CN116857007A - Underground co-curing method and system for carbon-containing liquid and carbon-containing gas - Google Patents
Underground co-curing method and system for carbon-containing liquid and carbon-containing gas Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
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- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
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Abstract
本发明属于碳减排和碳封存领域，并具体公开了一种含碳液体和含碳气体地下共固化方法及系统，其基于实际地质条件和预设反应物类型及配比，预测待封存含碳液体和含碳气体共固化反应时含碳气体理论每小时转化率和含碳液体理论每小时固化率，进而确定含碳液体和含碳气体的注入方式：若含碳气体理论每小时转化率大于10％，则同时注入含碳液体和含碳气体；否则先注入含碳液体，当理论含碳液体固化程度大于80％后，注入含碳气体，实现含碳气体和含碳液体地下共固化。本发明利用含碳液体和含碳气体之间的反应，针对性选择地下共固化方法，大幅提升地下固碳效率，可实现来源广泛的含碳液体和含碳气体共固化，实现地下大规模固碳。
The invention belongs to the field of carbon emission reduction and carbon storage, and specifically discloses an underground co-solidification method and system of carbon-containing liquid and carbon-containing gas, which predicts the content to be stored based on actual geological conditions and preset reactant types and proportions. During the co-solidification reaction of carbon liquid and carbon-containing gas, the theoretical hourly conversion rate of carbon-containing gas and the theoretical hourly solidification rate of carbon-containing liquid are determined, and then the injection method of carbon-containing liquid and carbon-containing gas is determined: If the theoretical hourly conversion rate of carbon-containing gas is If it is greater than 10%, then inject carbonaceous liquid and carbonaceous gas at the same time; otherwise, inject carbonaceous liquid first, and when the theoretical solidification degree of carbonaceous liquid is greater than 80%, inject carbonaceous gas to achieve underground co-solidification of carbonaceous gas and carbonaceous liquid. . This invention utilizes the reaction between carbon-containing liquid and carbon-containing gas to selectively select underground co-solidification methods to greatly improve underground carbon fixation efficiency. It can realize the co-solidification of carbon-containing liquid and carbon-containing gas from a wide range of sources and realize large-scale underground solidification. carbon.
Description
Technical Field
The invention belongs to the field of carbon emission reduction and carbon sequestration, and in particular relates to a method and a system for underground co-curing of carbon-containing liquid and carbon-containing gas.
Background
With the increasing emphasis on ergonomic activities, the problem of how to properly treat organic solid waste and greenhouse gases is a formidable challenge to be solved. Direct disposal of organic solid waste will result in a large amount of carbon emissions, causing serious environmental pollution, and therefore new technologies need to be explored and developed for large-scale efficient treatment of organic waste and greenhouse gases.
The conventional treatment methods of the organic solid waste mainly comprise landfill, combustion and the like, but the method can generate a large amount of carbon dioxide isothermal chamber gas and harm the environment. The organic solid waste is a potentially available abundant carbon resource, and can form carbon-containing liquid with high carbon content, high reactivity and strong fluidity through various conversion modes, wherein the carbon-containing liquid is rich in oxygen-containing active functional groups, and self-polymerization reaction is easy to generate coke under high pressure conditions.
Disclosure of Invention
In response to the above-mentioned deficiencies or improvements of the prior art, the present invention provides a method and system for underground co-curing of carbonaceous liquids and carbonaceous gases, which aims to achieve efficient underground co-curing of carbonaceous liquids and carbonaceous gases from a wide range of sources.
To achieve the above object, according to an aspect of the present invention, there is provided a method for subsurface co-curing of a carbonaceous liquid and a carbonaceous gas, comprising the steps of:
based on actual geological conditions and preset reactant types and ratios, when the co-curing reaction of the carbon-containing liquid to be sealed and the carbon-containing gas is predicted, the conversion rate of the carbon-containing gas theory per hour and the curing rate of the carbon-containing liquid theory per hour are predicted, and then the injection modes of the carbon-containing liquid and the carbon-containing gas are determined as follows:
if the theoretical hourly conversion rate of the carbon-containing gas is more than 10%, simultaneously injecting the carbon-containing liquid and the carbon-containing gas, and detecting the actual hourly conversion rate of the carbon-containing gas in real time so as to dynamically adjust the injection rates of the carbon-containing liquid and the carbon-containing gas and realize underground co-solidification of the carbon-containing gas and the carbon-containing liquid;
if the conversion rate of the carbon-containing gas theory per hour is not more than 10%, firstly injecting the carbon-containing liquid, and according to the carbon-containing liquid theory per hour, predicting the solidification degree of the carbon-containing liquid to be more than 80%, injecting the carbon-containing gas, and detecting the actual conversion rate of the carbon-containing gas per hour in real time so as to dynamically adjust the injection rates of the carbon-containing liquid and the carbon-containing gas, thereby realizing the underground co-solidification of the carbon-containing gas and the carbon-containing liquid.
