CN115382522A - Blast furnace gas desulfurizer regeneration system and method - Google Patents
Blast furnace gas desulfurizer regeneration system and method Download PDFInfo
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- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
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- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
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Abstract
The invention belongs to the technical field of desulfurizer regeneration, and relates to a system and a method for regenerating a blast furnace gas desulfurizer. The heating device is adopted to heat up the regeneration carrier gas, the regeneration carrier gas is shunted through the valve, most of the regeneration carrier gas enters the heat exchanger to heat the desulfurizer in the regeneration furnace, the direct contact with the desulfurizer is avoided, the recycling is realized, a small amount of the regeneration carrier gas enters the regeneration furnace and is used for ensuring that an inert atmosphere is formed in the regeneration furnace, the desulfurizer is prevented from being oxidized and decomposed or burnt at high temperature in the regeneration process, the regeneration system is provided with the control system, and the control system is connected with the gas detection device, the temperature detection device, the valve, the heating device and the weighing device, the signals are detected and fed back in real time, and the automatic control is realized. The invention adopts automatic control and has the advantages of low energy consumption, short regeneration period, low regeneration cost, high regeneration efficiency, safety, reliability and the like.
Description
Technical Field
The invention belongs to the technical field of desulfurizer regeneration, and relates to a system and a method for regenerating a blast furnace gas desulfurizer.
Background
Compared with wet desulphurization, dry desulphurization is accepted by more and more steel enterprises due to the advantages of high removal efficiency, no waste water generation, low operation cost and the like. The dry desulfurization is mainly to remove inorganic sulfur in the coal gas by absorbing with a desulfurizing agent, mainly with H 2 The S form exists, after the desulfurizer is adsorbed and saturated, the desulfurizer is regenerated by adopting a thermal regeneration mode to achieve the effect of repeated use, and sulfur simple substances and other sulfur-containing impurities generated by the adsorption of the desulfurizer are carried out with regeneration carrier gas at high temperature. Because the existing regeneration method has short research time and low technical maturity, the following outstanding defects exist:
1) The regenerated carrier gas can not be recycled
The regeneration carrier gas is fully contacted with the desulfurizer in the regeneration process, so that a large amount of sulfur vapor and other sulfur-containing gas are contained, a complex tail gas purification system is required or the tail gas is sent to sintering, coking and other processes for treatment, and the flue gas treatment capacity of the corresponding processes is increased. Meanwhile, the regeneration carrier gas generally adopts nitrogen, belongs to an energy medium in iron and steel enterprises, needs additional payment for use, and increases the regeneration cost of the desulfurizer through phase change.
2) Undefined regeneration time
In order to ensure the desulfurization performance of the regenerated desulfurizer, the desulfurizer is fully regenerated by increasing the regeneration time, so that on one hand, the energy consumption is increased, on the other hand, the use amount of regeneration carrier gas is also increased, and meanwhile, the desulfurizer has the defects of large mass loss, more damage and the like under a long-time high-temperature environment.
3) Lack of automation of the regeneration process
At present, manual operation is mostly adopted for regeneration, relevant experience is taken as an operation basis, an automatic and standardized operation process is lacked, the labor cost is increased in a phase change mode, and meanwhile, dangerous sources such as high temperature, sulfur-containing waste gas and the like exist in the field environment, so that certain threat is brought to the personal safety of operators.
Disclosure of Invention
In view of the above, the present invention aims to provide a system and a method for regenerating a blast furnace gas desulfurizer, which are used to solve the problems of high energy consumption, large consumption of regeneration carrier gas, large loss of desulfurizer quality, high operational risk, and the like in the existing blast furnace gas desulfurizer regeneration process.
In order to achieve the purpose, the invention provides the following technical scheme: a blast furnace gas desulfurizer regeneration system comprises a regeneration furnace, a heat exchanger arranged in the regeneration furnace, a regeneration carrier gas pipeline communicated with the heat exchanger, a heating device arranged on the regeneration carrier gas pipeline, and a cooling furnace communicated with the regeneration furnace through a third valve; the cooling furnace and the regeneration furnace are internally provided with weighing devices, the regeneration furnace is connected with a temperature detection device and a gas detection device, and the third valve, the weighing devices, the temperature detection device, the gas detection device and the heating device are also communicated with a control system.
