Blast furnace gas desulfurization device and control system and control method thereof

Abstract

The invention discloses a blast furnace gas desulfurization device as well as a control system and a control method thereof. The control system comprises a gas detection module, a liquid detection module, an equipment detection module and a control analysis storage module, the gas detection module is used for detecting gas flow at a plurality of first set positions, gas pressure at a plurality of second set positions, gas temperature at a plurality of third set positions and output gas sulfur content in the blast furnace gas desulfurization device; the liquid detection module is used for detecting the liquid flow at a plurality of fourth set positions, the liquid pressure at a plurality of fifth set positions, the liquid temperature at a plurality of sixth set positions and the PH value of the output liquid in the blast furnace gas desulfurization device; the equipment detection module is used for detecting the operation frequency of a plurality of rotating units and the valve opening degree of a plurality of valve units in the blast furnace gas desulfurization device. The method not only can ensure that the emission of the blast furnace gas desulfurization device meets the set requirements, but also can reduce the operation cost of the blast furnace gas desulfurization device.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace gas, and in particular to a blast furnace gas desulfurization device and a control system and a control method thereof. Background Art

[0002] Blast furnace gas is a combustible gas produced as a byproduct of the blast furnace production process. It has a large output and a wide range of uses and can be used as fuel. Unpurified blast furnace gas also contains a large amount of dust and sulfides. Its sulfides are mainly divided into two categories: organic sulfur and inorganic sulfur, with organic sulfur accounting for a higher proportion than inorganic sulfur. The main components of organic sulfur are carbonyl sulfide, carbon disulfide, thioether mercaptan, thiophene, etc., with carbonyl sulfide being the main component; the main components of inorganic sulfur are hydrogen sulfide, sulfur dioxide, etc. The sulfur dioxide emissions in the flue gas of untreated blast furnace gas after combustion exceed the standard. Therefore, before burning blast furnace gas for power generation, it needs to be purified by a blast furnace gas desulfurization device to remove dust and sulfides carried in the gas.

[0003] However, the existing blast furnace gas desulfurization equipment has problems such as substandard desulfurization and high desulfurization cost. Summary of the invention

[0004] The present invention provides a blast furnace gas desulfurization device and a control system and a control method thereof, which can ensure that the emission of the blast furnace gas desulfurization device meets the set requirements and can also reduce the operation cost of the blast furnace gas desulfurization device.

[0005] According to one aspect of the present invention, a control system for a blast furnace gas desulfurization device is provided, the control system comprising: a gas detection module, a liquid detection module, an equipment detection module and a control analysis storage module;

[0006] The gas detection module is used to detect the gas flow at multiple first setting positions, the gas pressure at multiple second setting positions, the gas temperature at multiple third setting positions and the output gas sulfur content in the blast furnace gas desulfurization device;

[0007] The liquid detection module is used to detect the liquid flow at multiple fourth setting positions, the liquid pressure at multiple fifth setting positions, the liquid temperature at multiple sixth setting positions and the output liquid pH value in the blast furnace gas desulfurization device;

[0008] The equipment detection module is used to detect the operating frequency of multiple rotating units and the valve opening of multiple valve units in the blast furnace gas desulfurization device;

[0009] The control, analysis and storage module is used to adjust the operating frequencies of multiple rotating units and / or the valve openings of multiple valve units according to the first data group detected by the gas detection module, the second data group detected by the liquid detection module and the third data group detected by the equipment detection module, so that the sulfur content, gas flow rate and liquid pH value output by the blast furnace gas desulfurization device are all within their corresponding set ranges, wherein the first data group includes the gas flow rate, gas sulfur content, gas pressure and gas temperature detected multiple times by the gas detection module; the second data group includes the liquid pH value, liquid flow rate, liquid pressure and liquid temperature detected multiple times by the liquid detection module; the third data group includes the operating frequencies of multiple rotating units and the valve openings of multiple valve units detected multiple times by the equipment detection module.

[0010] Optionally, the blast furnace gas desulfurization device includes an air inlet pipe, a pretreatment tower, a first connecting pipe, a gas compressor, a second connecting pipe, a gas heater, a third connecting pipe, a hydrolysis tower, a fourth connecting pipe, a gas cooler, a fifth connecting pipe, an inorganic sulfur adsorption tower and an air outlet pipe connected in sequence, and also includes a liquid pump unit, a water supply pipe, an alkali supply pipe and a water outlet pipe connected to the pretreatment tower, a steam inlet valve unit, a gas heater steam inlet pipe and a gas heater steam outlet pipe connected to the gas heater, a cooling water pump, a cooling water regulating valve unit, a condensate inlet pipe and a condensate outlet pipe connected to the gas cooler, and also includes a bypass regulating valve connected between the second connecting pipe and the air outlet pipe;

[0011] The gas detection module includes a gas flow detection unit, a gas pressure detection unit, a gas temperature detection unit and a gas sulfur detection unit; the liquid detection module includes a liquid flow detection unit, a liquid pressure detection unit, a liquid temperature detection unit and a liquid pH value detection unit; the equipment detection module includes a rotating equipment detection unit and a valve detection unit;

[0012] The gas flow detection unit is used to detect the gas flow in the gas outlet pipe and the steam flow in the steam inlet pipe of the gas heater;

[0013] The gas pressure detection unit is used to detect a first pressure in the air inlet pipe, a second pressure in the first connecting pipe, a third pressure in the second connecting pipe, a fourth pressure in the air outlet pipe and a fifth pressure in the steam inlet pipe of the gas heater;

[0014] The gas temperature detection unit is used to detect a first temperature in the second connecting pipe, a second temperature in the third connecting pipe, a third temperature in the fourth connecting pipe, a fourth temperature in the fifth connecting pipe, a fifth temperature in the steam inlet pipe of the gas heater, and a sixth temperature in the steam outlet pipe of the gas heater;

[0015] The coal gas sulfur content detection unit is used to detect the first organic sulfur content in the intake pipe, the first inorganic sulfur content in the intake pipe, the second organic sulfur content in the outlet pipe, and the second inorganic sulfur content in the outlet pipe;

[0016] The liquid flow detection unit is used to detect the water supply flow in the water supply pipe, the alkali solution flow in the alkali supply pipe, and the condensed water flow in the condensed water inlet pipe;

[0017] The liquid pressure detection unit is used to detect the water supply pressure in the water supply pipe, the alkali solution pressure in the alkali supply pipe, and the condensed water pressure in the condensed water inlet pipe;

[0018] The liquid temperature detection unit is used to detect the seventh temperature in the condensed water inlet pipe and the eighth temperature in the condensed water outlet pipe;

[0019] The liquid pH value detection unit is used to detect the pH value of the liquid in the water outlet pipe connected to the bottom of the pretreatment tower;

[0020] The valve detection unit is used to detect the first valve opening of the steam inlet valve unit, the second valve opening of the cooling water regulating valve unit and the third valve opening of the bypass regulating valve;

[0021] The rotating device detection unit is used to detect a first operating frequency of the liquid pump unit, a second operating frequency of the gas compressor, and a third operating frequency of the cooling water pump.

[0022] Optionally, the control analysis storage module includes a control unit, a data analysis unit and a data storage unit;

[0023] The control unit is used to send a first signal to the data analysis unit when the fourth pressure is higher than a first set threshold or lower than a second set threshold, to send a second signal to the data analysis unit when the liquid pH value is higher than a third set threshold or lower than a fourth set threshold, to send a third signal to the data analysis unit when the second organic sulfur content is higher than a fifth set threshold or lower than a sixth set threshold, to send a fourth signal to the data analysis unit when the second inorganic sulfur content is higher than a seventh set threshold or lower than an eighth set threshold, to send a fifth signal to the data analysis unit when the total sulfur content is higher than a ninth set threshold or lower than a tenth set threshold, and to adjust the second operating frequency according to the first control instruction so that The fourth pressure is between the first set threshold and the second set threshold, the first operating frequency is adjusted according to the second control instruction so that the liquid pH value is between the third set threshold and the fourth set threshold, the first valve opening is adjusted according to the third control instruction so that the second organic sulfur content is between the fifth set threshold and the sixth set threshold, the second valve opening is adjusted according to the fourth control instruction so that the second inorganic sulfur content is between the seventh set threshold and the eighth set threshold, and the third valve opening is adjusted according to the fifth control instruction so that the total sulfur content is between the ninth set threshold and the tenth set threshold; wherein the total sulfur content is the sum of the second organic sulfur content and the second inorganic sulfur content;

[0024] The data storage unit is used to store the first data group, the second data group and the third data group;

[0025] The data analysis unit is used to establish a calculation model based on the data stored in the data storage unit. The data analysis unit is also used to determine the first changed operating frequency of the gas compressor based on the first signal and the calculation model, and send the first control instruction to the control unit; to determine the second changed operating frequency of the liquid pump unit based on the second signal and the calculation model, and send the second control instruction to the control unit; to determine the first changed opening of the steam inlet valve unit based on the third signal and the calculation model, and send the third control instruction to the control unit; to determine the second changed opening of the cooling water regulating valve unit based on the fourth signal and the calculation model, and send the fourth control instruction to the control unit; to determine the third changed opening of the bypass regulating valve based on the fifth signal and the calculation model, and send the fifth control instruction to the control unit.

