CN116637606A - Regeneration method of resin adsorption bed layer in sulfur-ammonia-containing sewage treatment process - Google Patents
Regeneration method of resin adsorption bed layer in sulfur-ammonia-containing sewage treatment process Download PDFInfo
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- CN116637606A CN116637606A CN202310568568.2A CN202310568568A CN116637606A CN 116637606 A CN116637606 A CN 116637606A CN 202310568568 A CN202310568568 A CN 202310568568A CN 116637606 A CN116637606 A CN 116637606A
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- toluene
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- 239000011347 resin Substances 0.000 title claims abstract description 140
- 229920005989 resin Polymers 0.000 title claims abstract description 140
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000011069 regeneration method Methods 0.000 title claims abstract description 36
- 239000010865 sewage Substances 0.000 title claims abstract description 30
- AQGDXJQRVOCUQX-UHFFFAOYSA-N N.[S] Chemical compound N.[S] AQGDXJQRVOCUQX-UHFFFAOYSA-N 0.000 title claims abstract description 24
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 181
- 239000007788 liquid Substances 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000002245 particle Substances 0.000 claims abstract description 49
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 238000002791 soaking Methods 0.000 claims abstract description 13
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 26
- 229910021529 ammonia Inorganic materials 0.000 claims description 13
- 229910052717 sulfur Inorganic materials 0.000 claims description 13
- 239000011593 sulfur Substances 0.000 claims description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 12
- 238000011049 filling Methods 0.000 claims description 11
- 230000001172 regenerating effect Effects 0.000 claims description 11
- 238000004065 wastewater treatment Methods 0.000 claims 8
- 230000008929 regeneration Effects 0.000 description 25
- 239000012535 impurity Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 19
- 238000011010 flushing procedure Methods 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 238000010828 elution Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000007233 catalytic pyrolysis Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000001767 cationic compounds Chemical class 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 229910001412 inorganic anion Inorganic materials 0.000 description 1
- 229910001411 inorganic cation Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3425—Regenerating or reactivating of sorbents or filter aids comprising organic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
- B01J20/3466—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase with steam
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The application discloses a regeneration method of a resin adsorption bed layer in a sulfur-ammonia-containing sewage treatment process, which comprises the following steps: s1, opening an upper inlet and a lower outlet, injecting water from the upper inlet, and then collecting liquid flowing out from the lower outlet; s2, stopping water injection, injecting toluene from an upper inlet, standing for soaking after the toluene fully infiltrates the resin particles, continuously injecting toluene from the upper inlet, collecting liquid flowing out from a lower outlet until the liquid flowing out from the lower outlet is transparent, and stopping injecting toluene; s3, injecting nitrogen from an upper inlet, and collecting liquid flowing out from a lower outlet; stopping injecting nitrogen after no liquid flows out from the lower outlet, blowing superheated steam from the upper inlet, cooling and collecting the liquid flowing out from the lower outlet; s4, stopping injecting superheated steam, injecting water from an outlet at the lower part, stopping injecting water when the inside of the shell of the resin adsorption bed layer is full of liquid, and standing until the resin particles are uniformly dispersed.
Description
Technical Field
The application relates to the technical field of adsorption resin recycling, in particular to a method for recycling a resin adsorption bed layer in a sulfur-ammonia-containing sewage treatment process.
Background
The sulfur-ammonia-containing sewage can be generated in the heavy oil catalytic pyrolysis process, and the current commonly used sulfur-ammonia-containing sewage treatment process comprises the following steps: firstly, skimming the floating oil in the sulfur-ammonia-containing sewage, and then adsorbing organic matters in the sulfur-ammonia-containing sewage through a resin adsorption bed layer, so that the sulfur-ammonia-containing sewage can be subjected to the next process treatment.
