simultaneously carry out an adsorption step, a regeneration step and a cold blowing step, the time of the regeneration step and the cold blowing step is equal to that of the adsorption step of the drying towers, the optimal matching of adsorption and desorption can be achieved, the volume of the drying towers can be effectively reduced by more than 30%, in addition, the raw material gas enters the drying towers of the cold blowing step, the raw material gas can be initially heated, the cyclic utilization of heat is realized, and the energy consumption of a heater is reduced.
The technical scheme adopted by the invention is as follows:
a gas drying process comprising:
s1, performing an adsorption step by a drying tower A, performing a cold blowing step by a drying tower B, and performing a regeneration step by a drying tower C;
dividing the raw material gas into two parts, and leading one part into a drying tower A for adsorption drying, and discharging after drying to obtain product gas; the other feed gas enters a drying tower B to cool the adsorption bed layer of the drying tower B, and then enters a drying tower C to regenerate the adsorption bed layer of the drying tower C after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas;
s2, performing a regeneration step after adsorption saturation of the drying tower A, performing an adsorption step after cooling of the drying tower B, and performing a cold blowing step after regeneration of the drying tower C;
one strand of raw material gas enters a drying tower B for adsorption drying, and the product gas is obtained after drying; the other feed gas enters a drying tower C to cool the adsorption bed layer of the drying tower C, and then enters a drying tower A to regenerate the adsorption bed layer of the drying tower A after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas;
s3, performing a cold blowing step after regenerating the drying tower A, performing a regenerating step after adsorbing saturation of the drying tower B, and performing an adsorbing step after cooling the drying tower C;
one strand of raw material gas enters a drying tower C for adsorption drying, and the product gas is obtained after drying; the other feed gas enters a drying tower A to cool an adsorption bed layer of the drying tower A, and then enters a drying tower B to be regenerated after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas;
and S4, repeating the steps to realize continuous adsorption, regeneration and cold blowing processes of the drying tower A, the drying tower B and the drying tower C.
In the gas drying process disclosed in the application, the regenerated gas and the raw material gas are combined and then subjected to an adsorption drying step.
In the gas drying process disclosed herein, two of the feed gases are simultaneously fed into the drying column.
In the gas drying process disclosed in the present application, the time of the regeneration step and the cold blowing step is equal to the time of the adsorption step.
Based on the same inventive concept, the present application also provides a system for implementing the above gas drying process, in particular, a gas drying system, comprising 3 drying towers connected to each other by a process line and a valve assembly;
an adsorption bed layer is arranged in the drying tower;
the process pipeline is provided with a raw material gas pipeline, a product gas pipeline, a regeneration pipeline and a circulating pipeline;
the raw material gas pipeline and the product gas pipeline are respectively connected with 3 drying towers, raw material gas enters the drying towers through the raw material gas pipeline, the product gas is obtained after adsorption drying, and the product gas is discharged from the product gas pipeline;
the two ends of the regeneration pipeline are connected with 3 drying towers, and the regeneration pipeline is provided with a heater, so that raw material gas enters one drying tower to blow down an adsorption bed layer, passes through the regeneration pipeline, is heated by the heater, and enters the other drying tower to regenerate the adsorption bed layer;
one end of the circulating pipeline is connected with 3 drying towers, the other end of the circulating pipeline is connected with the raw material gas pipeline, and a condenser and a gas-liquid separator are arranged on the circulating pipeline, so that regenerated gas in one drying tower passes through the circulating pipeline, is cooled by the condenser and is separated by the gas-liquid separator, and then returns to the raw material gas pipeline;
one of the drying tower A, the drying tower B and the drying tower C is always in an adsorption step, one is in a regeneration step, and the other is in a cold blowing step, so that continuous adsorption, regeneration and cooling are realized.
In the gas drying system disclosed herein, the feed gas conduit has a first feed gas manifold and a second feed gas manifold; the first raw material gas branch pipe and the second raw material gas branch pipe are respectively connected with 3 drying towers, so that one part of raw material gas can enter one drying tower through the first raw material gas branch pipe to carry out an adsorption step, and the other part of raw material gas can enter the other drying tower through the second raw material gas branch pipe to carry out a cold blowing step.