[0026] Optionally, the calculation model includes a load control calculation sub-model, a hydrogen chloride content calculation sub-model, an organic sulfur content calculation sub-model, an inorganic sulfur content calculation sub-model and a total sulfur content calculation sub-model;

[0027] The load control calculation sub-model includes gas flow, gas temperature, pipe pressure and the second operating frequency influencing factor;

[0028] The sub-model for calculating the hydrogen chloride content includes factors affecting gas flow, water supply flow, alkali solution flow, liquid pH value and the first operating frequency;

[0029] The organic sulfur content calculation sub-model includes coal gas flow, steam flow, coal gas temperature, first valve opening, first organic sulfur content and second organic sulfur content influencing factors, and also includes steam temperature or steam pressure influencing factors;

[0030] The inorganic sulfur content calculation sub-model includes coal gas flow, condensed water flow, coal gas temperature, a first inorganic sulfur content and a second inorganic sulfur content influencing factor, a condensed water temperature or condensed water pressure influencing factor, and a third operating frequency or a second valve opening influencing factor;

[0031] The total sulfur content calculation sub-model includes the gas flow rate, the third valve opening and the total sulfur content influencing factor;

[0032] The data analysis unit is specifically used to determine the first change operating frequency of the gas compressor according to the first signal and the load control calculation submodel; to determine the second change operating frequency of the liquid pump unit according to the second signal and the hydrogen chloride content calculation submodel; to determine the first change opening of the steam inlet valve unit according to the third signal and the organic sulfur content calculation submodel; to determine the second change opening of the cooling water regulating valve unit according to the fourth signal and the inorganic sulfur content calculation submodel; and to determine the third change opening of the bypass regulating valve according to the fifth signal and the total sulfur content calculation submodel.

[0033] Optionally, the data analysis unit is also used to update the load control calculation sub-model, the hydrogen chloride content calculation sub-model, the organic sulfur content calculation sub-model, the inorganic sulfur content calculation sub-model and the total sulfur content calculation sub-model according to the data information currently detected by the gas detection module, the data information currently detected by the liquid detection module and the data information currently detected by the equipment detection module.

[0034] Optionally, the liquid pump unit includes a water pump unit and an alkali liquid pump unit;

[0035] The water pump unit includes at least one water pump; the alkali liquid pump unit includes at least one alkali liquid pump;

[0036] The control unit is also used to adjust the pH value of the liquid by reducing or increasing the operating frequency of the alkali liquid pump when the operating frequencies of all the water pumps in the water pump unit reach the maximum operating frequency of the water pump, and is also used to adjust the pH value of the liquid by reducing or increasing the operating frequency of the water pump when the operating frequencies of all the alkali liquid pumps in the alkali liquid pump unit reach the maximum operating frequency of the alkali liquid pump.

[0037] Optionally, the control system provided in this embodiment further includes an alarm module;

[0038] The control unit is also used to control the alarm module to issue a first alarm prompt when the second operating frequency is higher than the first upper limit or lower than the first lower limit; it is also used to control the alarm module to issue a second alarm prompt when the operating frequency of at least one of the alkali liquid pumps is higher than the second upper limit or lower than the second lower limit; it is also used to control the alarm module to issue a third alarm prompt when the operating frequency of at least one of the water pumps is higher than the third upper limit or lower than the third lower limit; the control unit is also used to control the alarm module to issue a fourth alarm prompt when the first valve opening of the steam inlet valve unit is higher than the fourth upper limit or lower than the fourth lower limit.

[0039] Optionally, the control system provided in this embodiment further includes a display module;

[0040] The display module is connected to the control unit, and is used to display the real-time information of the data stored in the data storage unit read by the control unit.

[0041] According to another aspect of the present invention, a control method for a blast furnace gas desulfurization device is provided, and the control method is applied to the control system provided in any embodiment of the present invention;

[0042] The control method comprises:

[0043] The gas detection module detects the gas flow at multiple first setting positions, the gas pressure at multiple second setting positions, the gas temperature at multiple third setting positions and the sulfur content of the output gas in the blast furnace gas desulfurization device;

[0044] The liquid detection module detects the liquid flow at a plurality of fourth setting positions, the liquid pressure at a plurality of fifth setting positions, the liquid temperature at a plurality of sixth setting positions and the output liquid pH value in the blast furnace gas desulfurization device;

[0045] The equipment detection module detects the operating frequencies of multiple rotating units and the valve openings of multiple valve units in the blast furnace gas desulfurization device;

[0046] The control, analysis and storage module adjusts the operating frequencies of multiple rotating units and / or the valve openings of multiple valve units according to the first data group detected by the gas detection module, the second data group detected by the liquid detection module and the third data group detected by the equipment detection module, so that the sulfur content, gas flow rate and liquid pH value output by the blast furnace gas desulfurization device are all within their corresponding set ranges, wherein the first data group includes the gas flow rate, gas sulfur content, gas pressure and gas temperature detected multiple times by the gas detection module; the second data group includes the liquid pH value, liquid flow rate, liquid pressure and liquid temperature detected multiple times by the liquid detection module; and the third data group includes the operating frequencies of multiple rotating units and the valve openings of multiple valve units detected multiple times by the equipment detection module.

[0047] According to another aspect of the present invention, a blast furnace gas desulfurization device is provided. The blast furnace gas desulfurization device includes the control system of the blast furnace gas desulfurization device provided by any embodiment of the present invention.

[0048] An embodiment of the present invention provides a control system for a blast furnace gas desulfurization device, which includes a gas detection module, a liquid detection module, an equipment detection module, and a control analysis storage module. The gas detection module is used to detect the gas flow, gas pressure, gas temperature, and gas sulfur content at multiple set positions in the blast furnace gas desulfurization device. The liquid detection module is used to detect the liquid flow, liquid pressure, liquid temperature, and output liquid pH value at multiple set positions in the blast furnace gas desulfurization device. The equipment detection module is used to detect the operating frequency of multiple rotating units and the valve opening of multiple valve units in the blast furnace gas desulfurization device. The control analysis storage module is used to adjust the operating frequency of multiple rotating units and / or the valve opening of multiple valve units according to the data detected by the gas detection module, the data detected by the liquid detection module, and the data detected by the equipment detection module, so that the sulfur content, gas flow rate, and liquid pH value output by the blast furnace gas desulfurization device are all within their corresponding set ranges, avoiding the sulfur content output by the blast furnace gas desulfurization device being too high or too low, the gas flow rate being too high or too low, and the liquid pH value being too high or too low, thereby effectively reducing the consumption of steam, cooling water, alkali solution and other power media, extending the service life of the hydrolyzing agent and the adsorbent, and ensuring that the emission meets the standard. In summary, the control system of the blast furnace gas desulfurization device provided in this embodiment can not only ensure that the emission of the blast furnace gas desulfurization device meets the set requirements, but also reduce the operating cost of the blast furnace gas desulfurization device.

[0049] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 is a schematic structural diagram of a blast furnace gas desulfurization device provided according to an embodiment of the present invention;

[0052] Figure 2 is a structural schematic diagram of a control system of a blast furnace gas desulfurization device provided according to an embodiment of the present invention;

[0053] Figure 3 is a structural schematic diagram of a control system of another blast furnace gas desulfurization device provided according to an embodiment of the present invention;

[0054] Figure 4 It is a structural schematic diagram of a control system of a blast furnace gas desulfurization device provided by an embodiment of the present invention being applied in the blast furnace gas desulfurization device;

[0055] Figure 5 is a structural schematic diagram of a control system of another blast furnace gas desulfurization device provided according to an embodiment of the present invention;

[0056] Figure 6 It is a flow chart of a control method of a blast furnace gas desulfurization device provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] Figure 1 is a schematic diagram of the structure of a blast furnace gas desulfurization device provided according to an embodiment of the present invention, with reference to Figure 1 The blast furnace gas desulfurization device provided in this embodiment includes an inlet pipe 110, a pretreatment tower 120, a first connecting pipe 130, a gas compressor 140, a second connecting pipe 150, a gas heater 160, a third connecting pipe 170, a hydrolysis tower 180, a fourth connecting pipe 190, a gas cooler 191, a fifth connecting pipe 192, an inorganic sulfur adsorption tower 193 and an outlet pipe 194 connected in sequence. The blast furnace gas desulfurization device also includes a liquid pump unit 111, a water supply pipe 112, an alkali supply pipe 113 and a water outlet pipe 114 connected to the pretreatment tower 120. The blast furnace gas desulfurization device further includes a steam inlet valve unit 161 connected to the gas heater 160, a gas heater steam inlet pipe 162 and a gas heater steam outlet pipe 163, a cooling water pump 195 connected to the gas cooler 191, a cooling water regulating valve unit 196, a condensed water inlet pipe 197 and a condensed water outlet pipe 198, and a bypass regulating valve 151 connected between the second connecting pipe 150 and the gas outlet pipe 194. The blast furnace gas desulfurization device further includes a sewage pool 123 connected to the outlet of the pretreatment tower 120, a residual gas recovery device 124 connected to the outlet of the gas heater 160, and a water cooling tower 125 connected to the gas cooler 191.

