CN101592432B - Method for promoting hydration, solidification and separation of coal mine mash gas mixture - Google Patents
Method for promoting hydration, solidification and separation of coal mine mash gas mixture Download PDFInfo
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- CN101592432B CN101592432B CN2009100724784A CN200910072478A CN101592432B CN 101592432 B CN101592432 B CN 101592432B CN 2009100724784 A CN2009100724784 A CN 2009100724784A CN 200910072478 A CN200910072478 A CN 200910072478A CN 101592432 B CN101592432 B CN 101592432B
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Abstract
The invention discloses a method for promoting hydration, solidification and separation of a coal mine mash gas mixture, which relates to a method for promoting separation of mash gas. The method solves the problems that the prior method for hydrating, solidifying and separating the coal mine mash gas mixture has long induction time of generating a hydrate of 59.8 percent CH4, low growing rate ofa hydrate of 40.4 percent CH4, low concentration of the CH4 in the mash gas mixture, and low separation efficiency. The method comprises the following steps: firstly, adding a separation carrier; secondly, adding an accelerating agent into a reaction kettle, and then pumping out air; thirdly, extracting the mash gas from a coal mine and compressing the mash gas into the reaction kettle to performthe hydration and the solidification; and fourthly, making the hydrates after the hydration and the solidification enter into a storage tank to finish the operation. In the method, the induction timeof growing the hydrate of 59.8 percent CH4 is 51 minutes. The concentration of the CH4 in the mash gas mixture is improved by more than 10 percent, and the separation efficiency is high. The growing rate of the hydrate of 40.4 percent CH4 reaches up to 23.03*10<-3> mol per minute.
Description
Technical field
The present invention relates to the promotion method that a kind of methane gas hydration curing separates.
Background technology
Coal mine gas is the significant risk source that mine safety is produced, and is to utilize clean energy resource, is the key industry gas of environmental disruption.According to statistics; high gas of China and gas projecting mine account for about half of whole mines; the death toll that annual gas accident causes accounts for 1/3 of the total death toll of coal mining accident, and the gas comprehensive utilization is all significant for Safety of Coal Mine Production, energy savings, protection environment.This shows that the key of coal mine gas utilization is CH
4Separation and concentrate.Mainly contain separation technology such as pressure swing adsorption method, low temperature processing at present, but existing gas separation method ubiquity separation costs height, methane concentration must reach more than 40% in the requirement mash gas extraction gas, could realize the separation of gas mist, mash gas extraction gases methane content is lower than 30% gas mist separation difficulty.Yet the gas of the most of mine extractions of China has 40% stock number to belong to the middle light concentration gas of methane concentration below 30%, and because of its complicated component, the concentration instability so can not effectively utilize and remote the conveying, is difficult to form scale and benefit.Existing separation method is handled the product that obtains and is all stored or transportation with high-pressure gaseous or low temperature liquid, poor stability, and the security deficiency need store and transport in special gas holding vessel, stores the cost height of transportation.
At present, though solved the problems referred to above, there is the phenomenon that the hydration separation induction time is long, the rate of departure is little in the hydration solidification separation method of coal mine mash gas mixture for the mine gas of low concentration.For example, concentration is 59.8% CH
4The induction time that generates of hydrate reach 129min, concentration is 40.4% CH
4The hydrate growth rate is low, only is 2.02 * 10
-3Mol/min, CH in the methane gas mixture
4Concentration is low, and separative efficiency is low.
Summary of the invention
The present invention is 59.8% CH for there is concentration in the hydration solidification separation method that solves existing coal mine mash gas mixture
4The induction time that generates of hydrate long, concentration is 40.4% CH
4The hydrate growth rate is low, CH in the methane gas mixture
4Concentration is low, the problem that separative efficiency is low, and the promotion method that provides a kind of coal mine mash gas mixture hydration curing to separate.
