Method for controlling parameters of regeneration tower of hydrogen-rich carbon circulating oxygen blast furnace decarburization system

Abstract

The invention belongs to the technical field of blast furnace decarburization systems, and particularly discloses a control method for parameters of a regeneration tower of a hydrogen-rich carbon circulating oxygen blast furnace decarburization system, which comprises the following steps: a data acquisition system acquires parameters in the production process of the decarburization system in real time and transmits the parameters to a DSC control system; and then calculating the real-time empty tower gas stripping flow velocity of the regeneration tower, comparing the real-time empty tower gas stripping flow velocity with the empty tower gas stripping flow velocity of the flooding point of the regeneration tower, and adjusting parameters in a decarburization system according to a comparison result. The problems that the purified gas index is unqualified, the system liquid level is unbalanced and a barren liquor pump is evacuated due to flooding of a decarburization system are solved. The real-time empty tower gas stripping flow rate of the regeneration tower is calculated according to the total removal amount of carbon dioxide in the regeneration tower of the decarburization system, the operation temperature of the regeneration tower and the operation pressure of the regeneration tower, the real-time calculated empty tower gas rate is compared with the flooding point gas stripping flow rate, and parameters in the decarburization system are adjusted according to the comparison result. Therefore, the flooding phenomenon of the regeneration tower is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace decarburization systems, and in particular to a method for controlling parameters of a regeneration tower of a hydrogen-rich carbon circulating oxygen blast furnace decarburization system. Background Art

[0002] The hydrogen-rich carbon cycle oxygen blast furnace removes carbon dioxide from the coal gas produced by the traditional blast furnace and recycles the coal gas back to the blast furnace for use. The decarbonization process is as follows: After the top coal gas of the hydrogen-rich carbon cycle oxygen blast furnace is pressurized, the top coal gas enters the tower from the bottom of the absorption tower, and contacts with the MDEA alcohol amine solution from top to bottom in the tower body to capture most of the CO2 in the hydrogen-rich carbon cycle oxygen blast furnace coal gas. After absorbing CO2 acid gas in the absorption tower, the lean liquid becomes rich liquid, and the rich liquid enters the flash tank for flash evaporation. The rich liquid after flash evaporation enters the regeneration tower, and the regeneration of CO2 gas is completed in the regeneration tower. Finally, after cooling, reflux, distillation and reboiling, the absorbent is regenerated, and the lean liquid is generated at the same time. Finally, the lean liquid returns to the absorption tower for continued use, and the low-carbon gas generated is finally discharged to achieve the recycling of amine liquid and reduce carbon emissions. The main function of the regeneration tower is to desorb most of the carbon dioxide in the secondary rich liquid circulated from the flash tank, and regenerate the rich amine liquid to the lean liquid to meet the use of the absorption tower.

[0003] In the decarbonization system of hydrogen-rich carbon circulating oxygen blast furnace, the problem of liquid flooding has always been a key problem restricting the operation of the regeneration tower, affecting the economic benefits of production and the quality of purified gas products. In the desorption process in the regeneration tower, the steam generated by the amine liquid after steam heating countercurrents with the secondary rich liquid entering the regeneration tower from the flash tank. At this time, the gas is the continuous phase and the liquid flows normally as the dispersed phase. When the steam generated at the bottom of the regeneration tower and the desorbed carbon dioxide gas velocity increase to a certain critical value, the two-phase flow changes dramatically. The liquid cannot flow smoothly due to the action of the gas and will accumulate in large quantities in the packing. The gas will pass through the liquid in the form of bubbles, accompanied by a sudden increase in the pressure drop in the tower, causing the liquid flow pattern in the tower to be chaotic and the liquid entrainment to be serious, deteriorating the mass transfer effect, and causing large fluctuations in continuous production, unqualified purified gas indicators, unbalanced system liquid levels, and empty lean liquid pumps. Summary of the invention

[0004] The purpose of the present invention is to provide a method for controlling the parameters of a regeneration tower in a hydrogen-rich carbon circulating oxygen blast furnace decarburization system, so as to solve the problem of liquid flooding in the hydrogen-rich carbon circulating oxygen blast furnace decarburization system, which causes chaotic liquid flow patterns in the tower and serious liquid entrainment, resulting in unqualified purified gas indicators, unbalanced system liquid levels and empty lean liquid pumps.