In the working process of the resin adsorption bed, impurities adsorbed by the internal resin can be gradually accumulated to block holes on the surface and in the resin, so that the adsorption purification capacity of the resin adsorption bed is gradually deteriorated; when the oil content in the liquid flowing out from the outlet at the lower part of the resin adsorption bed layer is too high, the resin inside the resin adsorption bed layer is required to be regenerated to restore the original adsorption capacity.
At present, in the adsorption treatment process of the sulfur-containing ammonia sewage by the heavy oil catalytic pyrolysis process, the main problem is that after the resin is regenerated once or for a plurality of times, impurities in holes of the resin still cannot be effectively removed and the original adsorption quantity of the resin cannot be recovered due to incomplete regeneration, so that the service cycle and service life of the resin are very limited, and the practical application effect of a resin adsorption bed in the sulfur-containing ammonia sewage treatment process is affected.
Disclosure of Invention
The embodiment of the application solves the problems of limited service cycle and service life and influence on the practical application effect caused by incomplete regeneration in the existing resin adsorption bed regeneration process by providing the regeneration method of the resin adsorption bed in the sulfur-containing ammonia sewage treatment process, and realizes the technical effects of being capable of quickly regenerating the resin bed after adsorbing impurities, ensuring thorough regeneration and ensuring that the resin can recover more ideally or be close to the original adsorption quantity.
The embodiment of the application provides a regeneration method of a resin adsorption bed layer in a sulfur-ammonia-containing sewage treatment process, wherein the resin adsorption bed layer comprises a cylindrical shell and a plurality of resin particles filled in the shell, and the shell is provided with an upper inlet and a lower outlet; the regeneration method of the resin adsorption bed layer in the sulfur ammonia-containing sewage treatment process provided by the embodiment comprises the following steps:
s1, opening an upper inlet and a lower outlet of a resin adsorption bed layer after adsorption of sulfur-ammonia-containing sewage, injecting water from the upper inlet, collecting liquid flowing out from the lower outlet, and filling the liquid into a container;
s2, stopping injecting water, injecting toluene from an upper inlet after no liquid flows out from a lower outlet, standing and soaking after the toluene is fully soaked in resin particles, continuously injecting toluene from the upper inlet and collecting the liquid flowing out from the lower outlet until the liquid flowing out from the lower outlet is transparent, stopping injecting toluene, and filling the collected liquid into the container;
s3, injecting nitrogen from an upper inlet, collecting liquid flowing out from a lower outlet and filling the liquid into a container; stopping injecting nitrogen after no liquid flows out from the lower outlet, blowing superheated steam from the upper inlet, collecting the liquid flowing out from the lower outlet, cooling, and filling into the container;
s4, stopping injecting superheated steam, injecting water from an outlet at the lower part, stopping injecting water when the inside of the shell of the resin adsorption bed layer is full of liquid, and standing until the resin particles are uniformly dispersed.
In one possible implementation of the present application,
in S1, the internal pressure of the resin adsorption bed layer is controlled to be 0.1MPa.
In one possible implementation of the present application,
the water injected in S1 is desalted water.
In one possible implementation of the present application,
s2, controlling the internal pressure of the vertical adsorption bed layer to be 0.1MPa when toluene is injected.
In one possible implementation of the present application,
and S2, fully soaking the resin particles in toluene, and standing and soaking for 60-70 min.
In one possible implementation of the present application,
s2, toluene flow rate at the time of continuous injection of toluene was 0.2m 3 /h。
In one possible implementation of the present application,
the duration of continuous injection of toluene is not less than 50min.
In one possible implementation of the present application,
the temperature of the superheated steam blown in S3 is 110-120 ℃.
In one possible implementation of the present application,
the pressure of the superheated steam blown in S3 is 0.2-0.3 MPa.