The promotion method that the coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 30%～90% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that concentration is that sodium dodecyl sulfate solution and/or the concentration of 0.1～0.4mol/L is 0.5～2mol/L tetrahydrofuran solution, and the addition of promoter is to add 0.3～0.8L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 0～5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4～11MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is sponge or foam metal in the step 1, and sponge is a polyurethane sponge, and foam metal is foamed aluminium, foam copper or foam stainless steel.
The promotion method principle that coal mine mash gas mixture hydration curing of the present invention separates is as follows: utilize in the time of 0 ℃ CH
4, N
2, O
2Hydrate phase balance pressure be respectively 2.56MPa, 14.30MPa and 11.10MPa, so the present invention makes the CH of easy generation hydrate by control experimental pressure and the promoter concentration and the method for adding carrier of separating
4Become solid-stately from gaseous state, realize CH
4The purpose of separating fast with other component gas, and then the methane hydrate that separation obtains stored and transport with solid-state gas form.Method of the present invention is simple to operate, equipment performance requires low, reduced the cost that separates, the separated product methane hydrate stores convenient transportation, reduced the cost that stores transportation, and the inventive method can separation of methane concentration be lower than 30% methane gas, has reduced the waste of colliery mash gas extraction gas.
The carrier of separating sponge of adding among the present invention has increased mass exchange between methane gas and accelerator solution phase as a kind of porous media, has promoted hydration separation process material Transfer; The carrier of separating foam metal porosity height that adds among the present invention, specific area is big, and good heat conduction effect has been accelerated hydration separation process material Transfer and heat transmission, has improved the separating rate of methane gas mixture.
After adding the carrier of separating sponge among the present invention, concentration is 59.8% CH
4The induction time that generates of hydrate the shortest, for 51min (the same terms hydrate production induction time of no sponge down is 129min), shortened induction time.CH in the methane gas mixture
4Concentration has improved more than 10%, the separative efficiency height.After adding the carrier of separating foam metal, concentration is 40.4% CH
4The hydrate growth rate is 23.03 * 10
-3Mol/min (and the hydrate growth rate of the non-foam metal under the same terms is 2.02 * 10
-3Mol/min), improve the hydrate growth rate, realized the purpose that coal mine gas gas fast hydrating separates.
The specific embodiment
The specific embodiment one: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 30%～90% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that concentration is that sodium dodecyl sulfate solution and/or the concentration of 0.1～0.4mol/L is 0.5～2mol/L tetrahydrofuran solution, and the addition of promoter is to add 0.3～0.8L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 0～5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4～11MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is sponge or foam metal in the step 1, and sponge is a polyurethane sponge, and foam metal is foamed aluminium, foam copper or foam stainless steel.
The reactor that present embodiment is used is visual reactor.
Promoter is that the sodium dodecyl sulfate solution of 0.1～0.4mol/L and concentration are 0.5～2mol/L tetrahydrofuran solution when forming by concentration in the present embodiment step 2, and then concentration is that sodium dodecyl sulfate solution and the concentration of 0.1～0.4mol/L are that 0.5～2mol/L tetrahydrofuran solution can be according to arbitrary volume than mixing.
Reactor places constant temperature control box in the present embodiment step 3, start constant temperature control box, set the temperature and pressure of gas mist hydration curing, after solution-air in the reactor-hydrate three-phase equilibrium, water intaking compound component is carried out chromatography, detects CH in the mash gas extraction gas of colliery
4The separation refining effect.
After adding the carrier of separating sponge after testing in the present embodiment, concentration is 59.8% CH
4The induction time that generates of hydrate the shortest, be 51min.CH in the methane gas mixture
4Concentration has improved more than 10%, the separative efficiency height.After adding the carrier of separating foam metal, concentration is 40.4% CH
4The hydrate growth rate is 23.03 * 10
-3Mol/min.
The specific embodiment two: what present embodiment and the specific embodiment one were different is to add the carrier of separating that accounts for reactor cumulative volume 30% in the step 1 in reactor.Other step and parameter are identical with the specific embodiment one.
The specific embodiment three: what present embodiment and the specific embodiment one were different is to add the carrier of separating that accounts for reactor cumulative volume 50% in the step 1 in reactor.Other step and parameter are identical with the specific embodiment one.