[0060] The liquid pump unit 111 includes a water pump unit 121 and an alkali liquid pump unit 122. The water pump unit 121 includes at least one water pump, and the alkali liquid pump unit 122 includes at least one alkali liquid pump. The blast furnace gas desulfurization device provided in this embodiment can use a hydrolysis method for desulfurization. The hydrolysis method desulfurization mainly includes a dechlorination process, a hydrolysis process and an adsorption process.

[0061] Figure 2 is a schematic diagram of the structure of a control system of a blast furnace gas desulfurization device provided according to an embodiment of the present invention, with reference to Figure 2The control system of the blast furnace gas desulfurization device provided in this embodiment includes: a gas detection module 210, a liquid detection module 220, an equipment detection module 230 and a control analysis storage module 240; the gas detection module 210 is used to detect the gas flow rate at multiple first setting positions, the gas pressure at multiple second setting positions, the gas temperature at multiple third setting positions and the output gas sulfur content in the blast furnace gas desulfurization device; the liquid detection module 220 is used to detect the liquid flow rate at multiple fourth setting positions, the liquid pressure at multiple fifth setting positions, the liquid temperature at multiple sixth setting positions and the output liquid pH value in the blast furnace gas desulfurization device; the equipment detection module 230 is used to detect the operating frequency of multiple rotating units and the valve opening of multiple valve units in the blast furnace gas desulfurization device; the control The control analysis and storage module 240 is used to adjust the operating frequencies of multiple rotating units and / or the valve openings of multiple valve units according to the first data group detected by the gas detection module 210, the second data group detected by the liquid detection module 220 and the third data group detected by the equipment detection module 230, so that the sulfur content, gas flow rate and liquid pH value output by the blast furnace gas desulfurization device are all within their corresponding set ranges, wherein the first data group includes the gas flow rate, gas sulfur content, gas pressure and gas temperature detected multiple times by the gas detection module 210; the second data group includes the liquid pH value, liquid flow rate, liquid pressure and liquid temperature detected multiple times by the liquid detection module 220; the third data group includes the operating frequencies of multiple rotating units and the valve openings of multiple valve units detected multiple times by the equipment detection module 230.

[0062] Specifically, the specific positions of the first setting position, the second setting position, the third setting position, the fourth setting position, the fifth setting position and the sixth setting position can be set according to actual needs.

[0063] Continue to refer Figure 1 The multiple rotating units in the blast furnace gas desulfurization device may include at least one of the water pump unit 121, the alkali liquid pump unit 122, the cooling water pump 195 and the gas compressor 140, and the multiple valve units in the blast furnace gas desulfurization device may include at least one of the steam inlet valve unit 161, the cooling water regulating valve unit 196 and the bypass regulating valve 151. After the operating frequency of the rotating unit changes or the valve opening of the valve unit changes, the gas flow rate output by the blast furnace gas desulfurization device, the sulfur content in the gas and the liquid pH value will change. Among them, the sulfur content output by the blast furnace gas desulfurization device includes organic sulfur content and inorganic sulfur content.

[0064] The first data group may include the gas sulfur content, gas pressure, gas temperature and gas flow currently detected by the gas detection module 210, and may also include the gas sulfur content, gas pressure, gas temperature and gas flow previously detected by the gas detection module. The second data group may include the liquid pH value, liquid flow, liquid pressure and liquid temperature currently detected by the liquid detection module 220, and may also include the liquid pH value, liquid flow, liquid pressure and liquid temperature previously detected by the liquid detection module 220. The third data group may include the operating frequencies of multiple rotating units and the valve openings of multiple valve units currently detected by the equipment detection module 230, and may also include the operating frequencies of multiple rotating units and the valve openings of multiple valve units previously detected by the equipment detection module 230.

[0065] When the organic sulfur and / or inorganic sulfur content in the coal gas output by the blast furnace gas desulfurization device is too high, it will cause the problem of substandard emissions. When the organic sulfur and / or inorganic sulfur content in the coal gas output by the blast furnace gas desulfurization device is too low, it indicates that the desulfurization efficiency of the hydrolysis tower and / or adsorption tower in the blast furnace gas desulfurization device is high, and the consumption of steam and cooling water is high, which shortens the service life of the hydrolyzing agent and the adsorbent. When the pH value of the liquid output by the blast furnace gas desulfurization device is too high, it indicates that the operating frequency of the alkali liquid pump in the liquid pump unit 111 is too high, the efficiency of removing hydrogen chloride from the coal gas is high, and it also indicates that the consumption of alkali liquid is high; when the pH value of the liquid output by the blast furnace gas desulfurization device is too low, it indicates that the operating frequency of the liquid pump unit 111 is too low, the efficiency of removing hydrogen chloride from the coal gas is too low, and the hydrogen chloride content of the coal gas is high, which does not meet the requirements for the hydrogen chloride content in the coal gas entering the hydrolysis tower, and it is necessary to increase the operating frequency of the liquid pump unit 111.

[0066] In this embodiment, the control analysis storage module 240 stores the set range values ​​corresponding to the sulfur content output by the blast furnace gas desulfurization device, the set range values ​​corresponding to the gas flow rate, and the set range values ​​corresponding to the liquid pH value. When the control analysis storage module 240 determines that the gas flow rate is not within the corresponding set range, the liquid pH value currently detected by the liquid detection module is not within the corresponding set range, or the sulfur content currently detected by the gas detection module 210 is not within the corresponding set range, the operation frequency of multiple rotating units and / or the valve opening of multiple valve units in the blast furnace gas desulfurization device are adjusted according to the first data group, the second data group, and the third data group, so that the sulfur content, gas flow rate, and liquid pH value output by the blast furnace gas desulfurization device are all within the corresponding set range, which not only ensures that the gas output by the blast furnace gas desulfurization device meets the standards, but also prolongs the service life of the hydrolyzing agent and the adsorbent, and reduces the operating cost of the blast furnace gas desulfurization device. The control system of the blast furnace gas desulfurization device provided in this embodiment can automatically control the operating frequency of multiple rotating units and the valve opening of multiple valve units without manual operation, reducing labor costs and realizing intelligent control of the blast furnace gas desulfurization device.

[0067] The present embodiment provides a control system for a blast furnace gas desulfurization device, which includes a gas detection module, a liquid detection module, an equipment detection module, and a control analysis storage module. The gas detection module is used to detect the gas flow, gas pressure, gas temperature, and gas sulfur content at multiple set positions in the blast furnace gas desulfurization device. The liquid detection module is used to detect the liquid flow, liquid pressure, liquid temperature, and output liquid pH value at multiple set positions in the blast furnace gas desulfurization device. The equipment detection module is used to detect the operating frequency of multiple rotating units and the valve opening of multiple valve units in the blast furnace gas desulfurization device. The control analysis storage module is used to adjust the operating frequency of multiple rotating units and / or the valve opening of multiple valve units according to the data detected by the gas detection module, the data detected by the liquid detection module, and the data detected by the equipment detection module, so that the sulfur content, gas flow rate, and liquid pH value output by the blast furnace gas desulfurization device are all within their corresponding set ranges, avoiding the sulfur content output by the blast furnace gas desulfurization device being too high or too low, the gas flow rate being too high or too low, and the liquid pH value being too high or too low, thereby effectively reducing the consumption of steam, cooling water, alkali solution and other power media, extending the service life of the hydrolyzing agent and the adsorbent, and ensuring that the emission meets the standard. In summary, the control system of the blast furnace gas desulfurization device provided in this embodiment can not only ensure that the emission of the blast furnace gas desulfurization device meets the set requirements, but also reduce the operating cost of the blast furnace gas desulfurization device.