In the gas drying system disclosed in the application, the circulating pipeline is connected with the first raw gas branch pipe, so that the cooled and separated regenerated gas returns to the first raw gas branch pipe to be subjected to the adsorption step.
In the gas drying system disclosed by the application, the first raw material gas branch pipe is communicated with the top of the drying tower, the product gas pipeline is communicated with the bottom of the drying tower, so that raw material gas passing through the first raw material gas branch pipe enters from the top of the drying tower, flows downwards, is adsorbed by the adsorption bed layer and is discharged from the bottom through the product gas pipeline.
In the gas drying system disclosed by the application, the second raw material gas branch pipe is communicated with the top of 3 drying towers, the two ends of the regeneration pipeline are communicated with the bottom of 3 drying towers, so that raw material gas passing through the second raw material gas pipeline enters from the top of one drying tower, flows downwards to blow-cool the adsorption bed layer and then is discharged from the bottom, and enters another drying tower through the regeneration pipeline.
In the gas drying system disclosed in the application, the circulating pipeline is communicated with the top parts of 3 drying towers, so that the raw material gas passing through the regeneration pipeline enters from the bottom part of one drying tower, flows from bottom to top to regenerate the adsorption bed layer, and then is discharged from the top part to enter the circulating pipeline.
Compared with the prior art, the invention has the beneficial effects that:
(1) The method has the advantages that 3 drying towers which are the same are arranged, one drying tower is always in an adsorption step, one drying tower is in a regeneration step, and one drying tower is in a cold blowing step, so that continuous drying of gas is realized, and meanwhile, regenerated gas returns to the drying tower in the adsorption step, and a lossless drying process without consumption of raw gas is realized.
(2) The regeneration step and the cold blowing step of the drying tower are carried out in the same time as the adsorption step of the drying tower, so that the best cooperation of adsorption and desorption is achieved, and the volume of the drying tower can be effectively reduced by more than 30%.
(3) The method completely solves the contradiction relation between the regeneration step and the cold blowing step of the conventional lossless drying process, and can cool the drying tower to normal temperature to effectively ensure the next adsorption.
(4) The drying tower that this application raw materials gas advanced to get into the cold blowing step can be to the preliminary heating of raw materials gas, realizes the cyclic utilization of heat, reduces the energy consumption of heater.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gas drying system;
FIG. 2 is a schematic diagram of a process flow of the system;
FIG. 3 is a second schematic diagram of a process flow of the system;
fig. 4 is a process flow diagram of a system.
Reference numerals:
10. a feed gas conduit; 11. a first feed gas manifold; 12. a second feed gas manifold;
20. a product gas conduit;
30. a regeneration pipe; 31. a heater;
40. a circulation pipe; 41. a condenser; 42. a gas-liquid separator.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, an embodiment of the present application provides a gas drying system comprising a drying tower a, a drying tower B, and a drying tower C interconnected by a process line and a valve assembly. The drying towers A, B and C are 3 identical drying towers, and an adsorption bed layer is arranged in each drying tower. The valve A-1~A-6 is arranged on the process pipeline of the drying tower A, the valve B-1~B-6 is arranged on the process pipeline of the drying tower B, and the valve C-1~C-6 is arranged on the process pipeline of the drying tower C.
The process line has a feed gas line 10, a product gas line 20, a regeneration line 30, and a recycle line 40.
Wherein, the raw material gas pipeline 10 and the product gas pipeline 20 are respectively connected with the drying tower A, the drying tower B and the drying tower C, the raw material gas enters the drying tower through the raw material gas pipeline 10, the product gas is obtained after adsorption drying, and the product gas is discharged from the product gas pipeline 20.
The two ends of the regeneration pipeline 30 are respectively connected with the drying tower A, the drying tower B and the drying tower C, and the heater 31 is arranged on the regeneration pipeline 30, so that the raw material gas enters one drying tower to blow down the adsorption bed layer, passes through the regeneration pipeline 30, and enters the other drying tower to regenerate the adsorption bed layer after being heated by the heater 31.
