CN109158044B - Electrochemical pretreatment system and pretreatment process for enhancing biochemical reaction capacity and bioavailability of coal substances - Google Patents
Electrochemical pretreatment system and pretreatment process for enhancing biochemical reaction capacity and bioavailability of coal substances Download PDFInfo
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- CN109158044B CN109158044B CN201811214329.2A CN201811214329A CN109158044B CN 109158044 B CN109158044 B CN 109158044B CN 201811214329 A CN201811214329 A CN 201811214329A CN 109158044 B CN109158044 B CN 109158044B
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- 239000003245 coal Substances 0.000 title claims abstract description 71
- 239000000126 substance Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005842 biochemical reaction Methods 0.000 title claims abstract description 21
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 86
- 238000006243 chemical reaction Methods 0.000 claims abstract description 42
- 230000002378 acidificating effect Effects 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 5
- 238000005341 cation exchange Methods 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 15
- 239000007800 oxidant agent Substances 0.000 claims description 15
- 150000001768 cations Chemical class 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000003487 electrochemical reaction Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 21
- 229910001220 stainless steel Inorganic materials 0.000 description 14
- 239000010935 stainless steel Substances 0.000 description 14
- 229910002804 graphite Inorganic materials 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 239000004020 conductor Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000011847 coal-based material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000000035 biogenic effect Effects 0.000 description 1
- 238000010349 cathodic reaction Methods 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8362—Mixing plants; Combinations of mixers combining mixing with other treatments with chemical reactions
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/48—Mixing water in water-taps with other ingredients, e.g. air, detergents or disinfectants
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses an electrochemical pretreatment system and a pretreatment process for enhancing the biochemical reaction capacity and bioavailability of coal substances, wherein the electrochemical pretreatment system comprises a feeding system, a premixing tank, an auxiliary material adding system, a material conveying system, an electrochemical system and a discharging system. The method comprises the steps of preparing acidic pH at an anode through anode reaction and cathode reaction in an electrochemical system, preparing alkaline pH at a cathode, destroying the structure of coal substances through acidic pH condition and converting the coal substances, and simultaneously enabling the coal substances to be easily swelled and dissolved through alkaline pH condition so as to thoroughly treat the coal substances and open the structure of the coal substances, generating various organic compounds, improving the biochemical reaction capacity and bioavailability of the coal substances, and further producing other beneficial products through biological reaction or biochemical reaction.
Description
Technical Field
The invention relates to electrochemical treatment of coal substances, in particular to an electrochemical pretreatment system and a pretreatment process for enhancing the biochemical reaction capacity and bioavailability of the coal substances.
Background
Technology for biochemically converting coal-based materials (including various types of coals and physical derivatives of coals), including coal-based biogenic gas, biosolubility of coal-based materials, and coal-based chemicals, is often limited by low reactivity and low bioavailability of coal-based materials. The complex structure and hydrophobicity of coal-based materials are the main reasons for their low reactivity and low bioavailability. Therefore, pretreatment of coal substances is often required in practical application, and chemical methods and physical methods are mainly adopted. However, chemical pretreatment of coal materials, such as mixing the coal materials with solvents such as oxidizing agents, chelating agents, acids, bases, etc., often requires the use of large amounts of chemicals; while physical pretreatment methods such as heating methods, including hot air flushing or steam flushing, often require a significant amount of energy to be expended.
Electrochemical reaction in water mixtures (water-solid mixtures to pure water solutions) can change the nature of the substance by electrolysis. Wherein the anodic reaction is an oxidation reaction and generates protons (H + ) Resulting in an acidic pH; the cathodic reaction is a reduction reaction and generates hydroxide (OH) - ) Resulting in an alkaline pH. Under the condition of acidic pH, the structure of the coal substances can be destroyed and converted; under alkaline pH conditions, coal materials tend to swell and dissolve. As previously described, acid-base pretreatment of coal can improve the biochemical reaction capacity and bioavailability of coal-based materials.
