CN114699890A - System and method for adsorbing and solidifying carbon dioxide by industrial sludge - Google Patents
System and method for adsorbing and solidifying carbon dioxide by industrial sludge Download PDFInfo
- Publication number
- CN114699890A CN114699890A CN202210232454.6A CN202210232454A CN114699890A CN 114699890 A CN114699890 A CN 114699890A CN 202210232454 A CN202210232454 A CN 202210232454A CN 114699890 A CN114699890 A CN 114699890A
- Authority
- CN
- China
- Prior art keywords
- sludge
- carbon dioxide
- industrial
- adsorbing
- waste gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 266
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 237
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 125
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 61
- 239000002912 waste gas Substances 0.000 claims abstract description 63
- 229910001868 water Inorganic materials 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 50
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 25
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 25
- 239000010842 industrial wastewater Substances 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 16
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 28
- 239000006228 supernatant Substances 0.000 claims description 23
- 239000002351 wastewater Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 16
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 12
- 239000000920 calcium hydroxide Substances 0.000 claims description 12
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 11
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 8
- 239000001095 magnesium carbonate Substances 0.000 claims description 8
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 8
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 230000035484 reaction time Effects 0.000 claims description 7
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 238000005261 decarburization Methods 0.000 claims description 5
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 5
- 239000000347 magnesium hydroxide Substances 0.000 claims description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 238000001471 micro-filtration Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 27
- 239000000126 substance Substances 0.000 abstract description 23
- 230000002829 reductive effect Effects 0.000 abstract description 18
- 239000002918 waste heat Substances 0.000 abstract description 8
- 239000000706 filtrate Substances 0.000 abstract description 2
- 230000007935 neutral effect Effects 0.000 abstract description 2
- 230000036632 reaction speed Effects 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 10
- 235000011941 Tilia x europaea Nutrition 0.000 description 10
- 239000004571 lime Substances 0.000 description 10
- 235000011116 calcium hydroxide Nutrition 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000004568 cement Substances 0.000 description 7
- 238000003889 chemical engineering Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000005262 decarbonization Methods 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- GIAFURWZWWWBQT-UHFFFAOYSA-N 2-(2-aminoethoxy)ethanol Chemical compound NCCOCCO GIAFURWZWWWBQT-UHFFFAOYSA-N 0.000 description 1
- LRDIEHDJWYRVPT-UHFFFAOYSA-N 4-amino-5-hydroxynaphthalene-1-sulfonic acid Chemical compound C1=CC(O)=C2C(N)=CC=C(S(O)(=O)=O)C2=C1 LRDIEHDJWYRVPT-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- VEFXTGTZJOWDOF-UHFFFAOYSA-N benzene;hydrate Chemical compound O.C1=CC=CC=C1 VEFXTGTZJOWDOF-UHFFFAOYSA-N 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010344 co-firing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- -1 sodium alkyl benzene Chemical class 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/07—Preparation from the hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a system and a method for adsorbing and solidifying carbon dioxide by industrial sludge, which are used for adsorbing and solidifying carbon dioxide in waste gas of coal chemical enterprises by alkaline water-containing sludge generated in the industrial wastewater treatment process, and solidifying the carbon dioxide in situ by the water-containing sludge generated by a wastewater treatment unit without pretreating the sludge, so that the pH value of the solidified alkaline sludge is adjusted to be neutral, and the risk of salinization of surrounding soil in the sludge landfill treatment process is greatly reduced; the carbon dioxide gas discharged by coal chemical enterprises has a certain temperature, so that the reaction speed of alkaline substances in the sludge and the carbon dioxide can be accelerated, and simultaneously, the water in the sludge can be evaporated through waste heat, so that the water content of the sludge to be delivered is reduced; in the reaction process of adsorbing and solidifying carbon dioxide by sludge, the carbon dioxide reacts with sodium hydroxide to generate sodium carbonate, and unreacted sodium carbonate flows back to the front-end process through sludge press filtrate, so that the addition amount of the sodium carbonate in the water treatment process can be reduced, and the resource utilization of part of the carbon dioxide is realized.
Description
Technical Field
The invention relates to the field of resource utilization of industrial solid wastes, in particular to a system and a method for adsorbing and solidifying carbon dioxide by using industrial sludge.
Background
The waste gas generated in the coal chemical engineering project mainly comes from coal storage and transportation working section, dust removal tail gas of a coal powder preparation and conveying system, continuous vent gas and accident vent gas of a gasification working section, acid gas and accident vent gas of a stripping tower of a conversion working section, tail gas discharged from a washing tower of a desulfurization and decarburization working section and H-containing gas2S acid gas, waste gas of a propylene compression section, waste gas discharged by a sulfur recovery device, accident vent gas of a methanation section and the like, and the components of the S acid gas, the waste gas of the propylene compression section, the waste gas discharged by a sulfur recovery device, the accident vent gas of the methanation section and the like are mainly H2，CO，N2，CO2，H2S，COS，H2O，CH4HCl, a complex composition and is not technically useful. In order to ensure the normal operation and safety of chemical production equipment, it generally sets up the corresponding flare gas discharge pipe network and flare, etc. the materials from every discharge system are firstly introduced into flare gas separation tank, gas-liquid separation is implemented, the liquid is returned to recovery device, the gas is introduced into flare gas sealed tank, the gas coming out from sealed tank is introduced into flare chimney, the gas component after combustion is mainly CO2And H2O, and the like. Large amount of CO2Causes greenhouse effect, and with the introduction of the national policy "30/60", CO2If the CO is discharged, the discharge index is gradually reduced2Improper waste gas treatment can affect the normal production and project benefits of related coal chemical projects.
