KR102026012B1 - Designing method of carbon dioxide capture and storage process using gas separation membrane - Google Patents

Abstract

Carbon dioxide capture process design method according to the invention, the target setting step of setting the target purity and target capture rate; Using the separation performance data of the membrane module for processing the target purity, the target capture rate, and the injected gas to discharge the permeate flow and the pass-through flow, the singular and the membrane module which is the number of the membrane modules constituting the permeate flow chain A calculation step of calculating the treated water which is the number of the membrane modules constituting the passage part of the flow chain; And placing the membrane modules of the same number as the calculated stage in the permeate flow chain, and passing through the membrane modules of the same number as the calculated treated water so that the passage flow chain receives the injection gas and discharges the discard stream. By placing in a secondary flow chain, it forms a carbon dioxide capture process comprising the permeate flow chain that receives the injection gas to discharge the final carbon dioxide discharge stream and the passage flow chain that receives the injection gas to discharge the waste stream It includes; arrangement step.

Description

Carbon dioxide capture process design method using membrane {DESIGNING METHOD OF CARBON DIOXIDE CAPTURE AND STORAGE PROCESS USING GAS SEPARATION MEMBRANE}

The present invention relates to a method of designing a carbon dioxide capture process using a separator.

In a power plant, energy is obtained through combustion reactions and then combustion gases are emitted. Combustion gases contain large amounts of carbon dioxide, which can act as greenhouse gases that have a significant impact on global warming. Therefore, a technique for removing carbon dioxide from exhaust gas as much as possible is required.

The method of capturing and removing carbon dioxide in a power plant using a combustion reaction includes pre-combustion techniques to remove carbon dioxide from the fuel before the combustion reaction occurs, and combustion to remove carbon dioxide from the combustion gas after the combustion reaction occurs. It can be divided into post-combustion technology. Post-combustion technologies include chemical absorption, adsorption, and membrane technology.

Among them, the membrane technology is in the limelight as a suitable technology for constructing a relatively eco-friendly power generation facility because continuous use of chemicals is not required. However, while much research related to membranes is focused on the development of the material and module structure of the membrane which can have better separation performance, the research on the composition and application of the carbon dioxide separation process that can be formed by disposing the membrane is relatively relatively. Lack.

The present invention has been made to solve the above problems, to provide a method for designing a carbon dioxide capture process that can achieve the target concentration or purity.

Carbon dioxide capture process design method according to an embodiment of the present invention, the target setting step of setting the target purity and target capture rate; Using the separation performance data of the membrane module for processing the target purity, the target capture rate, and the injected gas to discharge the permeate flow and the pass-through flow, the singular and the membrane module which is the number of the membrane modules constituting the permeate flow chain A calculation step of calculating the treated water which is the number of the membrane modules constituting the passage part of the flow chain; And placing the membrane modules of the same number as the calculated stage in the permeate flow chain, and passing through the membrane modules of the same number as the calculated treated water so that the passage flow chain receives the injection gas and discharges the discard stream. By placing in a secondary flow chain, it forms a carbon dioxide capture process comprising the permeate flow chain that receives the injection gas to discharge the final carbon dioxide discharge stream and the passage flow chain that receives the injection gas to discharge the waste stream It includes; arrangement step.

Accordingly, carbon dioxide may be collected at a target purity and target capture rate using a designed carbon dioxide capture process.

1 is a flow chart showing a method for designing a carbon dioxide capture process according to an embodiment of the present invention.
2 is a carbon dioxide capture process designed using a carbon dioxide capture process design method according to an embodiment of the present invention.
3 is a graph of permeate concentration of the membrane module used in the carbon dioxide capture process according to an embodiment of the present invention.
Figure 4 is a graph of the passage concentration of the membrane module used in the carbon dioxide capture process according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiments of the present invention, if it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a flow chart showing a method for designing a carbon dioxide collection process (1) according to an embodiment of the present invention. 2 is a carbon dioxide capture process (1) designed using a carbon dioxide capture process (1) design method according to an embodiment of the present invention.