The invention prepares acidic pH condition and alkaline pH condition in the system through anode reaction and reaction in electrochemical reaction, so as to improve the biochemical reaction capacity and bioavailability of coal substances without adding any acidic or alkaline chemical agent. Meanwhile, the pH value in the coal substance solution can be changed at any time by changing the anode and the cathode of the electrochemical reaction, so that the coal substance is thoroughly treated and the structure is opened, various organic compounds are generated, and the biochemical reaction capacity and bioavailability of the coal substance are improved.
Disclosure of Invention
The invention provides an electrochemical pretreatment system and a pretreatment process for enhancing the biochemical reaction capacity and bioavailability of coal substances aiming at the pretreatment of the coal substances.
The coal substances comprise various coals and physical derivatives of the coals.
The invention relates to an electrochemical pretreatment system for enhancing the biochemical reaction capacity and bioavailability of coal substances, which comprises a feeding system 1, a premixing tank 2, an auxiliary material adding system 3, a material conveying system 4, an electrochemical system 5 and a discharging system 6.
The feeding system 1 is mainly used for feeding coal raw materials into the premixing tank 2, and can be manual or mechanical, including but not limited to forklift trucks, conveyor belts, pumps and the like. In a specific implementation, the number of feed systems 1 includes, but is not limited to, 1 set.
The premix tank 2 is of any shape made of any material, such as stainless steel, plastic, etc. In a specific implementation, the number of premix tanks 2 includes, but is not limited to, 1.
The auxiliary material adding system 3 is mainly used for adding the oxidant into the premixing tank 2, and can be any mode of manual operation, mechanical operation and the like, including but not limited to forklift, conveyor belt, pump and the like. In practice, the number of auxiliary materials added to the system 3 includes, but is not limited to, 1 set, and auxiliary materials such as oxidant and the like can be added to the premix tank 2 through the feed system 1.
The material transfer system 4 comprises a material transfer pump 41 and a material transfer pipe 42 for transferring material from different reaction tanks to different systems. The material transfer pump 41 may be a commercially available pump, and the material transfer pipe 42 may be a commercially available pipe, and the material includes, but is not limited to, concrete, plastic, steel, etc. In a specific implementation, the number of material transfer pumps 41 and material transfer tubes 42 includes, but is not limited to, 1.
The electrochemical system 5 comprises a reaction tank 51, an electrochemical system cathode 52, an electrochemical system anode 53 and an electrochemical system lead 54; the electrochemical system cathode 52 and the electrochemical system anode 53 are connected by an electrochemical system lead 54 and an electrochemical system power source 55 and an electrochemical system switch 56 are provided in the circuit.
The electrochemical system 5 further comprises a cation exchange membrane 57 dividing the reaction tank 51 into a cathode reaction zone and an anode reaction zone for cation transfer between the electrochemical system cathode 52 and the electrochemical system anode 53.
The cation exchange membrane 57 may also be replaced by a proton transfer salt bridge 58 for cation transfer between the electrochemical system cathode 52 and the electrochemical system anode 53.
The reaction tank 51 is of any shape made of any material such as stainless steel, plastic, etc. In a specific implementation, the number of reaction tanks 51 includes, but is not limited to, 1.
The electrochemical system cathode 52 is formed of a conductive material such as carbon cloth, stainless steel fiber, stainless steel mesh, graphite particles or graphite blocks, activated carbon particles, etc. into a shape such as porous, multi-layered, block, granular, porous granular, etc., to form a large specific surface area. In a specific implementation, the number of electrochemical system cathodes 52 includes, but is not limited to, 1.
The electrochemical system anode 53 is formed into a shape such as porous, multi-layered, block, granular, porous granular, or the like by processing a conductive material such as carbon cloth, stainless steel fiber, stainless steel mesh, graphite particles or graphite blocks, activated carbon particles, or the like, to form a large specific surface area. In a specific implementation, the number of electrochemical system anodes 53 includes, but is not limited to, 1.