Meanwhile, the coal chemical engineering project is also a water-consuming household, taking 100 ten thousand tons of coal for preparing methanol as an example, the water consumption reaches 1500 ten thousand meters per year3And a large amount of industrial wastewater is generated while fresh water is consumed. The basic process of the existing industrial wastewater treatment project comprises the following steps: one-stage reverse osmosis desalination, two-stage reverse osmosis desalination, evaporation crystallization and salt separation, because the calcium and magnesium ions in the wastewater have high hardness and silicon content, a high-density pool and a resin exchange device are added before the reverse osmosis and evaporation crystallization process stages to remove the hardness and the silicon content, and the hardness is removed according to different water qualitiesThe sodium carbonate, sodium hydroxide, calcium oxide, magnesium agent, sodium metaaluminate and other agents are added into the mixture. A large amount of sludge is generated, calculated by annual treated water amount of 800 ten thousand tons of industrial wastewater, the amount of the generated sludge can reach about 4 ten thousand tons, and excessive alkaline agents are added, so that calcium and magnesium ions and alkalinity in the sludge are overhigh.
The invention patent CN103739184B discloses a method for drying domestic sludge by using dry-process cement kiln waste heat and directly co-firing treatment, municipal sludge, sodium hydroxide, glycerol, diglycolamine, sodium alkyl benzene sulfonate and water are mixed into an additive, and then coal powder and hydrated lime are added in a metered manner. The dried sludge mixture is directly injected into an ascending flue between the kiln tail of the dry cement kiln and the decomposing furnace at intervals by high-pressure air of an air pump and is mixed and burnt with cement raw materials in the kiln. However, the method is to dry the sludge in a drying rotary kiln by using waste heat, then quantitatively mix the dried sludge into cement raw materials to burn the cement raw materials into cement, so that the method not only needs to be combined with a cement plant to treat the sludge and has the problem of large-scale sludge transportation radius cost, but also needs to add various chemical reagents, and has high industrialization cost. The invention patent CN110694458A discloses a method for absorbing carbon dioxide in lime kiln flue gas by using municipal sludge, quicklime powder calcined by a lime kiln is mixed with sludge for reaction to reduce water, stabilize and sterilize, a formed mixture pile body is used for absorbing carbon dioxide generated in the lime calcination process to make the carbon dioxide calcified to realize carbon dioxide emission reduction, and simultaneously flue gas waste heat is used for further drying the mixture to form a virtuous circle of the production process in a ring-by-ring manner. However, the method decomposes calcium carbonate to prepare lime and carbon dioxide, does not achieve the net utilization of carbon dioxide, needs to be combined with a lime production plant, consumes coal to heat and decompose calcium carbonate to prepare lime, and has the phenomenon of resource waste.
Disclosure of Invention
Aiming at the existing discharged CO during the industrial waste gas treatment in the prior art2The invention provides a system and a method for adsorbing and solidifying carbon dioxide by industrial sludge, which are used for oxidizing carbon dioxide discharged by a torch of a coal chemical industry enterpriseThe carbon waste gas is introduced into a sludge treatment system generated by industrial waste water, excessive alkaline substances such as calcium hydroxide and sodium hydroxide in the sludge of the industrial waste water hardness removal unit are used for adsorbing and solidifying carbon dioxide, the alkalinity of the sludge is changed into neutrality, the sludge is further heated, dried and reduced by using the waste heat in the waste gas, and sodium carbonate is generated by reacting with the sodium hydroxide, so that the carbon waste gas has the functions of carbon dioxide emission reduction and sludge resource utilization, and has important ecological and economic significance.
The invention is realized by the following technical scheme:
an industrial sludge adsorption and solidification carbon dioxide system comprises a torch tower, a sludge concentration tank, a pipeline mixer, a reactor, a filter press, a wastewater tank and an industrial wastewater hardness removal unit; the output end of the flare tower is connected with the gas input end of the pipeline mixer, the output end of the pipeline mixer is connected with the input end of the reactor, the output end of the reactor is connected with the input end of the filter press, one end of the output end of the filter press is connected with the wastewater pool, and the other end of the output end of the filter press is transported outside; the output end of the industrial wastewater hardness removal unit is connected with the input end of the sludge concentration tank, and the output end of the sludge concentration tank is connected with the sludge input end of the pipeline mixer.
A method for adsorbing and solidifying carbon dioxide by industrial sludge is based on the system for adsorbing and solidifying carbon dioxide by industrial sludge, and comprises the following steps:
step 1, conveying sludge generated by an industrial wastewater hardness removal unit into a sludge concentration tank for sludge concentration treatment, separating sludge and supernatant in the sludge concentration tank, wherein the supernatant flows back into the wastewater tank, and the sludge is conveyed into a pipeline mixer;
step 2, conveying the discharged waste gas to a pipeline mixer filled with sludge by the flare tower, mixing the waste gas and the sludge by the pipeline mixer to enable the waste gas to be in contact with the sludge, and conveying the waste gas and the sludge into a reactor to perform contact reaction to obtain a carbon dioxide sludge gas-liquid mixture;
and 3, conveying the gas-liquid mixture of the carbon dioxide sludge into a filter press for filter pressing treatment to obtain solidified sludge, separating sludge from supernatant in the solidified sludge, refluxing the supernatant into a wastewater tank, drying the sludge and carrying out outward treatment.