In one possible implementation of the present application,
the water injected in S4 is demineralized water.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
the regeneration method of the resin adsorption bed layer in the sulfur-ammonia-containing sewage treatment process provided by the embodiment of the application adopts the technical scheme that the resin adsorbed with impurities is sequentially subjected to multistage elution and regeneration by water, toluene and superheated steam, wherein impurities with relatively weak adhesion degree can be washed out from holes and surfaces of the resin by first water washing; toluene soaking and continuous flowing flushing can enable toluene to permeate into the resin, and organic impurities adsorbed in the surface and the holes in the resin are fully extracted, dissolved and carried out; the subsequent nitrogen can blow out a small amount of impurities and partial toluene remained in the holes on the surface and in the interior of the resin to be taken away; the superheated steam purging can fully evaporate and carry out residual toluene in the holes on the surface and the inside of the resin; and finally, back flushing the water flow to fully and uniformly mix the resin particles again and cooling. Through the method flow, the embodiment of the application can quickly and efficiently remove the organic impurities adsorbed in the resin particles, and simultaneously can avoid residual impurities and toluene residues generated in the removal and regeneration process, thereby ensuring a more thorough regeneration effect, avoiding the breakage of the resin particles during regeneration or uneven dispersion of the resin particles after regeneration, further improving the regeneration effect, and enabling the adsorption capacity of the resin adsorption bed after regeneration to be as close as possible or even equal to the initial adsorption capacity of the resin adsorption bed.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments of the present application or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and 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 an apparatus used in a certain use scenario in a method for regenerating a resin adsorption bed layer in a sulfur ammonia-containing sewage treatment process according to an embodiment of the present application.
In the figure: 1-a superheated steam line; 2-nitrogen line; a 3-toluene line; 4-sulfur ammonia-containing sewage enters a pipeline; 5-water line; 6-a flare exhaust line; 7-a purified sewage discharge line; 8-a regeneration liquid discharge line; 9-cooler.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the embodiments of the present application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
The embodiment of the application provides a regeneration method of a resin adsorption bed layer in a sulfur-ammonia-containing sewage treatment process, wherein the resin adsorption bed layer comprises a cylindrical shell and a plurality of resin particles filled in the shell, and the shell is provided with an upper inlet and a lower outlet; the regeneration method of the resin adsorption bed layer in the sulfur ammonia-containing sewage treatment process provided by the embodiment comprises the following steps:
s1, opening an upper inlet and a lower outlet of a resin adsorption bed layer after adsorption of sulfur-ammonia-containing sewage, introducing water from a water pipeline 5 connected with the upper inlet, collecting liquid flowing out from a regenerated liquid discharge pipeline 8 connected with the lower outlet, and filling the liquid into a container; the water line 5 is connected with the upper inlet and the lower outlet of the resin adsorption bed layer at the same time, as shown in fig. 1;
s2, stopping injecting water, injecting toluene from a toluene pipeline 3 communicated with an upper inlet after no liquid flows out of a regenerated liquid discharge pipeline 8, standing for soaking after the toluene is fully soaked in resin particles, continuously injecting toluene from the toluene pipeline 3, collecting liquid flowing out of the regenerated liquid discharge pipeline 8 until the liquid flowing out of a regenerated liquid discharge pipeline 9 is transparent, stopping injecting toluene, and filling the collected liquid into the container;
s3, injecting nitrogen into the nitrogen pipeline 2 communicated with the upper inlet, collecting liquid flowing out of the regenerated liquid discharge pipeline 8 and filling the liquid into a container; stopping injecting nitrogen after no liquid flows out of the regenerated liquid discharge pipeline 8, blowing in superheated steam from the superheated steam pipeline 1 communicated with the upper inlet, collecting the liquid flowing out of the regenerated liquid discharge pipeline 8, cooling the liquid by the cooler 9, and loading the liquid into the container;
s4, stopping blowing superheated steam, closing one end of the water pipeline 5, which is communicated with the upper inlet of the resin adsorption bed layer, injecting water from the water pipeline 5, enabling the water to enter the resin adsorption bed layer from one end of the water pipeline 5, which is communicated with the lower outlet of the resin adsorption bed layer, stopping injecting water when the inside of the shell of the resin adsorption bed layer is full of liquid, and then standing until resin particles are uniformly dispersed.
