Integrated desulfurization and decarbonization blast furnace gas treatment system

Abstract

An integrated desulfurization and decarbonization blast furnace gas treatment system comprises an adsorption device, a post-adsorption cyclone separator and a screening device or a two-stage desorption device. The adsorption device comprises a first adsorption material inlet, a second adsorption material inlet and a blast furnace gas inlet which are formed in the lower part or the bottom, and an outlet formed in the upper part or the top. And the post-adsorption cyclone separator is provided with an inlet, a gas outlet and a solid outlet. And an outlet of the adsorption device is connected with an inlet of the post-adsorption cyclone separator. And a solid outlet of the post-adsorption cyclone separator is connected to the screening device or the two-stage desorption device. Two adsorption materials are conveyed into the adsorption device at the same time to achieve synchronous removal of sulfur and carbon, separation of the two adsorption materials is achieved through the screening device, and then separation of two desorption gases is achieved, or separation of the two desorption gases is achieved through the two-stage desorption device, so that the separation difficulty of the desorption gases H2S and CO2 is greatly reduced, and the separation efficiency of the desorption gases H2S and CO2 is improved. And the treatment process of pollution reduction and carbon reduction of the blast furnace gas is effectively simplified.

Description

Technical Field

[0001] The utility model relates to a blast furnace gas processing system, in particular to an integrated desulfurization and decarbonization blast furnace gas processing system, belonging to the field of environmental management. Background Art

[0002] Blast furnace gas is the largest by-product energetic medium in the steel process. In 2012, the national output was nearly 80 billion cubic meters. The calorific value of blast furnace gas is not high, only 3500KJ / m 3 The composition is relatively complex, including N2, CO2, CO, H2, HCl, O2, S, dust, etc. Among them, S contains organic sulfur COS and H2S, which cannot be removed by traditional desulfurization technology, causing equipment corrosion and pollutant emissions in subsequent pipeline transportation and terminal utilization; CO2 content is about 20%, which is the main source of carbon emissions in the steel process. Desulfurization and decarbonization of blast furnace gas at the source is a technical choice that is beneficial to the industry and society. However, for the blast furnaces that have been built, desulfurization and decarbonization require multiple sets of equipment, such as organic sulfur hydrolysis + sulfur adsorption desulfurization equipment, chemical absorption and desorption decarbonization equipment, which have the problems of large land occupation, large investment, high energy consumption and material loss, and long processing process. In actual engineering promotion, it is greatly hindered by the above problems and cost constraints.

[0003] Anhui Weida Environmental Protection Technology Co., Ltd. disclosed a blast furnace gas decarbonization and synergistic desulfurization method, CN116478739A, which adopts the traditional process series mode, that is, the decarbonization + desulfurization treatment method, in which the decarbonization method is amine absorption, and the desulfurization method is hydrolysis + dry adsorption. The overall process flow is long and the investment cost is high. At the same time, the flue gas temperature needs to be repeatedly adjusted to meet the requirements of decarbonization and desulfurization. The system is relatively complex, the operation and maintenance are difficult, and the processing cost is difficult to control. Zhejiang Feida Environmental Protection Technology Co., Ltd. disclosed a CO2 capture and utilization device suitable for blast furnace gas, CN113684068A, which is also similar.

[0004] MCC Southern Metropolis Environmental Protection Engineering Technology Co., Ltd. disclosed a blast furnace gas desulfurization and decarbonization system and process, CN115558529A, which uses an absorbent to remove H2S and CO2 at the same time, and then achieves desulfurization and decarbonization of blast furnace gas through the process of flash evaporation-desorption-sulfur secondary absorption and separation. Although this solution only uses one tower in the absorption stage, the subsequent desorption of the absorbent and the separation of sulfur are still relatively complicated, the overall process is relatively long, and there are multiple operations of heating and cooling and condensation gas-liquid separation, and the energy consumption is inevitably high. Utility Model Content

[0005] In view of the problems of long overall process flow, high investment cost, high energy consumption and material loss in the above-mentioned prior art when desulfurizing and decarbonizing blast furnace gas, the utility model proposes an integrated desulfurization and decarbonization blast furnace gas treatment system. The system uses a fluidized bed to adsorb and remove sulfur and carbon from blast furnace gas, and simultaneously removes sulfur and carbon by conveying two adsorption materials into the adsorption tower at the same time, and separates the two adsorption materials through a screening device to separate the two desorbed gases, or directly separates the two desorbed gases through a two-stage desorption device, thereby greatly reducing the difficulty of separating the desorbed gas H2S and CO2, effectively simplifying the treatment process of blast furnace gas pollution reduction and carbon reduction, and reducing energy consumption and floor space, and significantly reducing investment costs.