The electrochemical system lead 54 is made of conductive materials such as stainless steel, titanium, copper, aluminum, etc., and may be any commercially available power line.
Electrochemical system power source 55 is used to provide direct current to the electrochemical system, including but not limited to, commercial direct current power sources, alternating current to direct current converters, solar powered systems, and the like. In a specific implementation, the number of electrochemical system power sources 55 includes, but is not limited to, 1.
The electrochemical system switch 56 is used to control the switching of the electrochemical system and may be any commercially available switch. In a specific implementation, the number of electrochemical system switches 56 includes, but is not limited to, 1.
The cation exchange membrane 57 is used for cation transfer between the electrochemical system cathode 52 and the electrochemical system anode 53, and may be any commercially available cation exchange membrane. Alternatively, proton-transporting salt bridges 58 may be used in place of cation exchange membranes 57 for cation transfer between electrochemical system cathode 52 and electrochemical system anode 53. Proton transfer salt bridge 58 may be any commercially available or self-made salt bridge. In a specific implementation, the number of cation exchange membranes 57 or proton transport salt bridges 58 includes, but is not limited to, 1. In addition, the present invention can be operated without 57 and 58, and can generally treat coal (including various types of coal and physical derivatives of coal) and enhance its bioavailability, although it is possible to have an acid-base neutralization reaction in the middle of the two electrodes to reduce the efficiency.
The discharging system 6 is mainly used for discharging the materials reacted by the reaction tank 51, and can be manual or mechanical, including but not limited to forklift, conveyor belt, pump, etc. In a specific implementation, the number of outfeed systems 6 includes, but is not limited to, 1 set.
The invention relates to a pretreatment process for enhancing the biochemical reaction capacity and bioavailability of coal substances by utilizing the electrochemical pretreatment system, which comprises the following steps:
the coal material and water enter the premixing tank 2 through the feeding system 1, the premixed material is sent into the reaction tank 51 of the electrochemical system 5 through the material conveying pump 41 and the material conveying pipe 42, the anode reaction and the cathode reaction in the electrochemical system 5 are carried out, the acid pH is produced at the anode, the alkaline pH is produced at the cathode, the structure of the coal material is destroyed and converted under the acid pH condition, and the coal material is swelled and dissolved more easily under the alkaline pH condition, so that the thorough treatment of the coal material is realized, the structure of the coal material is opened, various organic compounds are produced, and the biochemical reaction capacity and bioavailability of the coal material are improved.
If necessary, an oxidizing agent may be added to the premix tank 2 via the adjuvant addition system 3. The oxidizing agent includes but is not limited to H 2 O 2 And/or O 3 . The mass ratio of the oxidant to the coal material is 0.0001:1 to 0.01:1.
In the electrochemical reaction process, the temperature is controlled between 1 and 100 ℃, the pressure is controlled between normal pressure and 3 standard atmospheric pressures, and the reaction is carried out under standing or stirring (the rotating speed is 1 to 200 rpm).
The volume ratio of water to coal material is 10:1 to 0.1:1.
Compared with other technologies, the invention has the beneficial effects that:
the electrochemical pretreatment system and the pretreatment process for enhancing the biochemical reaction capacity and the bioavailability of coal substances are characterized in that an anode reaction and a cathode reaction in the electrochemical reaction are adopted to manufacture acidic pH at an anode, manufacture alkaline pH at a cathode, destroy the structure of the coal substances and convert the coal substances through acidic pH conditions, and simultaneously swell and dissolve the coal substances easily through alkaline pH conditions so as to improve the biochemical reaction capacity and the bioavailability of the coal substances.
Drawings
Fig. 1 shows the pH change in a cathode (anode) and anode (anode) slurry water mixture after treatment by an electrochemical process. As can be seen from fig. 1, the electrochemical reaction causes a pH change in the mixture. The pH decreases in the region near the anode, becomes acidic, and the pH increases in the region near the cathode, becomes alkaline. But this acid-base will gradually neutralize as the mixture is mixed.