Referring to the drawings, a method of designing a carbon dioxide capture process (1) according to an embodiment of the present invention includes a goal setting step, a calculation step, and a placement step. In addition, it may further include the other equipment arrangement step and the deletion step following the deployment step.

The membrane module used in the carbon dioxide collection process (1) of the present invention is formed by combining a separator material for selectively transmitting carbon dioxide with a pressure vessel, a support, or the like. The material of the separator is a material that selectively permeates carbon dioxide, a polymer separator such as PDMS (Poly Dimethyl Siloxane), PS (Polysulfone), PI (Polyimide), zeolite separator and the like, two or more of them are combined. May be used but is not limited thereto.

The injection gas introduced into the membrane module is a gas containing carbon dioxide. The separation target mixture forming the separation target stream 100 used as the injection gas is at least a part of the gas discharged after burning the fuel including fossil fuel in the power plant. Generally, 10% to 20% of the mixture to be separated is carbon dioxide, and the mixture to be separated contains less than 10% oxygen and 70% or more nitrogen.

The membrane module separates and discharges the injection gas into the permeate flow and the pass flow. The permeate stream is the gas enriched in the carbon dioxide of the injection gas, and the pass-through stream is the residual gas remaining after the permeate stream is made.

Goal setting step

The goal setting step is to set a target purity and target capture rate of the overall carbon dioxide capture process (1). Purity means the carbon dioxide concentration of the final captured carbon dioxide stream 113 that is finally collected. The collection rate refers to the ratio of the amount of carbon dioxide finally collected to the amount of carbon dioxide contained in the separation target stream 100 injected by the process of the present invention as a percentage.

Target purity and target capture rate are set to the purity and capture rate required by the operator. The target purity is preferably in the range of 80% to 99.9%, and the target collection rate is preferably in the range of 60% to 99.9%.

Calculation step

The calculating step is a step of calculating the number of stages and the treated water used in the arrangement of the membrane module. For this calculation, the calculation step uses the target purity, target collection rate and separation performance data of the membrane module set in the previous step.

The calculating step may include a target emission concentration calculation step of calculating a target emission concentration based on the target purity and target capture rate. This is because, in addition to the purity of the final captured carbon dioxide stream 113, the carbon dioxide concentration of the finally discarded stream 103 is also a discharge gas of the process, and therefore must be controllable. The target emission concentration C _W refers to the concentration of carbon dioxide contained in the aeration stream 103 finally discharged through the process.

The target capture rate may be expressed as in Equation 1 below.

Where Q _P is the flow rate of the final capture carbon dioxide stream 113, C _P is the target purity with volume% unit, R is the target capture rate with% unit, Q _F is the flow rate of injection gas, and C _F is the volume% unit. Is the carbon dioxide concentration of the injection gas. Since the target purity, target capture rate, flow rate of the injection gas, and carbon dioxide concentration of the injection gas are given, the flow rate of the final trapped carbon dioxide stream 113 is determined from Equation 1 above.

The total mass balance of the carbon dioxide capture process (1) of the present invention can be expressed by the following equations (2) and (3).

Here Q _W means the flow rate of the abandon flow (103). Using Equations 1 to 3, the target emission concentration having a volume% unit is expressed by Equation 4 below.

The calculating step may include a singular and treated water calculating step of calculating the singular and the treated water based on the target discharge concentration calculated using Equation 4. This can be further divided into a singular calculation step and a treatment water calculation step.

Here, the singular means the number of separation membrane modules 201, 202 and 203 constituting the permeate flow chain, and the treated water means the number of separation membrane modules 201, 221 and 231 constituting the passage flow chain of the separation membrane module. Means. The permeate flow chain refers to a chain formed by the membrane modules 201, 202, and 203 using the permeate flow of the previous stage in which carbon dioxide is concentrated and discharged as a gas to be injected. The passage flow chain means a chain formed by the membrane modules 201, 221, and 231 that use the remaining gas of the previous turn remaining after the carbon dioxide is separated as a gas to be injected.