[0068] Optional, Figure 3 is a structural schematic diagram of a control system of another blast furnace gas desulfurization device provided according to an embodiment of the present invention. Figure 4 Schematic diagram of the structure of the control system of the blast furnace gas desulfurization device provided by the embodiment of the present invention applied in the blast furnace gas desulfurization device, with reference to Figure 3 and Figure 4 The gas detection module 210 includes a gas flow detection unit 211, a gas pressure detection unit 212, a gas temperature detection unit 213 and a gas sulfur content detection unit 214; the liquid detection module 220 includes a liquid flow detection unit 221, a liquid pressure detection unit 222, a liquid temperature detection unit 223 and a liquid pH value detection unit 224; the equipment detection module 230 includes a rotating equipment detection unit 231 and a valve detection unit 232. The gas flow detection unit 211 is used to detect the gas flow V1 in the gas outlet pipe 194 and the steam flow V2 in the gas heater steam inlet pipe 162; the gas pressure detection unit 212 is used to detect the first pressure P1 in the gas inlet pipe 110, the second pressure P2 in the first connecting pipe 130, the third pressure P3 in the second connecting pipe 150, the fourth pressure P4 in the gas outlet pipe 194 and the fifth pressure P5 in the gas heater steam inlet pipe 162; the gas temperature detection unit 213 is used to detect the gas flow V1 in the second connecting pipe 150 and the steam flow V2 in the gas heater steam inlet pipe 162; the gas temperature detection unit 213 is used to detect the gas flow V2 in the second connecting pipe 150 and the steam flow V2 in the gas heater steam inlet pipe 162; the gas flow detection unit 211 is used to detect the gas flow V1 in the gas outlet pipe 194 and the steam flow V2 in the gas heater steam inlet pipe 162; the gas pressure detection unit 212 is used to detect the first pressure P1 in the gas inlet pipe 110, the second pressure P2 in the first connecting pipe 130, the third pressure P3 in the second connecting pipe 150, the fourth pressure P4 in the gas outlet pipe 194 and the fifth pressure P5 in the gas heater steam inlet pipe 162; the gas temperature detection unit 213 is used to detect the gas The first temperature T1, the second temperature T2 in the third connecting pipe 170, the third temperature T3 in the fourth connecting pipe 190, the fourth temperature T4 in the fifth connecting pipe 192, the fifth temperature T5 in the gas heater steam inlet pipe 162 and the sixth temperature T6 in the gas heater steam outlet pipe 163; the gas sulfur content detection unit 214 is used to detect the first organic sulfur content in the intake pipe 110, the first inorganic sulfur content in the intake pipe 110, the second organic sulfur content in the outlet pipe 194, the second inorganic sulfur content in the outlet pipe 194; content; the liquid flow detection unit 221 is used to detect the water supply flow Q1 in the water supply pipe 112, the alkali solution flow Q2 in the alkali supply pipe 113, and the condensed water flow Q3 in the condensed water inlet pipe 197; the liquid pressure detection unit 222 is used to detect the water supply pressure P6 in the water supply pipe 112, the alkali solution pressure P7 in the alkali supply pipe 113, and the condensed water pressure P8 in the condensed water inlet pipe 197; the liquid temperature detection unit 223 is used to detect the seventh temperature T7 in the condensed water inlet pipe 197 and the seventh temperature T8 in the condensed water outlet pipe 198 Eight temperature T8; the liquid pH value detection unit 224 is used to detect the pH value of the liquid in the water outlet pipe 114 connected to the bottom of the pretreatment tower 120; the valve detection unit 232 is used to detect the first valve opening of the steam inlet valve unit 161, the second valve opening of the cooling water regulating valve unit 196 and the third valve opening of the bypass regulating valve 151; the rotating equipment detection unit 231 is used to detect the first operating frequency of the liquid pump unit 111, the second operating frequency of the gas compressor 140 and the third operating frequency of the cooling water pump 195.

[0069] Specifically, organic sulfur may include COS and CS2. Inorganic sulfur may include H2S. The first operating frequency of the liquid pump unit 111 includes the operating frequency of each water pump in the water pump unit 121 and the operating frequency of each alkali pump in the alkali pump unit 122. The steam inlet valve unit 161 includes a steam valve 165 and a steam bypass valve 164, and the first valve opening of the steam inlet valve unit 161 includes the valve opening of the steam valve 165. The cooling water regulating valve unit 196 includes a cooling water valve 167 and a cooling water bypass valve 166. The second valve opening of the cooling water regulating valve unit 196 includes the valve opening of the cooling water valve 167 and the valve opening of the cooling water bypass valve 166. The coal gas sulfur content detection unit 214 can use a gas chromatograph to detect the sulfur content.

[0070] The gas detection module 210 in this embodiment detects the gas temperature, gas pressure, gas flow rate and gas sulfur content at multiple set positions, and the liquid detection module 220 detects the liquid temperature, liquid pressure, liquid flow rate and liquid pH value at multiple positions, so that the control, analysis and storage module 240 can more accurately adjust at least one of the first valve opening, the second valve opening, the third valve opening, the first operating frequency, the second operating frequency and the third operating frequency according to the gas detection module 210 and the liquid detection module 220 to achieve economical operation of the blast furnace gas desulfurization device.

[0071] It should be noted that the first pressure P1 refers to the pressure in the intake pipe 110, the second pressure P2 refers to the pressure in the first connecting pipe 130, and the third pressure P3 refers to the pressure in the second connecting pipe 150... Similarly, the first temperature T1 refers to the temperature in the second connecting pipe 150, the second temperature T2 refers to the temperature in the third connecting pipe 170, and the third temperature T3 refers to the temperature in the fourth connecting pipe 190...

[0072] Optional, continue to refer to Figure 3The control analysis storage module 240 includes a control unit 241, a data analysis unit 242 and a data storage unit 243; the control unit 241 is used to send a first signal to the data analysis unit 242 when the fourth pressure is higher than the first set threshold or lower than the second set threshold, and to send a second signal to the data analysis unit 242 when the liquid pH value is higher than the third set threshold or lower than the fourth set threshold, and to send a third signal to the data analysis unit 242 when the second organic sulfur content is higher than the fifth set threshold or lower than the sixth set threshold, and to send a third signal to the data analysis unit 242 when the second inorganic sulfur content is higher than the seventh set threshold or lower than the eighth set threshold. When the total sulfur content is higher than the ninth set threshold or lower than the tenth set threshold, a fourth signal is sent to the data analysis unit 242; when the total sulfur content is higher than the ninth set threshold or lower than the tenth set threshold, a fifth signal is sent to the data analysis unit 242; and ..., a fifth signal is sent to the data analysis unit 242; and when the total sulfur content is higher than the ninth set threshold or lower, a fifth signal is sent to the data analysis unit 242; and when the total sulfur content is higher than the ninth set threshold or lower, a fifth signal is sent to the data analysis unit 242; and when the total sulfur content is higher than the ninth set threshold or lower, a fifth signal is sent to the data analysis unit 242; and when the total sulfur content is higher than the ninth set threshold or lower, a fifth signal is sent to the data analysis unit 242; and when the total sulfur content is higher than the ninth set threshold or lower, a fifth signal is sent to the data analysis The inorganic sulfur content is between the seventh set threshold value and the eighth set threshold value, and the third valve opening is adjusted according to the fifth control instruction so that the total sulfur content is between the ninth set threshold value and the tenth set threshold value; wherein the total sulfur content is the sum of the second organic sulfur content and the second inorganic sulfur content; the data storage unit 243 is used to store the first data group, the second data group and the third data group; the data analysis unit 242 is used to establish a calculation model according to the data stored in the data storage unit 243, and the data analysis unit 243 is also used to determine the first change operation frequency of the gas compressor 140 according to the first signal and the calculation model, and send the first signal to the control unit 241. A control instruction for determining a second changed operating frequency of the liquid pump unit 111 according to a second signal and a calculation model, and sending a second control instruction to the control unit 241; a control instruction for determining a first changed opening of the steam inlet valve unit 161 according to a third signal and a calculation model, and sending a third control instruction to the control unit 241; a control instruction for determining a second changed opening of the cooling water regulating valve unit 196 according to a fourth signal and a calculation model, and sending a fourth control instruction to the control unit 241; a control instruction for determining a third changed opening of the bypass regulating valve 151 according to a fifth signal and a calculation model, and sending a fifth control instruction to the control unit 241.

[0073] Specifically, the first set threshold is greater than the second set threshold, the third set threshold is greater than the fourth set threshold, the fifth set threshold is greater than the sixth set threshold, the seventh set threshold is greater than the eighth set threshold, and the ninth set threshold is greater than the tenth set threshold. The first change operating frequency, the second change operating frequency, the first change opening, the second change opening, and the third change opening are all positive values.

[0074] The control unit 241 is electrically connected to the gas flow detection unit 211, the gas pressure detection unit 212, the gas temperature detection unit 213 and the gas sulfur detection unit 214 in the gas detection module 210, and is also electrically connected to the liquid flow detection unit 221, the liquid pressure detection unit 222, the liquid temperature detection unit 223 and the liquid pH detection unit 224 in the liquid detection module 220, and is also electrically connected to the rotating device detection unit 231 and the valve detection unit 232 in the device detection module 230, and is also electrically connected to the data storage unit 243 and the data analysis unit 242. The data storage unit 243 is used to store the first set threshold to the tenth set threshold, and is also used to store the current data and historical data detected by the gas detection module 210 and the liquid detection module 220, as well as the data of the relevant parameters before and after the control unit 241 receives each control instruction.