[0005] To achieve the above object, the basic scheme provided by the present invention is: a method for controlling the parameters of a regeneration tower of a hydrogen-rich carbon circulating oxygen blast furnace decarbonization system, comprising the following steps:

[0006] S1. The data acquisition system collects the total amount of carbon dioxide removed during the production process of the decarbonization system, the operating temperature of the regeneration tower, and the operating pressure of the regeneration tower in real time, and transmits them to the DSC control system;

[0007] S2, the DSC control system calculates the real-time empty tower gas lift flow rate of the regeneration tower according to the total amount of carbon dioxide removed, the operating temperature of the regeneration tower and the operating pressure of the regeneration tower collected in real time;

[0008] S3. The DSC control system compares the calculated real-time empty tower gas lift flow rate of the regeneration tower with the preset empty tower gas lift flow rate of the regeneration tower liquid flooding point. If the real-time empty tower gas lift flow rate of the regeneration tower is greater than 80% of the empty tower gas lift flow rate of the liquid flooding point, liquid flooding occurs in the regeneration tower, and the total amount of carbon dioxide removal, the operating temperature of the regeneration tower and the operating pressure of the regeneration tower need to be adjusted to make the real-time empty tower gas lift flow rate of the regeneration tower less than 80% of the empty tower gas lift flow rate of the liquid flooding point; if the real-time empty tower gas lift flow rate of the regeneration tower is less than 80% of the empty tower gas lift flow rate of the liquid flooding point, liquid flooding does not occur in the regeneration tower, and there is no need to adjust the regeneration tower parameters.

[0009] The beneficial effects of the present invention are as follows: the real-time empty tower gas lift flow rate of the regeneration tower is calculated according to the total amount of carbon dioxide removed in the regeneration tower of the decarbonization system, the operating temperature of the regeneration tower and the operating pressure of the regeneration tower, and the real-time calculated empty tower gas velocity is compared with the liquid flooding point gas lift flow rate, and the parameters in the decarbonization system are adjusted according to the comparison result, so as to guide the stable operation of the regeneration tower, realize stable production of the decarbonization device, and avoid problems such as liquid flooding, unqualified purified gas indicators, system liquid level imbalance and empty lean liquid pump caused by blind operation of the regeneration tower.

[0010] Scheme 2, which is the preferred basic scheme, in S2, the calculation formula of the gas stripping flow rate of the regeneration tower in real time is as follows:

[0011]

[0012] Where: Indicates the real-time empty tower gas lift velocity of the regeneration tower, unit: m / s; V 工况 Indicates the volume of regeneration gas under working condition, unit: m 3 / h; S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ;

[0013] The above V 工况 The calculation formula is as follows:

[0014]

[0015] Where: V 工况 Indicates the volume of regeneration gas under working condition, unit: m 3 / h;m 总Indicates the total gas phase load in the regeneration tower, unit: kg / h; ρ 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ;

[0016] The calculation formula of the above S is as follows:

[0017] S=πr 2

[0018] Where: S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ; r represents the radius of the cross-section circle, unit: m; π represents the circumference of a circle, the value is 3.14.

[0019] Scheme 3: This is the preferred option of scheme 2. 总 The calculation formula is as follows:

[0020]

[0021] Where: m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; Indicates the gas phase load of carbon dioxide in the regeneration tower, unit: kg / h; m 水蒸汽 Indicates the water vapor gas phase load in the regeneration tower, unit: kg / h; Indicates the total amount of carbon dioxide removed from the regeneration tower, unit: Nm 3 / h; represents the relative molecular mass of carbon dioxide, V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; M 水蒸汽 Indicates the relative molecular mass of water vapor, M 水蒸汽 =18 g / mol; V m Indicates the molar volume of gas under standard conditions, V m =22.4L / mol;

[0022] The 总 The calculation formula is as follows:

[0023]

[0024] Where: 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ; Indicates the carbon dioxide density in the regeneration tower, unit: kg / m 3 ρ 水蒸汽 Indicates the water vapor density in the regeneration tower, unit: kg / m 3 ; Indicates the operating pressure of the regeneration tower, unit: kpa; P 水蒸汽Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the relative molecular mass of carbon dioxide in the regeneration tower, R represents the molar gas constant, R = 8.314 J / (mol·K); T 操作 Indicates the operating temperature of the regeneration tower, unit: °C; T 标准 Indicates standard temperature, T 标准 =273.15K;M 水蒸汽 Represents the relative molecular mass of water vapor in the regeneration tower, M 水蒸汽 =18 g / mol.