3 is a graph of permeate concentration of the membrane module used in the carbon dioxide capture process (1) according to an embodiment of the present invention. The horizontal axis (x-axis) of the graph represents the carbon dioxide concentration of the injection gas, and the vertical axis (y-axis) of the graph represents the carbon dioxide concentration of the permeate flow.

The stage calculation step determines the stage of the permeate flow chain. The number of stages is determined based on the permeate concentration graph and the target purity of the membrane module.

Referring to the drawings, the carbon dioxide concentration of the injection gas injected into the membrane module and the permeate carbon dioxide concentration of the membrane module have a constant relationship to form a curve as shown.

There are a plurality of membrane modules, and the permeate flow chain may be formed to use the permeate flow of the membrane module located at the front end of the adjacent membrane modules as the injection gas of the membrane module located at the rear end. When the permeate flow obtained after passing through the N membrane modules can achieve the target purity, the minimum possible natural number N is the number of stages required in the carbon dioxide capture process 1 according to one embodiment of the present invention.

Accordingly, the singular calculation step may determine whether the carbon dioxide stream of the desired target purity can be discharged to the permeate stream through a total of several membrane modules from the graph of FIG. 3.

Since the carbon dioxide concentration of the injection gas injected into the first stage will be given, a vertical line 831 is drawn from the point corresponding to the concentration on the x-axis of the graph. The y-axis value at the point where the vertical line 831 and the graph 81 meet is the carbon dioxide concentration of the permeate stream 111 discharged from the first stage membrane module 201 located at the first stage. Since the carbon dioxide concentration of the permeate stream 111 of the first stage membrane module 201 did not reach the target purity, the permeate stream 111 should pass further through the membrane module.

Therefore, this concentration value becomes the concentration of the injection gas of the two stage membrane module 202 located in the next stage of the one stage membrane module 201. In order to see the concentration change when the permeate stream 111 of the first stage membrane module 201 passes through the second stage membrane module 202, a horizontal line 832 is drawn from the vertical line 831, and the horizontal line 832. ) Finds a point where the line meets y = x straight line 82, and draws a vertical line 833 again from the point to find the point where it meets the graph (81). The y-axis value at that point becomes the carbon dioxide concentration of the permeate stream 112 of the two-stage membrane module 202.

Since the carbon dioxide concentration of the permeate stream 112 of the two-stage membrane module 202 did not reach the target purity, the permeate stream 112 of the two-stage membrane module 202 must pass further through the membrane module. Therefore, the horizontal line 834 and the vertical line 835 are drawn in the same manner, and the point where the graph 81 and the vertical line 835 meet is found. The y-axis value at this point is the carbon dioxide concentration of the permeate flow of the three-stage membrane module 203 receiving the permeate stream 112 of the two-stage membrane module 202 as the injection gas.

Since the carbon dioxide concentration of the permeate flow of the three-stage membrane module 203 in the figure is higher than the target purity, the number of stages of the membrane module used in the carbon dioxide capture process 1 according to the embodiment of the present invention is three. That is, the separation target flow 100 is injected into the injection gas of the first stage membrane module 201, and the permeate stream 111 of the first stage membrane module 201 is injected into the injection gas of the two stage membrane module 202. The permeate stream 112 of the two-stage membrane module 202 is injected into the injection gas of the three-stage membrane module 203, so that the permeate flow of the three-stage membrane module 203 is finally collected carbon dioxide flow 113 Can form permeate flow chains.

Figure 4 is a graph of the passage concentration of the membrane module used in the carbon dioxide capture process (1) according to an embodiment of the present invention. The horizontal axis (x-axis) of the graph represents the carbon dioxide concentration of the injection gas, and the vertical axis (y-axis) of the graph represents the carbon dioxide concentration of the passage flow.

The treatment water calculation step determines the treatment water of the passage flow chain. The treated water is determined based on the passage concentration concentration graph of the membrane module and the target discharge concentration calculated in the target discharge concentration calculation step.