The specific embodiment four: what present embodiment and the specific embodiment one were different is to add the carrier of separating that accounts for reactor cumulative volume 70% in the step 1 in reactor.Other step and parameter are identical with the specific embodiment one.
The specific embodiment five: present embodiment and the specific embodiment two, three or four are different is that the density of sponge in the step 1 is 0.3～0.5g/cm
3, porosity is 80%～95%, and through-hole rate is 80%～90%, and average pore size is 0.1～0.3mm.Other step and parameter are identical with the specific embodiment two, three or four.
The specific embodiment six: present embodiment and the specific embodiment two, three or four are different is that the porosity of foam metal in the step 1 is 80%～90%, and through-hole rate is 85%～90%, and major bore is 0.4～2.5mm.Other step and parameter are identical with the specific embodiment two, three or four.
The specific embodiment seven: what present embodiment and the specific embodiment six were different is that promoter is that concentration is the sodium dodecyl sulfate solution of 0.1mol/L in the step 2.Other step and parameter are identical with the specific embodiment six.
The specific embodiment eight: what present embodiment and the specific embodiment six were different is that promoter is that concentration is the sodium dodecyl sulfate solution of 0.4mol/L in the step 2.Other step and parameter are identical with the specific embodiment six.
The specific embodiment nine: what present embodiment and the specific embodiment six were different is that promoter is that concentration is the sodium dodecyl sulfate solution of 0.2mol/L in the step 2.Other step and parameter are identical with the specific embodiment six.
The specific embodiment ten: what present embodiment and the specific embodiment six were different is that promoter is that concentration is the sodium dodecyl sulfate solution of 0.3mol/L in the step 2.Other step and parameter are identical with the specific embodiment six.
The specific embodiment 11: what present embodiment and the specific embodiment six were different is that promoter is that concentration is the 0.5mol/L tetrahydrofuran solution in the step 2.Other step and parameter are identical with the specific embodiment six.
The specific embodiment 12: what present embodiment and the specific embodiment six were different is that promoter is that concentration is the 2mol/L tetrahydrofuran solution in the step 2.Other step and parameter are identical with the specific embodiment six.
The specific embodiment 13: what present embodiment and the specific embodiment six were different is that promoter is that concentration is the 1mol/L tetrahydrofuran solution in the step 2.Other step and parameter are identical with the specific embodiment six.
The specific embodiment 14: what present embodiment and the specific embodiment six were different is that promoter is that concentration is the 1.5mol/L tetrahydrofuran solution in the step 2.Other step and parameter are identical with the specific embodiment six.
The specific embodiment 15: present embodiment and the specific embodiment 11,12,13 or 14 are different is that promoter is that sodium dodecyl sulfate solution and the concentration of 0.1mol/L is formed for the 0.5mol/L tetrahydrofuran solution by concentration in the step 2.Other step and parameter are identical with the specific embodiment 11,12,13 or 14.
The specific embodiment 16: present embodiment and the specific embodiment 15 are different is that promoter is that sodium dodecyl sulfate solution and the concentration of 0.4mol/L is formed for the 2mol/L tetrahydrofuran solution by concentration in the step 2.Other step and parameter are identical with the specific embodiment 15.
The specific embodiment 17: present embodiment and the specific embodiment 15 are different is that promoter is that sodium dodecyl sulfate solution and the concentration of 0.2mol/L is formed for the 1mol/L tetrahydrofuran solution by concentration in the step 2.Other step and parameter are identical with the specific embodiment 15.
The specific embodiment 18: present embodiment and the specific embodiment 15 are different is that promoter is that sodium dodecyl sulfate solution and the concentration of 0.3mol/L is formed for the 1.5mol/L tetrahydrofuran solution by concentration in the step 2.Other step and parameter are identical with the specific embodiment 15.
The specific embodiment 19: present embodiment and the specific embodiment 16,17 or 18 are different is that the addition of promoter in the step 2 is to add 0.3L in every liter of reactor volume.Other step and parameter are identical with the specific embodiment 16,17 or 18.