Optionally, the regeneration carrier gas pipeline is communicated with the heat exchanger through a first valve and is also communicated with the inside of the regeneration furnace through a second valve, and the first valve and the second valve are both communicated with the control system; the regeneration carrier gas pipeline is also communicated with a regeneration gas supplementing pipeline and is used for supplementing regeneration carrier gas in the regeneration furnace.
Optionally, a fourth valve and a fifth valve for discharging regeneration tail gas are sequentially arranged on a pipeline for communicating the regeneration furnace with the gas detection device; the fourth valve and the fifth valve are both communicated with the control system.
Optionally, a regeneration carrier gas is arranged in the regeneration carrier gas pipeline, the regeneration carrier gas is nitrogen or inert gases such as flue gas or argon gas which do not contain oxidizing gas, and the non-oxidizing gas comprises oxygen and N 2 O、N 2 O 4 、O 3 。
Optionally, the regeneration furnace and the heating device are connected in sequence through a regeneration carrier gas pipeline to form a loop, the heating device is used for heating the regeneration carrier gas to enable the temperature of the regeneration carrier gas to be 300-800 ℃, and an electric heating or heat exchange mode is adopted; the heat exchanger is arranged in the regenerating furnace and used for keeping the temperature in the regenerating furnace at 200-600 ℃, the heat exchanger adopts a shell-and-tube type, the regenerating carrier gas heated by a heating device is in a tube side, and the desulfurizer is in a shell side.
Optionally, the gas detection device uses a gas chromatograph, a detection tube, a portable detector or other gas detection instruments for real-time testing of the content of oxygen and sulfur-containing components in the regenerated tail gas, and the gas inlet flow of the gas detection device is controlled to be 20-100 mL/min; the gas detection device is also internally provided with an alkaline washing device which absorbs sulfur-containing components in the gas detected by the gas detection device, the alkaline washing device is a gas washing bottle and is internally filled with 0.1-30 mass percent of alkaline solution, and the alkaline solution is NaOH, KOH or Na 2 CO 3 、K 2 CO 3 One or more of the mixed solutions.
Optionally, the temperature detection device is used for detecting the temperature in the regeneration furnace in real time, and a thermocouple or a thermal resistance thermometer is adopted.
The blast furnace gas desulfurizer regeneration method applied to the blast furnace gas desulfurizer regeneration system comprises the following steps:
s1, when a gas detection device detects that the oxygen content in the regeneration tail gas is less than 5%, sending an instruction through a control system, starting a heating device, opening a first valve, controlling the temperature in a regeneration furnace to be 200-600 ℃, keeping the flow of regeneration carrier gas entering the regeneration furnace to be 20-100 mL/min, closing a fourth valve, and starting regeneration;
s2, when the gas detection device detects that the sulfur content in the regeneration tail gas is less than or equal to 10ppm, sending an instruction through the control system, closing the heating device and the first valve, stopping regeneration, fully opening the second valve and the fourth valve, and closing the fifth valve, wherein the instruction is used for cooling the desulfurizer to 50-100 ℃;
and S3, cooling the desulfurizer cooled to 50-100 ℃ into a cooling furnace to be cooled to room temperature, weighing the weight of the desulfurizer before and after regeneration by using a weighing device, and calculating to obtain the mass loss rate of the regenerated desulfurizer.
Optionally, the temperature detection device detects the temperature in the regeneration furnace in real time, keeps the temperature in the regeneration furnace at 200-600 ℃, and when the temperature in the regeneration furnace is lower than 200 ℃, the control system sends an instruction to increase the power of the heating device so that the temperature in the regeneration furnace is more than or equal to 200 ℃; when the temperature in the regenerating furnace is higher than 600 ℃, the control system sends out an instruction to reduce the power of the heating device, so that the temperature in the regenerating furnace is less than or equal to 600 ℃.
Optionally, before entering the heat exchanger, the regeneration carrier gas is controlled to be shunted through the first valve and the second valve, a small amount of the regeneration carrier gas enters the regeneration furnace, so that an inert atmosphere is formed in the regeneration furnace, the desulfurizer is prevented from being oxidized and decomposed or burnt at high temperature in the regeneration process, and the inert atmosphere means that the oxygen volume content is less than 5%; the regeneration carrier gas is used for heating the regeneration furnace on one hand, and is used for ensuring that an inert atmosphere is formed in the regeneration furnace on the other hand, so that the desulfurizing agent is prevented from being oxidized and decomposed or burnt at high temperature in the regeneration process.