Preferably, in the step 1, the sludge is subjected to high-density pond or tubular microfiltration to remove alkaline sludge generated by the hard silicon removal unit, the pH of the sludge is 10-12, and the water content of the sludge is 80-97%.
Preferably, in the step 1, the sludge concentration tank conveys the sludge to the pipeline mixer through a sludge conveying pump, wherein the sludge conveying amount is 10-50 m3The delivery pressure is 0.1-1 Mpa.
Preferably, in the step 2, the concentration of carbon dioxide in the waste gas discharged from the flare tower is 80-100%, the temperature of the waste gas is 15-80 ℃, and the conveying flow rate of the waste gas is 1-100 Nm3The conveying pressure of the waste gas is 0.05-0.5 Mpa; the carbon dioxide decarburization rate in the waste gas is 10-90%.
Preferably, in the step 2, the flow velocity of the pipeline mixer is 0.9-1.2 m/s.
Preferably, in step 2, the reaction principle of the waste gas and the sludge in the reactor is as follows:
excessive sodium hydroxide added in the wastewater treatment process directly reacts with carbon dioxide to generate sodium carbonate, the sodium carbonate reacts with calcium sulfate in sludge water to generate calcium carbonate and sodium sulfate, the added excessive calcium hydroxide reacts with the carbon dioxide to generate calcium carbonate and water, magnesium oxide reacts with the carbon dioxide to generate magnesium carbonate, the magnesium carbonate reacts with the calcium hydroxide to generate calcium carbonate and magnesium hydroxide precipitates, and sodium carbonate which is not dissolved in the water in an unreacted manner returns to a wastewater tank through supernatant for reducing the content of a sodium carbonate medicament.
Further, in the step 2, the reaction temperature of the mixture of the carbon dioxide and the sludge is 15-35 ℃, and the reaction time is 0.5-5 h.
Preferably, in the step 3, the working pressure of the filter press is 1-10 Mpa, and the working time period is 1-3 h.
Preferably, in the step 3, the water content of the generated solidified sludge is 50-80%, and the pH value is 6.5-8.5.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides an industrial sludge carbon dioxide adsorption and solidification system, which is used for adsorbing and solidifying carbon dioxide in waste gas of coal chemical industry enterprises by alkaline water-containing sludge generated in the industrial wastewater treatment process, adopting the water-containing sludge generated by a wastewater treatment unit to solidify the carbon dioxide on site, and not needing to pre-treat the sludge, so that the pH value of the alkaline sludge after solidification is adjusted to be neutral, the risk of salinization of surrounding soil in the sludge landfill treatment process is greatly reduced, and the discharge amount of the carbon dioxide of the coal chemical industry enterprises is reduced.
The invention provides a system and a method for adsorbing and solidifying carbon dioxide by using industrial sludge, which are used for adsorbing and solidifying carbon dioxide waste gas generated by coal chemical engineering projects by using sludge solid waste generated in the industrial wastewater treatment process, realizing the emission reduction of carbon dioxide of coal chemical enterprises, changing the chemical property of sludge by solidifying carbon dioxide, laying a foundation for subsequent sludge treatment, recycling carbon dioxide into sodium carbonate, reducing the addition amount of a medicament in the wastewater treatment process, and having important economic and ecological significance. After the treatment by the method, the alkaline characteristics of the sludge generated by industrial wastewater treatment are fully utilized, and the carbon dioxide is adsorbed and solidified, so that the chemical characteristics of the sludge are changed, carbon emission reduction is realized, meanwhile, part of the carbon dioxide is converted into sodium carbonate, the recycling of part of the carbon dioxide is realized, the wastewater treatment cost and the risk of sludge treatment on the environment are reduced, the carbon dioxide emission of industrial projects is reduced, and a new thought and way are provided for carbon emission reduction and sludge treatment. The carbon dioxide gas discharged by coal chemical enterprises has a certain temperature, so that the reaction speed of alkaline substances in the sludge and the carbon dioxide can be accelerated, and simultaneously, the water in the sludge can be evaporated through waste heat, so that the water content of the sludge to be delivered is reduced; in the reaction process of adsorbing and solidifying carbon dioxide by sludge, the carbon dioxide reacts with sodium hydroxide to generate sodium carbonate, and unreacted sodium carbonate flows back to the front-end process through sludge press filtrate, so that the addition amount of the sodium carbonate in the water treatment process can be reduced, and the resource utilization of part of the carbon dioxide is realized.
Drawings
FIG. 1 is a structural diagram of a system for adsorbing and solidifying carbon dioxide by using industrial sludge.