[0025] Scheme 4, which is the preferred basic scheme, the V 水蒸汽 The calculation formula is as follows:

[0026]

[0027] Where: V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the total amount of carbon dioxide removed from the regeneration tower, unit: Nm 3 / h; P 总 Indicates the operating pressure of the regeneration tower, unit: kpa.

[0028] Scheme 5: This is the preferred basic scheme. Different operating temperatures of the regeneration tower correspond to different P 水蒸汽 , the operating temperature in the normal production process is 60 ~ 90 ℃, the corresponding P 水蒸汽 It is 19.933~70.121kpa.

[0029] Scheme 6, which is the preferred basic scheme, in S3, the empty tower gas stripping flow rate of the regeneration tower liquid flooding point is calculated by the regeneration tower full load parameter, and the calculation formula of the empty tower gas stripping flow rate of the regeneration tower liquid flooding point is as follows:

[0030]

[0031] Where: Indicates the empty tower gas lift velocity at the regeneration tower liquid flooding point, unit: m / s; V 液泛点 Indicates the volume of the regeneration gas-liquid flooding point, unit: m 3 / h; S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ;

[0032] The above V 液泛点 The calculation formula is as follows:

[0033]

[0034] Where: V 液泛点 Indicates the volume of the regeneration gas-liquid flooding point, unit: m 3 / h;m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; ρ 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ;

[0035] The calculation formula of the above S is as follows:

[0036] S=πr 2

[0037] Where: S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ; r represents the radius of the cross-section circle, unit: m; π represents the circumference of a circle, the value is 3.14.

[0038] Scheme 7, which is the preferred option of scheme 6, wherein m 总 The calculation formula is as follows:

[0039]

[0040] Where: m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; Indicates the gas phase load of carbon dioxide in the regeneration tower, unit: kg / h; m 水蒸汽 Indicates the water vapor gas phase load in the regeneration tower, unit: kg / h; Indicates the total amount of carbon dioxide removed at the flooding point of the regeneration tower, unit: Nm 3 / h; represents the relative molecular mass of carbon dioxide, =44 g / mol; V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; M 水蒸汽 Indicates the relative molecular mass of water vapor, M 水蒸汽 =18 g / mol; V m Indicates the molar volume of gas under standard conditions, V m =22.4L / mol;

[0041] The 总 The calculation formula is as follows:

[0042]

[0043] Where: 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ; Indicates the carbon dioxide density in the regeneration tower, unit: kg / m 3 ρ 水蒸汽 Indicates the water vapor density in the regeneration tower, unit: kg / m 3 ; Indicates the operating pressure of the regeneration tower, unit: kpa; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the relative molecular mass of carbon dioxide in the regeneration tower, R represents the molar gas constant, R = 8.314 J / (mol·K); T 液泛操作 Indicates the operating temperature of the regeneration tower flooding point, unit: °C; T 标准 Indicates standard temperature, T 标准 =273.15K;M 水蒸汽 Represents the relative molecular mass of water vapor in the regeneration tower, M 水蒸汽 =18 g / mol.

[0044] Scheme 8, which is the preferred embodiment of Scheme 7, wherein V 水蒸汽 The calculation formula is as follows:

[0045]

[0046] Where: V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, P 水蒸汽 =57.818kpa; Indicates the total amount of carbon dioxide removed at the flooding point of the regeneration tower, unit: Nm 3 / h; represents the operating pressure of the regeneration tower liquid flooding point, unit: kpa. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below through specific embodiments:

[0048] The implementation method of this embodiment is: a method for controlling the parameters of a regeneration tower of a hydrogen-rich carbon circulating oxygen blast furnace decarbonization system, comprising the following steps:

[0049] S1. The data acquisition system collects the total amount of carbon dioxide removed during the production process of the decarbonization system, the operating temperature of the regeneration tower, and the operating pressure of the regeneration tower in real time, and transmits them to the DSC control system;

[0050] S2, DSC control system calculates the real-time empty tower gas lift flow rate of the regeneration tower according to the total amount of carbon dioxide removed, the operating temperature of the regeneration tower and the operating pressure of the regeneration tower collected in real time. The calculation formula of the real-time empty tower gas lift flow rate of the regeneration tower is as follows:

[0051]

[0052] Where: Indicates the real-time empty tower gas lift velocity of the regeneration tower, unit: m / s; V 工况 Indicates the volume of regeneration gas under working condition, unit: m 3 / h; S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ;

[0053] The calculation formula of S is as follows:

[0054] S=πr 2

[0055] Where: S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ; r represents the radius of the cross-section circle, unit: m; π represents the circumference of a circle, valued at 3.14;

[0056] V 工况 The calculation formula is as follows:

[0057]

[0058] Where: V 工况 Indicates the volume of regeneration gas under working condition, unit: m 3 / h;m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; ρ 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ;

[0059] m 总 The calculation formula is as follows:

[0060]

[0061] Where: m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; Indicates the gas phase load of carbon dioxide in the regeneration tower, unit: kg / h; m 水蒸汽 Indicates the water vapor gas phase load in the regeneration tower, unit: kg / h; Indicates the total amount of carbon dioxide removed from the regeneration tower, unit: Nm 3 / h; represents the relative molecular mass of carbon dioxide, V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; M 水蒸汽 Indicates the relative molecular mass of water vapor, M 水蒸汽 =18 g / mol; V m Indicates the molar volume of gas under standard conditions, Vm =22.4L / mol;

[0062] V 水蒸汽 The calculation formula is as follows:

[0063]

[0064] Where: V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the total amount of carbon dioxide removed from the regeneration tower, unit: Nm 3 / h; P 总 Indicates the operating pressure of the regeneration tower, unit: kpa;

[0065] ρ 总 The calculation formula is as follows:

[0066] Since the gas phase is CO2 and water vapor, therefore:

[0067]

[0068] According to the ideal gas equation:

[0069] PV=nRT

[0070]

[0071] Also because

[0072] m=nM

[0073] T=T 操作 +T 标准

[0074]

[0075]

[0076] Where: 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ; Indicates the carbon dioxide density in the regeneration tower, unit: kg / m 3 ρ 水蒸汽 Indicates the water vapor density in the regeneration tower, unit: kg / m 3 ; Indicates the operating pressure of the regeneration tower, unit: kpa; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the relative molecular mass of carbon dioxide in the regeneration tower, R represents the molar gas constant, R = 8.314 J / (mol·K); T 操作 Indicates the operating temperature of the regeneration tower, unit: °C; T 标准 Indicates standard temperature, T 标准 =273.15K;M 水蒸汽 Represents the relative molecular mass of water vapor in the regeneration tower, M 水蒸汽 =18 g / mol;

[0077] Different operating temperatures of the regeneration tower correspond to different P 水蒸汽 , the operating temperature in the normal production process is 60 ~ 90 ℃, the corresponding P 水蒸汽 19.933~70.121kpa;

[0078] S3. The DSC control system compares the calculated real-time empty tower gas lift flow rate of the regeneration tower with the preset empty tower gas lift flow rate of the liquid flooding point of the regeneration tower. If the real-time empty tower gas lift flow rate of the regeneration tower is greater than 80% of the empty tower gas lift flow rate of the liquid flooding point, liquid flooding occurs in the regeneration tower, and the total amount of carbon dioxide removal, the operating temperature of the regeneration tower and the operating pressure of the regeneration tower need to be adjusted to make the real-time empty tower gas lift flow rate of the regeneration tower less than 80% of the empty tower gas lift flow rate of the liquid flooding point; if the real-time empty tower gas lift flow rate of the regeneration tower is less than 80% of the empty tower gas lift flow rate of the liquid flooding point, liquid flooding does not occur in the regeneration tower, and there is no need to adjust the regeneration tower parameters. The empty tower gas lift flow rate of the liquid flooding point of the regeneration tower is calculated by the full load parameters of the regeneration tower. The calculation formula of the empty tower gas lift flow rate of the liquid flooding point of the regeneration tower is as follows:

[0079]

[0080] Where: Indicates the empty tower gas lift velocity at the regeneration tower liquid flooding point, unit: m / s; V 液泛点 Indicates the volume of the regeneration gas-liquid flooding point, unit: m 3 / h; S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ;

[0081] The calculation formula of S is as follows:

[0082] S=πr 2

[0083] Where: S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ; r represents the radius of the cross-section circle, unit: m; π represents the circumference of a circle, valued at 3.14;

[0084] V 液泛点 The calculation formula is as follows:

[0085]

[0086] Where: V液泛点 Indicates the volume of the regeneration gas-liquid flooding point, unit: m 3 / h;m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; ρ 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ;

[0087] m 总 The calculation formula is as follows:

[0088]

[0089] Where: m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; Indicates the gas phase load of carbon dioxide in the regeneration tower, unit: kg / h; m 水蒸汽 Indicates the water vapor gas phase load in the regeneration tower, unit: kg / h; Indicates the total amount of carbon dioxide removed at the flooding point of the regeneration tower, unit: Nm 3 / h; represents the relative molecular mass of carbon dioxide, =44 g / mol; V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; M 水蒸汽 Indicates the relative molecular mass of water vapor, M 水蒸汽 =18 g / mol; V m Indicates the molar volume of gas under standard conditions, V m =22.4L / mol;

[0090] V 水蒸汽 The calculation formula is as follows:

[0091]

[0092] Where: V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, P 水蒸汽 =57.818kpa; Indicates the total amount of carbon dioxide removed at the flooding point of the regeneration tower, unit: Nm 3 / h; indicates the operating pressure of the regeneration tower liquid flooding point, unit: kpa;

[0093] ρ 总 The calculation formula is as follows:

[0094]

[0095] Where:总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ; Indicates the carbon dioxide density in the regeneration tower, unit: kg / m 3 ρ 水蒸汽 Indicates the water vapor density in the regeneration tower, unit: kg / m 3 ; Indicates the operating pressure of the regeneration tower, unit: kpa; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the relative molecular mass of carbon dioxide in the regeneration tower, R represents the molar gas constant, R = 8.314 J / (mol·K); T 液泛操作 Indicates the operating temperature of the regeneration tower flooding point, unit: °C; T 标准 Indicates standard temperature, T 标准 =273.15K;M 水蒸汽 Represents the relative molecular mass of water vapor in the regeneration tower, M 水蒸汽 =18 g / mol.

[0096] In the actual production process, the specific calculation process of the pre-set regeneration tower liquid flooding point empty tower gas lift flow rate is as follows:

[0097] Known parameters: P 液泛总 =161kpa, T 标准 =273.15K, T 液泛操作 =85℃,P 水蒸汽 =57.818kpa (see Table 1 for details), M 水蒸汽 =18g / mol, R=8.314J / (mol·K), V m =22.4L / mol, π=3.14, r=4.5m.

[0098] ρ 总 The specific calculation process is as follows:

[0099]

[0100] ρ 总 =1.877Kg / m 3

[0101] V 水蒸汽 The specific calculation process is as follows:

[0102]

[0103] V 水蒸汽 =37420Nm 3 / h

[0104] m 总 The specific calculation process is as follows:

[0105]

[0106] m 总 =234748.2Kg / h

[0107] V 液泛点 The specific calculation process is as follows:

[0108]

[0109] V 液泛点 =125065.6m 3 / h

[0110] The specific calculation process of S is as follows:

[0111] S=πr 2

[0112] S=3.14×4.5 2

[0113] S=63.585m 2

[0114] The specific calculation process is as follows:

[0115]

[0116] Therefore, the pre-set regeneration tower liquid flooding point empty tower gas lift flow rate The 80% of the empty tower gas lift velocity at the regeneration tower liquid flooding point is 0.4344 m / s.

[0117] In normal production process, real-time collection P 总 =125kpa, T 标准 =273.15K, T 操作 =75℃, P 水蒸汽 =38.565kpa (see Table 1 for details), M 水蒸汽 =18g / mol, R=8.314J / (mol·K), V m =22.4L / mol, π=3.14, r=4.5m.