As a further preferred option, the actual hourly conversion of the carbonaceous gas is calculated by detecting the headspace gas concentration in real time.
As a further preference, if the theoretical hourly conversion of the carbonaceous gas is greater than the actual hourly conversion of the carbonaceous gas, then the carbonaceous liquid injection rate is maintained while the carbonaceous gas injection rate is reduced; otherwise, the carbon-containing gas injection rate is maintained unchanged while the carbon-containing liquid injection rate is increased.
As a further preferred, the theoretical hourly conversion of the carbonaceous gas and the theoretical hourly solidification of the carbonaceous liquid are predicted by a pre-built reaction model; the reaction model is constructed as follows:
under the simulation of different geological conditions and reactant ratios in a laboratory, the co-curing reaction of the carbon-containing liquid and the carbon-containing gas is carried out, so that the change of the carbon-containing liquid curing rate and the carbon-containing gas conversion rate along with time is obtained, and the corresponding carbon-containing gas theoretical hourly conversion rate and the carbon-containing liquid theoretical hourly curing rate are further obtained.
As a further preference, in carrying out laboratory simulations, the reactant ratios, i.e. the mass percentages of carbon-containing gas and carbon-containing liquid, range from 0 to 100%; the geological conditions include temperature and pressure, the temperature range is 20-100 ℃, and the pressure range is 1.6-20 MPa.
As a further preferable mode of injection of the carbon-containing gas, there is: the ventilation pipeline is extended below the liquid level of the underground carbon-containing liquid, and the underground is pressurized and filled with carbon-containing gas in a bubbling mode.
As a further preferred, the carbonaceous liquid is a liquid containing one or more carbon atoms produced by conversion of biomass or organic waste.
As a further preferred, the carbon-containing gas is at least one of gases containing one or more carbon atoms.
As a further preferred, the actual hourly conversion of the carbon-containing gas calculated based on the real-time detection of the headspace gas concentration is stopped when the actual hourly conversion of the carbon-containing gas is 0.
According to another aspect of the present invention there is provided a carbon-containing liquid and carbon-containing gas subsurface co-curing system comprising a processor for performing the above-described carbon-containing liquid and carbon-containing gas subsurface co-curing method.
In general, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the method judges the reactivity strength between the carbon-containing liquid to be sequestered and the carbon-containing gas to be sequestered based on the conversion rate of the carbon-containing gas per hour of a carbon-containing gas theory, thereby pertinently selecting the sequestered injection method, and dynamically adjusting the co-curing reaction process of the carbon-containing liquid and the carbon-containing gas based on the on-line detection of the actual conversion rate of the carbon-containing gas, so as to realize the efficient underground co-curing of the carbon-containing liquid and the carbon-containing gas with wide sources and realize the underground large-scale carbon fixation.
2. The invention dynamically adjusts the injection rate of the carbon-containing liquid and the carbon-containing gas based on the device for detecting the concentration of the headspace gas on line, thereby adjusting the co-curing reaction process and greatly improving the underground carbon fixation efficiency and the comprehensive energy efficiency.
3. The invention establishes a database of the solidifying rate and the conversion rate of the carbon-containing liquid obtained under different reaction conditions by simulating different underground reaction conditions in a laboratory based on the physical and chemical characteristics of the carbon-containing liquid and the carbon-containing gas, thereby constructing a multi-parameter mathematical reaction model for the underground co-solidifying and sealing of the carbon-containing liquid and the carbon-containing gas, and being convenient for the rapid use in practical application.
4. The invention fully utilizes the strong surface tension characteristic of the carbon-containing liquid, selects a bubbling mode when filling the carbon-containing gas, enables the carbon-containing liquid to seal the carbon-containing gas like a layer of compact oil film, increases the contact area between the carbon-containing liquid and the carbon-containing gas, and improves the underground co-curing efficiency.