Fig. 2 shows the change of the soluble organic matter (dissolved organic concentrations) in the cathode (anode) slurry water mixture after the electrochemical process treatment. As can be seen from fig. 2, the reaction and pH change created by the electrochemical system breaks down, converts, dissolves macromolecules in the coal feedstock, significantly increasing the content of soluble organic carbon, which also means that the coal feedstock becomes more reactive and bioavailable.
FIG. 3 is a schematic diagram of an electrochemical pretreatment system for enhancing the biochemical reaction capacity and bioavailability of coal materials according to the present invention;
reference numerals in the drawings: 1 a feeding system; 2, premixing a tank; 3, adding auxiliary materials into the system; the material conveying system comprises a material conveying system, a material conveying pump and a material conveying pipe, wherein the material conveying system comprises a material conveying system, a material conveying pump and a material conveying pipe; 5 electrochemical system, 51 reaction tank, 52 electrochemical system cathode, 53 electrochemical system anode, 54 electrochemical system wire, 55 electrochemical system power source, 56 electrochemical system switch, 57 cation exchange membrane, 58 proton transfer salt bridge.
Detailed Description
As shown in FIG. 3, the electrochemical pretreatment system for enhancing the biochemical reaction capacity and bioavailability of coal substances comprises a feeding system 1, a premixing tank 2, an auxiliary material adding system 3, a material conveying system 4, an electrochemical system 5 and a discharging system 6.
The feeding system 1 is mainly used for feeding coal raw materials into the premixing tank 2, and can be manual or mechanical, including but not limited to forklift trucks, conveyor belts, pumps and the like. In a specific implementation, the number of feed systems 1 includes, but is not limited to, 1 set.
The premix tank 2 is of any shape made of any material, such as stainless steel, plastic, etc. In a specific implementation, the number of premix tanks 2 includes, but is not limited to, 1.
The auxiliary material adding system 3 is mainly used for adding the oxidant into the premixing tank 2, and can be any mode of manual operation, mechanical operation and the like, including but not limited to forklift, conveyor belt, pump and the like. In practice, the number of auxiliary materials added to the system 3 includes, but is not limited to, 1 set, and auxiliary materials such as oxidant and the like can be added to the premix tank 2 through the feed system 1.
The material transfer system 4 comprises a material transfer pump 41 and a material transfer pipe 42 for transferring material from different reaction tanks to different systems. The material transfer pump 41 may be a commercially available pump, and the material transfer pipe 42 may be a commercially available pipe, and the material includes, but is not limited to, concrete, plastic, steel, etc. In a specific implementation, the number of material transfer pumps 41 and material transfer tubes 42 includes, but is not limited to, 1.
The electrochemical system 5 comprises a reaction tank 51, an electrochemical system cathode 52, an electrochemical system anode 53 and an electrochemical system lead 54; the electrochemical system cathode 52 and the electrochemical system anode 53 are connected by an electrochemical system lead 54 and an electrochemical system power source 55 and an electrochemical system switch 56 are provided in the circuit.
The electrochemical system 5 further comprises a cation exchange membrane 57 dividing the reaction tank 51 into a cathode reaction zone and an anode reaction zone for cation transfer between the electrochemical system cathode 52 and the electrochemical system anode 53.
The cation exchange membrane 57 may also be replaced by a proton transfer salt bridge 58 for cation transfer between the electrochemical system cathode 52 and the electrochemical system anode 53.
The reaction tank 51 is of any shape made of any material such as stainless steel, plastic, etc. In a specific implementation, the number of reaction tanks 51 includes, but is not limited to, 1.
The electrochemical system cathode 52 is formed of a conductive material such as carbon cloth, stainless steel fiber, stainless steel mesh, graphite particles or graphite blocks, activated carbon particles, etc. into a shape such as porous, multi-layered, block, granular, porous granular, etc., to form a large specific surface area. In a specific implementation, the number of electrochemical system cathodes 52 includes, but is not limited to, 1.