[0006] According to the implementation scheme of the utility model, a blast furnace gas treatment system with integrated desulfurization and decarbonization is provided.

[0007] An integrated desulfurization and decarbonization blast furnace gas treatment system, the system comprises an adsorption device, a post-adsorption cyclone separator, a screening device or a two-stage desorption device. The adsorption device comprises a first adsorption material inlet, a second adsorption material inlet, a blast furnace gas inlet, and an outlet arranged at the upper part or the top. The post-adsorption cyclone separator is provided with an inlet, a gas outlet and a solid outlet. The outlet of the adsorption device is connected to the inlet of the post-adsorption cyclone separator. The solid outlet of the post-adsorption cyclone separator is connected to the screening device or the two-stage desorption device.

[0008] In the utility model, the system also includes a first silo, a desorption device, a post-desorption cyclone separator, and a first gas tank. The desorption device includes a first adsorption particle inlet and a carrier gas inlet arranged at the lower part or the bottom, and an outlet arranged at the upper part or the top. The screened material outlet of the screening device is connected to the feed port of the first silo. The discharge port of the first silo is connected to the first adsorption particle inlet of the desorption device. The outlet of the desorption device is connected to the inlet of the post-desorption cyclone separator. The gas outlet of the post-desorption cyclone separator is connected to the first gas tank.

[0009] In the utility model, the system also includes a second silo and a second gas tank. A second adsorbed particle inlet is also provided at the lower part or bottom of the desorption device. The screened material outlet of the screening device is connected to the feed inlet of the second silo. The discharge port of the second silo is connected to the second adsorbed particle inlet of the desorption device. The outlet of the desorption device is connected to the inlet of the post-desorption cyclone separator. The gas outlet of the post-desorption cyclone separator is connected to the second gas tank.

[0010] Preferably, the system further comprises a three-way valve arranged at the gas outlet of the post-desorption cyclone separator. The gas outlet of the post-desorption cyclone separator is connected to the inlet of the three-way valve. The first outlet of the three-way valve is connected to the first gas tank. The second outlet of the three-way valve is connected to the second gas tank.

[0011] In the present invention, the solid outlet of the desorption cyclone separator is connected to the first adsorption material inlet of the adsorption device through a conveying device.

[0012] In the present invention, the system further comprises a fresh adsorbent silo, wherein the discharge port of the fresh adsorbent silo is connected to the second adsorbent material inlet of the adsorption device.

[0013] In the present invention, the solid outlet of the desorption cyclone separator is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device through a conveying device.

[0014] Preferably, a discharge port is further provided at the bottom of the desorption device, and the discharge port is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device through a conveying device.

[0015] Preferably, discharge valves are respectively provided at the bottom of the first silo and the bottom of the second silo.

[0016] In the utility model, the two-stage desorption device includes a primary desorption tower, a secondary desorption tower, a primary cyclone separator, a secondary cyclone separator, a primary gas tank, and a secondary gas tank. Among them, the primary desorption tower includes an adsorption particle inlet arranged at the lower part or the bottom, a low-temperature carrier gas inlet, and an outlet arranged at the upper part or the top. The secondary desorption tower includes an adsorption particle inlet arranged at the lower part or the bottom, a high-temperature carrier gas inlet, and an outlet arranged at the upper part or the top. The primary cyclone separator and the secondary cyclone separator are both provided with an inlet, a gas outlet, and a solid outlet. After adsorption, the solid outlet of the cyclone separator is connected to the adsorption particle inlet of the primary desorption tower. The outlet of the primary desorption tower is connected to the inlet of the primary cyclone separator. The gas outlet of the primary cyclone separator is connected to the primary gas tank. The solid outlet of the primary cyclone separator is connected to the adsorption particle inlet of the secondary desorption tower. The outlet of the secondary desorption tower is connected to the inlet of the secondary cyclone separator. The gas outlet of the secondary cyclone separator is connected to the secondary gas tank. The solid outlet of the primary cyclone separator is connected to the adsorption particle inlet of the secondary desorption tower. The outlet of the secondary desorption tower is connected to the inlet of the secondary cyclone separator. The gas outlet of the secondary cyclone separator is connected to the secondary gas tank.