When the resin adsorption bed is used, the sulfur-containing ammonia sewage communicated with the upper inlet of the resin adsorption bed enters the pipeline 4, the sulfur-containing ammonia sewage is introduced, and after the sulfur-containing ammonia sewage is adsorbed and purified by the resin adsorption bed, the sulfur-containing ammonia sewage is discharged from the regenerated liquid discharge pipeline 8 communicated with the lower outlet of the resin adsorption bed.
The regeneration method of the resin adsorption bed layer in the sulfur-ammonia-containing sewage treatment process provided by the embodiment of the application adopts the technical scheme that the resin adsorbed with impurities is sequentially subjected to multistage elution and regeneration by water, toluene and superheated steam, wherein impurities with relatively weak adhesion degree can be washed out from holes and surfaces of the resin by first water washing; toluene soaking and continuous flowing flushing can enable toluene to permeate into the resin, and organic impurities adsorbed in the surface and the holes in the resin are fully extracted, dissolved and carried out; the subsequent nitrogen can blow out a small amount of impurities and partial toluene remained in the holes on the surface and in the interior of the resin to be taken away; the superheated steam purging can fully evaporate and carry out residual toluene in the holes on the surface and the inside of the resin; and finally, back flushing the water flow to fully and uniformly mix the resin particles again and cooling. Through the method flow, the embodiment of the application can quickly and efficiently remove the organic impurities adsorbed in the resin particles, and simultaneously can avoid residual impurities and toluene residues generated in the removal and regeneration process, thereby ensuring a more thorough regeneration effect, avoiding the breakage of the resin particles during regeneration or uneven dispersion of the resin particles after regeneration, further improving the regeneration effect, and enabling the adsorption capacity of the resin adsorption bed after regeneration to be as close as possible or even equal to the initial adsorption capacity of the resin adsorption bed.
It should be noted that, generally, the lower outlet of the resin adsorption bed is higher than the upper inlet, so that a liquid seal is formed to avoid the excessive liquid in the resin adsorption bed from flowing out, and at the same time, the air pressure in the resin adsorption bed can be stabilized. Thus, in this embodiment, the lower outlet does not normally need to be closed when liquid or blowing gas is injected from the upper inlet of the resin adsorbent bed; the formation of a liquid seal at the lower outlet also ensures that when the upper inlet ceases to inject liquid or gas, the flow of liquid outwardly of the lower outlet ceases immediately, thereby avoiding excessive material loss.
In a preferred implementation of this example,
in S1, the internal pressure of the resin adsorption bed layer is controlled to be 0.1MPa.
Specifically, the internal pressure of the resin adsorption bed layer is controlled to be 0.1MPa in the present preferred embodiment, and the main purpose thereof is to: on one hand, the resin particles in the resin adsorption bed layer are prevented from being crushed by fracturing caused by excessive extrusion caused by excessive pressure; on the other hand, the phenomenon that water cannot smoothly enter due to overlarge pressure in the resin adsorption bed layer, so that the water flow cleaning effect is affected is avoided.
In a preferred implementation of this example,
the water injected in S1 is desalted water.
Specifically, demineralized water is water obtained by removing suspended substances, colloids, inorganic cations, anions, and other impurities from water by various water treatment processes. The resin particles in the resin adsorption bed are cleaned for the first time by desalted water, so that the cleaning effect is ensured, and impurities originally contained in water can be prevented from entering holes of the resin particles to further influence the regeneration effect.
In a preferred implementation of this example,
s2, controlling the internal pressure of the vertical adsorption bed layer to be 0.1MPa when toluene is injected.