Referring to the drawings, the carbon dioxide concentration of the injection gas injected into the separator module and the passage carbon dioxide concentration of the separator module have a predetermined relationship to form a curve as shown.

There may be a plurality of membrane modules, and the passage flow chain may be formed to use the passage flow of the separator module located in the previous turn among adjacent membrane modules as the injection gas of the separator module located in the next turn. When the passage flow obtained after passing through the M membrane modules can be below the target emission concentration, the minimum value of the natural water M possible becomes the treated water required in the carbon dioxide capture process 1 according to the embodiment of the present invention. .

Therefore, the stage calculation step determines whether the carbon dioxide stream of the desired target purity can be discharged to the final trapped carbon dioxide stream 113 which is the permeate flow of the membrane module of the last stage only after passing through a total of several membrane modules from the graph of FIG. 3. Can be.

Since the carbon dioxide concentration of the injection gas injected into the first stage will be given, a vertical line 931 is drawn from the point corresponding to the concentration on the x-axis of the graph. The passage part through which the y-axis value at the point where the vertical line 931 and the graph 91 meet is discharged from the first stage membrane module 201 (or one membrane module) located at the first stage and the first stage. The carbon dioxide concentration of the stream 101. Since the carbon dioxide concentration of the passage flow 101 of the first stage membrane module 201 exceeds the target discharge concentration, the passage flow 101 must pass further through the membrane module.

Therefore, this concentration value becomes the concentration of the injection gas of the second membrane module 221 located at the next turn of the first stage membrane module 201. A horizontal line 932 is drawn from the vertical line 931 in order to examine the concentration change when the flow through the first stage membrane module 201 passes through the second membrane module 221. Find the point where the line y = x meets the straight line 92, and draw a vertical line 933 from the point again to find the point where it meets the graph 91. The y-axis value at that point becomes the carbon dioxide concentration of the passage flow 102 of the membrane module 221 twice.

Since the carbon dioxide concentration of the passage stream 102 of the double membrane module 221 exceeds the target discharge concentration, the passage stream 102 of the double membrane module 221 must pass further through the membrane module. Accordingly, the horizontal line 934 and the vertical line 935 are drawn in the same manner, and the point where the graph 91 and the vertical line 935 meet is found. The y-axis value at this point is the carbon dioxide concentration of the permeate stream of the third separator module 231 receiving the passage flow 102 of the two separator modules 221 as the injection gas.

In the drawing, since the carbon dioxide concentration of the flow through the separator module 231 is less than or equal to the target discharge concentration, the treated water of the membrane module used in the carbon dioxide collection process 1 according to the exemplary embodiment of the present invention is three. That is, the separation target flow 100 is injected into the injection gas of the first stage membrane module 201 and the passage flow 101 of the first stage membrane module 201 is injected into the injection gas of the membrane module 221 twice. And, the passage flow 102 of the two separation membrane module 221 is injected into the injection gas of the three separation membrane module 231, and finally the passage flow of the three separation membrane module 231 is the final collected carbon dioxide flow ( 113) to form a passage flow chain.

Deployment stage

The arranging step is a step of forming a permeate flow chain, a passage flow chain, and determining a position at which the membrane module is disposed in each chain, and determining a position at which the passage flow and the permeate flow of each membrane module are circulated or discharged. Therefore, in the batching step, the membrane modules of the same number as the calculated number of stages are placed in the permeate flow chain, and the membrane flow modules of the same number as the treated water calculated to discharge the waste stream 103 by receiving the injection gas through the passage flow chain. Are placed in the passage flow chain. Thus, in the batching step, one carbon dioxide capture process (1) includes a permeate flow chain that receives the injection gas and discharges the final carbon dioxide discharge stream and a passage flow chain that receives the injection gas and discharges the waste stream 103. To form. Thus, the disposing step includes a permeate flow chain generating step of forming permeate flow chains and a passage part flow chain generating step of forming a permeate flow chain.