In the figure: 1-a flare stack; 2-sludge concentration tank; 3-a line mixer; 4-a reactor; 5, a filter press; 6-conveying belt; 7-a wastewater tank; 8-industrial wastewater hardness removal unit.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the invention provides an industrial sludge adsorption and solidification carbon dioxide system, which comprises a torch tower 1, a sludge concentration tank 2, a pipeline mixer 3, a reactor 4, a filter press 5, a wastewater tank 7 and an industrial wastewater hardness removal unit 8; the output end of the flare tower 1 is connected with the gas input end of a pipeline mixer 3, the output end of the pipeline mixer 3 is connected with the input end of a reactor 4, the output end of the reactor 4 is connected with the input end of a filter press 5, one end of the output end of the filter press 5 is connected with a wastewater pool 7, and the other end of the output end is transported outside; the output end of the industrial wastewater hardness removal unit 8 is connected with the input end of the sludge concentration tank 2, and the output end of the sludge concentration tank 2 is connected with the sludge input end of the pipeline mixer 3.
The invention also provides a method for adsorbing and solidifying carbon dioxide by using industrial sludge, which is characterized in that carbon dioxide waste gas discharged by a flare of a coal chemical industry enterprise is introduced into a sludge treatment system generated by industrial waste water, excessive calcium hydroxide and sodium hydroxide contained in sludge are used for adsorbing and solidifying carbon dioxide, simultaneously, the alkalinity of the sludge is changed into neutrality, the sludge can be heated, dried and reduced by using waste heat in the waste gas, sodium carbonate is generated by reacting with the sodium hydroxide, the resource utilization of partial carbon dioxide is realized, and the method has important ecological and economic significance.
Specifically, the method for adsorbing and solidifying carbon dioxide by using industrial sludge comprises the following steps:
step 1, conveying sludge generated by an industrial wastewater hardness removal unit 8 into a sludge concentration tank 2 for sludge concentration treatment, separating sludge and supernatant in the sludge concentration tank 2, wherein the supernatant flows back into a wastewater tank 7, and the sludge is conveyed into a pipeline mixer 3;
step 2, conveying the discharged waste gas to a pipeline mixer 3 filled with sludge through a fan by a torch tower 1, mixing the waste gas and the sludge through the pipeline mixer 3 to ensure that the waste gas is fully contacted with the sludge, and conveying the waste gas and the sludge to a reactor 4 for contact reaction to obtain a carbon dioxide sludge gas-liquid mixture;
and 3, conveying the gas-liquid mixture of the carbon dioxide sludge into a filter press 5 for filter pressing treatment to obtain solidified sludge, separating sludge from supernatant in the solidified sludge, refluxing the supernatant into a wastewater tank 7, drying the sludge and carrying out outward treatment.
The invention adopts wet sludge to absorb CO2The sludge contains moisture and CO2。
Specifically, in the step 1, the sludge is subjected to high-density pond or tubular microfiltration to remove alkaline sludge generated by a hard silicon removal unit, the pH of the sludge is 10-12, and the water content of the sludge is 80-97%.
Specifically, in the step 1, the main components of the sludge are calcium carbonate and magnesium hydroxide; the water content of the sludge contains sodium hydroxide, calcium hydroxide, magnesium oxide and magnesium chloride.
Specifically, in the step 1, the sludge concentration tank 2 conveys sludge to the pipeline mixer 3 through a sludge conveying pump, wherein the sludge conveying pump is a universal sludge screw pump, and the sludge conveying amount is 10-50 m3The delivery pressure is 0.1-1 MPa.
Specifically, the concentration of carbon dioxide in the waste gas discharged from the flare tower 1 is 80-100%, the temperature of the waste gas is 15-80 ℃, and the conveying flow rate of the waste gas is 1-100 Nm3The exhaust gas conveying pressure is 0.05-0.5 MPa.
Specifically, the pipeline mixer is a universal static baffle type, a perforated plate type, a three-way type mixer and the like, and the flow velocity of the pipeline mixer is 0.9-1.2 m/s;
specifically, the reaction time of the mixture of carbon dioxide and sludge in the reactor is 0.5-5 h, and the temperature of the mixture of carbon dioxide and sludge is 15-35 ℃;
the method for adsorbing and solidifying carbon dioxide by utilizing sludge relates to the following chemical reaction principle:
excessive sodium hydroxide added in the wastewater treatment process directly reacts with carbon dioxide to generate sodium carbonate, the sodium carbonate further reacts with calcium sulfate in sludge water to generate calcium carbonate and sodium sulfate, the added excessive calcium hydroxide reacts with the carbon dioxide to generate calcium carbonate and water, magnesium oxide reacts with the carbon dioxide to generate magnesium carbonate, and the magnesium carbonate further reacts with the calcium hydroxide to generate calcium carbonate and magnesium hydroxide precipitates. Sodium carbonate which is not dissolved in water by reaction returns to the front-end water treatment process through supernatant, the content of sodium carbonate medicament can be reduced, and the chemical equation is as follows:
MgO+CO2＝MgCO3
MgCO3+Ca(OH)2→Mg(OH)2↓+CaCO3↓
Ca(OH)2+CO2＝CaCO3↓+H2O
2NaOH+CO2＝Na2CO3+H2O
CaSO4+Na2CO3→CaCO3↓+Na2SO4
specifically, in the step 3, the working pressure of the filter press 5 is 1-10 Mpa, and the working time period is 1-3 hours.
Specifically, in the step 3, the water content of the generated solidified sludge is 50-80%, and the pH value is 6.5-8.5.
