CN218620723U - Blast furnace gas desulfurizer regeneration system - Google Patents
Blast furnace gas desulfurizer regeneration system Download PDFInfo
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- CN218620723U CN218620723U CN202222238647.0U CN202222238647U CN218620723U CN 218620723 U CN218620723 U CN 218620723U CN 202222238647 U CN202222238647 U CN 202222238647U CN 218620723 U CN218620723 U CN 218620723U
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Abstract
The utility model belongs to the technical field of the desulfurizer regeneration, a blast furnace gas desulfurizer regeneration system is related to, including regenerator, heat exchanger, cooling furnace, heating device, gaseous detection device, temperature-detecting device, control system, regeneration tonifying qi, valve, weighing device. 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, direct contact with the desulfurizer is avoided, and therefore recycling is achieved, 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, 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, signals are detected and fed back in real time, and automatic control is achieved. The utility model discloses an automated control, the energy consumption is low, regeneration cycle is short, regeneration cost is low, regeneration efficiency is high, safe and reliable.
Description
Technical Field
The utility model belongs to the technical field of desulfurizer regeneration, a blast furnace gas desulfurizer regeneration system is related to.
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 And the S form exists, after the desulfurizer is adsorbed and saturated, the desulfurizer is regenerated in a thermal regeneration mode to achieve the effect of repeated use, and sulfur elementary 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 due to 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 through phase change, 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.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a blast furnace gas desulfurizer regeneration system for solving the problems of high energy consumption, large consumption of regeneration carrier gas, large desulfurizer quality loss, high operational risk, etc. of the existing blast furnace gas desulfurizer regeneration process.
In order to achieve the above purpose, the utility model provides a 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 inflow rate 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 above 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 beneficial effects of the utility model reside in that:
1) The utility model relates to a blast furnace gas desulfurizer regeneration system, which fully utilizes the regenerative carrier gas to heat the desulfurizer for regeneration, realizes the reuse of the regenerative carrier gas in a mode of not contacting the desulfurizer, greatly reduces the regeneration energy consumption and the energy medium consumption, and reduces the regeneration cost;
2) The utility model relates to a blast furnace gas desulfurizer regeneration system, through linkage of gas detection device, temperature detection device, heating device, weighing device and valve and control system, real-time detection regeneration tail gas composition and regeneration temperature, accurate control regeneration time and regeneration temperature show that the regeneration cycle is reduced, effectively improved regeneration efficiency;
3) The utility model relates to a blast furnace gas desulfurizer regeneration system concentrates regulation and control blast furnace gas desulfurizer regeneration flow through control system, and degree of automation is high, the error that manual operation brought that has significantly reduced, and is whole safe 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/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features 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 desulfurizer according to the present invention.
Reference numerals are as follows: 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 following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit 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, 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 illustration only and not for the purpose of limiting the invention, the figures are shown in schematic form and not in pictorial form; for a better explanation of 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 numbers 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 are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
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 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, a portable detector or other gas detection instruments and is used for testing the content of oxygen and sulfur-containing components in the regenerated 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 utility model discloses during the use, including following step:
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.
The utility model discloses in, temperature-detecting device 8 real-time detection regenerator 11 internal temperature keeps regenerator 11 internal temperature at 200~600 ℃, when regenerator 11 internal temperature < 200 ℃, sends the instruction through control system 9, increases heating device 1 power, makes regenerator 11 internal temperature more 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.
The utility model discloses in, cooling furnace 12 is used for splendid attire regeneration after cooling to 50 ~ 100 ℃ desulfurizer cooling to room temperature, and the material adopts temperature resistant materials such as stainless steel, carbon steel.
The utility model discloses in, regenerator 11 and cooling furnace 12 all dispose weighing device 15 for weigh the weight of desulfurizer around the regeneration, calculate the mass loss rate that obtains the desulfurizer after the 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 regeneration furnace 11, the working sulfur capacity is 20%, the second valve 6 is opened, the regeneration carrier gas 2 nitrogen is introduced, the flow rate of the regeneration carrier gas 2 is controlled to be 50mL/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 1%, 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 500 ℃, the total sulfur content in the regeneration tail gas 10 is continuously detected on line, the sampling interval time is 30min, 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 regenerated desulfurizer is cooled by introducing nitrogen, when the temperature in the regeneration furnace 11 is reduced to 50 ℃, the second valve 6 is closed, the third valve 14 is opened, the desulfurizer in the regeneration furnace 11 is discharged into a cooling furnace 12 and cooled to room temperature, the regenerated desulfurizer is weighed to be 400kg, and the loss rate is 4.0.0 mass percent.
In the specific embodiment of the method of the invention 2,
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%, a second valve 6 is opened, a regeneration carrier gas 2, namely argon gas, is introduced, the flow rate of the regeneration carrier gas 2 is controlled to be 20mL/min, a fourth valve 16 is closed, a 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%, a 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 to room temperature, the loss rate of the desulfurizer is 1753 kg, and the loss rate is weighed to be 1758.8 kg.
To sum up, the utility model discloses an automated control has that the energy consumption is low, regeneration cycle is short, regeneration cost is low, regeneration efficiency is high, advantages such as safe and reliable.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to 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 scope of the claims of the present invention.
Claims (9)
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; weighing devices are arranged in the cooling furnace and the regeneration furnace, 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;
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.
2. 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.
3. 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 inert gas in the flue gas or argon gas which does not contain oxidizing gas.
4. The blast furnace gas desulfurizing agent regenerating system according to claim 1, characterized in that: 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 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.
5. The blast furnace gas desulfurizing agent regenerating system according to claim 4, characterized in that: the heat exchanger is arranged in the regenerating furnace and used for keeping the temperature in the regenerating furnace within 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 system for regenerating a blast furnace gas desulfurization agent according to claim 1, wherein: the gas detection device uses one gas detection instrument of 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.
7. The blast furnace gas desulfurizing agent regenerating system according to claim 6, wherein: the air inlet flow of the gas detection device is controlled to be 20-100 mL/min.
8. The blast furnace gas desulfurizing agent regenerating system according to claim 6, wherein: the gas detection device is also internally provided with an alkali washing device which is a gas washing bottle for absorbing sulfur-containing components in the gas detected by the gas detection device.
9. The system for regenerating a blast furnace gas desulfurization agent according to claim 1, wherein: 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.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115382522A (en) * | 2022-08-24 | 2022-11-25 | 重庆赛迪热工环保工程技术有限公司 | Blast furnace gas desulfurizer regeneration system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115382522A (en) * | 2022-08-24 | 2022-11-25 | 重庆赛迪热工环保工程技术有限公司 | Blast furnace gas desulfurizer regeneration system and method |
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