The permeate flow chain generation step is a step of constructing the permeate flow chain by injecting the permeate flow of the membrane module located at the front of the adjacent membrane modules into the membrane module located at the rear end. That is, when the number of stages is N, the first stage membrane module 201 to the N stage membrane module are connected to each other so that the permeate flow in the front end is used as the injection gas in the rear stage to form permeate flow chain.

The passage flow chain generation step is a step of constructing the post-pass flow chain by injecting the passage flow of the membrane module located in the previous turn among the membrane modules adjacent to each other to the membrane module located in the next turn. That is, when the treated water is M, the first stage membrane module 201 to the M membrane module are connected to each other so as to use the passage flow of the previous car as the injection gas of the next car to form a passage flow chain.

Among the membrane modules arranged in the arrangement step, the first membrane module 201 and the one membrane module are the same membrane module. That is, the permeate flow chain and the passage flow chain extend from the first stage membrane module 201. Therefore, the total number of membrane modules required to form a carbon dioxide capture process 1 having a single stage N and a treated number M becomes N + M-1.

The placement step may include a reuse location determination step. Reuse position determination step is to determine the position to reuse the passage flow or permeate flow of the membrane module included in each chain. Specifically, the reuse position determining step sets the permeate flow reuse position, which is a position at which the permeate flow of the membrane modules included in the permeate flow chain is injected into the permeate flow chain. In addition, the reuse position determining step designes one carbon dioxide capture process 1 by setting the pass-through reuse position, which is a position at which the pass-through flow of the membrane modules included in the permeate flow chain is injected into the permeate flow chain.

Specifically, the membrane modules included in the passage flow chain are connected to each other through the passage flow. Therefore, except for the one-stage membrane module 201, the permeate stream 104, 105 of each membrane module 221, 231 constituting the passage flow chain is required to be discharged or introduced. The permeate streams 104 and 105 of each separator module constituting the passage flow chain may be injected into the first stage membrane module 201 or the two stage membrane module 202. Therefore, since the number of the membrane modules 221 and 231 constituting the passage flow chain except for the one-stage membrane module 201 is M-1, the permeate portion for reusing the permeate flow 104 and 105 of the passage flow chain is M-1. There are a total of 2 ^(M-1) flow reuse locations.

In addition, the membrane modules included in the permeate flow chain are connected to each other through the permeate flow. Therefore, except for the one-stage membrane module 201, a position where the passage flow 114, 115 of each membrane module 202, 203 constituting the permeate flow chain is discharged or introduced is required. Pass-through flows 114 and 115 of each membrane module constituting the permeate flow chain may be injected into the membrane module located in front of the separator module. For example, the flow through the n-stage membrane module may be used as the injection gas of any one of the one-stage membrane module 201 to the n-1 stage membrane module 201. Accordingly, since the number of the membrane modules 201, 202, and 203 constituting the permeate flow chain except for the first stage membrane module 201 is N-1, the passage flow reuse position for reusing the flow through the permeate flow chain is There are a total of (N-1)!

In total, there are a total of 2 ^(M-1) (N-1)! Candidates for the permeate flow reuse position and the permeate flow reuse position. Any one of these array candidates is selected to determine one carbon dioxide collection step (1).

Judgment

Carbon dioxide capture process (1) design method of the present invention may further comprise a determination step. The determination step is a step of determining whether one carbon dioxide capture process 1 designed in the batch step satisfies the target purity and target capture rate.

The determination step may be followed by a deletion step if one carbon dioxide capture process 1 does not meet the target purity and target capture rate. The deletion step is to delete one carbon dioxide capture process (1) that has been determined, and to return to the reuse position determination step of the batch step. That is, since the carbon dioxide capture process (1) that does not meet the design conditions of the carbon dioxide capture process (1) of the present invention,

The re-use position determination step included in the batch step includes selecting another one of the array candidate candidates when the carbon dioxide collecting step 1 is deleted by the deleting step and then returning to the batch step. 1) Design.

In the determining step, when one carbon dioxide capture process 1 satisfies the target purity and target capture rate, the corresponding carbon dioxide capture process 1 may be selected. The judging phase then goes to the other plant placement phase when these conditions are met.

