A targeted purification system for carbon monoxide raw gas

Abstract

The present application relates to the field of carbon monoxide feed gas purification and provides a targeted purification system for carbon monoxide feed gas. The targeted purification system includes a diagnostic unit, an adsorption unit, and a distillation unit. The diagnostic unit includes a controller and a detector. The detector is used to detect impurity components and impurity contents in the carbon monoxide feed gas. The controller activates at least one of the adsorption unit and the distillation unit to separate the impurity components based on the impurity components and corresponding impurity contents. The controller can select single adsorption, single distillation, or adsorption combined with distillation to purify the carbon monoxide feed gas based on the impurity components and impurity contents. The controller can adjust the corresponding purification method in a targeted manner according to changes in the purity of the carbon monoxide feed gas. The system has strong purity adaptability of the carbon monoxide feed gas and achieves targeted purification of the carbon monoxide feed gas.

Description

Technical Field

[0001] The present application relates to the field of carbon monoxide raw gas purification, and in particular to a targeted purification system for carbon monoxide raw gas. Background Art

[0002] Isotope carbon 13 13 C is increasingly used in agriculture, organic chemistry, pharmacology and medicine, where it is used as a tracer atom. 13 C urea breath test is widely used in medical clinical diagnosis. 13 The demand for C is increasing. 13 The production methods of C include gas diffusion method, thermal diffusion method, chemical exchange method, laser method and carbon monoxide (CO) cryogenic distillation method. At present, only carbon monoxide cryogenic distillation method has been realized in industrial application. The carbon monoxide cryogenic distillation method is to obtain carbon monoxide gas through multi-stage distillation. 13 C high-abundance carbon monoxide gas. In the cryogenic distillation of carbon monoxide, the cryogenic distillation unit operates at a temperature of 70K to 80K. Therefore, the purity of the raw carbon monoxide gas must be extremely high. Otherwise, impurities in the carbon monoxide gas can clog the pipes in the cryogenic distillation unit, affecting separation efficiency and, in severe cases, causing the unit to fail. The carbon monoxide used in the cryogenic distillation of carbon monoxide (CO) is obtained by purifying the raw carbon monoxide gas.

[0003] The sources of carbon monoxide raw gas are relatively wide. The impurities in carbon monoxide raw gas mainly include carbon dioxide (CO2), water (H2O), oxygen (O2), nitrogen (N2) and hydrogen (H2). Because the sources of carbon monoxide raw gas are wide, the purity of carbon monoxide in the raw gas varies, and the impurity components and impurity contents vary greatly, which brings great challenges to the purification process of carbon monoxide raw gas. Summary of the Invention

[0004] In view of this, the present application hopes to provide a targeted purification system for carbon monoxide feed gas, which can be applicable to carbon monoxide feed gas with different impurity components and / or impurity contents.

[0005] In order to achieve the above-mentioned objectives, the present application provides a targeted purification system for carbon monoxide raw gas, which includes a diagnostic unit, an adsorption unit and a distillation unit. The diagnostic unit includes a controller and a detector. The detector is used to detect the impurity components and impurity contents in the carbon monoxide raw gas. The controller starts at least one of the adsorption unit and the distillation unit according to the impurity components and the impurity contents to separate the impurity components.

[0006] In some embodiments, the adsorption unit includes a plurality of adsorption modules, the distillation unit includes a plurality of distillation modules, and the controller starts at least one of the plurality of adsorption modules and the plurality of distillation modules according to the impurity components and the impurity content.

[0007] In some embodiments, at least two of the adsorption modules have different adsorption temperatures.

[0008] In some embodiments, at least one of the adsorption modules adopts room temperature adsorption, and at least one of the adsorption modules adopts low temperature adsorption.

[0009] In some embodiments, the distillation temperatures of at least two of the distillation modules are different.

[0010] In some embodiments, at least two of the distillation modules have different packing materials.

[0011] In some embodiments, the adsorbents of at least two of the adsorption modules are different.

[0012] In some embodiments, the diagnostic unit includes a relationship module, which includes a mapping relationship table, wherein the mapping relationship table has a mapping relationship between adsorbent type, impurity component and adsorption performance. The controller can query the mapping relationship table according to the impurity combination and impurity content to start at least one of the multiple adsorption modules.

[0013] In some embodiments, the targeted purification system includes a plurality of skid-mounted containers, and each of the adsorption modules and each of the distillation modules are respectively assembled in the plurality of skid-mounted containers.