[0075] When the control unit 241 detects that the fourth pressure P4 is higher than the first set threshold, the first signal includes information that the fourth pressure P4 is higher than the first set threshold. After receiving the first information, the data analysis unit 242 determines the first change operating frequency that the gas compressor 140 needs to reduce when reducing the fourth pressure to a value between the first set threshold and the second set threshold according to the calculation model and the current operating frequency of the gas compressor 140, and sends a first control instruction to the control unit 241. The first control instruction includes the first change operating frequency that needs to be reduced. When the control unit 241 receives the first control instruction, it controls the second operating frequency of the gas compressor 140 to reduce the first change operating frequency, thereby reducing the gas flow in the gas outlet pipe 194. The reduced fourth pressure can specifically be an intermediate value between the first set threshold and the second set threshold. When the fourth pressure P4 is lower than the second set threshold, the first signal includes information that the fourth pressure P4 is lower than the second set threshold. After receiving the first information, the data analysis unit 242 determines the first change operating frequency that the gas compressor 140 needs to increase when the fourth pressure is increased to a value between the first set threshold and the second set threshold according to the calculation model and the current operating frequency of the gas compressor 140, and sends a first control instruction to the control unit 241. The first control instruction includes the first change operating frequency that needs to be increased. When the control unit 241 receives the first control instruction, it controls the second operating frequency of the gas compressor 140 to increase the first change operating frequency, thereby increasing the gas flow in the gas outlet pipe 194. The increased fourth pressure can specifically be an intermediate value between the first set threshold and the second set threshold.

[0076] When the control unit 241 detects that the pH value of the liquid is higher than the third set threshold, the second signal includes information that the pH value of the liquid is higher than the third set threshold. After receiving the second information, the data analysis unit 242 determines the second change operating frequency that needs to be reduced when the pH value of the liquid is reduced to a value between the third set threshold and the fourth set threshold according to the calculation model and the current operating frequency of the alkali liquid pump, and / or determines the second change operating frequency that needs to be reduced when the pH value of the liquid is reduced to a value between the third set threshold and the fourth set threshold according to the calculation model and the current operating frequency of the water pump, and sends a second control instruction to the control unit 241, the second control instruction including the second change operating frequency. When the control unit 241 receives the second control instruction, it controls the operating frequency of the alkali liquid pump to reduce the second change operating frequency and / or controls the operating frequency of the water pump to reduce the second change operating frequency, thereby reducing the pH value of the liquid to meet the requirement for the hydrogen chloride content in the coal gas entering the hydrolysis tower. When the pH value of the liquid is lower than the fourth set threshold, the second signal includes information that the pH value of the liquid is lower than the fourth set threshold. After receiving the second information, the data analysis unit 242 determines the second change operating frequency that the alkali liquid pump needs to increase when the pH value of the liquid is increased to a value between the third set threshold and the fourth set threshold according to the calculation model and the current operating frequency of the alkali liquid pump, and / or determines the second change operating frequency that the water pump needs to increase when the pH value of the liquid is increased to a value between the third set threshold and the fourth set threshold according to the calculation model and the current operating frequency of the water pump, and sends a second control instruction to the control unit 241, the second control instruction includes the second change operating frequency. When the control unit 241 receives the second control instruction, it controls the operating frequency of the alkali liquid pump to increase the second change operating frequency and / or controls the operating frequency of the water pump to increase the second change operating frequency, thereby increasing the pH value of the liquid. The changed pH value of the liquid can specifically be an intermediate value between the third set threshold and the fourth set threshold.

[0077] When the control unit 241 detects that the second organic sulfur content is higher than the fifth set threshold and the second inorganic sulfur content is between the seventh set threshold and the eighth set threshold, the third signal includes information that the second organic sulfur content is higher than the fifth set threshold. After receiving the third information, the data analysis unit 242 determines the first variable opening that needs to be increased by the steam inlet valve unit 161 when the second organic sulfur content is reduced to between the fifth set threshold and the sixth set threshold based on the calculation model and the current first valve opening of the steam inlet valve unit 161, and sends a third control instruction to the control unit 241, the third control instruction includes the first variable opening that needs to be increased. When the control unit 241 receives the third control instruction, it controls the first valve opening of the steam inlet valve unit 161 to increase the first variable opening, thereby increasing the steam flow rate V2, increasing the second temperature T2 before entering the hydrolysis tower, improving the reaction efficiency of the hydrolysis tower, and reducing the second organic sulfur content. When the second organic sulfur content is lower than the sixth set threshold, and the second inorganic sulfur content is between the seventh set threshold and the eighth set threshold, the third signal includes information that the second organic sulfur content is lower than the sixth set threshold. After receiving the third information, the data analysis unit 242 determines the first change opening required to be reduced by the steam inlet valve unit 161 when the second organic sulfur content is increased to between the fifth set threshold and the sixth set threshold according to the calculation model and the current first valve opening of the steam inlet valve unit 161, and sends a third control instruction to the control unit 241, the third control instruction includes the first change opening required to be reduced, and when the control unit 241 receives the third control instruction, it controls the first valve opening of the steam inlet valve unit 161 to reduce the first change opening, thereby reducing the steam flow V2, reducing the second temperature T2 before entering the hydrolysis tower, reducing the reaction efficiency of the hydrolysis tower, reducing the consumption of steam, and extending the service life of the hydrolysis agent. The changed second organic sulfur content can be specifically the middle value between the fifth set threshold and the sixth set threshold. The changed second organic sulfur content may also be a specific value close to the fifth set threshold value, which can further reduce the reaction efficiency of the hydrolysis tower, reduce steam consumption, and extend the service life of the hydrolysis agent.

[0078] When the control unit 241 detects that the second inorganic sulfur content is higher than the seventh set threshold and the second organic sulfur content is between the fifth set threshold and the sixth set threshold, the fourth signal includes information that the second inorganic sulfur content is higher than the seventh set threshold. After receiving the fourth information, the data analysis unit 242 determines the second variable opening required to be increased by the cooling water regulating valve unit 196 when the second inorganic sulfur content is reduced to a value between the seventh set threshold and the eighth set threshold according to the calculation model and the current second valve opening of the cooling water regulating valve unit 196, and sends a fourth control instruction to the control unit 241, the fourth control instruction including the required second variable opening to be increased. When the control unit 241 receives the fourth control instruction, it controls the second valve opening of the cooling water regulating valve unit 196 to increase the second variable opening, thereby increasing the condensed water flow Q3, reducing the fourth temperature T4 before entering the inorganic sulfur adsorption tower 194, improving the adsorption efficiency of the inorganic sulfur adsorption tower 194, and ensuring that the inorganic sulfur emission meets the standard. The cooling water volume can also be increased or decreased by adjusting the operating frequency of the cooling water pump and increasing the water supply pressure to ensure that the inorganic sulfur emission meets the standard. When the second inorganic sulfur content is lower than the eighth set threshold, and the second organic sulfur content is between the fifth set threshold and the sixth set threshold, the fourth signal includes information that the second inorganic sulfur content is lower than the eighth set threshold. After receiving the fourth information, the data analysis unit 242 determines the second change opening required to be reduced by the cooling water regulating valve unit 196 when the second inorganic sulfur content is reduced to a value between the seventh set threshold and the eighth set threshold according to the calculation model and the current second valve opening of the cooling water regulating valve unit 196, and sends a fourth control instruction to the control unit 241, the fourth control instruction includes the second change opening required to be reduced, and when the control unit 241 receives the fourth control instruction, it controls the second valve opening of the cooling water regulating valve unit 196 to reduce the second change opening, thereby reducing the condensed water flow Q3, increasing the fourth temperature T4 before entering the inorganic sulfur adsorption tower 194, reducing the reaction efficiency of the hydrolysis tower 180, reducing the consumption of cooling water, and extending the service life of the adsorbent. The changed second inorganic sulfur content can be specifically an intermediate value between the seventh set threshold and the eighth set threshold. The changed second inorganic sulfur content may also be a specific value close to the seventh set threshold value, which can further reduce the consumption of cooling water and extend the service life of the adsorbent.

[0079] When the total sulfur content is higher than the ninth set threshold, the fifth signal includes information that the second organic sulfur content is higher than the fifth set threshold and the second inorganic sulfur content is higher than the seventh set threshold. After receiving the fifth information, the data analysis unit 242 determines the third variable opening that needs to be reduced for the bypass control valve 151 when the total sulfur content is reduced to a value between the ninth set threshold and the tenth set threshold based on the calculation model and the current third valve opening of the bypass control valve 151, and sends a fifth control instruction to the control unit 241, where the fifth control instruction includes the third variable opening that needs to be reduced. When the control unit 241 receives the fifth control instruction, it controls the third valve opening of the bypass control valve 151 to reduce the third variable opening, thereby reducing the gas flow (undesulfurized gas) passing through the bypass control valve 151. When the total sulfur content is lower than the tenth set threshold, the fifth signal includes information that the second organic sulfur content is lower than the sixth set threshold and the second inorganic sulfur content is lower than the eighth set threshold. After receiving the fifth information, the data analysis unit 242 determines the third change opening required to increase the total sulfur content to a value between the ninth set threshold and the tenth set threshold according to the calculation model and the current third valve opening of the bypass regulating valve 151, and sends a fifth control instruction to the control unit 241. The fifth control instruction includes the third change opening required to be increased. When the control unit 241 receives the fifth control instruction, it controls the third valve opening of the bypass regulating valve 151 to increase the third change opening, thereby increasing the gas flow (undesulfurized gas) passing through the bypass regulating valve 151 and extending the service life of the hydrolyzing agent and the adsorbent. After the third valve opening of the bypass regulating valve 151 changes to the third change opening, the total sulfur content can be specifically the middle value between the ninth set threshold and the tenth set threshold. After the third valve opening of the bypass regulating valve 151 changes by the third changed opening, the second organic sulfur content is between the fifth set threshold and the sixth set threshold, and the second inorganic sulfur content is between the seventh set threshold and the eighth set threshold.