The invention has the beneficial effects that:
1) According to the system and the method for regenerating the blast furnace gas desulfurizer, the desulfurizer is heated by fully utilizing the regenerative carrier gas for regeneration, and the regenerative carrier gas is repeatedly used in a mode of not contacting the desulfurizer, so that the regeneration energy consumption and the energy medium consumption are greatly reduced, and the regeneration cost is reduced;
2) According to the system and the method for regenerating the blast furnace gas desulfurizer, the gas detection device, the temperature detection device, the heating device, the weighing device and the valve are linked with the control system, so that the components and the regeneration temperature of the regenerated tail gas are detected in real time, the regeneration time and the regeneration temperature are accurately controlled, the regeneration period is obviously reduced, and the regeneration efficiency is effectively improved;
3) The system and the method for regenerating the blast furnace gas desulfurizer have the advantages that the regeneration flow of the blast furnace gas desulfurizer is centrally regulated and controlled by the control system, the automation degree is high, the errors caused by manual operation are greatly reduced, and the whole system is safe and controllable.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a system for realizing regeneration of a blast furnace gas desulfurizing agent according to the present invention.
Reference numerals: the system comprises a heating device 1, a regeneration carrier gas 2, a regeneration carrier gas pipeline 3, a heat exchanger 4, a first valve 5, a second valve 6, a gas detection device 7, a temperature detection device 8, a control system 9, regeneration tail gas 10, a regeneration furnace 11, a cooling furnace 12, a fifth valve 13, a third valve 14, a weighing device 15 and a fourth valve 16.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and the specific meaning of the terms described above will be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, a blast furnace gas desulfurizer regeneration system includes a regeneration furnace 11, a heat exchanger 4 disposed in the regeneration furnace 11, a regeneration carrier gas pipeline 3 communicated with the heat exchanger 4, a heating device 1 disposed on the regeneration carrier gas pipeline 3, and a cooling furnace 12 communicated with the regeneration furnace 11 through a third valve 14; the cooling furnace 12 and the regeneration furnace 11 are both internally provided with a weighing device 15, the regeneration furnace 11 is connected with a temperature detection device 8 and a gas detection device 7, a third valve 14, the weighing device 15, the temperature detection device 8, the gas detection device 7 and the heating device 1 are also communicated with a control system 9, a regeneration carrier gas pipeline 3 is communicated with a heat exchanger 4 through a first valve 5 and is also communicated with the regeneration furnace 11 through a second valve 6, and the first valve 5 and the second valve 6 are both communicated with the control system 9; the regeneration carrier gas pipeline 3 is also communicated with a regeneration gas supplementing pipeline and is used for supplementing the regeneration carrier gas 2 in the regeneration furnace 11, and a fourth valve 16 and a fifth valve 13 which are used for discharging the regeneration tail gas 10 are sequentially arranged on the pipeline for communicating the regeneration furnace 11 with the gas detection device 7; the fourth valve 16 and the fifth valve 13 are both communicated with the control system 9, the regeneration carrier gas pipeline 3 is internally provided with a regeneration carrier gas 2, the regeneration carrier gas 2 adopts nitrogen or flue gas without oxidizing gas or inert gases such as argon, and the like, and the non-oxidizing gas comprises oxygen and N 2 O、N 2 O 4 、O 3 The regeneration furnace 11 and the heating device 1 are connected in sequence through the regeneration carrier gas pipeline 3 to form a loop, the heating device 1 is used for heating the regeneration carrier gas 2 to enable the temperature of the regeneration carrier gas to be 300-800 ℃, and an electric heating or heat exchange mode is adopted; the heat exchanger 4 is arranged in the regeneration furnace 11 and used for keeping the temperature in the regeneration furnace 11 at 200-600 ℃, the heat exchanger 4 adopts a shell-and-tube type, the regeneration carrier gas 2 heated by the heating device 1 is in a tube side, and the desulfurizer is in a shell side. The gas detection device 7 uses a gas chromatograph, a detection tube or a portable detectorA gas detection instrument such as a detector and the like is used for testing the content of oxygen and sulfur-containing components in the regeneration tail gas 10 in real time, and the air inlet flow of the gas detection device 7 is controlled to be 20-100 mL/min; the gas detection device 7 is also internally provided with an alkaline washing device which absorbs sulfur-containing components in the gas detected by the gas detection device 7, the alkaline washing device is a gas washing bottle and is internally provided with 0.1-30 mass percent of alkaline solution, and the alkaline solution is NaOH, KOH or Na 2 CO 3 、K 2 CO 3 One or more of the above solutions. The temperature detection device 8 is used for detecting the temperature in the regeneration furnace 11 in real time and adopts a thermocouple or a thermal resistance type thermometer.