The electrochemical system anode 53 is formed into a shape such as porous, multi-layered, block, granular, porous granular, or the like by processing a conductive material such as carbon cloth, stainless steel fiber, stainless steel mesh, graphite particles or graphite blocks, activated carbon particles, or the like, to form a large specific surface area. In a specific implementation, the number of electrochemical system anodes 53 includes, but is not limited to, 1.
The electrochemical system lead 54 is made of conductive materials such as stainless steel, titanium, copper, aluminum, etc., and may be any commercially available power line.
Electrochemical system power source 55 is used to provide direct current to the electrochemical system, including but not limited to, commercial direct current power sources, alternating current to direct current converters, solar powered systems, and the like. In a specific implementation, the number of electrochemical system power sources 55 includes, but is not limited to, 1.
The electrochemical system switch 56 is used to control the switching of the electrochemical system and may be any commercially available switch. In a specific implementation, the number of electrochemical system switches 56 includes, but is not limited to, 1.
The cation exchange membrane 57 is used for cation transfer between the electrochemical system cathode 52 and the electrochemical system anode 53, and may be any commercially available cation exchange membrane. Alternatively, proton-transporting salt bridges 58 may be used in place of cation exchange membranes 57 for cation transfer between electrochemical system cathode 52 and electrochemical system anode 53. Proton transfer salt bridge 58 may be any commercially available or self-made salt bridge. In a specific implementation, the number of cation exchange membranes 57 or proton transport salt bridges 58 includes, but is not limited to, 1. In addition, the present invention can be operated without 57 and 58, and can generally treat coal (including various types of coal and physical derivatives of coal) and enhance its bioavailability, although it is possible to have an acid-base neutralization reaction in the middle of the two electrodes to reduce the efficiency.
The discharging system 6 is mainly used for discharging the materials reacted by the reaction tank 51, and can be manual or mechanical, including but not limited to forklift, conveyor belt, pump, etc. In a specific implementation, the number of outfeed systems 6 includes, but is not limited to, 1 set.
The invention relates to a pretreatment process for enhancing the biochemical reaction capacity and bioavailability of coal substances by utilizing the electrochemical pretreatment system, which comprises the following steps:
the coal material enters the premixing tank 2 through the feeding system 1, if necessary, the oxidant can be added through the auxiliary material adding system 3, the premixed material is sent into the reaction tank 51 of the electrochemical system 5 through the material conveying pipe 42 by the material conveying pump 41, the acidic pH is manufactured at the anode through the anode reaction and the cathode reaction in the electrochemical system 5, the alkaline pH is manufactured at the cathode, the structure of the coal material is destroyed and converted through the acidic pH condition, and the coal material is swelled and dissolved more easily through the alkaline pH condition, so that the coal material is thoroughly treated and the structure is opened, various organic compounds are generated, and the biochemical reaction capability and the bioavailability of the coal material are improved.
The oxidizing agent includes but is not limited to H 2 O 2 And/or O 3 . The mass ratio of the oxidant to the coal material is 0.0001:1 to 0.01:1.
In the electrochemical reaction process, the temperature is controlled between 1 and 100 ℃, the pressure is controlled between normal pressure and 3 standard atmospheric pressures, and the reaction is carried out under standing or stirring (the rotating speed is 1 to 200 rpm).
The volume ratio of water to coal substances is 10:1 to 0.1:1.