[0080] In summary, the control unit 241 provided in this embodiment compares the fourth pressure P4 with its corresponding set threshold at any time. When the fourth pressure P4 is higher than the first set threshold or lower than the second set threshold, the control unit 241 transmits this "pressure comparison information" to the data analysis unit 242, and receives the relevant instruction information of "lowering / increasing the second operating frequency of the gas compressor" fed back by the data analysis unit 242 (referring to the first control instruction), and executes it, and automatically tracks its operation effect. The control unit 241 compares the liquid pH value at the bottom of the pretreatment tower with its corresponding set threshold at any time. When the real-time liquid pH value is higher than the third set threshold or lower than the fourth set threshold, the control unit 241 transmits this "PH value comparison information" to the data analysis unit 242 and receives the relevant instruction information of "lowering / increasing the operating frequency of the alkali liquid pump or reducing / increasing the operating frequency of the water pump" fed back by the data analysis unit 242 (referring to the second control instruction), and executes it, and automatically tracks its operation effect. When the second inorganic sulfur content meets the requirement, but the second organic sulfur content does not meet the requirement, that is, when the second organic sulfur content is higher than the set fifth threshold or lower than the sixth threshold, the control unit 241 transmits this "organic sulfur content comparison information" to the data analysis unit 242, and receives the relevant instruction information such as "add / subtract the opening of the steam inlet valve unit" fed back by the data analysis unit 242 (referring to the third control instruction), and executes it, and automatically tracks its operation effect. When the second organic sulfur content meets the requirement, but the second inorganic sulfur content does not meet the requirement, that is, when the real-time value of the second inorganic sulfur content is higher than the seventh threshold or lower than the eighth threshold, the control unit 241 transmits this "inorganic sulfur content comparison information" to the data analysis unit 242, and receives the relevant instruction information such as "add / subtract the opening of the cooling water regulating valve unit" fed back by the data analysis unit 242 (referring to the fourth control instruction), and executes it, and automatically tracks its operation effect. When neither the second inorganic sulfur content nor the second organic sulfur content meets the requirements, the control unit 241 transmits this "total sulfur content comparison information" to the data analysis unit 242, and accepts the "add / subtract the opening of the bypass regulating valve" instruction information (referring to the fifth control instruction) fed back by the data analysis unit 242, and executes it, and automatically tracks its operating effect.

[0081] The calculation model in the data analysis unit in this embodiment determines the first change operating frequency, the second change operating frequency, the first change opening, the second change opening and the third change opening, which can accurately control the gas flow, organic sulfur content, inorganic sulfur content and liquid pH value output by the blast furnace gas desulfurization device within the corresponding set range, which can not only ensure that emissions meet standards, but also reduce medium consumption and extend the service life of the hydrolyzer and adsorbent.

[0082] Optionally, the calculation model includes a load control calculation submodel, a hydrogen chloride content calculation submodel, an organic sulfur content calculation submodel, an inorganic sulfur content calculation submodel and a total sulfur content calculation submodel; the load control calculation submodel includes gas flow, gas temperature, pipe pressure and a second operating frequency influencing factor; the hydrogen chloride content calculation submodel includes gas flow, water supply flow, alkali solution flow, liquid pH value and a first operating frequency influencing factor; the organic sulfur content calculation submodel includes gas flow, steam flow, gas temperature, first valve opening, first organic sulfur content and a second organic sulfur content influencing factor, and also includes a steam temperature or steam pressure influencing factor; the inorganic sulfur content calculation submodel includes gas flow, condensate flow, gas temperature, first inorganic sulfur content and a second inorganic sulfur content influencing factor Factors also include condensate temperature or condensate pressure influencing factors, and also include a third operating frequency or a second valve opening influencing factor; the total sulfur content calculation submodel includes gas flow, the third valve opening and the total sulfur content influencing factor; the data analysis unit is specifically used to determine the first change operating frequency of the gas compressor according to the first signal and the load control calculation submodel; to determine the second change operating frequency of the liquid pump unit according to the second signal and the hydrogen chloride content calculation submodel; to determine the first change opening of the steam inlet valve unit according to the third signal and the organic sulfur content calculation submodel; to determine the second change opening of the cooling water regulating valve unit according to the fourth signal and the inorganic sulfur content calculation submodel; to determine the third change opening of the bypass regulating valve according to the fifth signal and the total sulfur content calculation submodel.

[0083] Specifically, the gas temperature includes a first temperature T1, a second temperature T2, a third temperature T3 and a fourth temperature T4. The pressure in the pipe includes a first pressure P1, a second pressure P2, a third pressure P3 and a fourth pressure P4. The steam temperature includes a fifth temperature T5 and a sixth temperature T6. The steam pressure includes a fifth pressure P5. The condensed water temperature includes a seventh temperature T7 and an eighth temperature T8. The load control calculation submodel, the hydrogen chloride content calculation submodel, the organic sulfur content calculation submodel, the inorganic sulfur content calculation submodel and the total sulfur content calculation submodel provided in this embodiment all include a variety of key influencing factors. The first change operation frequency determined by the load control calculation submodel, the second change operation frequency determined by the hydrogen chloride content calculation submodel, the first change opening determined by the organic sulfur content calculation submodel, the second change opening determined by the inorganic sulfur content calculation submodel and the third change opening determined by the total sulfur content calculation submodel are more accurate, so that the sulfur content emission can be better guaranteed to meet the standard, and the medium consumption can be further reduced, and the service life of the hydrolyzing agent and the adsorbent can be extended.

[0084] Optionally, the control unit is also used to send a sixth signal to the data analysis unit when the second temperature is greater than the eleventh set threshold or less than the twelfth set threshold, and to send a sixth signal to the data analysis unit when the fourth temperature is greater than the thirteenth set threshold or less than the fourteenth set threshold. It is also used to adjust the first valve opening of the steam inlet valve unit according to the sixth control instruction so that the second temperature is between the eleventh set threshold and the twelfth set threshold, and to adjust the second valve opening of the cooling water regulating valve unit according to the seventh control instruction so that the fourth temperature is between the thirteenth set threshold and the fourteenth set threshold; the data analysis unit is also used to determine the fourth change opening of the steam inlet valve unit according to the sixth signal and the organic sulfur content calculation sub-model, and send a sixth control instruction to the control unit, and to determine the fifth change opening of the cooling water regulating valve unit according to the seventh signal and the inorganic sulfur content calculation sub-model and send a seventh control instruction to the control unit.

[0085] Specifically, the control unit compares the second temperature T2 in front of the hydrolysis tower with the threshold value set therein at any time. When the real-time value is higher than the set upper threshold value or lower than the set lower threshold value, the control unit transmits this "gas comparison information" to the data analysis unit, and receives the relevant instruction information such as "subtract / add the valve opening value of the steam inlet valve unit" fed back by the data unit, and executes it, and automatically tracks its operation effect. The control unit compares the fourth temperature T4 in front of the inorganic sulfur adsorption tower with the threshold value set therein at any time. When the real-time value is higher than the set upper threshold value or lower than the set lower threshold value, the control unit transmits this "gas comparison information" to the data analysis unit, and receives the relevant instruction information such as "add / subtract the valve opening value of the cooling water inlet regulating valve" fed back by the data unit, and executes it, and automatically tracks its operation effect.

[0086] Optionally, the data analysis unit is also used to update the load control calculation sub-model, the hydrogen chloride content calculation sub-model, the organic sulfur content calculation sub-model, the inorganic sulfur content calculation sub-model and the total sulfur content calculation sub-model according to the data information currently detected by the gas detection module, the data information currently detected by the liquid detection module and the data information currently detected by the equipment detection module.

[0087] Specifically, the data information currently detected by the gas detection module includes the current gas flow, the current steam flow, the current first pressure to the current fifth pressure, the current first temperature to the current sixth temperature, the current first organic sulfur content, the current first inorganic sulfur content, the current second organic sulfur content, and the current second inorganic sulfur content.

[0088] The data information currently detected by the liquid detection module includes the current water supply flow, the current alkali solution flow, the current condensate water flow, the current water supply pressure, the current alkali solution pressure, the current condensate water pressure, the current seventh temperature, the current eighth temperature and the current liquid pH value.

[0089] The data information currently detected by the equipment detection module includes the current first valve opening to the third valve opening, and the current first operating frequency to the third operating frequency.

[0090] The data analysis unit refers to reading the historical operation data of the data storage unit, automatically analyzing and building a calculation model. The calculation model has the function of automatic learning, and continuously improving the calculation model according to the data information currently detected by the gas detection module, the data information currently detected by the liquid detection module and the data information currently detected by the equipment detection module, so as to accurately determine the first change operation frequency, the second change operation frequency, the first change opening, the second change opening and the third change opening, further ensuring that the sulfur content emission output by the blast furnace gas desulfurization device meets the emission standards, and can also further reduce the medium consumption and extend the service life of the hydrolyzing agent and the adsorbent.