5. The invention utilizes the synthesis reaction between the carbon-containing liquid and the carbon-containing gas and the polymerization reaction of the carbon-containing liquid, does not need additives, realizes high-efficiency large-scale flexible disposal of organic wastes by a one-step method, and realizes the cooperative sealing and storage of the carbon-containing gas.
Drawings
FIG. 1 is a flow chart of a method for underground co-curing of a carbon-containing liquid and a carbon-containing gas in accordance with an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The carbon-containing liquid prepared from the organic solid waste is rich in oxygen-containing active functional groups, and is easy to undergo self-polymerization reaction under high pressure condition to generate coke. Unsaturated active functional groups in the carbon-containing liquid can be subjected to bond breaking under high pressure, and free radicals formed by bond breaking and carbon-containing gas undergo addition reaction to generate carbon-containing liquid with larger molecular weight, so that polymerization reaction is further promoted. Therefore, the invention establishes a reaction model of the carbonaceous liquid and the carbonaceous gas by utilizing the reaction between the carbonaceous liquid and the carbonaceous gas based on the physicochemical characteristics of the carbonaceous liquid and the carbonaceous gas, specifically selects an underground co-curing method, and simultaneously dynamically adjusts the co-curing reaction process of the carbonaceous liquid and the carbonaceous gas based on an on-line monitoring device, and provides an underground co-curing method of the carbonaceous liquid and the carbonaceous gas, as shown in figure 1, which comprises the following steps:
s1, constructing a multi-parameter mathematical model, namely a reaction model, of the carbon-containing liquid solidification rate and the carbon-containing gas conversion rate which change along with time under different reactant ratios and different geological conditions.
Specifically, the reaction model uses different carbon-containing gases and carbon-containing liquids, and the mass percentage range of the carbon-containing gases and the carbon-containing liquids is 0-100%, namely, the mass ratio is (0-1): 1; the synthesis reaction of unsaturated active components in the carbon-containing liquid and the carbon-containing gas is mainly utilized, so that the reaction quantity of the carbon-containing gas cannot exceed that of the carbon-containing liquid, and the time-varying data of the self-polymerization solidification rate of the carbon-containing liquid are recorded. The co-curing reaction is carried out under the geological conditions simulated in a laboratory, wherein the geological conditions are specifically that the temperature range is 20-100 ℃, the temperature ranges from room temperature to more than 1km underground, the pressure range is 1.6-20 MPa, and the method is suitable for the pressure range of 100 m-1 km underground.
S2, based on actual geological conditions, reactant types and proportions, when the co-curing reaction of the carbon-containing liquid to be sealed and the carbon-containing gas is obtained according to a reaction model, the conversion rate of the carbon-containing gas theory per hour and the curing rate of the carbon-containing liquid theory per hour are determined, so that the reactivity strength between the carbon-containing liquid to be sealed and the carbon-containing gas to be sealed is judged, and the injection mode of the carbon-containing liquid and the carbon-containing gas is determined:
if the theoretical hourly conversion rate of the carbon-containing gas is more than 10%, the reactivity between the carbon-containing liquid to be sealed and the carbon-containing gas to be sealed is strong, and the carbon-containing gas and the carbon-containing liquid can be co-solidified within 12 hours; injecting the carbon-containing liquid and the carbon-containing gas at the same time, dynamically adjusting the injection rate of the carbon-containing liquid and the carbon-containing gas based on-line detection of the concentration of the headspace gas, and realizing underground co-solidification of the carbon-containing gas and the carbon-containing liquid;
if the theoretical hourly conversion rate of the carbon-containing gas is not more than 10%, the reactivity between the carbon-containing liquid to be blocked and the carbon-containing gas to be blocked is weaker; and injecting the carbon-containing liquid in advance, and injecting the carbon-containing gas after predicting the curing degree of the carbon-containing liquid to be more than 80% based on a reaction model, detecting the concentration of the headspace gas on line, and dynamically adjusting the injection rate of the carbon-containing liquid and the carbon-containing gas to realize the underground co-curing of the carbon-containing gas and the carbon-containing liquid. Specifically, for the carbonaceous liquid and the carbonaceous gas to be sealed with weaker reactivity, after the carbonaceous liquid is purposefully injected in advance and the solidification degree is more than 80%, the carbonaceous liquid forms a hard compact oil film which can be slightly loosened, so that the carbonaceous gas is conveniently injected into the oil film, and the carbonaceous gas is wrapped by the oil film similar to a protective layer so as to prevent the carbonaceous gas from escaping.