The specific embodiment 20: present embodiment and the specific embodiment 19 are different is that the addition of promoter in the step 2 is to add 0.8L in every liter of reactor volume.Other step and parameter are identical with the specific embodiment 19.
The specific embodiment 21: present embodiment and the specific embodiment 19 are different is that the addition of promoter in the step 2 is to add 0.5L in every liter of reactor volume.Other step and parameter are identical with the specific embodiment 19.
The specific embodiment 22: present embodiment and the specific embodiment 19 are different is that the addition of promoter in the step 2 is to add 0.6L in every liter of reactor volume.Other step and parameter are identical with the specific embodiment 19.
The specific embodiment 23: what present embodiment and the specific embodiment 20,21 or 22 were different is that operating temperature is 0 ℃ in the step 3, and operating pressure is 11MPa.Other step and parameter are identical with the specific embodiment 20,21 or 22.
The specific embodiment 24: what present embodiment and the specific embodiment 23 were different is that operating temperature is 5 ℃ in the step 3, and operating pressure is 4MPa.Other step and parameter are identical with the specific embodiment 23.
The specific embodiment 25: what present embodiment and the specific embodiment 23 were different is that operating temperature is 2 ℃ in the step 3, and operating pressure is 6MPa.Other step and parameter are identical with the specific embodiment 23.
The specific embodiment 26: what present embodiment and the specific embodiment 23 were different is that operating temperature is 4 ℃ in the step 3, and operating pressure is 9MPa.Other step and parameter are identical with the specific embodiment 23.
The specific embodiment 27: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 40% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.2mol/L is formed for the 0.5mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.3L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 1.5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a sponge in the step 1, and sponge is a polyurethane sponge.
CH in the present embodiment gas mist
4Volumetric concentration be 24.90%, N
2Volumetric concentration be 60.20%, O
2Volumetric concentration be 14.90%, separate CH in the hydrate that generates through the present embodiment hydration curing
4Volumetric concentration reached 39.10%, CH in the hydrate
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration improved 14.20%.
Present embodiment is separated the CH that obtains
4Hydrate decomposites at normal temperatures and pressures and is CH
4And water, divide the water that dissociates recyclable utilization again, reduce the waste of water resource.
The specific embodiment 28: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 30% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.2mol/L is formed for the 0.5mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.4L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 1.5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a sponge in the step 1, and sponge is a polyurethane sponge.
CH in the present embodiment gas mist
4Volumetric concentration be 40.40%, N
2Volumetric concentration be 49.50%, O
2Volumetric concentration be 10.10%, separate CH in the hydrate that generates through the present embodiment hydration curing
4Volumetric concentration reached 52.48%, CH in the hydrate
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration improved 12.08%.
The specific embodiment 29: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 60% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.2mol/L is formed for the 0.5mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.5L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 1.5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a sponge in the step 1, and sponge is a polyurethane sponge.
CH in the present embodiment gas mist
4Volumetric concentration be 59.50%, N
2Volumetric concentration be 35.20%, O
2Volumetric concentration be 5.30%, separate the back through the present embodiment hydration curing and generate CH in the hydrate
4Volumetric concentration reached 69.80%, CH in the hydrate
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration CH
4Improved 10.30%.
The specific embodiment 30: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 70% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.2mol/L is formed for the 0.5mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.6L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 1.5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a foam metal in the step 1, and foam metal is a foamed aluminium.
CH in the present embodiment gas mist
4Volumetric concentration be 24.90%, N
2Volumetric concentration be 60.20%, O
2Volumetric concentration be 14.90%, separate generating CH in the hydrate through the present embodiment hydration curing
4Volumetric concentration reached 41.86%, hydrate mutually in CH
4Volumetric concentration than CH in the methane gas mixture
4Improved 16.96%.
The specific embodiment 31: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 80% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.2mol/L is formed for the 0.5mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.7L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 1.5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a foam metal in the step 1, and foam metal is a foam copper.