Specifically, the internal pressure of the resin adsorption bed layer is controlled to be 0.1MPa in the present preferred embodiment, and the main purpose thereof is to: on one hand, the phenomenon that resin particles are broken and toluene cannot smoothly enter the inside of the resin bed layer due to overlarge internal pressure of the resin adsorption bed layer is avoided, and a better elution effect can be realized when the toluene needs to be fully contacted with the resin particles; on the other hand, the phenomenon that the inside pressure of the resin bed layer is too small, and toluene is not fully contacted with resin particles after entering, namely is sucked out of the inside of the resin bed layer under the action of negative pressure, so that the regeneration effect is influenced is avoided.
In a preferred implementation of this example,
and S2, fully soaking the resin particles in toluene, and standing and soaking for 60-70 min.
Specifically, toluene can gradually penetrate into the resin particles to a certain depth when continuously soaked, so that impurities adsorbed in the resin particles are extracted and dissolved, the eluting effect can be greatly improved, and the adsorption capacity of the resin particles is recovered; however, too long soaking time can cause too deep penetration of toluene into the resin particles, and when subsequent flowing flushing of toluene, nitrogen blowing and steam evaporation are carried out, toluene in deeper places can not be effectively removed, and hidden dangers affecting the regeneration effect and the adsorption capacity recovery effect of the resin can exist. The repeated test proves that the soaking time of 60-70 min can better meet the comprehensive requirements.
In a preferred implementation of this example,
s2, toluene flow rate at the time of continuous injection of toluene was 0.2m 3 /h。
Specifically, the flow rate of toluene is not too small but too large, the flow rate is too small, the fluidity of toluene among the resin particles is insufficient, impurities in the resin particles are difficult to sufficiently and effectively wash out in the flowing process, and the flowing and infiltration of toluene are difficult to ensure uniformity; the flow rate is too high and the flow rate is too high,the time for fully contacting toluene with resin particles is short, impurities are difficult to effectively remove, excessive impact force is brought by excessive flow, and resin particles are easy to crack or even break, so that the adsorption performance of the whole resin adsorption bed layer is influenced. Through repeated experiments, the current measurement value is 0.2m 3 The toluene flow per hour can better meet the comprehensive requirements.
In a preferred implementation of this example,
the duration of continuous injection of toluene is not less than 50min.
Specifically, the toluene flow rinse needs to last for a long time to be able to sufficiently contact each resin particle during the flow rinse, and to extract, dissolve and carry out impurities as thoroughly as possible from the surface and the inside thereof.
In a preferred implementation of this example,
the temperature of the superheated steam blown in S3 is 110-120 ℃.
Specifically, superheated steam is blown in the technical scheme of the embodiment of the application, and the aim is mainly to evaporate and carry out toluene which has deeper penetration inside the resin particles, so as to remove residual toluene and ensure the regeneration effect; the boiling point of toluene is about 110 ℃, and the resin particles can generate deformation, aging, fragmentation and other problems at too high temperature, so the preferred embodiment controls the temperature of superheated steam to be 110-120 ℃, so that the toluene in the resin particles can be fully evaporated and carried out, and the structure and the performance of the resin particles are not adversely affected.
In a preferred implementation of this example,
the pressure of the superheated steam blown in S3 is 0.2-0.3 MPa.
In particular, the pressure of the superheated steam is not too high nor too low: the excessive pressure can cause the resin particles to be in high temperature and high pressure, in the environment, the resin particles are easier to generate problems of deformation, aging, fragmentation and the like, and further the regeneration effect and the adsorption performance of the whole resin adsorption bed layer are possibly and negatively influenced; too little pressure may result in insufficient and effective contact of the superheated steam with the individual resin particles, and even there may be cases where the superheated steam has condensed into droplets without contacting the deeper, lower resin particles, and the regeneration effect may be adversely affected. Through repeated experiments, the superheated steam pressure of 0.2-0.3 MPa can be determined to better meet the comprehensive requirements.
In a preferred implementation of this example,
the water injected in S4 is demineralized water.
Specifically, the demineralized water is backwashed, firstly, the resin particles are cooled together to prevent the resin particles from overheating deformation, ageing and cracking, secondly, the resin particles are dispersed and are uniformly dispersed again, and thirdly, the phenomenon that excessive impurities are adsorbed again by the resin particles which are fully cleaned and regenerated originally due to more impurities in water can be avoided.