[0017] Preferably, the solid outlet of the secondary cyclone separator is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device through a conveying device.

[0018] Preferably, the bottoms of the primary desorption tower and the secondary desorption tower are respectively provided with discharge ports, which are connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device through a conveying device.

[0019] In the present invention, the integrated desulfurization and decarbonization blast furnace gas treatment system includes three schemes. In the first scheme, Figure 1As shown, the system includes an adsorption device (such as an adsorption tower), a post-adsorption cyclone separator, and a screening device (such as a vibrating screen). Among them, a blast furnace gas inlet, a first adsorption material inlet, and a second adsorption material inlet are provided at the bottom or lower part of the adsorption device, and an outlet is provided at the top or upper part of the adsorption device. An inlet, a gas outlet, and a solid outlet are provided on the post-adsorption cyclone separator. The screening device is provided with a material inlet, an overscreen outlet, and an underscreen outlet. After passing through the hydrolysis tower, the organic sulfur COS in the blast furnace gas is hydrolyzed and converted into H2S and CO2. The hydrolyzed blast furnace gas enters the bottom of the adsorption device from the blast furnace gas inlet, and the two adsorption materials corresponding to the adsorption of H2S and CO2 enter the bottom of the adsorption device from the first adsorption material inlet and the second adsorption material inlet, respectively. The blast furnace gas entering the adsorption device drives the two adsorption materials to flow in the adsorption device. The H2S and CO2 in the blast furnace gas are adsorbed by the two adsorption materials respectively. The two adsorption particles adsorbing H2S and CO2 are discharged to the screening device through the solid outlet of the post-adsorption cyclone separator. Since the two adsorption particles are different in size or particle size, they can be separated and discharged through the screening device; the blast furnace gas that has been desulfurized and decarbonized is discharged from the gas outlet at the top of the post-adsorption cyclone separator and sent to the pipeline for subsequent use. This scheme realizes the simultaneous desulfurization and decarbonization of blast furnace gas in a single adsorption device in the form of a fluidized bed, reducing the equipment footprint and investment costs; moreover, the two adsorption materials are simultaneously transported into the adsorption device to achieve the simultaneous removal of sulfur and carbon, and thus the separation of the desorbed gas is transferred to the separation of the adsorption material, and the separation of the two adsorption materials is achieved through the screening device, thereby effectively simplifying the treatment process of blast furnace gas pollution reduction and carbon reduction, and greatly reducing the difficulty of separating the desorbed gas H2S and CO2, and reducing energy consumption.

[0020] In the above scheme, the system also includes a first silo, a desorption device, a post-desorption cyclone separator, and a first gas tank. The bottom or lower part of the desorption device is provided with a carrier gas inlet and a first adsorption particle inlet, and the top or upper part of the desorption device is provided with an outlet. The post-desorption cyclone separator is provided with an inlet, a gas outlet, and a solid outlet. After being separated and discharged by the screening device, the first adsorption particles saturated with CO2 adsorption enter the first silo, and then enter the bottom of the desorption device from the first adsorption particle inlet. The high-temperature carrier gas entering the desorption device from the carrier gas inlet drives the first adsorption particles to fluidize and rise in the desorption device. CO2 is desorbed during the heating process. The desorbed gas enters the post-desorption cyclone separator through the outlet at the top of the desorption device, and is discharged from the gas outlet of the post-desorption cyclone separator to the first gas tank; the adsorption material particles regenerated after desorption are discharged from the solid outlet of the post-desorption cyclone separator, and returned to the first adsorption material inlet of the adsorption device through the conveying device for recycling. At the same time, the second adsorption particles saturated with H2S are directly discarded, and a fresh adsorbent silo is added in front of the adsorption device to replenish fresh desulfurization adsorbent to the second adsorption material inlet, that is, the desulfurization adsorption material is no longer recycled. This solution recycles the decarbonization adsorption material, effectively reducing energy consumption and material consumption, and saving costs; the desulfurization adsorption material is used once, which reduces costs while ensuring the stability of desulfurization and decarbonization efficiency.