One end of the circulation pipeline 40 is connected with the drying A, the drying tower B and the drying tower C, the other end of the circulation pipeline 40 is connected with the raw material gas pipeline 10, and the condenser 41 and the gas-liquid separator 42 are arranged on the circulation pipeline 40, so that the regenerated gas in one drying tower returns to the raw material gas pipeline 10 after being cooled by the condenser 41 and separated by the gas-liquid separator 42 through the circulation pipeline 40.
One of the drying tower A, the drying tower B and the drying tower C is always in an adsorption step, one is in a regeneration step, and the other is in a cold blowing step, so that continuous adsorption, regeneration and cooling are realized.
Specifically, the feed gas pipe 10 has a first feed gas branch pipe 11 and a second feed gas branch pipe 12, and the first feed gas branch pipe 11 and the second feed gas branch pipe 12 are connected to the drying tower a, the drying tower B, and the drying tower C, respectively, so that a part of feed gas can enter one drying tower through the first feed gas branch pipe 11 to perform the adsorption step, and another part of feed gas can enter the other drying tower through the second feed gas branch pipe 12 to perform the cold blowing step.
Specifically, the circulation line 40 is connected to the first raw material gas branch pipe 11 so that the cooled, separated regenerated gas is returned to the first raw material gas branch pipe 11 to perform the adsorption step.
Specifically, the first raw material gas branch pipe 11 is communicated with the top of the drying tower a, the drying tower B and the drying tower C, and the product gas pipeline 20 is communicated with the bottom of the drying tower a, the drying tower B and the drying tower C, so that the raw material gas passing through the first raw material gas branch pipe 11 enters from the top of the drying tower, flows downwards, is adsorbed by the adsorption bed layer and is discharged from the bottom through the product gas pipeline 20.
Specifically, the second raw material gas branch pipe 12 is communicated with the top of the drying tower a, the drying tower B and the drying tower C, and two ends of the regeneration pipeline 30 are communicated with the bottoms of the drying tower a, the drying tower B and the drying tower C, so that raw material gas passing through the second raw material gas pipeline 10 enters from the top of one drying tower, flows downwards to blow-cool the adsorption bed layer, is discharged from the bottom, and enters into the other drying tower through the regeneration pipeline 30.
Specifically, the circulation duct 40 communicates with the tops of the drying tower a, the drying tower B, and the drying tower C, so that the raw material gas passing through the regeneration duct 30 enters from the bottom of a drying tower, flows from the bottom to the top to regenerate the adsorption bed, and then is discharged from the top into the circulation duct 40.
The gas drying process based on the system comprises the following steps of:
step S1, a drying tower A carries out an adsorption step, a drying tower B carries out a cold blowing step, a drying tower C carries out a regeneration step, and the method is shown in FIG. 2;
dividing the raw material gas into two parts, and leading one part into a drying tower A for adsorption drying, and discharging after drying to obtain product gas; simultaneously, the other feed gas enters a drying tower B to cool an adsorption bed layer of the drying tower B, and then enters a drying tower C to regenerate the adsorption bed layer of the drying tower C after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas, and enters a drying tower A for adsorption;
step S2, when the drying tower A is saturated in adsorption, the regeneration step is carried out, the drying tower B is cooled, the adsorption step is carried out, and the cooling blowing step is carried out after the drying tower C is regenerated, as shown in FIG. 3;
one strand of raw material gas enters a drying tower B for adsorption drying, and the product gas is obtained after drying; simultaneously, the other feed gas enters a drying tower C to cool the adsorption bed layer of the drying tower C, and then enters a drying tower A to regenerate the adsorption bed layer of the drying tower A after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas, and enters a drying tower B for adsorption;
step S3, when the drying tower A is regenerated, a cold blowing step is carried out, and when the drying tower B is saturated in adsorption, a regeneration step is carried out, and when the drying tower C is cooled, an adsorption step is carried out, as shown in FIG. 4;
one strand of raw material gas enters a drying tower C for adsorption drying, and the product gas is obtained after drying; simultaneously, the other feed gas enters a drying tower A to cool the adsorption bed layer of the drying tower A, and then enters a drying tower B to regenerate the adsorption bed layer of the drying tower B after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas, and enters a drying tower C for adsorption;
and S4, repeating the steps to realize continuous adsorption, regeneration and cold blowing processes of the drying tower A, the drying tower B and the drying tower C.