The blast furnace gas desulfurizer regeneration method applied to the blast furnace gas desulfurizer regeneration system comprises the following steps:
s1, when a gas detection device 7 detects that the oxygen content in regeneration tail gas 10 is less than 5%, sending an instruction through a control system 9, starting a heating device 1, opening a first valve 5, controlling the temperature in a regeneration furnace 11 to be 200-600 ℃, keeping the flow rate of regeneration carrier gas 2 entering the regeneration furnace 11 to be 20-100 mL/min, closing a fourth valve 16, and starting regeneration;
s2, when the gas detection device 7 detects that the sulfur content in the regeneration tail gas 10 is less than or equal to 10ppm, sending an instruction through the control system 9, closing the heating device 1 and the first valve 5, stopping regeneration, fully opening the second valve 6 and the fourth valve 16, and closing the fifth valve 13, wherein the instruction is used for cooling the desulfurizer to 50-100 ℃;
and S3, cooling the desulfurizer cooled to 50-100 ℃ to room temperature in a cooling furnace 12, weighing the weight of the desulfurizer before and after regeneration by a weighing device 15, and calculating to obtain the mass loss rate of the regenerated desulfurizer.
In the invention, a temperature detection device 8 detects the temperature in the regeneration furnace 11 in real time, keeps the temperature in the regeneration furnace 11 at 200-600 ℃, and when the temperature in the regeneration furnace 11 is lower than 200 ℃, a control system 9 sends an instruction to increase the power of a heating device 1 so that the temperature in the regeneration furnace 11 is higher than or equal to 200 ℃; when the temperature in the regenerating furnace 11 is higher than 600 ℃, the control system 9 sends out an instruction to reduce the power of the heating device 1, so that the temperature in the regenerating furnace 11 is less than or equal to 600 ℃. Before entering the heat exchanger 4, the regeneration carrier gas 2 is controlled to be shunted through the first valve 5 and the second valve 6, a small amount of the regeneration carrier gas 2 enters the regeneration furnace 11, so that an inert atmosphere is formed in the regeneration furnace 11, the desulfurizer is prevented from being oxidized and decomposed or burnt at high temperature in the regeneration process, and the inert atmosphere refers to the oxygen volume content of less than 5%; the regeneration carrier gas 2 is used for heating the regeneration furnace 11 on one hand, and is used for ensuring that an inert atmosphere is formed in the regeneration furnace 11 on the other hand, so that the desulfurizer is prevented from being oxidized and decomposed or burnt at high temperature in the regeneration process.
In the invention, the cooling furnace 12 is used for containing the regenerated desulfurizer which is cooled to 50-100 ℃ and is cooled to room temperature, and the material is stainless steel, carbon steel and other temperature-resistant materials.
In the present invention, the regenerator 11 and the cooling furnace 12 are both provided with weighing devices 15 for weighing the weight of the desulfurizing agent before and after regeneration and calculating the mass loss rate of the desulfurizing agent after regeneration.
In the specific embodiment 1, the method comprises the following steps of,
in this embodiment, 500kg of desulfurizer saturated by adsorption is added into a regenerator 11, the working sulfur capacity is 20%, a second valve 6 is opened, 2 nitrogen of regeneration carrier gas is introduced, the flow rate of 2 regenerated carrier gas is controlled to be 50mL/min, a fourth valve 16 is closed, a fifth valve 13 is opened, the oxygen content in 10 regenerated tail gas is detected by a gas chromatograph, when the oxygen content is less than or equal to 1%, a heating device 1 and a first valve 5 are simultaneously opened to ensure that the temperature in the regenerator 11 rises to 500 ℃, the total sulfur content in 10 regenerated tail gas is continuously detected on line, the sampling interval time is 30min, when the total sulfur content in 10 regenerated tail gas is less than or equal to 10ppm, the heating device 1 is stopped, the first valve 5 is closed, the second valve 6 is fully opened, the fourth valve 16 is opened, the fifth valve 13 is closed, nitrogen is introduced to cool the regenerated desulfurizer, when the temperature in the regenerator 11 falls to 50 ℃, the second valve 6 is closed, the third valve 14 is opened, the desulfurizer in 11 is cooled in a cooling furnace 12, and the desulfurizer in the regenerator is weighed to be 400kg at room temperature, and the loss rate of 4.0 mass percent.