Further, the basis for dynamic adjustment is to compare the theoretical hourly conversion of the carbonaceous gas calculated from the reaction model with the actual hourly conversion of the carbonaceous gas calculated from the on-line detection of headspace gas: if the theoretical hourly conversion rate of the carbon-containing gas is greater than the actual hourly conversion rate of the carbon-containing gas, the fact that the actual carbon-containing gas is too much is indicated, and the injection rate of the carbon-containing gas needs to be reduced while the injection rate of the carbon-containing liquid is kept unchanged so as to increase the reaction rate between the carbon-containing gas and the carbon-containing liquid; otherwise, the injected carbonaceous liquid still has a margin, and the injection rate of the carbonaceous liquid needs to be increased while the injection rate of the carbonaceous gas is kept unchanged.
Further, the injection of the carbon-containing gas and the carbon-containing liquid is stopped when the actual hourly conversion rate of the carbon-containing gas calculated based on the online detection of the headspace gas concentration is 0.
Furthermore, the carbon-containing gas is injected by extending the ventilation pipeline below the liquid level of the underground carbon-containing liquid, pressurizing and injecting the carbon-containing gas into the underground in a bubbling mode, fully utilizing the strong surface tension characteristic of the carbon-containing liquid, selecting the bubbling mode when injecting the carbon-containing gas, sealing the carbon-containing liquid like a layer of compact oil film to store the carbon-containing gas, increasing the contact area of the carbon-containing liquid and the carbon-containing gas, and realizing the efficient underground co-solidification of the carbon-containing liquid and the carbon-containing gas with wide sources.
Specifically, the carbonaceous liquid is a liquid containing one or more carbon atoms produced by conversion of organic matter such as biomass, solid waste, medical waste, and the like. The carbon-containing gas is at least one of carbon dioxide, carbon monoxide, methane, and the like, which contains one or more carbon atoms.
The following are specific examples
Example 1
(a) Converting the straw into a carbon-containing liquid through fast pyrolysis at 500 ℃;
(b) Taking geological temperature 60 ℃ and pressure 10MPa at 1km underground as experimental test conditions for co-curing of carbon-containing liquid and carbon-containing gas, and obtaining methane with a conversion rate of 1.24% per hour according to a reaction model;
(c) Injecting a carbonaceous liquid into the closed pressurized reactor at a rate of 10 kg/h;
(d) When the solidification percentage of the carbon-containing liquid is predicted to be more than 80 percent by combining the reaction model, methane is injected at the speed of 10kg/h through pressurizing of an explosion tube;
(e) Stopping the injection of methane and the carbon-containing liquid when the actual methane hourly conversion rate calculated based on the online detection of the headspace gas concentration is 0;
(f) After 16 hours the carbonaceous liquid and methane were both fully cured.
Example 2
(a) Converting the plastic into a carbonaceous liquid by rapid pyrolysis at 550 ℃;
(b) Taking the geological temperature of 20 ℃ and the pressure of 20MPa at the underground normal temperature as the carbon-containing liquid and CO 2 CO-curing experimental test conditions, obtaining CO according to a reaction model 2 The conversion per hour was 15.36%;
(c) Simultaneously injecting a carbonaceous liquid and a carbonaceous gas into the closed pressurized reactor at a rate of 10 kg/h;
(d) Actual CO calculated based on-line detection of headspace gas concentration 2 Conversion per hourAt 0, CO injection is stopped 2 And a carbonaceous liquid;
(e) After 8h, the carbon-containing liquid and CO 2 Are all fully cured.