Specifically, in step 3, the sludge is dried and transported out through a conveyer belt 6.
Example 1
A method for adsorbing and solidifying carbon dioxide by industrial sludge comprises the following steps:
step 1, selecting sludge in a high-density tank of an Ordos coal chemical wastewater treatment project, removing hardness and silicon in water in the high-density tank by adopting lime hardness removal and magnesium agent silicon removal methods, sending the sludge generated in the high-density tank into a sludge concentration tank, wherein the water content of the sludge is 80 percent, the pH value is 10.5, and sending supernatant generated in the sludge tank back to a water inlet of a hardness removal unit; and the sludge generated by the sludge concentration 2 is conveyed into a pipeline mixer 3 through a sludge screw rod, and the conveying amount is 10m3H, the conveying pressure is 0.1 Mpa;
step 2, conveying the waste gas from the discharge port of the coal chemical engineering project torch into a pipeline mixer 3 filled with sludge through a fan, conveying the waste gas with the content of 80% and the temperature of 25 ℃ into the pipeline mixer connected with sludge conveying through the fan, wherein the flow velocity of the pipeline mixer is 0.9m/s, and the conveying flow of carbon dioxide is 10Nm3The conveying pressure is 0.06Mpa, and the sludge and the carbon dioxide in the waste gas are fully stirred by a pipeline mixer to contact and react; conveying the waste gas and the sludge into a reactor 4 for contact reaction to obtain a carbon dioxide sludge gas-liquid mixture, wherein the reaction time is 4.5 hours, and the temperature of the carbon dioxide and sludge mixture is 20 ℃;
and 3, sending the carbon dioxide sludge gas-liquid mixture into a filter press for further reaction, and then carrying out filter pressing treatment, wherein the working pressure of the filter press is 2Mpa, the working time period is 1h, and the water content of the generated solidified sludge is 50%. The supernatant fluid of the filter pressing returns to a wastewater tank at the water inlet of the hardness removing unit, and the generated sludge is sent out for treatment.
The test result shows that the content of carbon dioxide in the waste gas is from 1.6kg/Nm3After the sludge is adsorbed, the concentration is reduced to 0.2kg/Nm3The decarburization rate reaches 87.5 percent, the water content of the produced sludge is 50 percent, and the pH value of the sludge is 8.5.
Example 2
A method for adsorbing and solidifying carbon dioxide by industrial sludge comprises the following steps:
step 1, selecting sludge in a high-density tank of an Ordos coal chemical wastewater treatment project, removing hardness and silicon in water in the high-density tank by adopting a lime hardness removal and magnesium agent desilication method, sending the sludge generated in the high-density tank into a sludge concentration tank, wherein the water content of the sludge is 97 percent, the pH value is 11.6, and sending supernatant generated in the sludge tank back to a water inlet of a hardness removal unit; and the sludge generated by the sludge concentration 2 is conveyed into the pipeline mixer 3 by a sludge screw rod, and the conveying amount is 50m3H, the conveying pressure is 1 Mpa;
step 2, connecting the waste gas of the flare discharge port of the coal chemical engineering project into a fan through a pipeline, sending the waste gas with the content of 98 percent and the temperature of 80 ℃ to a pipeline mixer connected with sludge delivery through the fan, wherein the flow velocity of the pipeline mixer is 1.2m/s, and the delivery flow of carbon dioxide is 100Nm3The conveying pressure is 0.5Mpa, and the sludge and the carbon dioxide in the waste gas are fully stirred by a pipeline mixer to contact and react; conveying the waste gas and the sludge into a reactor 4 for contact reaction to obtain a carbon dioxide sludge gas-liquid mixture, wherein the reaction time is 2.5 hours, and the temperature of the carbon dioxide and sludge mixture is 35 ℃;
and 3, sending the carbon dioxide sludge gas-liquid mixture into a filter press for further reaction, and then carrying out filter pressing treatment, wherein the working pressure of the filter press is 10Mpa, the working time period is 3 hours, and the water content of the generated solidified sludge is 80%. The supernatant fluid of the filter pressing returns to a wastewater tank at the water inlet of the hardness removing unit, and the generated sludge is sent out for treatment.
TestingThe results show that the carbon dioxide content in the exhaust gas is from 1.9kg/Nm3After the sludge is adsorbed, the concentration is reduced to 0.3kg/Nm3The decarbonization rate reaches 84.2 percent, the water content of the produced sludge is 80 percent, and the pH value of the sludge is 6.5.