[0021] In the second option, if Figure 2 As shown, the integrated desulfurization and decarbonization blast furnace gas treatment system includes an adsorption device, a post-adsorption cyclone separator, a screening device, a first silo, a second silo, a desorption device, a post-desorption cyclone separator, a first gas tank, and a second gas tank, that is, a second silo and a second gas tank are added on the basis of the first scheme. In this scheme, the desulfurization adsorption material and the decarbonization adsorption material are returned to the adsorption device for recycling after desorption and regeneration, further reducing material consumption and reducing costs. After being separated and discharged by the screening device, the first adsorption particles saturated with CO2 adsorption enter the first silo, and the second adsorption particles saturated with H2S adsorption enter the second silo. The first adsorption particles saturated with CO2 adsorption in the first silo and the second adsorption particles saturated with H2S adsorption in the second silo are periodically and alternately transported to the desorption device for desorption and regeneration. When the first silo transports the first adsorption particles into the desorption device, the generated desorption gas enters the first gas tank via the post-desorption cyclone separator, and at this time, the regenerated adsorption material particles are discharged from the solid outlet of the post-desorption cyclone separator and returned to the adsorption device via the first adsorption material inlet for recycling. When the second silo transports the second adsorption particles into the desorption device, the generated desorption gas enters the second gas tank. At this time, the regenerated adsorption material particles return to the adsorption device through the second adsorption material inlet for recycling.

[0022] Preferably, the scheme further includes a three-way valve disposed at the gas outlet of the post-desorption cyclone separator, wherein the valve switching cycle of the three-way valve is consistent with the switching cycle of the first silo and the second silo for alternately conveying adsorbed particles, so that the desorbed gases generated by the two adsorbed particles respectively enter the corresponding gas tanks.

[0023] It is further preferred that a discharge port is provided at the bottom of the desorption device. If some of the adsorption material particles fall to the bottom of the desorption device after desorption and regeneration, they are discharged from the discharge port, and returned to the adsorption device through the first adsorption material inlet or the second adsorption material inlet by the conveying device for recycling. When the first silo conveys the first adsorption particles into the desorption device, the adsorption material particles that fall to the bottom of the desorption device after regeneration are discharged from the discharge port and return to the adsorption device through the first adsorption material inlet. When the second silo conveys the second adsorption particles into the desorption device, the adsorption material particles that fall to the bottom of the desorption device after regeneration return to the adsorption device through the second adsorption material inlet.

[0024] In the first and second solutions, the carrier gas entering the desorption device is the crude desorption product gas collected in the product gas tank (i.e., the first gas tank or the second gas tank), so as to avoid the problem that the desorption gas and the carrier gas need to be further separated. Figure 1 There is no decomposition process for the desulfurization adsorption material. It is discarded after reaching saturation after multiple cycles of adsorption of COS and H2S. Fresh desulfurization adsorbent is added to the adsorption tower. At this time, only the decarbonization adsorption material needs to be decomposed, and the carrier gas uses the desorption gas mainly composed of CO2 collected in the first gas tank. Figure 2 In the process, the desorption of the two adsorbent materials is carried out alternately, and the desorbed gas collected in the corresponding gas tank is used as the carrier gas, so the separation of the two desorbed gases can be achieved relatively easily. The temperature of the carrier gas in the desorption device is between 70-150°C, and the gas velocity (relative to the adsorbed particles) is about 0.5-2.0m / s to ensure the fluidization and sufficient desorption of the particles.