[0014] In some embodiments, the carbon monoxide raw gas is extracted from coke oven gas, reformed gas or manufactured coal gas.

[0015] The targeted purification system of the embodiment of the present application can be applied to carbon monoxide raw gas with different impurity components and / or impurity contents. During the production process, the categories of impurity components and / or impurity contents of the carbon monoxide raw gas vary greatly, that is, the purity of the carbon monoxide raw gas changes. The detector can detect the changes in impurity components and / or impurity contents. The controller can choose to purify the carbon monoxide raw gas by single adsorption, single distillation, or adsorption combined with distillation according to the impurity components and impurity contents. The controller can adjust the corresponding purification method in a targeted manner according to the purity changes of the carbon monoxide raw gas. It has strong purity adaptability of the carbon monoxide raw gas, ensures the purification effect of the carbon monoxide raw gas, and realizes online automatic switching of the purification process function and / or unmanned function through the controller to achieve targeted purification of the carbon monoxide raw gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1Schematic diagram of the structure of a targeted purification system for carbon monoxide feed gas in one embodiment of the present application.

[0017] Description of Reference Numerals

[0018] Diagnostic unit 1; controller 11; detector 12; adsorption unit 2; adsorption module 21; distillation unit 3; distillation module 31; first pipeline 4; second pipeline 5. DETAILED DESCRIPTION

[0019] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0020] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments. The descriptions of "first", "second", etc. in the embodiments of the present application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly including at least one feature. In the description of the embodiments of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0021] See also Figure 1 The embodiment of the present application provides a targeted purification system for carbon monoxide feed gas. The targeted purification system includes a diagnostic unit 1, an adsorption unit 2, and a distillation unit 3. The diagnostic unit 1 includes a controller 11 and a detector 12. The detector 12 is used to detect the impurity components and impurity content in the carbon monoxide feed gas. The controller 11 activates at least one of the adsorption unit 2 and the distillation unit 3 to separate the impurity components based on the impurity components and impurity content. That is, along the flow direction of the carbon monoxide feed gas, the diagnostic unit 1 is located upstream of the adsorption unit 2 and the distillation unit 3. In this way, the carbon monoxide feed gas is first diagnosed by the diagnostic unit 1 and then subjected to adsorption and / or distillation separation.

[0022] The adsorption unit 2 absorbs the impurity components onto the surface of the adsorbent through the adsorption effect of the adsorbent.

[0023] The distillation unit 3 separates the impurity components from the carbon monoxide gas by utilizing the difference in boiling points between the impurity components and the carbon monoxide gas.

[0024] Impurity content refers to the proportion of impurity components in the carbon monoxide raw gas.

[0025] In one embodiment, the carbon monoxide raw gas is extracted from coke oven gas, reformed gas or artificial coal gas. Coke oven gas is a mixed gas produced when several flue gases are subjected to high-temperature dry distillation in a coke oven, while coke and tar products are produced. Reformed gas is a mixed gas produced by pyrolysis and steam decomposition of high-calorific value natural refinery gas. Artificial coal gas is a mixed gas produced by dry distillation, vaporization or cracking of solid fuels such as coal and coke or liquid fuels such as heavy oil. Since the carbon monoxide raw gas is extracted from coke oven gas, reformed gas or artificial coal gas, the impurity components and / or impurity content in the carbon monoxide raw gas from different sources are different. The targeted purification system can be used for the targeted purification of carbon monoxide raw gas from different sources (Modular Targeted Purification, MTP).

[0026] In one embodiment, the impurity components include one or more of carbon dioxide, water, oxygen, nitrogen, methane and hydrogen.

[0027] Due to the different sources of carbon monoxide raw gas, the impurity components and / or the impurity contents corresponding to the impurity components in the carbon monoxide raw gas are different, for example, the contents of carbon dioxide, water, oxygen, nitrogen and / or hydrogen are different, which will affect the purification process of the carbon monoxide raw gas. For example, when the types of impurity components are small and the impurity content is low, single adsorption or single distillation can be used to separate the impurity components, which can save purification time and cost. When the types of impurity components are large and / or the impurity content is high, adsorption combined with distillation can be used, which can purify the carbon monoxide raw gas more thoroughly and efficiently, taking into account both cost and efficiency.