In the specific embodiment 2, the method comprises the following steps of,
in this embodiment, 1000kg of desulfurizer saturated by adsorption is added into a regeneration furnace 11, the working sulfur capacity is 15%, the second valve 6 is opened to introduce the regeneration carrier gas 2, that is, the flue gas containing no oxygen, the flow rate of the regeneration carrier gas 2 is controlled to be 30mL/min, the fourth valve 16 is closed, the fifth valve 13 is opened, the oxygen content in the regeneration tail gas 10 is detected by a gas chromatograph, when the oxygen content is less than or equal to 3%, the heating device 1 and the first valve 5 are simultaneously opened to ensure that the temperature in the regeneration furnace 11 is increased to 400 ℃, the total sulfur content in the regeneration tail gas 10 is continuously detected on line, the sampling interval time is 20min, when the total sulfur content in the regeneration tail gas 10 is less than or equal to 10ppm, the heating device 1 is stopped, the first valve 5 is closed, the second valve 6 is fully opened, the fourth valve 16 is opened, the fifth valve 13 is closed, the regeneration carrier gas 2 is introduced to cool the regenerated desulfurizer, when the temperature in the regeneration furnace 11 is reduced to 70 ℃, the third valve 6 is closed, the desulfurizer is cooled to 850kg, and the loss rate is measured as 850 kg.
In the specific embodiment of the method of example 3,
in this embodiment, 2000kg of desulfurizer saturated by adsorption is added into a regeneration furnace 11, the working sulfur capacity is 10%, the second valve 6 is opened, the regeneration carrier gas 2, namely argon gas, is introduced, the flow rate of the regeneration carrier gas 2 is controlled to be 20mL/min, the fourth valve 16 is closed, the fifth valve 13 is opened, the oxygen content in the regeneration tail gas 10 is detected by a gas chromatograph, when the oxygen content is less than or equal to 5%, the heating device 1 and the first valve 5 are simultaneously opened to ensure that the temperature in the regeneration furnace 11 is increased to 450 ℃, the total sulfur content in the regeneration tail gas 10 is continuously detected on line, the sampling interval time is 10min, when the total sulfur content in the regeneration tail gas 10 is less than or equal to 10ppm, the heating device 1 is stopped, the first valve 5 is closed, the second valve 6 is fully opened, the fourth valve 16 is opened, the fifth valve 13 is closed, the regeneration carrier gas 2 is introduced to cool the regenerated desulfurizer, when the temperature in the regeneration furnace 11 is reduced to 90 ℃, the second valve 6 is closed, the third valve 14 is opened, the desulfurizer is discharged into a cooling furnace 12 to be cooled, the desulfurizer, and the loss rate is 890.78, and the weight loss rate is weighed.
In conclusion, the invention adopts automatic control and has the advantages of low energy consumption, short regeneration period, low regeneration cost, high regeneration efficiency, safety, reliability and the like.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. A blast furnace gas desulfurizer regeneration system is characterized in that: the device comprises a regeneration furnace, a heat exchanger arranged in the regeneration furnace, a regeneration carrier gas pipeline communicated with the heat exchanger, a heating device arranged on the regeneration carrier gas pipeline, and a cooling furnace communicated with the regeneration furnace through a third valve;
the cooling furnace and the regeneration furnace are internally provided with weighing devices, the regeneration furnace is connected with a temperature detection device and a gas detection device, and the third valve, the weighing devices, the temperature detection device, the gas detection device and the heating device are also communicated with a control system.
2. The blast furnace gas desulfurizing agent regenerating system according to claim 1, characterized in that: the regeneration carrier gas pipeline is communicated with the heat exchanger through a first valve and is also communicated with the inside of the regeneration furnace through a second valve, and the first valve and the second valve are both communicated with the control system;
the regeneration carrier gas pipeline is also communicated with a regeneration gas supplementing pipeline and is used for supplementing the regeneration carrier gas in the regeneration furnace.
3. The blast furnace gas desulfurizing agent regenerating system according to claim 1, characterized in that: a fourth valve and a fifth valve for discharging regeneration tail gas are sequentially arranged on a pipeline for communicating the regeneration furnace with the gas detection device;
the fourth valve and the fifth valve are both communicated with the control system.