Example 3
(a) Converting the medical waste into a carbonaceous liquid by fast pyrolysis at 500 ℃;
(b) Taking geological temperature 48 ℃ and pressure 6MPa at 600m underground as test conditions for CO-curing experiments of the carbon-containing liquid and CO, and obtaining CO with a conversion rate of 6.59% per hour according to a reaction model;
(c) Injecting a carbonaceous liquid into the closed pressurized reactor at a rate of 10 kg/h;
(d) When the solidification percentage of the carbon-containing liquid is predicted to be more than 80 percent by combining the reaction model, CO is injected at the speed of 10kg/h through pressurizing of an explosion tube;
(e) Stopping injecting CO and the carbon-containing liquid when the actual CO hourly conversion rate obtained by calculating based on the online detection of the headspace gas concentration is 0;
(f) After 10 hours, the carbonaceous liquid and CO are completely solidified.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A method for co-curing a carbonaceous liquid and a carbonaceous gas underground comprising the steps of:
based on actual geological conditions and preset reactant types and ratios, when the co-curing reaction of the carbon-containing liquid to be sealed and the carbon-containing gas is predicted, the conversion rate of the carbon-containing gas theory per hour and the curing rate of the carbon-containing liquid theory per hour are predicted, and then the injection modes of the carbon-containing liquid and the carbon-containing gas are determined as follows:
if the theoretical hourly conversion rate of the carbon-containing gas is more than 10%, simultaneously injecting the carbon-containing liquid and the carbon-containing gas, and detecting the actual hourly conversion rate of the carbon-containing gas in real time so as to dynamically adjust the injection rates of the carbon-containing liquid and the carbon-containing gas and realize underground co-solidification of the carbon-containing gas and the carbon-containing liquid;
if the conversion rate of the carbon-containing gas theory per hour is not more than 10%, firstly injecting the carbon-containing liquid, and according to the carbon-containing liquid theory per hour, predicting the solidification degree of the carbon-containing liquid to be more than 80%, injecting the carbon-containing gas, and detecting the actual conversion rate of the carbon-containing gas per hour in real time so as to dynamically adjust the injection rates of the carbon-containing liquid and the carbon-containing gas, thereby realizing the underground co-solidification of the carbon-containing gas and the carbon-containing liquid.
2. The method for underground co-curing of a carbonaceous liquid and a carbonaceous gas according to claim 1, wherein the actual hourly conversion of the carbonaceous gas is calculated by detecting the headspace gas concentration in real time.
3. The method of underground co-curing a carbonaceous liquid and a carbonaceous gas according to claim 1, wherein if the theoretical hourly conversion of the carbonaceous gas is greater than the actual hourly conversion of the carbonaceous gas, then maintaining the carbonaceous liquid injection rate unchanged while reducing the carbonaceous gas injection rate; otherwise, the carbon-containing gas injection rate is maintained unchanged while the carbon-containing liquid injection rate is increased.
4. The method for underground co-curing of a carbon-containing liquid and a carbon-containing gas according to claim 1, wherein the theoretical hourly conversion rate of the carbon-containing gas and the theoretical hourly curing rate of the carbon-containing liquid are predicted by a pre-constructed reaction model; the reaction model is constructed as follows:
under the simulation of different geological conditions and reactant ratios in a laboratory, the co-curing reaction of the carbon-containing liquid and the carbon-containing gas is carried out, so that the change of the carbon-containing liquid curing rate and the carbon-containing gas conversion rate along with time is obtained, and the corresponding carbon-containing gas theoretical hourly conversion rate and the carbon-containing liquid theoretical hourly curing rate are further obtained.
5. The method for underground co-curing of a carbon-containing liquid and a carbon-containing gas according to claim 4, wherein the reactant ratio, i.e. the mass percentage of the carbon-containing gas to the carbon-containing liquid, is in the range of 0-100% when laboratory simulation is performed; the geological conditions comprise temperature and pressure, the temperature range is 20 ℃ to 100 ℃, and the pressure range is 1.6MPa to 20MPa.
6. The method for underground co-curing of a carbon-containing liquid and a carbon-containing gas according to claim 1, wherein the carbon-containing gas is injected in the following manner: the ventilation pipeline is extended below the liquid level of the underground carbon-containing liquid, and the underground is pressurized and filled with carbon-containing gas in a bubbling mode.
7. The method of underground co-solidification of a carbon-containing liquid and a carbon-containing gas of claim 1, wherein the carbon-containing liquid is a liquid containing one or more carbon atoms produced by conversion of biomass or organic waste.
8. The method of subsurface co-curing a carbon-containing liquid and a carbon-containing gas according to claim 1, wherein the carbon-containing gas is at least one of gases containing one or more carbon atoms.
9. The method for underground co-curing of a carbonaceous liquid and a carbonaceous gas according to any one of claims 1 to 8, wherein the actual hourly conversion of the carbonaceous gas calculated based on the real-time detection of the headspace gas concentration is stopped when the actual hourly conversion of the carbonaceous gas is 0.
10. A carbon-containing liquid and carbon-containing gas subsurface co-curing system comprising a processor for performing the carbon-containing liquid and carbon-containing gas subsurface co-curing method according to any one of claims 1-9.
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