[0028] The targeted purification system of the embodiment of the present application can be applied to carbon monoxide raw gas with different impurity components and / or impurity contents. During the production process, the categories of impurity components and / or impurity contents of the carbon monoxide raw gas vary greatly, that is, the purity of the carbon monoxide raw gas changes. The detector 12 can detect the changes in impurity components and / or impurity contents. The controller 11 can choose to purify the carbon monoxide raw gas by single adsorption, single distillation, or adsorption combined with distillation according to the impurity components and impurity contents. The corresponding purification method is targetedly adjusted according to the purity changes of the carbon monoxide raw gas. It has strong purity adaptability of the carbon monoxide raw gas, ensures the purification effect of the carbon monoxide raw gas, and realizes online automatic switching of the purification process function and / or unmanned function through the controller 11 to achieve targeted purification of the carbon monoxide raw gas.

[0029] It is understood that the target gas produced by the targeted purification system can be high-purity carbon monoxide, wherein the carbon monoxide content in the high-purity carbon monoxide is higher than the carbon monoxide content in the carbon monoxide feed gas. For example, the carbon monoxide content in the high-purity carbon monoxide can be greater than or equal to 99.999%. The carbon dioxide, water, oxygen, nitrogen, and hydrogen contents in the high-purity carbon monoxide are all less than 1 ppm (parts per million).

[0030] It should be noted that adsorption alone refers to adsorption without distillation, i.e., the MTP-A mode (A: Adsorption, adsorption separation mode). Distillation alone refers to distillation without adsorption, i.e., the MTP-D mode (D: Distillation, distillation separation mode). Adsorption combined with distillation refers to both adsorption and distillation, i.e., the MTP-AD mode (AD: Adsorption & Distillation, adsorption and distillation combined mode).

[0031] Adsorption is the process by which one or more components in a fluid, such as carbon monoxide feed gas, are concentrated on an adsorbent when it comes into contact with the adsorbent. Distillation is the process by which components in a mixture, such as carbon monoxide feed gas, are separated by utilizing their different boiling points.

[0032] In one embodiment, please refer to Figure 1 The adsorption unit 2 includes a plurality of adsorption modules 21, and the distillation unit 3 includes a plurality of distillation modules 31. The controller 11 starts at least one of the plurality of adsorption modules 21 and the plurality of distillation modules 31 according to the impurity components and the impurity content. For example, the controller 11 can start one or more adsorption modules 21 to separate the impurity components, so that the carbon monoxide raw gas is purified by one or more stages of single adsorption. For another example, the controller 11 can start one or more distillation modules 31 to separate the impurity components, so that the carbon monoxide raw gas is purified by one or more stages of single distillation. For another example, the controller 11 can start one or more adsorption modules 21 and start one or more distillation modules 31. In this way, the carbon monoxide raw gas is purified by one or more stages of adsorption combined with distillation. With such a design, the controller 11 can realize more purification combinations, provide more purification schemes, and increase the selectivity of targeted purification to adapt to carbon monoxide raw gas with more complex sources. For specific impurity components, specific multi-stage adsorption and / or multi-stage distillation can be selected to achieve efficient purification of specific impurity components, with higher separation and purification effects, which can effectively improve the engineering economy of carbon monoxide feed gas purification technology.

[0033] In some embodiments, the flow of the carbon monoxide feed gas can be passively transported by pressure difference and / or gravity, without relying on an external driving source. Of course, the flow of the carbon monoxide feed gas can also be actively transported by driving a driving source.

[0034] For example, in one embodiment, please refer to Figure 1 The targeted purification system includes a first pipeline 4 and a first switch valve, and each first pipeline 4 is provided with a first switch valve. The first switch valve can open or close the first pipeline 4 in which it is located. Any two of the multiple adsorption modules 21 are connected through the first pipeline 4, and any two of the multiple distillation modules 31 are connected through the first pipeline 4. In this way, any two of the multiple adsorption modules 21 are connected in series through the first pipeline 4, that is, as long as the corresponding first switch valve is opened, the gas can flow between any two of the multiple adsorption modules 21. Any two of the multiple distillation modules 31 are connected in series through the first pipeline 4, that is, as long as the corresponding first switch valve is opened, the gas can flow between any two of the multiple distillation modules 31. In this way, the carbon monoxide raw gas can undergo one, two or more stages of adsorption, or the carbon monoxide raw gas can undergo one, two or more stages of distillation.

[0035] The first on-off valve includes, but is not limited to, a solenoid valve or a pneumatic valve. Taking a solenoid valve as an example, the first on-off valve can be electrically connected to the controller 11, which controls the first on-off valve to open or close the first pipeline 4. Taking a pneumatic valve as an example, the first on-off valve can be connected to an air compressor, which is electrically connected to the controller 11. The controller 11 controls the air compressor, which compresses air to drive the first on-off valve to open or close the first pipeline 4.