In this specification, each embodiment is described in a progressive manner, and the same or similar parts of each embodiment are referred to each other, and each embodiment is mainly described as a difference from other embodiments.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the present application; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. The regeneration method of the resin adsorption bed layer in the sulfur ammonia-containing sewage treatment process comprises a cylindrical shell which is vertically arranged, and a plurality of resin particles filled in the shell, wherein the shell is provided with an upper inlet and a lower outlet; the method is characterized by comprising the following steps of:
s1, opening an upper inlet and a lower outlet of a resin adsorption bed layer after adsorption of sulfur-ammonia-containing sewage, injecting water from the upper inlet, and then collecting liquid flowing out from the lower outlet and filling the liquid into a container;
s2, stopping injecting water, injecting toluene from the upper inlet after no liquid flows out of the lower outlet, standing for soaking after the toluene is fully soaked in resin particles, continuously injecting toluene from the upper inlet, collecting liquid flowing out of the lower outlet until the liquid flowing out of the lower outlet is transparent, stopping injecting toluene, and filling the collected liquid into the container;
s3, injecting nitrogen from the upper inlet, collecting liquid flowing out from the lower outlet and filling the liquid into the container; stopping injecting nitrogen after no liquid flows out of the lower outlet, blowing superheated steam from the upper inlet, collecting the liquid flowing out of the lower outlet, cooling and then filling the liquid into the container;
s4, stopping injecting superheated steam, injecting water from the lower outlet, stopping injecting water when the inside of the shell of the resin adsorption bed layer is full of liquid, and standing until the resin particles are uniformly dispersed.
2. The method for regenerating a resin adsorption bed in a sulfur ammonia wastewater treatment process according to claim 1, wherein in S1, the internal pressure of the resin adsorption bed is controlled to be 0.1MPa.
3. The method for regenerating a resin adsorption bed in a sulfur-containing ammonia wastewater treatment process according to claim 1, wherein the water injected in S1 is demineralized water.
4. The method for regenerating a resin adsorption bed in a sulfur ammonia wastewater treatment process according to claim 1, wherein the internal pressure of the vertical adsorption bed is controlled to be 0.1mpa when toluene is injected in S2.
5. The method for regenerating a resin adsorption bed in a sulfur-containing ammonia wastewater treatment process according to claim 1, wherein in S2, toluene fully infiltrates resin particles and then stands for soaking for 60-70 min.
6. The method for regenerating a resin adsorption bed in a sulfur-containing ammonia wastewater treatment process according to claim 1, wherein in S2, the toluene flow rate when continuously injecting toluene is 0.2m 3 /h。
7. The method for regenerating a resin adsorption bed in a sulfur ammonia wastewater treatment process according to claim 1, wherein the duration of continuous injection of toluene is not less than 50min.
8. The method for regenerating a resin adsorption bed in a sulfur-containing ammonia wastewater treatment process according to claim 1, wherein the temperature of the superheated steam blown in S3 is 110 ℃ to 120 ℃.
9. The method for regenerating a resin adsorption bed in a sulfur ammonia-containing sewage treatment process according to claim 1, wherein the pressure of the superheated steam blown in S3 is 0.2 to 0.3MPa.
10. The method for regenerating a resin adsorption bed in a sulfur-containing ammonia wastewater treatment process according to claim 1, wherein the water injected in S4 is demineralized water.
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| CN115974321A (en) * | 2022-12-30 | 2023-04-18 | 陕西延长中煤榆林能源化工有限公司 | Sewage treatment system and method for heavy oil catalytic thermal cracking DCC device |
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| CN1562789A (en) * | 2004-03-25 | 2005-01-12 | 南京大学 | Reclaiming technique by using resin to adsorb nitro chlorobenzene in wastewater from producing nitro chlorobenzene |
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