Example 3
A method for adsorbing and solidifying carbon dioxide by industrial sludge comprises the following steps:
step 1, selecting sludge in a high-density tank of an Ordos coal chemical wastewater treatment project, removing hardness and silicon in water in the high-density tank by adopting lime hardness removal and magnesium agent silicon removal methods, sending the sludge generated in the high-density tank into a sludge concentration tank, wherein the water content of the sludge is 95 percent, the pH value is 11.3, and sending supernatant generated in the sludge tank back to a water inlet of a hardness removal unit; and the sludge generated by the sludge concentration 2 is conveyed into a pipeline mixer 3 through a sludge screw rod, and the conveying amount is 30m3H, the conveying pressure is 0.6 Mpa;
step 2, connecting the waste gas of the flare discharge port of the coal chemical engineering project into a fan through a pipeline, sending the waste gas with the content of 95 percent and the temperature of 60 ℃ to a pipeline mixer connected with sludge delivery through the fan, wherein the flow rate of the pipeline mixer is 1.0m/s, and the delivery flow of carbon dioxide is 80Nm3The conveying pressure is 0.3Mpa, and the sludge and the carbon dioxide in the waste gas are fully stirred by a pipeline mixer to contact and react; conveying the waste gas and the sludge into a reactor 4 for contact reaction to obtain a carbon dioxide sludge gas-liquid mixture, wherein the reaction time is 1.5h, and the temperature of the carbon dioxide and sludge mixture is 30 ℃;
and 3, sending the carbon dioxide sludge gas-liquid mixture into a filter press for further reaction, and then carrying out filter pressing treatment, wherein the working pressure of the filter press is 5Mpa, the working time period is 2.5 hours, and the water content of the generated solidified sludge is 60%. The supernatant fluid of the filter pressing returns to a wastewater tank at the water inlet of the hardness removing unit, and the generated sludge is sent out for treatment.
The test result shows that the content of carbon dioxide in the waste gas is from 1.8kg/Nm3After the sludge is adsorbed, the concentration is reduced to 0.3kg/Nm3The decarburization rate reaches 83.3 percent, the water content of the produced sludge is 60 percent, and the pH value of the sludge is 7.3.
Example 4
A method for adsorbing and solidifying carbon dioxide by industrial sludge comprises the following steps:
step 1, selecting sludge in a high-density tank of an Ordos coal chemical wastewater treatment project, removing hardness and silicon in water in the high-density tank by adopting lime hardness removal and magnesium agent silicon removal methods, sending the sludge generated in the high-density tank into a sludge concentration tank, wherein the water content of the sludge is 93 percent, the pH value is 10.7, and sending supernatant generated in the sludge tank back to a water inlet of a hardness removal unit; and the sludge generated by the sludge concentration 2 is conveyed into a pipeline mixer 3 through a sludge screw, and the conveying amount is 25m3H, the conveying pressure is 0.4 Mpa;
step 2, connecting the waste gas of the coal chemical engineering project torch discharge port into a fan through a pipeline, sending the waste gas with the content of 96 percent and the temperature of 50 ℃ to a pipeline mixer connected with sludge delivery through the fan, wherein the flow velocity of the pipeline mixer is 0.9m/s, and the delivery flow of carbon dioxide is 70Nm3The conveying pressure is 0.4Mpa, and the sludge and the carbon dioxide in the waste gas are fully stirred by a pipeline mixer to contact and react; conveying the waste gas and the sludge into a reactor 4 for contact reaction to obtain a carbon dioxide sludge gas-liquid mixture, wherein the reaction time is 0.5h, and the temperature of the carbon dioxide and sludge mixture is 28 ℃;
and 3, sending the carbon dioxide sludge gas-liquid mixture into a filter press for further reaction, and then carrying out filter pressing treatment, wherein the working pressure of the filter press is 6Mpa, the working time period is 2 hours, and the water content of the generated solidified sludge is 75%. The supernatant fluid of the filter pressing returns to a wastewater tank at the water inlet of the hardness removing unit, and the generated sludge is sent out for treatment.
The test result shows that the content of carbon dioxide in the waste gas is from 1.82kg/Nm3After the sludge is adsorbed, the concentration is reduced to 0.4kg/Nm3The decarbonization rate reaches 78.0 percent, the water content of the produced sludge is 75 percent, and the pH value of the sludge is 7.6.
Therefore, the method has simple process flow, can use excessive alkaline substances in the industrial wastewater and sludge treatment process to absorb carbon dioxide, realizes carbon emission reduction, changes the chemical property and the water content of the sludge, realizes carbon resource utilization, reduces sludge treatment risk, saves a large amount of energy consumption, and reduces cost.
The method of the invention utilizes alkaline sludge to absorb and solidify the carbon dioxide waste gas. After the treatment by the method, the sludge is modified, the carbon dioxide waste gas is adsorbed and solidified and the resource is utilized, the waste heat of the waste gas is fully utilized to reduce the sludge, the carbon emission of coal chemical enterprises is reduced, the sludge treatment risk is reduced, the existing industrial wastewater sludge treatment system and the waste gas treatment of the coal chemical enterprises are organically combined, and the method has important economic and ecological significance.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. The system for adsorbing and solidifying carbon dioxide by industrial sludge is characterized by comprising a torch tower (1), a sludge concentration tank (2), a pipeline mixer (3), a reactor (4), a filter press (5), a wastewater tank (7) and an industrial wastewater hardness removal unit (8); the output end of the flare tower (1) is connected with the gas input end of the pipeline mixer (3), the output end of the pipeline mixer (3) is connected with the input end of the reactor (4), the output end of the reactor (4) is connected with the input end of the filter press (5), one end of the output end of the filter press (5) is connected with the wastewater pool (7), and the other end of the output end of the filter press (5) is transported outside; the output end of the industrial wastewater hardness removal unit (8) is connected with the input end of the sludge concentration tank (2), and the output end of the sludge concentration tank (2) is connected with the sludge input end of the pipeline mixer (3).