[0036] In one embodiment, please refer to Figure 1 The targeted purification system includes a second pipeline 5 and a second on-off valve, each of which is provided with a second on-off valve. The second on-off valve can open or close the second pipeline 5 in which it is located. Each adsorption module 21 is connected to at least one distillation module 31 via the second pipeline 5. In this way, each adsorption module 21 and at least one distillation module 31 are connected in series via the second pipeline 5. That is, as long as the corresponding second on-off valve is opened, gas can flow from one adsorption module 21 to at least one distillation module 31. In this way, the carbon monoxide feed gas can undergo at least one stage of adsorption and at least one stage of distillation.

[0037] The second on-off valve includes, but is not limited to, a solenoid valve or a pneumatic valve. Taking a solenoid valve as an example, the second on-off valve can be electrically connected to the controller 11, which controls the second on-off valve to open or close the second pipeline 5. Taking a pneumatic valve as an example, the second on-off valve can be connected to an air compressor, which is electrically connected to the controller 11. The controller 11 controls the air compressor, which compresses air to drive the second on-off valve to open or close the second pipeline 5.

[0038] In one embodiment, the adsorption temperatures of at least two adsorption modules 21 are different. In this way, adsorption at different temperatures can be achieved to accommodate different impurity components and achieve diversified deep adsorption.

[0039] In one embodiment, at least one adsorption module 21 adopts normal temperature adsorption, and at least one adsorption module 21 adopts low temperature adsorption. It is understandable that the temperature of normal temperature adsorption is higher than the temperature of low temperature adsorption. Normal temperature adsorption means that the temperature during the adsorption process can be between 0°C and 50°C. Low temperature adsorption means that the temperature during the adsorption process can be lower than 0°C. Normal temperature adsorption can remove a large amount of carbon dioxide and water from the carbon monoxide raw gas, and low temperature adsorption can not only deeply remove carbon dioxide and water from the carbon monoxide raw gas, but also remove trace impurities such as argon and organic gases such as methane from the carbon monoxide raw gas. In this way, the carbon monoxide raw gas is adsorbed at different temperatures so that the carbon dioxide content and the water content are both lower than 0.1ppm.

[0040] In one embodiment, the distillation temperatures of at least two distillation modules 31 are different. Different distillation temperatures are used to separate different impurity components. In this way, accurate separation of different impurity components can be achieved.

[0041] For example, in one embodiment, at least one of the multiple distillation modules 31 is used for heavy component distillation. At least one of the multiple distillation modules 31 is used for light component distillation. The boiling point of the heavy component is higher than that of the light component. For example, the boiling point of oxygen is higher than that of nitrogen and hydrogen. Therefore, the distillation module 31 used for heavy component distillation can be used to separate oxygen, while the distillation module 31 used for light component distillation can be used to separate nitrogen and hydrogen. By utilizing the different boiling points of the various components, oxygen, nitrogen, and hydrogen can be separated from the carbon monoxide feed gas.

[0042] For example, in some embodiments, the adsorption module 21 for room-temperature adsorption can be activated first, followed by the adsorption module 21 for low-temperature adsorption, followed by the distillation module 31 for heavy fraction distillation, and finally, the distillation module 31 for light fraction distillation. The distillation module 31 discharges high-purity carbon monoxide. In other words, the carbon monoxide feed gas can first undergo room-temperature adsorption, followed by low-temperature adsorption, to remove carbon dioxide and water through adsorption. Oxygen is then removed through heavy fraction distillation, and nitrogen and hydrogen are removed through light fraction distillation. Because the low-temperature adsorption temperature is lower than that of room-temperature adsorption, substances with relatively low boiling points, such as carbon dioxide, water, and other trace impurity gases, are easily liquefied during the low-temperature adsorption process. Placing the low-temperature adsorption downstream of the room-temperature adsorption process not only prevents the liquefied components from affecting downstream pipelines and / or equipment, facilitating deep purification of the carbon monoxide feed gas, but also results in a lower temperature for the adsorbed gas after low-temperature adsorption, closer to the distillation operating temperature. This facilitates the adsorbed gas entering the distillation module 31 and adapting to its operating temperature.

[0043] In one embodiment, at least two distillation modules 31 are filled with different packings. Different packings have different properties to accommodate different impurity components and impurity levels. For example, different packings can be used to deeply remove difficult-to-remove impurities, thereby achieving deep purification of the carbon monoxide feed gas.