[0025] In the first and second schemes, the bottoms of the first and second silos are provided with discharge valves, respectively, and the bottoms of the fresh adsorbent silos are also provided with discharge valves. The setting of the discharge valves controls the discharge time and discharge amount of each silo. Among them, in the second scheme, the discharge valves corresponding to the first and second silos are periodically opened and closed, so that the first adsorbed particles in the first silo and the second adsorbed particles in the second silo alternately enter the desorption device, and the switching cycle is preferably 0.5-0.8 times the full silo time of the corresponding silo.

[0026] In the third option, if Figure 3As shown, the integrated desulfurization and decarbonization blast furnace gas treatment system includes an adsorption device, a post-adsorption cyclone separator, and a two-stage desorption device. The two-stage desorption device further includes a primary desorption tower, a secondary desorption tower, a primary cyclone separator, a secondary cyclone separator, a primary gas tank, and a secondary gas tank. Different from the first and second schemes, the aforementioned two schemes transfer the separation of desorbed gas to the separation of adsorbent materials, and then realize the separation of two desorbed gases through the separation of two adsorbent materials, while in this scheme, the two adsorbent materials do not need to be separated after adsorption saturation, and the separation of two desorbed gases is directly realized through two-stage desorption. After the solid outlet of the post-adsorption rotary separator is discharged, all the adsorbed particles (including two types of adsorbed particles) are first desorbed at low temperature in the primary desorption tower, and CO2 is mainly desorbed at this time. The desorbed CO2 enters the primary gas tank through the gas outlet of the primary cyclone separator; the solid outlet of the primary cyclone separator is discharged into the secondary adsorption tower, and the temperature in the secondary adsorption tower is relatively high. Through high-temperature desorption, H2S is mainly desorbed at this time, and the desorbed H2S enters the secondary gas tank through the gas outlet of the secondary cyclone separator. Since the regenerated adsorption material particles discharged from the solid outlet of the secondary cyclone separator are not separated, they can be arbitrarily selected to return to the adsorption device through the first adsorption material inlet or the second adsorption material inlet for recycling.

[0027] In this scheme, the low-temperature carrier gas used for the first-stage desorption is the CO2 desorption gas collected in the first-stage gas tank, and the temperature range of the low-temperature desorption is 60-90°C. The high-temperature carrier gas used for the second-stage desorption is the H2S desorption gas collected in the second-stage gas tank, and the temperature range of the high-temperature desorption is 100-130°C.

[0028] Preferably, the bottom of the primary desorption tower and the secondary desorption tower are provided with a discharge port, respectively. If some adsorption material particles fall to the bottom of the primary desorption tower or the secondary desorption tower after desorption and regeneration, they are discharged from the corresponding discharge port, and returned to the adsorption device through the first adsorption material inlet or the second adsorption material inlet through the conveying device for recycling.

[0029] In the present application, the adsorbent materials entering the adsorption device include H2S adsorbent material and CO2 adsorbent material. The two adsorbent materials are respectively a microporous carbon-based material modified by an alkali metal salt or an alkaline earth metal salt and a molecular sieve material loaded (or unloaded) with amines. Since the adsorption is selective, H2S and CO2 are selectively adsorbed by the two adsorbent materials, respectively, and H2S is mainly chemically adsorbed, while CO2 is mainly physically adsorbed. The adsorption temperatures are both around 40°C. Therefore, the mutual influence of the two adsorbent materials placed in an adsorption tower is small, and the simultaneous removal of sulfur and carbon can be achieved. The two adsorbent materials differ in particle size or size, and size classification and separation can be achieved through a screening device. Generally speaking, the particle size range of the adsorbent material is 50μm-20mm, and the bulk density of the material is 0.3-0.7g / cm 3. The first and second schemes of the present application transfer the separation of desorbed gas to the separation of adsorbent materials on the basis of simultaneous removal of sulfur and carbon, that is, separation of two adsorbent materials is achieved through a screening device, thereby achieving separation of desorbed gas H2S and CO2, and maintaining the number of adsorption / desorption devices as one group, which simplifies the treatment process and reduces the number of devices. It is a better scheme in terms of cost and energy consumption. The third scheme of the present application directly realizes the separation of desorbed gas through two-stage desorption on the basis of simultaneous removal of sulfur and carbon. Compared with the first two schemes, it is simpler in operation and control. Moreover, compared with the prior art, the third scheme also simplifies the treatment process and saves costs.