The method has 3 identical drying towers, one of the 3 drying towers is always in an adsorption step, one of the 3 drying towers is in a regeneration step, and the other of the 3 drying towers is in a cold blowing step, so that continuous drying of gas is realized, and meanwhile, the regenerated gas returns to the drying tower in the adsorption step, so that a lossless drying process without consumption of raw gas is realized; the regeneration step and the cold blowing step of the drying tower are carried out in the same time as the adsorption step of the drying tower, so that the best cooperation of adsorption and desorption is achieved, and the volume of the drying tower can be effectively reduced by more than 30%. The method completely solves the contradiction relation between the regeneration step and the cold blowing step of the conventional lossless drying process, and can effectively ensure that the drying tower is cooled to normal temperature for the next adsorption; and the raw material gas firstly enters a drying tower in the cold blowing step, so that the raw material gas can be initially heated, the cyclic utilization of heat is realized, and the energy consumption of a heater is reduced.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A gas drying process comprising:
s1, performing an adsorption step by a drying tower A, performing a cold blowing step by a drying tower B, and performing a regeneration step by a drying tower C;
dividing the raw material gas into two parts, and leading one part into a drying tower A for adsorption drying, and discharging after drying to obtain product gas; the other feed gas enters a drying tower B to cool the adsorption bed layer of the drying tower B, and then enters a drying tower C to regenerate the adsorption bed layer of the drying tower C after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas;
s2, performing a regeneration step after adsorption saturation of the drying tower A, performing an adsorption step after cooling of the drying tower B, and performing a cold blowing step after regeneration of the drying tower C;
one strand of raw material gas enters a drying tower B for adsorption drying, and the product gas is obtained after drying; the other feed gas enters a drying tower C to cool the adsorption bed layer of the drying tower C, and then enters a drying tower A to regenerate the adsorption bed layer of the drying tower A after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas;
s3, performing a cold blowing step after regenerating the drying tower A, performing a regenerating step after adsorbing saturation of the drying tower B, and performing an adsorbing step after cooling the drying tower C;
one strand of raw material gas enters a drying tower C for adsorption drying, and the product gas is obtained after drying; the other feed gas enters a drying tower A to cool an adsorption bed layer of the drying tower A, and then enters a drying tower B to be regenerated after being heated to obtain regenerated gas; the regenerated gas is cooled and separated from gas and liquid, and then returned to be converged with the raw material gas;
and S4, repeating the steps to realize continuous adsorption, regeneration and cold blowing processes of the drying tower A, the drying tower B and the drying tower C.
2. The gas drying process according to claim 1, wherein the regeneration gas is combined with the raw material gas and then subjected to an adsorption drying step.
3. The gas drying process according to claim 1, wherein two of the feed gases are simultaneously fed into the drying column.
4. The gas drying process according to claim 1, wherein the regeneration step and the cold blowing step are performed for a time equal to the adsorption step.
5. A gas drying system for implementing the gas drying process according to any one of claims 1 to 4, comprising 3 drying towers connected to each other by a process line and a valve assembly;
an adsorption bed layer is arranged in the drying tower;
the process pipeline is provided with a raw material gas pipeline, a product gas pipeline, a regeneration pipeline and a circulating pipeline;
the raw material gas pipeline and the product gas pipeline are respectively connected with 3 drying towers, raw material gas enters the drying towers through the raw material gas pipeline, the product gas is obtained after adsorption drying, and the product gas is discharged from the product gas pipeline;
the two ends of the regeneration pipeline are connected with 3 drying towers, and the regeneration pipeline is provided with a heater, so that raw material gas enters one drying tower to blow down an adsorption bed layer, passes through the regeneration pipeline, is heated by the heater, and enters the other drying tower to regenerate the adsorption bed layer;
one end of the circulating pipeline is connected with 3 drying towers, the other end of the circulating pipeline is connected with the raw material gas pipeline, and a condenser and a gas-liquid separator are arranged on the circulating pipeline, so that regenerated gas in one drying tower passes through the circulating pipeline, is cooled by the condenser and is separated by the gas-liquid separator, and then returns to the raw material gas pipeline;
one of the drying tower A, the drying tower B and the drying tower C is always in an adsorption step, one is in a regeneration step, and the other is in a cold blowing step, so that continuous adsorption, regeneration and cooling are realized.