[0044] The type of packing is not limited. For example, the packing includes but is not limited to structured packing or random packing. Random packing includes but is not limited to Dixon packing, triangular spiral packing or calendered ring packing.

[0045] The size of the filler can be determined according to the purification scale of the carbon monoxide raw gas.

[0046] The material of the packing includes but is not limited to stainless steel.

[0047] In some embodiments, the filler may be surface treated. Surface treatment can improve the separation effect of the filler.

[0048] In one embodiment, at least two adsorption modules 21 have different adsorbents. Different adsorbents have different properties, and different adsorbents are used to adapt to different impurity components and impurity contents, thereby achieving deep purification.

[0049] In some embodiments, the adsorption may be physical adsorption, ie, one or more components in the fluid are adsorbed to the surface of the adsorbent via weak van der Waals forces.

[0050] The adsorbent may be a porous material, which has a larger surface area and a better adsorption effect. Exemplary adsorbents include but are not limited to activated carbon or molecular sieves.

[0051] Exemplary activated carbon includes, but is not limited to, coconut shell activated carbon.

[0052] For example, the molecular sieve includes but is not limited to 4A molecular sieve or 5A molecular sieve, etc.

[0053] The adsorbent can be regenerated through desorption. In other words, the adsorbent is recycled through the reversible interaction of adsorption and desorption. The adsorbent regeneration method is not limited. For example, the adsorbent can be regenerated by heating, vacuuming, or flushing with a regeneration gas, or by one or more of these methods. Regeneration gases include, but are not limited to, high-purity carbon monoxide, nitrogen, or an inert gas. The inert gas may be helium, for example.

[0054] In some embodiments, the targeted purification system includes a temperature control device, and each adsorption module 21 and each distillation module 31 is provided with a temperature control device. The temperature control device can be used to adjust the temperature during adsorption in the adsorption module 21 and / or the regeneration of the adsorbent. The temperature control device can also be used to adjust the operating temperature of the distillation module 31 during distillation.

[0055] The temperature control device can adjust the temperature by heat exchange with a refrigerant. The types of refrigerants include, but are not limited to, liquid nitrogen or ethylene. Different temperatures can be provided by using different types of refrigerants.

[0056] In one embodiment, please refer to Figure 1 The diagnostic unit 1 includes a relationship module 13, which includes a mapping table containing mappings between adsorbent types, impurity components, and adsorption performance. The controller 11 can query the mapping table based on the impurity combination and impurity content to activate at least one of the multiple adsorption modules 21. Adsorption performance can be characterized by the amount of impurity components adsorbed by the adsorbent. In other words, the controller 11 can query the mapping table based on the impurity composition and impurity content to find a suitable adsorbent type and select the appropriate adsorption module 21.

[0057] The specific structure of the adsorption module 21 is not limited, and the adsorption module 21 can be an adsorber. The specific structure of the distillation module 31 is not limited, and the adsorption module 21 can be a distillation tower. It is understood that the specific structures of the adsorber and distillation tower not specified in this application can be understood based on the structures in the prior art.

[0058] In one embodiment, the targeted purification system includes multiple skid-mounted containers, each of which houses the adsorption modules 21 and the distillation modules 31. This facilitates the combination of the adsorption modules 21 and the distillation modules 31 based on the specific impurity components and impurity content in the carbon monoxide feed gas.

[0059] To more clearly illustrate the targeted purification system provided by the embodiments of the present application, several specific embodiments of the present application are exemplarily shown below:

[0060] Example 1

[0061] The purity of the carbon monoxide raw gas is about 99.9%. The impurity components and impurity contents detected by the detector 12 include carbon dioxide: 12ppm, water: 1.5ppm, nitrogen: 15ppm, and hydrogen: 0.8ppm. The flow rate of the carbon monoxide raw gas is 2.0m 3 / h (cubic meters per hour), the target value of the target gas, i.e., ultra-pure carbon monoxide, is: nitrogen less than 1ppm, carbon dioxide, water and hydrogen are all less than 0.1ppm. The controller 11 first determines the modular targeted purification scheme (i.e., MTP-AD mode) of activated carbon room temperature adsorption + molecular sieve low temperature adsorption + low temperature distillation to remove oxygen + low temperature distillation to remove hydrogen based on the detection results of the detector 12, i.e., the impurity components and impurity content: coconut shell activated carbon is selected as the activated carbon, 4A molecular sieve is selected as the molecular sieve, 4.0mm Dixon mesh ring random packing is selected for low temperature distillation, and liquid nitrogen is selected as the refrigerant. According to the given purification scheme, the controller 11 implements the corresponding adsorption module 21 and distillation module 31 to perform pre-operation preparation, which mainly includes preparation procedures such as activation of activated carbon and molecular sieve, purging, vacuum inspection, and start-up of the temperature control device. The controller 11 sequentially starts the adsorption module 21 using activated carbon for room temperature adsorption, the adsorption module 21 using molecular sieve for low temperature adsorption, the distillation module 31 using low temperature distillation to remove oxygen, and the distillation module 31 using low temperature distillation to remove hydrogen. The above separation modules are sequentially started, and the purity of the ultra-pure carbon monoxide gas obtained after purification is 99.999%, which meets the subsequent requirements. 13 Feed requirements for C isotope cryogenic distillation process.