CH in the present embodiment gas mist
4Volumetric concentration be 40.40%, N
2Volumetric concentration be 49.50%, O
2Volumetric concentration be 10.10%, separate CH in the hydrate that generates through the present embodiment hydration curing
4Volumetric concentration reached 59.20%, hydrate mutually in CH
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration improved 18.80%.
The specific embodiment 32: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 90% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.2mol/L is formed for the 0.5mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.8L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 1.5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a foam metal in the step 1, and foam metal is a foamed aluminium.
CH in the present embodiment gas mist
4Volumetric concentration be 59.50%, N
2Volumetric concentration be 35.20%, O
2Volumetric concentration be 5.30%, separate CH in the hydrate that generates through the present embodiment hydration curing
4Volumetric concentration reached 72.36%, CH in the hydrate
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration improved 12.86%.
The specific embodiment 33: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 30% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.3mol/L is formed for the 1mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.3L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 0 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 11MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a sponge in the step 1, and sponge is a polyurethane sponge.
CH in the present embodiment gas mist
4Volumetric concentration be 55.50%, N
2Volumetric concentration be 38.20%, O
2Volumetric concentration be 6.30%, separate CH in the hydrate that generates through the present embodiment hydration curing
4Volumetric concentration reached 71.30%, CH in the hydrate
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration improved 15.80%.
The specific embodiment 34: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 55% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.1mol/L is formed for the 1.5mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.5L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 1 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 6MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a foam metal in the step 1, and foam metal is the foam stainless steel.
CH in the present embodiment gas mist
4Volumetric concentration be 35.50%, N
2Volumetric concentration be 50.80%, O
2Volumetric concentration be 13.70%, separate CH in the hydrate that generates through the present embodiment hydration curing
4Volumetric concentration reached 55.10%, hydrate mutually in CH
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration improved 19.60%.
The specific embodiment 35: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 65% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.1mol/L is formed for the 2mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.6L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 2 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 8MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a sponge in the step 1, and sponge is a polyurethane sponge.
CH in the present embodiment gas mist
4Volumetric concentration be 24.90%, N
2Volumetric concentration be 60.20%, O
2Volumetric concentration be 14.90%, separate CH in the hydrate that generates through the present embodiment hydration curing
4Volumetric concentration reached 38.20%, CH in the hydrate
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration improved 13.30%.
The specific embodiment 36: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 75% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.1mol/L is formed for the 0.5mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.6L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 3 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 9MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a foam metal in the step 1, and foam metal is a foam copper.
CH in the present embodiment gas mist
4Volumetric concentration be 24.90%, N
2Volumetric concentration be 60.20%, O
2Volumetric concentration be 14.90%, separate generating CH in the hydrate through the present embodiment hydration curing
4Volumetric concentration reached 40.15%, hydrate mutually in CH
4Volumetric concentration than CH in the methane gas mixture
4Improved 15.25%.
The specific embodiment 37: the promotion method that present embodiment coal mine mash gas mixture hydration curing separates is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 90% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that sodium dodecyl sulfate solution and/or the concentration of 0.4mol/L is formed for the 2mol/L tetrahydrofuran solution by concentration, and the addition of promoter is to add 0.8L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 11MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has realized that promptly coal mine mash gas mixture closes the promotion of solidifying separation; Wherein carrier of separating is a foam metal in the step 1, and foam metal is the foam stainless steel.
CH in the present embodiment gas mist
4Volumetric concentration be 59.50%, N
2Volumetric concentration be 35.20%, O
2Volumetric concentration be 5.30%, separate the back through the present embodiment hydration curing and generate CH in the hydrate
4Volumetric concentration reached 70.60%, CH in the hydrate
4Volumetric concentration than CH in the methane gas mixture
4Volumetric concentration CH
4Improved 11.10%.