6. The gas drying system of claim 5, wherein the feed gas conduit has a first feed gas manifold and a second feed gas manifold; the first raw material gas branch pipe and the second raw material gas branch pipe are respectively connected with 3 drying towers, so that one part of raw material gas can enter one drying tower through the first raw material gas branch pipe to carry out an adsorption step, and the other part of raw material gas can enter the other drying tower through the second raw material gas branch pipe to carry out a cold blowing step.
7. The gas drying system of claim 6, wherein the circulation line is connected to the first feed gas manifold such that the cooled, separated regeneration gas is returned to the first feed gas manifold for the adsorption step.
8. The gas drying system of claim 6, wherein the first feed gas manifold is in communication with the top of 3 of the drying towers, and the product gas conduit is in communication with the bottom of 3 of the drying towers, such that feed gas passing through the first feed gas manifold enters from the top of the drying towers, flows downward, is adsorbed by the adsorbent bed, and is discharged from the bottom through the product gas conduit.
9. The gas drying system according to claim 6, wherein the second raw gas branch pipe is communicated with the top of 3 drying towers, both ends of the regeneration pipeline are communicated with the bottom of 3 drying towers, so that raw gas passing through the second raw gas pipeline enters from the top of one drying tower, flows downwards to blow-cool the adsorption bed layer, is discharged from the bottom, and enters another drying tower through the regeneration pipeline.
10. The gas drying system according to claim 9, wherein the circulation line is in communication with the top of 3 of the drying towers such that feed gas passing through the regeneration line enters from the bottom of a drying tower, flows from the bottom up to regenerate the adsorption bed, and then exits from the top into the circulation line.
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| CN202310567169.4A CN116531914A (en) | 2023-05-19 | 2023-05-19 | Gas drying process and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117046271A (en) * | 2023-09-21 | 2023-11-14 | 江苏新凯晟机械设备有限公司 | Low dew point waste heat regeneration compressed air drying device |
| CN117165346A (en) * | 2023-10-27 | 2023-12-05 | 陕西航天德林科技集团有限公司 | Natural gas dehydration and mercury removal method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103254955A (en) * | 2013-05-02 | 2013-08-21 | 中国海洋石油总公司 | Closed-type three-tower molecular sieve dehydration device |
| CN115957591A (en) * | 2021-10-12 | 2023-04-14 | 中国石油天然气股份有限公司 | Device and method for dehydrating and regenerating wet ethane gas by adopting molecular sieve tower |
-
2023
- 2023-05-19 CN CN202310567169.4A patent/CN116531914A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103254955A (en) * | 2013-05-02 | 2013-08-21 | 中国海洋石油总公司 | Closed-type three-tower molecular sieve dehydration device |
| CN115957591A (en) * | 2021-10-12 | 2023-04-14 | 中国石油天然气股份有限公司 | Device and method for dehydrating and regenerating wet ethane gas by adopting molecular sieve tower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117046271A (en) * | 2023-09-21 | 2023-11-14 | 江苏新凯晟机械设备有限公司 | Low dew point waste heat regeneration compressed air drying device |
| CN117046271B (en) * | 2023-09-21 | 2024-02-06 | 江苏新凯晟机械设备有限公司 | Low dew point waste heat regeneration compressed air drying device |
| CN117165346A (en) * | 2023-10-27 | 2023-12-05 | 陕西航天德林科技集团有限公司 | Natural gas dehydration and mercury removal method |
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Application publication date: 20230804 |