[0118] ρ 总 The specific calculation process is as follows:

[0119]

[0120] ρ总 =1.553Kg / m 3

[0121] V 水蒸汽 The specific calculation process is as follows:

[0122]

[0123] V 水蒸汽 =29001.273Nm 3 / h

[0124] m 总 The specific calculation process is as follows:

[0125]

[0126] m 总 =150983.17Kg / h

[0127] V 工况 The specific calculation process is as follows:

[0128]

[0129] V 工况 =97220.33m 3 / h

[0130] The specific calculation process of S is as follows:

[0131] S=πr 2

[0132] S=3.14×4.5 2

[0133] S=63.585m 2

[0134] The specific calculation process is as follows:

[0135]

[0136] Regeneration tower real-time empty tower gas lift flow rate Regeneration tower liquid flooding point empty tower gas lift flow rate 80% of the empty tower gas lift flow rate at the regeneration tower flooding point is 0.4344 m / s, and 0.425<0.4344 m / s. Therefore, there is no flooding in the regeneration tower and there is no need to adjust the regeneration tower parameters.

[0137] Table 1: Water vapor pressure values ​​corresponding to operating temperature

[0138]

[0139] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for controlling parameters of a regeneration tower in a hydrogen-rich carbon cycle oxygen blast furnace decarbonization system, characterized in that: The following steps are involved: S1. The data acquisition system collects the total amount of carbon dioxide removed during the production process of the decarbonization system, the operating temperature of the regeneration tower, and the operating pressure of the regeneration tower in real time, and transmits them to the DSC control system; S2, the DSC control system calculates the real-time empty tower gas lift flow rate of the regeneration tower according to the total amount of carbon dioxide removed, the operating temperature of the regeneration tower and the operating pressure of the regeneration tower collected in real time; S3. The DSC control system compares the calculated real-time empty tower gas lift flow rate of the regeneration tower with the preset empty tower gas lift flow rate of the regeneration tower liquid flooding point. If the real-time empty tower gas lift flow rate of the regeneration tower is greater than 80% of the empty tower gas lift flow rate of the liquid flooding point, liquid flooding occurs in the regeneration tower, and the total amount of carbon dioxide removal, the operating temperature of the regeneration tower and the operating pressure of the regeneration tower need to be adjusted to make the real-time empty tower gas lift flow rate of the regeneration tower less than 80% of the empty tower gas lift flow rate of the liquid flooding point; if the real-time empty tower gas lift flow rate of the regeneration tower is less than 80% of the empty tower gas lift flow rate of the liquid flooding point, liquid flooding does not occur in the regeneration tower, and there is no need to adjust the regeneration tower parameters.

2. The method for controlling the parameters of the regeneration tower of the hydrogen-rich carbon cycle oxygen blast furnace decarbonization system according to claim 1 is characterized in that: In S2, the calculation formula of the gas lift flow rate of the regeneration tower in real time is as follows: Where: θ 实时 Indicates the real-time empty tower gas lift velocity of the regeneration tower, unit: m / s; V 工况 Indicates the volume of regeneration gas under working condition, unit: m 3 / h; S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ; The above V 工况 The calculation formula is as follows: Where: V 工况 Indicates the volume of regeneration gas under working condition, unit: m 3 / h;m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; ρ 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ; The calculation formula of the above S is as follows: S＝πr 2 Where: S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ; r represents the radius of the cross-section circle, unit: m; π represents pi, the value is 3.

14.

3. The method for controlling the parameters of the regeneration tower of the hydrogen-rich carbon cycle oxygen blast furnace decarbonization system according to claim 2 is characterized in that: The m 总 The calculation formula is as follows: Where: m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; Indicates the gas phase load of carbon dioxide in the regeneration tower, unit: kg / h; m 水蒸汽 Indicates the water vapor gas phase load in the regeneration tower, unit: kg / h; Indicates the total amount of carbon dioxide removed from the regeneration tower, unit: Nm 3 / h; represents the relative molecular mass of carbon dioxide, V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; M 水蒸汽 Represents the relative molecular mass of water vapor, M 水蒸汽 =18 g / mol; V m Indicates the molar volume of gas under standard conditions, V m =22.4L / mol; The 总 The calculation formula is as follows: Where: 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ; Indicates the carbon dioxide density in the regeneration tower, unit: kg / m 3 ; ρ 水蒸汽 Indicates the water vapor density in the regeneration tower, unit: kg / m 3 ;P 总 Indicates the operating pressure of the regeneration tower, unit: kpa; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the relative molecular mass of carbon dioxide in the regeneration tower, R represents the molar gas constant, R = 8.314 J / (mol·K); T 操作 Indicates the operating temperature of the regeneration tower, unit: °C; T 标准 Indicates standard temperature, T 标准 =273.15K;M 水蒸汽 Represents the relative molecular mass of water vapor in the regeneration tower, M 水蒸汽 =18 g / mol.