[0091] Optionally, the liquid pump unit includes a water pump unit and an alkali liquid pump unit; the water pump unit includes at least one water pump; the alkali liquid pump unit includes at least one alkali liquid pump; the control unit is also used to adjust the pH value of the liquid by reducing or increasing the operating frequency of the alkali liquid pump when the operating frequency of all water pumps in the water pump unit reaches the maximum operating frequency of the water pump, and is also used to adjust the pH value of the liquid by reducing or increasing the operating frequency of the water pump when the operating frequency of all alkali liquid pumps in the alkali liquid pump unit reaches the maximum operating frequency of the alkali liquid pump.

[0092] Specifically, the control unit is used to adjust the operating frequency of the water pump of the pretreatment tower and increase the water supply when the setting requirement of the liquid pH value cannot be achieved by increasing the number of alkali solution pumps, thereby achieving the effect of reducing the liquid pH value. Similarly, the control unit is used to adjust the operating frequency of the alkali solution pump of the pretreatment tower and reduce the alkali solution supply when the setting requirement of the liquid pH value cannot be achieved by increasing the number of water pumps, thereby achieving the effect of increasing the liquid pH value.

[0093] Optional, Figure 5 is a schematic diagram of the structure of a control system of another blast furnace gas desulfurization device provided according to an embodiment of the present invention, with reference to Figure 5The control system of the blast furnace gas desulfurization device provided in this embodiment also includes an alarm module 250; the control unit 241 is also used to control the alarm module 250 to issue a first alarm prompt when the second operating frequency is higher than the first upper limit value or lower than the first lower limit value; it is also used to control the alarm module 250 to issue a second alarm prompt when the operating frequency of at least one alkali liquid pump is higher than the second upper limit value or lower than the second lower limit value; it is also used to control the alarm module 250 to issue a third alarm prompt when the operating frequency of at least one water pump is higher than the third upper limit value or lower than the third lower limit value; the control unit 241 is also used to control the alarm module 250 to issue a fourth alarm prompt when the first valve opening of the steam inlet valve unit is higher than the fourth upper limit value or lower than the fourth lower limit value.

[0094] Specifically, when the second operating frequency of the gas compressor is higher than the first upper limit, the alarm module 250 issues a first alarm prompt to remind the on-duty personnel to prepare to increase the number of gas compressors. When the second operating frequency of the gas compressor is lower than the first lower limit, the alarm module 250 issues a first alarm prompt to remind the on-duty personnel to prepare to stop the operation of the gas compressor. The alarm module 250 issues a second alarm prompt to remind the staff to prepare to stop the operation of the alkali liquid pump or increase the number of alkali liquid pumps. The alarm module 250 issues a third alarm prompt to remind the staff to prepare to stop the operation of the water pump or increase the number of water pumps. The alarm module 250 issues a fourth alarm prompt, indicating that the valve opening of the steam valve has reached the limit (fully closed / fully open). The alarm module 250 issues a fourth alarm prompt to remind the staff to open or close the steam bypass valve parallel to the steam valve. Or change the steam pressure or steam temperature in the steam inlet pipe of the gas heater.

[0095] The alarm module 250 is provided in this embodiment to remind the staff to maintain the parts in the blast furnace gas desulfurization device in time to reduce unnecessary losses.

[0096] The first upper limit, the first lower limit, the second upper limit, the second lower limit, the third upper limit and the third lower limit can be set according to actual needs. The first upper limit is greater than the first lower limit, the second upper limit is greater than the second lower limit, the third upper limit is greater than the third lower limit, and the fourth upper limit is greater than the fourth lower limit.

[0097] Optional, continue to refer to Figure 5 The control system of the blast furnace gas desulfurization device provided in this embodiment further includes a display module 260; the display module 260 is connected to the control unit 241, and the display module 260 is used to display the real-time information of the data stored in the data storage unit 243 read by the control unit 241. In this way, the operating status of the control system can be checked at any time, so that the staff can ensure that the control system is controlling the operating status of the blast furnace gas desulfurization device.

[0098] Figure 6 It is a flow chart of a control method of a blast furnace gas desulfurization device provided according to an embodiment of the present invention. The control method provided in this embodiment is applied to the control system provided in any embodiment of the present invention;

[0099] refer to Figure 6 , the control method provided in this embodiment includes the following steps:

[0100] S110, the gas detection module detects the gas flow at multiple first setting positions, the gas pressure at multiple second setting positions, the gas temperature at multiple third setting positions and the output gas sulfur content in the blast furnace gas desulfurization device; the liquid detection module detects the liquid flow at multiple fourth setting positions, the liquid pressure at multiple fifth setting positions, the liquid temperature at multiple sixth setting positions and the output liquid pH value in the blast furnace gas desulfurization device; the equipment detection module detects the operating frequency of multiple rotating units and the valve opening of multiple valve units in the blast furnace gas desulfurization device.

[0101] S120. The control, analysis and storage module adjusts the operating frequencies of multiple rotating units and / or the valve openings of multiple valve units according to the first data group detected by the gas detection module, the second data group detected by the liquid detection module and the third data group detected by the equipment detection module, so that the sulfur content, gas flow rate and liquid pH value output by the blast furnace gas desulfurization device are all within their corresponding set ranges, wherein the first data group includes the gas flow rate, gas sulfur content, gas pressure and gas temperature detected multiple times by the gas detection module; the second data group includes the liquid pH value, liquid flow rate, liquid pressure and liquid temperature detected multiple times by the liquid detection module; the third data group includes the operating frequencies of multiple rotating units and the valve openings of multiple valve units detected multiple times by the equipment detection module.

[0102] The control method of the blast furnace gas desulfurization device provided in this embodiment has corresponding beneficial effects with the control device of the blast furnace gas desulfurization device provided in any embodiment of the present invention. For technical details not detailed in this embodiment, please refer to the control device of the blast furnace gas desulfurization device provided in any embodiment of the present invention.

[0103] This embodiment also provides a blast furnace gas desulfurization device, which includes the control system of the blast furnace gas desulfurization device provided by any embodiment of the present invention.

[0104] Specifically, the control system can be embedded in the blast furnace gas desulfurization device in the prior art to obtain the blast furnace gas desulfurization device provided in this embodiment, ensuring that the blast furnace gas desulfurization device provided in this embodiment can operate economically and also ensure that emissions meet standards.

[0105] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0106] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control system for a blast furnace gas desulfurization device, characterized in that: include: Gas detection module, liquid detection module, equipment detection module and control analysis and storage module; The gas detection module is used to detect the gas flow at multiple first setting positions, the gas pressure at multiple second setting positions, the gas temperature at multiple third setting positions and the output gas sulfur content in the blast furnace gas desulfurization device; The liquid detection module is used to detect the liquid flow at multiple fourth setting positions, the liquid pressure at multiple fifth setting positions, the liquid temperature at multiple sixth setting positions and the output liquid pH value in the blast furnace gas desulfurization device; The equipment detection module is used to detect the operating frequency of multiple rotating units and the valve opening of multiple valve units in the blast furnace gas desulfurization device; The control, analysis and storage module is used to adjust the operating frequencies of multiple rotating units and / or the valve openings of multiple valve units according to the first data group detected by the gas detection module, the second data group detected by the liquid detection module and the third data group detected by the equipment detection module, so that the sulfur content, gas flow rate and liquid pH value output by the blast furnace gas desulfurization device are all within their corresponding set ranges, wherein the first data group includes the gas flow rate, gas sulfur content, gas pressure and gas temperature detected multiple times by the gas detection module; the second data group includes the liquid pH value, liquid flow rate, liquid pressure and liquid temperature detected multiple times by the liquid detection module; the third data group includes the operating frequencies of multiple rotating units and the valve openings of multiple valve units detected multiple times by the equipment detection module.