[0030] In the present application, "analysis" and "desorption" have the same meaning and can be used interchangeably.

[0031] Compared with the prior art, the utility model has the following beneficial effects:

[0032] 1. The utility model adopts a fluidized bed to adsorb and remove sulfur and carbon from blast furnace gas. The simultaneous removal of sulfur and carbon is achieved by simultaneously conveying two adsorption materials into the adsorption device, and the separation of the two adsorption materials is achieved through a screening device to achieve the separation of the two desorbed gases, or the separation of the two desorbed gases is achieved directly through a two-stage desorption device, thereby greatly reducing the difficulty of separating the desorbed gases H2S and CO2, effectively simplifying the treatment process of blast furnace gas pollution reduction and carbon reduction, reducing energy consumption and floor space, and significantly reducing investment costs.

[0033] 2. Compared with the existing schemes, the first and second schemes of the utility model only use one set of adsorption and desorption devices for desulfurization and decarbonization, which effectively simplifies the treatment process, reduces the equipment footprint, and greatly reduces construction and equipment investment. The third scheme is easy to operate and control, which also simplifies the treatment process and saves costs.

[0034] 3. The utility model recycles the decarbonization adsorption material and the desulfurization adsorption material, effectively reducing energy consumption and material consumption and saving costs. Moreover, the utility model adopts a fluidized bed synchronous removal process, which can flexibly adjust the feed amount and feed ratio of the two adsorption materials according to the CO2 and H2S concentrations in the flue gas, thereby reducing material loss and ensuring the stability of the desulfurization and decarbonization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the first structure of the blast furnace gas treatment system for integrated desulfurization and decarbonization in the utility model;

[0036] Figure 2 This is a second structural schematic diagram of the blast furnace gas treatment system with integrated desulfurization and decarbonization in the utility model;

[0037] Figure 3 This is a third structural schematic diagram of the blast furnace gas treatment system with integrated desulfurization and decarbonization in the utility model.

[0038] Reference numerals:

[0039] 1: adsorption device; 2: cyclone separator after adsorption; 3: screening device; 4: two-stage desorption device; 401: primary desorption tower; 402: secondary desorption tower; 403: primary cyclone separator; 404: secondary cyclone separator; 405: primary gas tank; 406: secondary gas tank; 5: first silo; 6: desorption device; 7: cyclone separator after desorption; 8: first gas tank; 9: second silo; 10: second gas tank; 11: three-way valve; 12: fresh adsorbent silo; 13: unloading valve. DETAILED DESCRIPTION

[0040] The technical solution of the utility model is illustrated below, and the scope of protection requested for the utility model includes but is not limited to the following embodiments.

[0041] According to the implementation scheme of the utility model, a blast furnace gas treatment system with integrated desulfurization and decarbonization is provided.

[0042] An integrated desulfurization and decarbonization blast furnace gas treatment system, the system comprises an adsorption device 1, a post-adsorption cyclone separator 2, a screening device 3 or a two-stage desorption device 4. The adsorption device 1 comprises a first adsorption material inlet, a second adsorption material inlet, a blast furnace gas inlet, and an outlet arranged at the upper part or the top. The post-adsorption cyclone separator 2 is provided with an inlet, a gas outlet and a solid outlet. The outlet of the adsorption device 1 is connected to the inlet of the post-adsorption cyclone separator 2. The solid outlet of the post-adsorption cyclone separator 2 is connected to the screening device 3 or the two-stage desorption device 4.

[0043] In the utility model, the system also includes a first silo 5, a desorption device 6, a post-desorption cyclone separator 7, and a first gas tank 8. The desorption device 6 includes a first adsorption particle inlet and a carrier gas inlet arranged at the lower part or the bottom, and an outlet arranged at the upper part or the top. The screened material outlet of the screening device 3 is connected to the feed port of the first silo 5. The discharge port of the first silo 5 is connected to the first adsorption particle inlet of the desorption device 6. The outlet of the desorption device 6 is connected to the inlet of the post-desorption cyclone separator 7. The gas outlet of the post-desorption cyclone separator 7 is connected to the first gas tank 8.