[0062] Example 2

[0063] The purity of the carbon monoxide raw gas is about 98%. The impurity components and impurity contents detected by the detector 12 include carbon dioxide: 100ppm, water 100ppm, methane (CH4): 300ppm, oxygen: 30ppm, and hydrogen: 800ppm. The flow rate of the carbon monoxide raw gas is 40.0m 3 / h (cubic meters per hour), the target value of the target gas, i.e., ultra-pure carbon monoxide, is: oxygen is less than 1ppm, and carbon dioxide, water, methane, and hydrogen are all less than 0.1ppm. The controller 11 first determines the modular targeted purification scheme (i.e., MTP-AD mode) of activated carbon room temperature adsorption + low-temperature distillation to remove hydrogen + low-temperature distillation to remove methane and oxygen based on the detection results of the detector 12, i.e., the impurity components and impurity content: coconut shell activated carbon is selected as the activated carbon, and since the gas flow rate of the carbon monoxide raw gas is large, regular packing is used for low-temperature distillation, and liquid nitrogen is selected as the refrigerant medium. According to the given purification scheme, the controller 11 implements the corresponding adsorption module 21 and distillation module 31 to perform pre-operation preparation, which mainly includes preparation procedures such as activated carbon activation, purging, vacuum inspection, and start-up of the temperature regulating device. The controller 11 sequentially starts the adsorption module 21 using activated carbon for room temperature adsorption, the distillation module 31 using low temperature distillation to remove hydrogen, and the distillation module 31 using low temperature distillation to remove methane and oxygen. The above separation modules are started in sequence, and the purity of the ultra-pure carbon monoxide gas obtained after purification is 99.999%, which meets the subsequent requirements. 13 Feed requirements for C isotope cryogenic distillation process.

[0064] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, and improvements that fall within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A targeted purification system for carbon monoxide raw gas, characterized in that: The targeted purification system includes a diagnostic unit, an adsorption unit, and a distillation unit. The diagnostic unit includes a controller and a detector. The detector is used to detect impurity components and impurity content in the carbon monoxide feed gas. The controller activates at least one of the adsorption unit and the distillation unit according to the impurity components and the impurity content to separate the impurity components. The adsorption unit includes multiple adsorption modules, and at least two of the adsorption modules have different adsorbents; the diagnostic unit includes a relationship module, and the relationship module includes a mapping relationship table. The mapping relationship table has a mapping relationship between adsorbent type, impurity component and adsorption performance. The controller can query the mapping relationship table according to the impurity combination and impurity content to start at least one of the multiple adsorption modules.

2. The targeted purification system according to claim 1, characterized in that: The distillation unit includes a plurality of distillation modules, and the controller starts at least one of the plurality of adsorption modules and the plurality of distillation modules according to the impurity components and the impurity content.

3. The targeted purification system according to claim 2, characterized in that: At least two of the adsorption modules have different adsorption temperatures.

4. The targeted purification system according to claim 3, characterized in that: At least one of the adsorption modules adopts room temperature adsorption, and at least one of the adsorption modules adopts low temperature adsorption.

5. The targeted purification system according to claim 2, characterized in that: The distillation temperatures of at least two of the distillation modules are different.

6. The targeted purification system according to claim 2, characterized in that: The packing materials of at least two of the distillation modules are different.

7. The targeted purification system according to claim 2, characterized in that: The targeted purification system includes a plurality of skid-mounted containers, and each of the adsorption modules and each of the distillation modules are respectively assembled in the plurality of skid-mounted containers.

8. The targeted purification system according to any one of claims 1 to 7, characterized in that: The carbon monoxide raw gas is extracted from coke oven gas, reformed gas or manufactured coal gas.

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