Claims (8)
1. The pretreatment process for enhancing the biochemical reaction capacity and bioavailability of coal substances by using an electrochemical pretreatment system is characterized by comprising the following steps of:
the coal material and water enter a premixing tank through a feeding system, the premixed material is sent into a reaction tank of an electrochemical system through a material conveying pipe by a material conveying pump, acidic pH is manufactured at an anode through anode reaction and cathode reaction in the electrochemical system, alkaline pH is manufactured at a cathode, the structure of the coal material is destroyed and converted through acidic pH conditions, and meanwhile, the coal material is easier to swell and dissolve through alkaline pH conditions, so that the coal material is thoroughly treated and the structure of the coal material is opened, various organic compounds are produced, and the biochemical reaction capacity and bioavailability of the coal material are improved;
the electrochemical pretreatment system comprises a feeding system, a premixing tank, an auxiliary material adding system, a material conveying system, an electrochemical system and a discharging system;
the feeding system is mainly used for feeding coal material raw materials into the premixing tank; the auxiliary material adding system is mainly used for adding an oxidant into the premixing tank;
the electrochemical system comprises a reaction tank, an electrochemical system cathode, an electrochemical system anode and an electrochemical system lead; the electrochemical system cathode and the electrochemical system anode are communicated through an electrochemical system lead, and an electrochemical system power supply and an electrochemical system switch are arranged in the lead.
2. The pretreatment process according to claim 1, wherein:
in the electrochemical pretreatment system, the electrochemical system further comprises a cation exchange membrane dividing the reaction tank into a cathode reaction area and an anode reaction area for cation transfer between the cathode of the electrochemical system and the anode of the electrochemical system.
3. The pretreatment process according to claim 2, wherein:
in the electrochemical pretreatment system, the cation exchange membrane is replaced by a proton transfer salt bridge for cation transfer between the electrochemical system cathode and the electrochemical system anode.
4. The pretreatment process according to claim 1, wherein:
and adding an oxidant into the premixing tank through an auxiliary material adding system.
5. The pretreatment process according to claim 4, wherein:
the oxidizing agent includes but is not limited to H 2 O 2 And/or O 3 。
6. The pretreatment process according to claim 4 or 5, wherein:
the mass ratio of the oxidant to the coal material is 0.0001:1 to 0.01:1.
7. The pretreatment process according to claim 1, wherein:
in the electrochemical reaction process, the temperature is controlled to be 1-100 ℃, the pressure is controlled to be normal pressure to 3 standard atmospheric pressures, and the reaction can be carried out under standing or stirring.
8. The pretreatment process according to claim 1, wherein:
the volume ratio of the water to the coal material is 10:1 to 0.1:1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811214329.2A CN109158044B (en) | 2018-10-18 | 2018-10-18 | Electrochemical pretreatment system and pretreatment process for enhancing biochemical reaction capacity and bioavailability of coal substances |
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| CN201811214329.2A CN109158044B (en) | 2018-10-18 | 2018-10-18 | Electrochemical pretreatment system and pretreatment process for enhancing biochemical reaction capacity and bioavailability of coal substances |
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| CN109158044B true CN109158044B (en) | 2024-03-08 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430175A (en) * | 1981-12-22 | 1984-02-07 | Rutgerswerke Aktiengesellschaft | Process for the electrochemical conversion of coal and use of the reaction products |
| CN102282295A (en) * | 2008-12-18 | 2011-12-14 | 昆士兰大学 | Process for the production of chemicals |
| CN209564931U (en) * | 2018-10-18 | 2019-11-01 | 元泰丰（北京）生物科技有限公司 | A kind of electrochemical pre-treatment system enhancing coal substance biochemical reaction ability and bioavailability |
-
2018
- 2018-10-18 CN CN201811214329.2A patent/CN109158044B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430175A (en) * | 1981-12-22 | 1984-02-07 | Rutgerswerke Aktiengesellschaft | Process for the electrochemical conversion of coal and use of the reaction products |
| CN102282295A (en) * | 2008-12-18 | 2011-12-14 | 昆士兰大学 | Process for the production of chemicals |
| CN209564931U (en) * | 2018-10-18 | 2019-11-01 | 元泰丰（北京）生物科技有限公司 | A kind of electrochemical pre-treatment system enhancing coal substance biochemical reaction ability and bioavailability |
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