4. The blast furnace gas desulfurizing agent regenerating system according to claim 1, characterized in that: the regeneration carrier gas pipeline is internally provided with regeneration carrier gas which adopts nitrogen or does not contain oxidizing gasAn inert gas in the flue gas or argon gas, the inert gas not containing oxidizing gas including oxygen, N 2 O、N 2 O 4 、O 3 。
5. The system for regenerating a blast furnace gas desulfurization agent according to claim 1, wherein: the regeneration furnace and the heating device are connected through a regeneration carrier gas pipeline in sequence to form a loop, the heating device is used for heating regeneration carrier gas to enable the temperature of the regeneration carrier gas to be 300-800 ℃, and an electric heating or heat exchange mode is adopted;
the heat exchanger is arranged in the regenerating furnace and used for keeping the temperature in the regenerating furnace at 200-600 ℃, the heat exchanger adopts a shell-and-tube type, the regenerating carrier gas heated by a heating device is in a tube side, and the desulfurizer is in a shell side.
6. The blast furnace gas desulfurizing agent regenerating system according to claim 1, characterized in that: the gas detection device uses a gas detection instrument in a gas chromatograph, a detection tube or a portable detector and is used for testing the content of oxygen and sulfur-containing components in the regenerated tail gas in real time, and the air inlet flow of the gas detection device is controlled to be 20-100 mL/min;
the gas detection device is also internally provided with an alkali washing device which absorbs sulfur-containing components in the gas detected by the gas detection device, the alkali washing device is a gas washing bottle and is internally filled with 0.1-30 mass percent of alkaline solution, and the alkaline solution is NaOH, KOH or Na 2 CO 3 、K 2 CO 3 One or more of the mixed solutions.
7. The blast furnace gas desulfurizing agent regenerating system according to claim 1, characterized in that: the temperature detection device is used for detecting the temperature in the regeneration furnace in real time and adopts a thermocouple or a thermal resistance type thermometer.
8. A method for regenerating a blast furnace gas desulfurizing agent, which uses the blast furnace gas desulfurizing agent regeneration system according to any one of claims 1 to 7, comprising the steps of:
s1, when a gas detection device detects that the oxygen content in the regeneration tail gas is less than 5%, sending an instruction through a control system, starting a heating device, opening a first valve, controlling the temperature in a regeneration furnace to be 200-600 ℃, keeping the flow of regeneration carrier gas entering the regeneration furnace to be 20-100 mL/min, closing a fourth valve, and starting regeneration;
s2, when the gas detection device detects that the sulfur content in the regeneration tail gas is less than or equal to 10ppm, sending an instruction through the control system, closing the heating device and the first valve, stopping regeneration, fully opening the second valve and the fourth valve, closing the fifth valve, and cooling the desulfurizing agent to 50-100 ℃;
and S3, cooling the desulfurizer cooled to 50-100 ℃ into a cooling furnace to be cooled to room temperature, weighing the weight of the desulfurizer before and after regeneration by using a weighing device, and calculating to obtain the mass loss rate of the regenerated desulfurizer.
9. The method for regenerating a blast furnace gas desulfurizing agent according to claim 8, wherein: the temperature detection device detects the temperature in the regeneration furnace in real time, keeps the temperature in the regeneration furnace between 200 and 600 ℃, and when the temperature in the regeneration furnace is lower than 200 ℃, the control system sends an instruction to increase the power of the heating device so that the temperature in the regeneration furnace is more than or equal to 200 ℃; when the temperature in the regenerating furnace is higher than 600 ℃, the control system sends out an instruction to reduce the power of the heating device, so that the temperature in the regenerating furnace is less than or equal to 600 ℃.
10. The method for regenerating a blast furnace gas desulfurizing agent according to claim 8, wherein: before entering the heat exchanger, the regeneration carrier gas is controlled to be shunted through a first valve and a second valve, a small amount of regeneration carrier gas enters the regeneration furnace, so that an inert atmosphere is formed in the regeneration furnace, the desulfurizer is prevented from being oxidized and decomposed or burnt at high temperature in the regeneration process, and the inert atmosphere refers to that the volume content of oxygen is less than 5%;
the regeneration carrier gas is used for heating the regeneration furnace on one hand, and is used for ensuring that an inert atmosphere is formed in the regeneration furnace on the other hand, so that the desulfurizing agent is prevented from being oxidized and decomposed or burnt at high temperature in the regeneration process.
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Citations (11)
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