2. The industrial sludge carbon dioxide adsorption and solidification method is based on the industrial sludge carbon dioxide adsorption and solidification system of claim 1, and is characterized by comprising the following steps:
step 1, conveying sludge generated by an industrial wastewater hardness removal unit (8) into a sludge concentration tank (2) for sludge concentration treatment, separating sludge and supernatant in the sludge concentration tank (2), wherein the supernatant flows back into a wastewater tank (7), and the sludge is conveyed into a pipeline mixer (3);
step 2, conveying the discharged waste gas to a pipeline mixer (3) filled with sludge by the torch tower (1), mixing the waste gas and the sludge by the pipeline mixer (3), and conveying the waste gas and the sludge into a reactor (4) for contact reaction to obtain a carbon dioxide sludge gas-liquid mixture;
and 3, conveying the gas-liquid mixture of the carbon dioxide sludge into a filter press (5) for filter pressing treatment to obtain solidified sludge, separating sludge from supernatant in the solidified sludge, refluxing the supernatant into a wastewater pool (7), drying the sludge and carrying out external treatment.
3. The method for adsorbing and solidifying carbon dioxide by using industrial sludge according to claim 1, wherein in the step 1, the sludge is alkaline sludge generated by a high-density pond or a tubular microfiltration hard silicon removal unit, the pH of the sludge is 10-12, and the water content of the sludge is 80-97%.
4. The method for adsorbing and solidifying carbon dioxide by industrial sludge according to claim 1, wherein in the step 1, the sludge concentration tank (2) conveys the sludge to the pipeline mixer (3) through a sludge conveying pump, wherein the conveyed sludge amount is 10-50 m3The delivery pressure is 0.1-1 MPa.
5. The method for adsorbing and solidifying carbon dioxide by industrial sludge according to claim 1, wherein in the step 2, the concentration of carbon dioxide in the waste gas discharged from the flare tower (1) is 80-100%, the temperature of the waste gas is 15-80 ℃, and the conveying flow rate of the waste gas is 1-100 Nm3The conveying pressure of the waste gas is 0.05-0.5 Mpa; the carbon dioxide decarburization rate in the waste gas is 10-90%.
6. The method for adsorbing and solidifying carbon dioxide by industrial sludge according to claim 1, wherein in the step 2, the flow velocity of the pipeline mixer (3) is 0.9-1.2 m/s.
7. The method for adsorbing and solidifying carbon dioxide by industrial sludge as claimed in claim 1, wherein the reaction principle of the waste gas and the sludge in the reactor (4) in the step 2 is as follows:
excessive sodium hydroxide added in the wastewater treatment process directly reacts with carbon dioxide to generate sodium carbonate, the sodium carbonate reacts with calcium sulfate in sludge water to generate calcium carbonate and sodium sulfate, the added excessive calcium hydroxide reacts with the carbon dioxide to generate calcium carbonate and water, magnesium oxide reacts with the carbon dioxide to generate magnesium carbonate, the magnesium carbonate reacts with the calcium hydroxide to generate calcium carbonate and magnesium hydroxide precipitates, and sodium carbonate which is not dissolved in the water in an unreacted manner returns to a wastewater tank 5 through supernatant for reducing the content of a sodium carbonate medicament.
8. The method for adsorbing and solidifying carbon dioxide by industrial sludge according to claim 7, wherein in the step 2, the reaction temperature of the mixture of carbon dioxide and sludge is 15-35 ℃ and the reaction time is 0.5-5 h.
9. The method for adsorbing and solidifying carbon dioxide by using industrial sludge as claimed in claim 1, wherein in the step 3, the pressure filter (5) is operated under 1-10 Mpa for 1-3 hours.
10. The method for adsorbing and solidifying carbon dioxide by industrial sludge according to claim 1, wherein in the step 3, the water content of the produced solidified sludge is 50-80%, and the pH value is 6.5-8.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210232454.6A CN114699890B (en) | 2022-03-09 | 2022-03-09 | System and method for adsorbing and solidifying carbon dioxide by industrial sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210232454.6A CN114699890B (en) | 2022-03-09 | 2022-03-09 | System and method for adsorbing and solidifying carbon dioxide by industrial sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114699890A true CN114699890A (en) | 2022-07-05 |
| CN114699890B CN114699890B (en) | 2024-01-23 |
Family
ID=82169142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210232454.6A Active CN114699890B (en) | 2022-03-09 | 2022-03-09 | System and method for adsorbing and solidifying carbon dioxide by industrial sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114699890B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3947350A (en) * | 1972-10-30 | 1976-03-30 | Envirotech Corporation | Process of preparing sewage sludge for dewatering |
| US5455013A (en) * | 1993-02-04 | 1995-10-03 | Kyouei Bussan K.K. | Carbon dioxide absorber and its manufacturing method using sludge, and method for absorbing carbon dioxide in exhaust gas |
| JP2004352587A (en) * | 2003-05-30 | 2004-12-16 | Toshiba Corp | System and method for recovering carbon dioxide in exhaust gas |