4. The method for controlling the parameters of the regeneration tower of the hydrogen-rich carbon cycle oxygen blast furnace decarbonization system according to claim 3 is characterized in that: The V 水蒸汽 The calculation formula is as follows: Where: V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the total amount of carbon dioxide removed from the regeneration tower, unit: Nm 3 / h; P 总 Indicates the operating pressure of the regeneration tower, unit: kpa.

5. A method for controlling parameters of a regeneration tower in a hydrogen-rich carbon cycle oxygen blast furnace decarbonization system according to claim 4, characterized in that: Different operating temperatures of the regeneration tower correspond to different P 水蒸汽 , the operating temperature in the normal production process is 60 ~ 90 ℃, the corresponding P 水蒸汽 It is 19.933~70.121kpa.

6. The method for controlling the parameters of the regeneration tower of the hydrogen-rich carbon cycle oxygen blast furnace decarbonization system according to claim 1 is characterized in that: In S3, the empty tower gas stripping flow rate of the regeneration tower liquid flooding point is calculated by the regeneration tower full load parameter, and the calculation formula of the empty tower gas stripping flow rate of the regeneration tower liquid flooding point is as follows: Where: θ 液泛点 Indicates the empty tower gas lift velocity at the regeneration tower liquid flooding point, unit: m / s; V 液泛点 Indicates the volume of the regeneration gas-liquid flooding point, unit: m 3 / h; S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ; The above V 液泛点 The calculation formula is as follows: Where: V 液泛点 Indicates the volume of the regeneration gas-liquid flooding point, unit: m 3 / h;m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; ρ 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ; The calculation formula of the above S is as follows: S＝πr 2 Where: S represents the cross-sectional area of ​​the regeneration tower, unit: m 2 ; r represents the radius of the cross-section circle, unit: m; π represents pi, the value is 3.

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7. A method for controlling parameters of a regeneration tower in a hydrogen-rich carbon cycle oxygen blast furnace decarbonization system according to claim 6, characterized in that: The m 总 The calculation formula is as follows: Where: m 总 Indicates the total gas phase load in the regeneration tower, unit: kg / h; Indicates the gas phase load of carbon dioxide in the regeneration tower, unit: kg / h; m 水蒸汽 Indicates the water vapor gas phase load in the regeneration tower, unit: kg / h; Indicates the total amount of carbon dioxide removed at the flooding point of the regeneration tower, unit: Nm 3 / h; represents the relative molecular mass of carbon dioxide, =44 g / mol; V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; M 水蒸汽 Indicates the relative molecular mass of water vapor, M 水蒸汽 =18 g / mol; V m Indicates the molar volume of gas under standard conditions, V m =22.4L / mol; The 总 The calculation formula is as follows: Where: 总 Indicates the total gas phase density in the regeneration tower, unit: kg / m 3 ; Indicates the carbon dioxide density in the regeneration tower, unit: kg / m 3 ; ρ 水蒸汽 Indicates the water vapor density in the regeneration tower, unit: kg / m 3 ;P 总 Indicates the operating pressure of the regeneration tower, unit: kpa; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, unit: kpa; Indicates the relative molecular mass of carbon dioxide in the regeneration tower, R represents the molar gas constant, R = 8.314 J / (mol·K); T 液泛操作 Indicates the operating temperature of the regeneration tower liquid flooding point, unit: ℃; T 标准 Indicates standard temperature, T 标准 =273.15K;M 水蒸汽 Represents the relative molecular mass of water vapor in the regeneration tower, M 水蒸汽 =18 g / mol.

8. The method for controlling the parameters of the regeneration tower of the hydrogen-rich carbon cycle oxygen blast furnace decarbonization system according to claim 7 is characterized in that: The V 水蒸汽 The calculation formula is as follows: Where: V 水蒸汽 Indicates the volume of water vapor in the regeneration tower, unit: Nm 3 / h; P 水蒸汽 Indicates the water vapor pressure in the regeneration tower, P 水蒸汽 =57.818kpa; Indicates the total amount of carbon dioxide removed at the flooding point of the regeneration tower, unit: Nm 3 / h; P 液泛总 Indicates the operating pressure of the regeneration tower liquid flooding point, unit: kpa.

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