2. The control system according to claim 1, characterized in that: The blast furnace gas desulfurization device includes an air inlet pipe, a pretreatment tower, a first connecting pipe, a gas compressor, a second connecting pipe, a gas heater, a third connecting pipe, a hydrolysis tower, a fourth connecting pipe, a gas cooler, a fifth connecting pipe, an inorganic sulfur adsorption tower and an air outlet pipe connected in sequence, and also includes a liquid pump unit, a water supply pipe, an alkali supply pipe and a water outlet pipe connected to the pretreatment tower, a steam inlet valve unit, a gas heater steam inlet pipe and a gas heater steam outlet pipe connected to the gas heater, a cooling water pump, a cooling water regulating valve unit, a condensate inlet pipe and a condensate outlet pipe connected to the gas cooler, and also includes a bypass regulating valve connected between the second connecting pipe and the air outlet pipe; The gas detection module includes a gas flow detection unit, a gas pressure detection unit, a gas temperature detection unit and a gas sulfur detection unit; the liquid detection module includes a liquid flow detection unit, a liquid pressure detection unit, a liquid temperature detection unit and a liquid pH value detection unit; the equipment detection module includes a rotating equipment detection unit and a valve detection unit; The gas flow detection unit is used to detect the gas flow in the gas outlet pipe and the steam flow in the steam inlet pipe of the gas heater; The gas pressure detection unit is used to detect a first pressure in the air inlet pipe, a second pressure in the first connecting pipe, a third pressure in the second connecting pipe, a fourth pressure in the air outlet pipe and a fifth pressure in the steam inlet pipe of the gas heater; The gas temperature detection unit is used to detect a first temperature in the second connecting pipe, a second temperature in the third connecting pipe, a third temperature in the fourth connecting pipe, a fourth temperature in the fifth connecting pipe, a fifth temperature in the steam inlet pipe of the gas heater, and a sixth temperature in the steam outlet pipe of the gas heater; The coal gas sulfur content detection unit is used to detect the first organic sulfur content in the intake pipe, the first inorganic sulfur content in the intake pipe, the second organic sulfur content in the outlet pipe, and the second inorganic sulfur content in the outlet pipe; The liquid flow detection unit is used to detect the water supply flow in the water supply pipe, the alkali solution flow in the alkali supply pipe, and the condensed water flow in the condensed water inlet pipe; The liquid pressure detection unit is used to detect the water supply pressure in the water supply pipe, the alkali solution pressure in the alkali supply pipe, and the condensed water pressure in the condensed water inlet pipe; The liquid temperature detection unit is used to detect the seventh temperature in the condensed water inlet pipe and the eighth temperature in the condensed water outlet pipe; The liquid pH value detection unit is used to detect the pH value of the liquid in the water outlet pipe connected to the bottom of the pretreatment tower; The valve detection unit is used to detect the first valve opening of the steam inlet valve unit, the second valve opening of the cooling water regulating valve unit and the third valve opening of the bypass regulating valve; The rotating device detection unit is used to detect a first operating frequency of the liquid pump unit, a second operating frequency of the gas compressor, and a third operating frequency of the cooling water pump.

3. The control system according to claim 2, characterized in that: The control analysis storage module includes a control unit, a data analysis unit and a data storage unit; The control unit is used to send a first signal to the data analysis unit when the fourth pressure is higher than a first set threshold or lower than a second set threshold, to send a second signal to the data analysis unit when the liquid pH value is higher than a third set threshold or lower than a fourth set threshold, to send a third signal to the data analysis unit when the second organic sulfur content is higher than a fifth set threshold or lower than a sixth set threshold, to send a fourth signal to the data analysis unit when the second inorganic sulfur content is higher than a seventh set threshold or lower than an eighth set threshold, to send a fifth signal to the data analysis unit when the total sulfur content is higher than a ninth set threshold or lower than a tenth set threshold, and to adjust the second operating frequency according to the first control instruction so that The fourth pressure is between the first set threshold and the second set threshold, the first operating frequency is adjusted according to the second control instruction so that the liquid pH value is between the third set threshold and the fourth set threshold, the first valve opening is adjusted according to the third control instruction so that the second organic sulfur content is between the fifth set threshold and the sixth set threshold, the second valve opening is adjusted according to the fourth control instruction so that the second inorganic sulfur content is between the seventh set threshold and the eighth set threshold, and the third valve opening is adjusted according to the fifth control instruction so that the total sulfur content is between the ninth set threshold and the tenth set threshold; wherein the total sulfur content is the sum of the second organic sulfur content and the second inorganic sulfur content; The data storage unit is used to store the first data group, the second data group and the third data group; The data analysis unit is used to establish a calculation model based on the data stored in the data storage unit. The data analysis unit is also used to determine the first changed operating frequency of the gas compressor based on the first signal and the calculation model, and send the first control instruction to the control unit; to determine the second changed operating frequency of the liquid pump unit based on the second signal and the calculation model, and send the second control instruction to the control unit; to determine the first changed opening of the steam inlet valve unit based on the third signal and the calculation model, and send the third control instruction to the control unit; to determine the second changed opening of the cooling water regulating valve unit based on the fourth signal and the calculation model, and send the fourth control instruction to the control unit; to determine the third changed opening of the bypass regulating valve based on the fifth signal and the calculation model, and send the fifth control instruction to the control unit.

4. The control system according to claim 3, characterized in that: The calculation model includes a load control calculation sub-model, a hydrogen chloride content calculation sub-model, an organic sulfur content calculation sub-model, an inorganic sulfur content calculation sub-model and a total sulfur content calculation sub-model; The load control calculation sub-model includes gas flow, gas temperature, pipe pressure and the second operating frequency influencing factor; The sub-model for calculating the hydrogen chloride content includes factors affecting gas flow, water supply flow, alkali solution flow, liquid pH value and the first operating frequency; The organic sulfur content calculation sub-model includes coal gas flow, steam flow, coal gas temperature, first valve opening, first organic sulfur content and second organic sulfur content influencing factors, and also includes steam temperature or steam pressure influencing factors; The inorganic sulfur content calculation sub-model includes coal gas flow, condensed water flow, coal gas temperature, a first inorganic sulfur content and a second inorganic sulfur content influencing factor, a condensed water temperature or condensed water pressure influencing factor, and a third operating frequency or a second valve opening influencing factor; The total sulfur content calculation sub-model includes the gas flow rate, the third valve opening and the total sulfur content influencing factor; The data analysis unit is specifically used to determine the first change operating frequency of the gas compressor according to the first signal and the load control calculation submodel; to determine the second change operating frequency of the liquid pump unit according to the second signal and the hydrogen chloride content calculation submodel; to determine the first change opening of the steam inlet valve unit according to the third signal and the organic sulfur content calculation submodel; to determine the second change opening of the cooling water regulating valve unit according to the fourth signal and the inorganic sulfur content calculation submodel; and determining the third changed opening degree of the bypass regulating valve according to the fifth signal and the total sulfur content calculation sub-model.

5. The control system according to claim 4, characterized in that: The data analysis unit is also used to update the load control calculation sub-model, the hydrogen chloride content calculation sub-model, the organic sulfur content calculation sub-model, the inorganic sulfur content calculation sub-model and the total sulfur content calculation sub-model according to the data information currently detected by the gas detection module, the data information currently detected by the liquid detection module and the data information currently detected by the equipment detection module.

6. The control system according to claim 3, characterized in that: The liquid pump unit comprises a water pump unit and an alkali liquid pump unit; The water pump unit includes at least one water pump; the alkali liquid pump unit includes at least one alkali liquid pump; The control unit is also used to adjust the pH value of the liquid by reducing or increasing the operating frequency of the alkali liquid pump when the operating frequencies of all the water pumps in the water pump unit reach the maximum operating frequency of the water pump, and is also used to adjust the pH value of the liquid by reducing or increasing the operating frequency of the water pump when the operating frequencies of all the alkali liquid pumps in the alkali liquid pump unit reach the maximum operating frequency of the alkali liquid pump.

7. The control system according to claim 6, characterized in that: Also includes an alarm module; The control unit is also used to control the alarm module to issue a first alarm prompt when the second operating frequency is higher than the first upper limit or lower than the first lower limit; it is also used to control the alarm module to issue a second alarm prompt when the operating frequency of at least one of the alkali liquid pumps is higher than the second upper limit or lower than the second lower limit; it is also used to control the alarm module to issue a third alarm prompt when the operating frequency of at least one of the water pumps is higher than the third upper limit or lower than the third lower limit; the control unit is also used to control the alarm module to issue a fourth alarm prompt when the first valve opening of the steam inlet valve unit is higher than the fourth upper limit or lower than the fourth lower limit.

8. The control system according to claim 3, characterized in that: Also includes a display module; The display module is connected to the control unit, and is used to display the real-time information of the data stored in the data storage unit read by the control unit.

9. A control method for a blast furnace gas desulfurization device, characterized in that: Applicable to the control system according to any one of claims 1 to 8; The control method comprises: The gas detection module detects the gas flow at multiple first setting positions, the gas pressure at multiple second setting positions, the gas temperature at multiple third setting positions and the sulfur content of the output gas in the blast furnace gas desulfurization device; The liquid detection module detects the liquid flow at a plurality of fourth setting positions, the liquid pressure at a plurality of fifth setting positions, the liquid temperature at a plurality of sixth setting positions and the output liquid pH value in the blast furnace gas desulfurization device; The equipment detection module detects the operating frequencies of multiple rotating units and the valve openings of multiple valve units in the blast furnace gas desulfurization device; The control, analysis and storage module adjusts the operating frequencies of multiple rotating units and / or the valve openings of multiple valve units according to the first data group detected by the gas detection module, the second data group detected by the liquid detection module and the third data group detected by the equipment detection module, so that the sulfur content, gas flow rate and liquid pH value output by the blast furnace gas desulfurization device are all within their corresponding set ranges, wherein the first data group includes the gas flow rate, gas sulfur content, gas pressure and gas temperature detected multiple times by the gas detection module; the second data group includes the liquid pH value, liquid flow rate, liquid pressure and liquid temperature detected multiple times by the liquid detection module; and the third data group includes the operating frequencies of multiple rotating units and the valve openings of multiple valve units detected multiple times by the equipment detection module.

10. A blast furnace gas desulfurization device, characterized in that: A control system comprising a blast furnace gas desulfurization device as described in any one of claims 1-8.

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