Claims (10)
1. the promotion method that the coal mine mash gas mixture hydration curing separates is characterized in that the promotion method of coal mine mash gas mixture hydration curing separation is carried out according to following steps: one, add the carrier of separating that accounts for reactor cumulative volume 30%～90% in reactor; Two, promoter is added in the reactor, use vavuum pump to extract air in the reactor out, wherein promoter is that concentration is that sodium dodecyl sulfate solution and/or the concentration of 0.1～0.4mol/L is the tetrahydrofuran solution of 0.5～2mol/L, and the addition of promoter is to add 0.3～0.8L in every liter of reactor volume; Three, adopting gas pressurization system that coal mine mash gas mixture is pressed into reactor, is 0～5 ℃ in operating temperature, and operating pressure is to carry out hydration curing under the condition of 4～11MPa; Four, hydrate enters holding vessel in the step 3, and gas entered in the air after hydration curing finished, and has promptly realized the promotion that the coal mine mash gas mixture hydration curing separates; Wherein carrier of separating is sponge or foam metal in the step 1, and sponge is a polyurethane sponge, and foam metal is foamed aluminium, foam copper or foam stainless steel.
2. the promotion method that coal mine mash gas mixture hydration curing according to claim 1 separates is characterized in that adding in the step 1 carrier of separating that accounts for reactor cumulative volume 50% in reactor.
3. the promotion method that coal mine mash gas mixture hydration curing according to claim 1 separates is characterized in that adding in the step 1 carrier of separating that accounts for reactor cumulative volume 70% in reactor.
4. according to the promotion method of claim 2 or 3 described coal mine mash gas mixture hydration curings separation, the density that it is characterized in that sponge in the step 1 is 0.3～0.5g/cm
3, porosity is 80%～95%, and through-hole rate is 80%～90%, and average pore size is 0.1～0.3mm.
5. according to the promotion method of claim 2 or 3 described coal mine mash gas mixture hydration curings separation, the porosity that it is characterized in that foam metal in the step 1 is 80%～90%, and through-hole rate is 85%～90%, and major bore is 0.4～2.5mm.
6. the promotion method that coal mine mash gas mixture hydration curing according to claim 5 separates is characterized in that promoter is that concentration is the sodium dodecyl sulfate solution of 0.2mol/L in the step 2.
7. the promotion method that coal mine mash gas mixture hydration curing according to claim 5 separates is characterized in that promoter is that concentration is the sodium dodecyl sulfate solution of 0.3mol/L in the step 2.
8. the promotion method that coal mine mash gas mixture hydration curing according to claim 5 separates is characterized in that promoter is that concentration is the tetrahydrofuran solution of 1mol/L in the step 2.
9. the promotion method that coal mine mash gas mixture hydration curing according to claim 5 separates is characterized in that promoter is that concentration is the tetrahydrofuran solution of 1.5mol/L in the step 2.
10. according to the promotion method of claim 6,7,8 or 9 described coal mine mash gas mixture hydration curings separation, the addition that it is characterized in that promoter in the step 2 is to add 0.5L in every liter of reactor volume.
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| CN101844026A (en) * | 2010-06-01 | 2010-09-29 | 中国石油大学(北京) | Novel dehydration drying method |
| CN105424819B (en) * | 2016-01-16 | 2018-03-06 | 黑龙江科技大学 | Ion concentration multilayer position monitoring device and monitoring method during gaseous mixture hydration reaction |
| CN107551954A (en) * | 2017-08-15 | 2018-01-09 | 华南理工大学 | A kind of method that fast hydrating gas storage is realized using hydrophobically modified foam metal |
| CN109422614A (en) * | 2017-08-26 | 2019-03-05 | 镇江严彦气体有限公司 | A kind of promotion method of mixed gas separation |
| CN108295777A (en) * | 2018-03-30 | 2018-07-20 | 清华大学深圳研究生院 | A kind of gas hydrate reinforcing generation method |
| CN109355112A (en) * | 2018-11-13 | 2019-02-19 | 黑龙江科技大学 | Step rotation shearing device for gas hydration separation |
| CN114702995A (en) * | 2022-04-06 | 2022-07-05 | 中国科学院广州能源研究所 | Gas hydrate synthesis method and device |
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