Other equipment layout stage

The other facility arranging step is a step of arranging various other facilities in the one carbon dioxide collection process 1 designed in the arranging step.

The separation target flow 100 may include sulfur oxides, nitrogen compounds, moisture, dust, etc., in addition to carbon dioxide, oxygen, and nitrogen, and these other components may cause deterioration of the membrane installation, and thus may need to be removed in some cases. There is.

In addition to the membrane module, the arrangement of vacuum pumps, compressors 31, 32, 33, and heat exchangers 41, 42, 43, 44, 45 for forming a flow is required. In addition, the expander may be disposed in the carbon dioxide capture process (1) for improved energy efficiency and stable operation of the process.

Therefore, in the other equipment arrangement step, the vacuum pump, the compressors 31, 32, 33 and the heat exchangers 41, 42, 43, 44, 45 are disposed at appropriate positions in the carbon dioxide capture process 1 designed through the preceding steps. If necessary, at least one of the desulfurization facility 52, the dehydration facility 51, the denitrification facility, or the dust removal facility 61 may be disposed. An expander can also be placed in the carbon dioxide capture process (1).

In addition, in the other equipment arrangement step, it is possible to determine the location and type of equipment to be arranged by determining the composition of the mixture included in the separation target flow 100, the investment cost of each equipment, the operating cost, the material properties of the membrane.

Referring to FIG. 2 again, the carbon dioxide capture process 1 and its components designed by the method of designing the carbon dioxide capture process 1 according to the embodiment of the present invention will be described.

Referring to the drawings, the separation target flow 100 is injected into the first stage membrane module 201. That is, the separation target flow 100 becomes the injection gas of the first stage membrane module 201. The first stage membrane module 201 injects the permeate flow 111 into the two stage membrane module 202, and the passage portion 101 is injected into the two membrane modules 221.

The permeate stream 112 of the two-stage membrane module 202 is injected into the three-stage membrane module 203, and the passage flow 114 of the two-stage membrane module 202 is injected again into the one-stage membrane module 201. do.

The permeate flow of the three stage separator module 203 becomes the final trapped carbon dioxide stream 113. The passage flow 115 of the three-stage membrane module 203 is injected back into the one-stage membrane module 201.

The passage flow 102 of the double membrane module 221 is injected into the membrane module 231 three times, and the permeate stream 104 of the double membrane module 221 is injected into the two-stage membrane module 202. .

The passage flow of the three separator module 231 becomes the final discard flow 103. The permeate flow 105 of the triple membrane module 231 is injected into the first stage membrane module 201.

Through each of these chains, a final captured carbon dioxide stream 113 and a waste stream 103 are produced. The final captured carbon dioxide stream 113 satisfies the target purity, and the waste stream 103 satisfies the target emission concentration. Therefore, the entire process meets the target capture rate.

The separation object stream 100 is injected into the separation membrane module and discharged into the permeate flow and the passage flow. Therefore, the compressors 31, 32, and 33 may be arranged to pressurize the injection gas to the membrane module. Blowers or fans may be used as the compressors 31, 32, 33. Vacuum pumps can also be arranged to make this flow. The vacuum pump may be placed in the permeate flow of the membrane module.

An expander may also be installed to recover the compressed energy of the abandon stream 103. The expander may recover the compressed energy from the abandon stream 103, thereby reducing the energy consumption consumed in the process.

The heat exchangers 41, 42, 43, 44, and 45 remove the compressed heat generated during the pressurization process. Therefore, it is installed after the vacuum pump or after the compressor (31, 32, 33), and serves to cool the fluid that has been heated after pressurization.

The dehydration facility 51 discharges the water removed from the gas through the water discharge flow 121, and the dust removal facility 61 discharges the dust removed from the gas through the dust discharge flow 122. The desulfurization plant 52 also discharges the sulfur oxides removed from the gas through a sulfur oxide stream 123.

In the above description, it is described that all the components constituting the embodiments of the present invention are combined or operated in one, but the present invention is not necessarily limited to these embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be inherent unless specifically stated otherwise, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms used generally, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1: CO2 capture process 31, 32, 33: compressor
41, 42, 43, 44, 45: heat exchanger 51: dehydration equipment
52: desulfurization equipment 61: dust removal equipment
100: flow to be separated 101, 102, 114, 115: flow through
103: discard flow 104, 105, 110, 111: permeate flow
113: final capture carbon dioxide stream 121: water discharge stream
122: dust discharge flow 123: sulfur oxide flow
201: 1st stage membrane module 202: 2nd stage membrane module
203: three-stage membrane module 221: two-membrane module
231: 3 membrane module

Claims (8)

A goal setting step of setting a target purity and a target capture rate;
Using the separation performance data of the membrane module for processing the target purity, the target capture rate, and the injected gas to discharge the permeate flow and the pass-through flow, the singular and the membrane module which is the number of the membrane modules constituting the permeate flow chain A calculation step of calculating the treated water which is the number of the membrane modules constituting the passage part of the flow chain; And
The membrane modules of the same number as the calculated number of stages are placed in the permeate flow chain, and the membrane flow modules pass through the same number of the membrane modules as the calculated water so as to discharge the waste stream by receiving the injection gas Forming a carbon dioxide capture process comprising the permeate flow chain that receives the injection gas and discharges the final carbon dioxide discharge stream and the passage flow chain that receives the injection gas and discharges the aeration stream; A batch step; comprising a carbon dioxide capture process design method. The method of claim 1,
The calculating step,
A target emission concentration calculating step of calculating a target emission concentration based on the target purity and the target collection rate; And
And calculating the number of stages and calculating the number of treatments based on the calculated target discharge concentration.
CO2 capture process design method. The method of claim 2,
The target emission concentration calculation step,
A carbon dioxide capture process design method for calculating a target emission concentration having a volume percent unit from the following formula.

(C _W is the target emission concentration with volume%, C _P is the target purity with volume%, R is the target capture rate with% unit, C _F is the carbon dioxide concentration of the injection gas with volume% unit) The method of claim 1,
The arrangement step,
A permeate flow chain generation step of constructing the permeate flow chain by injecting the permeate flow of the membrane module located at the front of the membrane modules adjacent to each other to the membrane module at the rear end; And
A carbon dioxide capture process design comprising a passage flow chain generating step of forming the passage flow chain by injecting the passage flow of the membrane module located in the previous turn among the membrane modules adjacent to each other into the separator module located in the next turn. Way. The method of claim 2,
The singular and treated water calculation step,
A singular calculation step of determining the singular number based on a graph of permeate concentration of the membrane module and the target purity; And
And a treatment water calculation step of determining the treatment water based on a graph of the passage concentration of the membrane module and the target discharge concentration. The method of claim 1,
The arrangement step,
Set the permeate flow reuse position, which is a position for injecting the permeate flow of the membrane modules included in the permeate flow chain into the permeate flow chain, and transmit the permeate flow of the membrane modules included in the permeate flow chain to the permeate flow chain. And a reuse location determination step of designing one carbon dioxide capture process by setting a pass flow reuse location that is an injection location. The method of claim 6,
When the one carbon dioxide capture process designed in the batch step does not satisfy the target purity and the target capture rate, the method further includes deleting the one carbon dioxide capture process and returning to the reuse position determining step. ,
Wherein the batching step designes another carbon dioxide capturing process when it returns to the batching step after the one carbon dioxide capturing process is deleted. The method of claim 6,
When the one carbon dioxide capture process designed in the batching step satisfies the target purity and the target capture rate,
A vacuum pump, a compressor, and a heat exchanger used in the one carbon dioxide capture process are disposed in the one carbon dioxide capture process, and at least one of a desulfurization facility, a dehydration facility, a denitrification facility, or a dust removal facility is disposed in the one carbon dioxide capture process. Further comprising a different plant arrangement step.

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