| JP2007061710A (en) * | 2005-08-30 | 2007-03-15 | Kobelco Eco-Solutions Co Ltd | Organic sludge treatment method and apparatus |
| CN203370458U (en) * | 2013-06-19 | 2014-01-01 | 清勤水处理科技（上海）有限公司 | Waste gas washing tower |
| KR20180031973A (en) * | 2016-09-21 | 2018-03-29 | 재단법인 포항산업과학연구원 | Method for preparation of carbonate by using sludge, and sludge including carbonate |
| CN110354671A (en) * | 2019-07-30 | 2019-10-22 | 天津理工大学 | A kind of method of red mud and the processing of lime kiln exhaust gas common resourceization |
| CN110694458A (en) * | 2019-09-18 | 2020-01-17 | 武汉理工大学 | Method for absorbing carbon dioxide in lime kiln flue gas by using municipal sludge |
| CN113277645A (en) * | 2021-06-04 | 2021-08-20 | 陕西大河净化科技有限公司 | Process for reducing hardness of wastewater by using waste gas containing carbon dioxide |
-
2022
- 2022-03-09 CN CN202210232454.6A patent/CN114699890B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3947350A (en) * | 1972-10-30 | 1976-03-30 | Envirotech Corporation | Process of preparing sewage sludge for dewatering |
| US5455013A (en) * | 1993-02-04 | 1995-10-03 | Kyouei Bussan K.K. | Carbon dioxide absorber and its manufacturing method using sludge, and method for absorbing carbon dioxide in exhaust gas |
| JP2004352587A (en) * | 2003-05-30 | 2004-12-16 | Toshiba Corp | System and method for recovering carbon dioxide in exhaust gas |
| JP2007061710A (en) * | 2005-08-30 | 2007-03-15 | Kobelco Eco-Solutions Co Ltd | Organic sludge treatment method and apparatus |
| CN203370458U (en) * | 2013-06-19 | 2014-01-01 | 清勤水处理科技（上海）有限公司 | Waste gas washing tower |
| KR20180031973A (en) * | 2016-09-21 | 2018-03-29 | 재단법인 포항산업과학연구원 | Method for preparation of carbonate by using sludge, and sludge including carbonate |
| CN110354671A (en) * | 2019-07-30 | 2019-10-22 | 天津理工大学 | A kind of method of red mud and the processing of lime kiln exhaust gas common resourceization |
| CN110694458A (en) * | 2019-09-18 | 2020-01-17 | 武汉理工大学 | Method for absorbing carbon dioxide in lime kiln flue gas by using municipal sludge |
| CN113277645A (en) * | 2021-06-04 | 2021-08-20 | 陕西大河净化科技有限公司 | Process for reducing hardness of wastewater by using waste gas containing carbon dioxide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114699890B (en) | 2024-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2952395C (en) | Process and device for desulfurization-denitration of flue gas | |
| AU2009287464B2 (en) | Processing CO2 utilizing a recirculating solution | |
| AU2016266463B2 (en) | Method for comprehensive recovery of smelting wastewater containing magnesium | |
| US20120211421A1 (en) | Systems and methods for processing co2 | |
| WO2010132863A1 (en) | Systems and methods for processing co2 | |
| CN103894047A (en) | Flue gas pollutant control integrated purifying and recycling process | |
| CN1883765A (en) | Circulation desulfurization technology by ammonia-soda process | |
| CN113149055A (en) | Method for preparing calcium carbonate and sulfate by using industrial desulfurized gypsum | |
| CN101347706A (en) | Flue gas desulfurization technique using dual alkali method with acetylene sludge as recycling agent | |
| TWI795750B (en) | Apparatus and method for combustion exhaust gas purification | |
| CN108191056B (en) | Desulfurization and denitrification method for desulfurization and denitrification wastewater and ammonia nitrogen wastewater | |
| CN113769564B (en) | Semi-dry desulfurization ash solidified industrial flue gas carbon dioxide and recycling method thereof | |
| CN102008880A (en) | Method for realizing integrated desulfurization and denitrification and product recovery based on magnesium-ammonium method | |
| CN101972595A (en) | Method for implementing magnesium-ammonia combined flue gas desulfuration and decarbonization and by-product recovery | |
| CN101816889A (en) | Desulphurization process by combining printing and dyeing wastewater | |
| CN102921292B (en) | Method used to improve carbon dioxide trapping performance of papermaking white mud in fire coal fluidized bed boiler system | |
| CN206762618U (en) | A kind of dry-wet integratedization desulfuring and denitrifying apparatus | |
| CN102671523B (en) | Method for fixing light calcium carbonate as CO2 byproduct by using humate and desulfurization gypsum | |
| CN101823745A (en) | Method for producing super-fine light-weighted calcium carbonate, ammonium chloride and carbon powder with waste associated alkali solution and acetylene sludge | |
| CN115417409B (en) | Method for reinforcing red mud carbon fixation through cooperation of solid wastes in multi-production industry | |
| CN108211761B (en) | Method for cooperatively treating pollutants in coking desulfurization waste liquid, calcium-based solid waste and industrial flue gas | |
| CN114452790B (en) | Method for absorbing and mineralizing and utilizing carbon dioxide in waste gas | |
| CN114699890B (en) | System and method for adsorbing and solidifying carbon dioxide by industrial sludge | |
| CN101823744B (en) | Method for producing light-weighted calcium carbonate, ammonium chloride and carbon powder with waste associated alkali solution and acetylene sludge | |
| CN106731639A (en) | A kind of new sea water desulfuration Carbon fixation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |