Membrane method carbon capture system

Abstract

The utility model relates to the technical field of carbon dioxide capture, and particularly discloses a membrane method carbon capture system. Comprising a plurality of groups of partition membrane components, a permeation side pipeline connected with the plurality of groups of partition membrane components respectively, a retentate side pipeline connected with the plurality of groups of partition membrane components respectively, an inlet detection component for detecting gas parameters of flue gas, a detection component I, a detection component II and a flow regulating valve arranged on the inlet side of each group of partition membrane components, and the control unit is respectively connected with the inlet detection assembly, the detection assembly I, the detection assembly II and the flow regulating valve. According to the utility model, the stable operation of each subarea membrane component can be effectively realized, the detection of each subarea membrane component is realized through the matching of each pipeline and the detection component, the performance parameters of each subarea membrane component can be effectively monitored, and the flow in each subarea membrane component can be automatically controlled according to the detection result; and meanwhile, the investment cost of detection equipment can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to carbon dioxide capture technology field more particularly, relate to a membrane method carbon capture system. BACKGROUND

[0002] At present, the carbon dioxide produced by the fossil fuel combustion of power plant is one of the main sources of carbon emission in China, with the double carbon target and the continuous growth of energy demand, capturing carbon dioxide from flue gas after combustion has become one of the important ways of carbon emission reduction. Carbon dioxide capture methods include physical adsorption, chemical absorption and membrane separation, among which membrane separation method is a method based on the difference of permeation rate of each component gas, which has the characteristics of less pollution, simple operation and small equipment volume, has great application potential, and is gradually applied in flue gas carbon capture.

[0003] In a large-scale membrane carbon capture system, the membrane assembly composed of many branch membrane elements captures and separates carbon dioxide in flue gas. During the operation of the membrane assembly, on the one hand, the total number of membrane assemblies or the inlet flow rate under different working conditions needs to be adjusted to adapt to the change of working conditions, and on the other hand, the parameters of the membrane assembly, especially the gas parameters of the inlet, the permeation side and the residual side, need to be detected to ensure the stability and reliability of the operation.

[0004] How to detect the performance of a large number of membrane assemblies in the membrane carbon capture process is an important problem faced by the industrialization of membrane carbon capture. Utility model content

[0005] The technical problem to be solved by the utility model is to provide a membrane carbon capture system which can effectively realize the stable operation of each partition membrane assembly, realize the detection of each partition membrane assembly through the cooperation of each pipeline and the detection assembly, effectively monitor the performance parameters of the partition membrane assembly, automatically control the flow in each partition membrane assembly according to the detection result, and effectively reduce the investment cost of the detection equipment.

[0006] The solution adopted by the utility model to solve the technical problem is:

[0007] A membrane carbon capture system, comprising a plurality of subzone membrane assemblies connected to a flue gas pipeline, a permeate side pipeline connected to the plurality of subzone membrane assemblies and used for collecting and discharging carbon dioxide rich gas, a retentate side pipeline connected to the plurality of subzone membrane assemblies and used for collecting and discharging carbon dioxide lean gas, an inlet detection assembly for detecting gas parameters of flue gas entering each subzone membrane assembly and arranged in one-to-one correspondence with the subzone membrane assemblies, a detection assembly one for detecting gas parameters of carbon dioxide rich gas discharged by each subzone membrane assembly and arranged in one-to-one correspondence with the subzone membrane assemblies, a detection assembly two for detecting gas parameters of carbon dioxide lean gas discharged by each subzone membrane assembly and arranged in one-to-one correspondence with the subzone membrane assemblies, a flow regulating valve arranged at an inlet side of each subzone membrane assembly, and a control unit connected to the inlet detection assembly, the detection assembly one, the detection assembly two, and the flow regulating valve, respectively.

[0008] In some possible embodiments, a plurality of gas inlet pipes connected to the subzone membrane assemblies are arranged on the flue gas pipeline.

[0009] In some possible embodiments, the flow regulating valve is arranged on the gas inlet pipe.

[0010] In some possible embodiments, the connection point of the inlet detection assembly to the flue gas pipeline is arranged between the subzone membrane assembly and the flow regulating valve.

[0011] In some possible embodiments, the subzone membrane assembly comprises a plurality of membrane elements connected to the gas inlet pipe, the permeate side pipeline, and the retentate side pipeline, respectively.

[0012] In some possible embodiments, an output pipe one for discharging carbon dioxide rich gas and connected to the permeate side pipeline, an output pipe two for discharging carbon dioxide lean gas and connected to the retentate side pipeline, and an input pipe connected to the gas inlet pipe are arranged on the membrane element.

[0013] In some possible embodiments, a control valve one is arranged on the output pipe one, a control valve two is arranged on the output pipe two, and an inlet control valve is arranged on the input pipe.

[0014] In some possible embodiments, a collection pipe one connected to the detection assembly one and arranged in one-to-one correspondence with the subzone membrane assemblies is arranged on the permeate side pipeline, and the collection pipe one is connected to the output pipe one in each subzone membrane assembly; a permeate side valve is arranged on the collection pipe one.

[0015] In some possible embodiments, a collection pipe two connected to the detection assembly two and arranged in one-to-one correspondence with the subzone membrane assemblies is arranged on the retentate side pipeline, and the collection pipe two is connected to the output pipe two in each subzone membrane assembly; a retentate side valve is arranged on the collection pipe two.

[0016] In some possible embodiments, a flow meter connected with the control unit is further arranged on the air inlet pipe.

[0017] The inlet detection assembly, the detection assembly one and the detection assembly two are same; the gas analyzer for detecting the carbon dioxide concentration and the oxygen concentration, the hygrometer for detecting H2O in the gas, the pressure gauge for detecting the air pressure and the thermometer for detecting the temperature are included.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The flow regulating valve and the flow meter arranged on the air inlet pipe can effectively adjust the flow of the flue gas into the partition membrane assembly, so that the partition membrane assembly can move smoothly; the control valve one and the control valve two can effectively control the working state of each group of partition membrane assemblies.

[0020] The inlet detection assembly is arranged to detect the gas parameters of the flue gas entering the partition membrane assembly; the detection assembly one is arranged to detect the gas parameters of the carbon dioxide-rich gas; the detection assembly two is arranged to detect the gas parameters of the carbon dioxide-lean gas; the flow regulating valve opening degree of the inlet side of each group of partition membrane assemblies is controlled according to the above detection results and the operation requirements.

[0021] The present application can effectively detect the membrane element; the inlet control valve, the control valve one and the control valve two can be closed to repair or replace a single membrane assembly without affecting the work of other partition membrane assemblies; the structure is simple and practical. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The present application is a system block diagram;

[0023] Wherein: 100, flue gas pipeline; 1, air inlet pipe; 11, flow meter; 12, flow regulating valve; 2, partition membrane assembly; 21, input pipe; 22, inlet control valve; 23, membrane element; 24, output pipe one; 241, control valve one; 25, output pipe two; 251, control valve two; 3, permeation side pipeline; 31, summary pipe one; 311, permeation side valve; 4, retentate side pipeline; 41, summary pipe two; 411, retentate side valve; 5, inlet detection assembly; 6, detection assembly one; 7, detection assembly two; 8, control unit. DETAILED DESCRIPTION

[0024] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be direct connection, also can indirectly connect through the intermediate medium, can be two element internal communication or two element mutual action relation.The "first", "second" and similar words mentioned in the application do not indicate any order, quantity or importance, but only distinguish different components.Similarly, "one" or "a" and similar words do not indicate quantity limit, but indicate that there is at least one.In the implementation of the application, the association relationship of the associated objects is described as "and / or", which indicates that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone.In the description of the embodiments of the application, unless otherwise specified, "a plurality of" means two or more.For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0025] The utility model will be described in detail below.

[0026] As shown in the figure: Figure 1

[0027] A membrane carbon capture system, comprising a plurality of groups of partition membrane assemblies 2 connected with flue gas pipeline 100 respectively, a permeation side pipeline 3 connected with a plurality of groups of partition membrane assemblies 2 respectively and used for collecting and discharging carbon dioxide-rich gas, a retentate side pipeline 4 connected with a plurality of groups of partition membrane assemblies 2 respectively and used for collecting and discharging carbon dioxide-lean gas, an inlet detection assembly 5 used for detecting gas parameters of flue gas entering each group of partition membrane assemblies 2 and connected with flue gas pipeline 100, a detection assembly one 6 used for detecting gas parameters of carbon dioxide-rich gas discharged by each group of partition membrane assemblies 2 and connected with flue gas pipeline 100, a detection assembly two 7 used for detecting gas parameters of carbon dioxide-lean gas discharged by each group of partition membrane assemblies 2 and connected with partition membrane assemblies 2, a flow regulating valve 12 arranged at the inlet side of each group of partition membrane assemblies 2, and a control unit 8 connected with the inlet detection assembly 5, the detection assembly one 6, the detection assembly two 7 and the flow regulating valve 12 respectively;The inlet detection assembly 5, the detection assembly one 6 and the detection assembly two 7 are arranged one-to-one corresponding to the partition membrane assemblies 2 and connected with each other;

[0028] The gas parameters described herein include carbon dioxide concentration, oxygen concentration, gas humidity, gas temperature and gas pressure.

[0029] ​Specifically, the inlet detection assembly 5, the detection assembly one 6, and the detection assembly two 7 are the same; including a gas analyzer for detecting the concentration of carbon dioxide and oxygen, a humidity meter for detecting the H2O content in the gas, a pressure gauge for detecting the gas pressure, and a thermometer for detecting the temperature;

[0030] The gas analyzer, the humidity meter, the pressure gauge, and the thermometer are respectively connected with the control unit 8.

[0031] In some possible embodiments, a plurality of groups of gas inlet pipes 1 connected with the zoned membrane assemblies 2 are arranged on the flue gas pipeline 100; the gas inlet pipes 1 are arranged in one-to-one correspondence with the zoned membrane assemblies 2; each group of zoned membrane assemblies 2 is connected with the flue gas pipeline 100 through a group of gas inlet pipes 1.

[0032] In some possible embodiments, the flow regulating valve 12 is arranged on the gas inlet pipe 1.

[0033] Each group of gas inlet pipes 1 is connected with an inlet detection assembly 5 for detecting the gas parameters in each zoned membrane assembly 2;

[0034] Each group of zoned membrane assemblies 2 is connected with a detection assembly one 6 for detecting the related parameters of the gas on the permeation side of each zoned membrane assembly 2;

[0035] Each group of zoned membrane assemblies 2 is connected with a detection assembly two 7 for detecting the related parameters of the gas on the retentate side of each zoned membrane assembly 2.

[0036] In use, according to the patrol test results of the inlet detection assembly 5, the detection assembly one 6, and the detection assembly two 7 and the operation needs, the opening degree of the flow regulating valve 12 at the inlet of each zoned membrane assembly 2 is automatically controlled through the control unit 8, so as to adjust the number of zoned membrane assemblies 2 put into operation according to the needs of different operation conditions, and to realize the performance detection of a single zoned membrane assembly 2.

[0037] In some possible embodiments, a flow meter 11 is further arranged on each group of gas inlet pipes 1; the flow meter 11 is arranged between the flow regulating valve 12 and the flue gas pipeline 100, that is, the flow meter 11 and the flow regulating valve 12 are arranged in sequence along the flow direction of the flue gas; the flow of the gas entering each group of zoned membrane assemblies 2 is adjusted through the flow meter 11, the flow regulating valve 12, and the control unit 8.

[0038] In some possible embodiments, the connection point of the inlet detection assembly 5 and the flue gas pipeline 100 is arranged between the zoned membrane assembly 2 and the flow regulating valve 12.

[0039] In some possible implementation manners, the partitioned membrane assembly 2 comprises a plurality of membrane elements 23 connected with the gas inlet pipe 1, the permeation side pipe 3 and the retentate side pipe 4 respectively; the membrane elements 23 are arranged in one-to-one correspondence with the gas inlet pipe 1 and are connected with each other.

[0040] In some possible implementation manners, each of the membrane elements 23 is provided with an output pipe one 24 connected with the permeation side pipe 3 and used for discharging the carbon dioxide-rich gas in the membrane element 23; the membrane element 23 is provided with an output pipe two 25 connected with the retentate side pipe 4 and used for discharging the carbon dioxide-lean gas in the membrane element 23; and each of the membrane elements 23 is provided with an input pipe 21 connected with the gas inlet pipe 1.

[0041] In some possible implementation manners, the output pipe one 24 is provided with a control valve one 241; the output pipe two 25 is provided with a control valve two 251; and the input pipe 21 is provided with an inlet control valve 22.

[0042] In some possible implementation manners, the permeation side pipe 3 is provided with a plurality of collection pipes one 31 arranged in one-to-one correspondence with the partitioned membrane assemblies 2 and connected with a detection assembly one 6; each of the collection pipes one 31 is connected with the output pipe one 24 in the corresponding partitioned membrane assembly 2; and the collection pipe one 31 is provided with a permeation side valve 311.

[0043] The collection pipe one 31 is connected with the output pipe one 24, so that the carbon dioxide-rich gas in each of the partitioned membrane assemblies 2 is collected and delivered to the permeation side pipe 3; and the detection assembly one 6 is connected with the collection pipe one 31, so that the gas parameters of the carbon dioxide-rich gas in each of the partitioned membrane assemblies 2 are detected.

[0044] The retentate side pipe 4 is provided with a plurality of collection pipes two 41 arranged in one-to-one correspondence with the partitioned membrane assemblies 2 and connected with a detection assembly two 7; each of the collection pipes two 41 is connected with the output pipe two 25 in the corresponding partitioned membrane assembly 2; and the collection pipe two 41 is provided with a retentate side valve 411.

[0045] The collection pipe two 41 is connected with the output pipe two 25, so that the carbon dioxide-lean gas in each of the partitioned membrane assemblies 2 is collected and delivered to the retentate side pipe 4; and the detection assembly two 7 is connected with the collection pipe two 41, so that the gas parameters of the carbon dioxide-lean gas in each of the partitioned membrane assemblies 2 are detected; and the permeation side valve 311 and the retentate side valve 411 are used for controlling the working state of each of the partitioned membrane assemblies 2.

[0046] Embodiment 1:

[0047] When all the membrane elements 23 participate in operation in the utility model:

[0048] The flow regulating valve 12, the inlet control valve 22, the control valve two 251, the control valve one 241, the permeation side valve 311 and the retentate side valve 411 arranged at the inlet side of each partitioned membrane assembly 2 are in the open state, and the flue gas passes through the inlet pipe 1, the flow meter 11 and the flow regulating valve 12, and then the inlet detection assembly 5 detects the flue gas to be introduced into the membrane element 23, so that the gas parameters of the inlet side of each partitioned membrane assembly 2 are obtained; and then the flue gas enters all the membrane elements 23.

[0049] The gas enters the membrane element 23 through the input pipe 21 and the inlet control valve 22, and is separated by the membrane element 23;

[0050] The separated carbon dioxide-poor gas is collected at the retentate side of the membrane element 23, sequentially passes through the control valve two 251 and the retentate side valve 411, and then is collected through the collection pipe two 41 to form total carbon dioxide-poor gas, which is discharged through the retentate side pipe 4; the gas parameters of the retentate side of each partitioned membrane assembly 2 are detected by the detection assembly two 7, so that the gas parameters of the carbon dioxide-poor gas of the retentate side of each partitioned membrane assembly 2 are obtained.

[0051] The separated carbon dioxide-rich gas is collected at the permeation side of the membrane element 23, sequentially passes through the control valve one 241 and the permeation side valve 311, and then is collected through the collection pipe one 31 to form total carbon dioxide-rich gas, which is discharged through the permeation side pipe 3; the gas parameters of the permeation side of each partitioned membrane assembly 2 are detected by the detection assembly one 6, so that the gas parameters of the carbon dioxide-rich gas of the permeation side of each partitioned membrane assembly 2 are obtained.

[0052] Example 2:

[0053] When the utility model is applied to automatically adjust the operation condition of the membrane element 23:

[0054] The flow regulating valve 12, the inlet control valve 22, the control valve one 241, the control valve two 251, the permeation side valve 311 and the retentate side valve 411 of each partitioned membrane assembly 2 are in the open state; according to the need of system operation, the inlet detection assembly 5, the detection assembly one 6 and the detection assembly two 7 are used to detect the system, so that the gas parameters of the inlet side (the inlet side), the permeation side and the retentate side of each partitioned membrane assembly 2 are measured, and the gas parameter data are transmitted to the control unit 8; the control unit 8 analyzes the data and controls the opening degree of the flow regulating valve 12 connected to each partitioned membrane assembly 2, so that each partitioned membrane assembly 2 can achieve the best carbon capture effect.

[0055] Example 3:

[0056] When the utility model is applied to the operation of partial partition membrane assembly 2, the flow regulating valve 12 of the other partial partition membrane assembly 2 is closed, and the corresponding permeation side valve 311 and retentate side valve 411 are closed; the valves (flow regulating valve 12, inlet control valve 22, control valve one 241, control valve two 251, permeation side valve 311 and retentate side valve 411) of the rest partition membrane assembly 2 are opened, and the system is operated in the same way as in embodiment 1.

[0057] Embodiment 4:

[0058] When the utility model is applied to the detection of membrane element 23, the specific steps are as follows:

[0059] According to the needs of system operation, when the performance of one membrane element 23 in a certain partition membrane assembly 2 is tested, the flow regulating valve 12, permeation side valve 311 and retentate side valve 411 of the partition membrane assembly 2 are opened, the inlet control valve 22, control valve one 241 and control valve two 251 of the membrane element 23 are opened, the inlet control valve 22, control valve one 241 and control valve two 251 of the rest membrane elements 23 in the partition membrane assembly 2 are closed, and the rest partition membrane assemblies 2 are operated as required, so that the performance parameters of the membrane element 23 can be calculated.

[0060] The utility model is not limited to the foregoing specific embodiments. The utility model extends to any new feature disclosed in the specification or any new combination, and any new method or process step or any new combination disclosed.

Claims

1. A membrane-based carbon capture system, characterized in that, The system comprises multiple sets of partitioned membrane assemblies connected with flue gas pipelines, a permeation side pipeline connected with the multiple sets of partitioned membrane assemblies and used for collecting and discharging the carbon dioxide-rich gas, a non-permeation side pipeline connected with the multiple sets of partitioned membrane assemblies and used for collecting and discharging the carbon dioxide-lean gas, an inlet detection assembly for detecting the gas parameters of the flue gas entering each set of partitioned membrane assemblies and arranged in one-to-one correspondence with the partitioned membrane assemblies, a detection assembly one for detecting the gas parameters of the carbon dioxide-rich gas discharged by each set of partitioned membrane assemblies and arranged in one-to-one correspondence with the partitioned membrane assemblies, a detection assembly two for detecting the gas parameters of the carbon dioxide-lean gas discharged by each set of partitioned membrane assemblies and arranged in one-to-one correspondence with the partitioned membrane assemblies, a flow regulating valve arranged at the inlet side of each set of partitioned membrane assemblies, and a control unit connected with the inlet detection assembly, the detection assembly one, the detection assembly two and the flow regulating valve, respectively.

2. A membrane-based carbon capture system according to claim 1, wherein, Multiple gas inlet pipes connected with the partitioned membrane assemblies are arranged on the flue gas pipeline.

3. A membrane-based carbon capture system according to claim 2, wherein, The flow regulating valve is arranged on the gas inlet pipe.

4. A membrane-based carbon capture system according to claim 3, wherein, The connection point of the inlet detection assembly with the flue gas pipeline is arranged between the partitioned membrane assembly and the flow regulating valve.

5. A membrane-based carbon capture system according to claim 2, wherein, The partitioned membrane assembly comprises multiple membrane elements connected with the gas inlet pipe, the permeation side pipeline and the non-permeation side pipeline, respectively.

6. A membrane-based carbon capture system according to claim 5, wherein, An output pipe one connected with the permeation side pipeline and used for discharging the carbon dioxide-rich gas, an output pipe two connected with the non-permeation side pipeline and used for discharging the carbon dioxide-lean gas, and an input pipe connected with the gas inlet pipe are arranged on the membrane element.

7. A membrane-based carbon capture system according to claim 6, wherein; A control valve one is arranged on the output pipe one, a control valve two is arranged on the output pipe two, and an inlet control valve is arranged on the input pipe.

8. A membrane-based carbon capture system according to claim 7, wherein, A collection pipe one connected with the detection assembly one and arranged in one-to-one correspondence with the partitioned membrane assemblies is arranged on the permeation side pipeline, and the collection pipe one is connected with the output pipe one in each set of partitioned membrane assemblies, respectively. A collection pipe two connected with the detection assembly two and arranged in one-to-one correspondence with the partitioned membrane assemblies is arranged on the non-permeation side pipeline, and the collection pipe two is connected with the output pipe two in each set of partitioned membrane assemblies, respectively.

9. A membrane-based carbon capture system according to claim 2, wherein, A flow meter connected with the control unit is further arranged on the gas inlet pipe.

10. The membrane-based carbon capture system of claim 2, wherein, The inlet detection assembly, the detection assembly one and the detection assembly two are the same, and comprise a gas analyzer for detecting the carbon dioxide concentration and the oxygen concentration, a humidity meter for detecting the H2O content in the gas, a pressure meter for detecting the gas pressure, and a thermometer for detecting the temperature.

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