[0044] In the utility model, the system also includes a second silo 9 and a second gas tank 10. A second adsorbed particle inlet is also provided at the lower part or bottom of the desorption device 6. The screened material outlet of the screening device 3 is connected to the feed inlet of the second silo 9. The discharge port of the second silo 9 is connected to the second adsorbed particle inlet of the desorption device 6. The outlet of the desorption device 6 is connected to the inlet of the post-desorption cyclone separator 7. The gas outlet of the post-desorption cyclone separator 7 is connected to the second gas tank 10.

[0045] Preferably, the system further comprises a three-way valve 11 disposed at the gas outlet of the post-desorption cyclone separator 7. The gas outlet of the post-desorption cyclone separator 7 is connected to the inlet of the three-way valve 11. The first outlet of the three-way valve 11 is connected to the first gas tank 8. The second outlet of the three-way valve 11 is connected to the second gas tank 10.

[0046] In the present invention, the solid outlet of the post-desorption cyclone separator 7 is connected to the first adsorption material inlet of the adsorption device 1 through a conveying device.

[0047] In the present invention, the system further comprises a fresh adsorbent silo 12 . The outlet of the fresh adsorbent silo 12 is connected to the second adsorbent material inlet of the adsorption device 1 .

[0048] In the present invention, the solid outlet of the post-desorption cyclone separator 7 is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device 1 through a conveying device.

[0049] Preferably, a discharge port is further provided at the bottom of the desorption device 6. The discharge port is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device 1 through a conveying device.

[0050] Preferably, a discharge valve 13 is provided at the bottom of the first silo 5 and the bottom of the second silo 9 respectively.

[0051] In the utility model, the two-stage desorption device 4 includes a primary desorption tower 401, a secondary desorption tower 402, a primary cyclone separator 403, a secondary cyclone separator 404, a primary gas tank 405, and a secondary gas tank 406. Among them, the primary desorption tower 401 includes an adsorption particle inlet arranged at the lower part or the bottom, a low-temperature carrier gas inlet, and an outlet arranged at the upper part or the top. The secondary desorption tower 402 includes an adsorption particle inlet arranged at the lower part or the bottom, a high-temperature carrier gas inlet, and an outlet arranged at the upper part or the top. The primary cyclone separator 403 and the secondary cyclone separator 404 are both provided with an inlet, a gas outlet, and a solid outlet. After adsorption, the solid outlet of the cyclone separator 2 is connected to the adsorption particle inlet of the primary desorption tower 401. The outlet of the primary desorption tower 401 is connected to the inlet of the primary cyclone separator 403. The gas outlet of the primary cyclone separator 403 is connected to the primary gas tank 405. The solid outlet of the primary cyclone separator 403 is connected to the adsorbed particle inlet of the secondary desorption tower 402. The outlet of the secondary desorption tower 402 is connected to the inlet of the secondary cyclone separator 404. The gas outlet of the secondary cyclone separator 404 is connected to the secondary gas tank 406.

[0052] Preferably, the solid outlet of the secondary cyclone separator 404 is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device 1 through a conveying device.

[0053] Preferably, the bottoms of the primary desorption tower 401 and the secondary desorption tower 402 are respectively provided with discharge ports, which are connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device 1 through a conveying device.

[0054] Example 1

[0055] like Figure 1 As shown, an integrated desulfurization and decarbonization blast furnace gas treatment system includes an adsorption device 1, a post-adsorption cyclone separator 2, and a screening device 3. The adsorption device 1 includes a first adsorption material inlet and a second adsorption material inlet arranged at the bottom, a blast furnace gas inlet arranged at the bottom, and an outlet arranged at the top. The post-adsorption cyclone separator 2 is provided with an inlet, a gas outlet, and a solid outlet. Among them, the outlet of the adsorption device 1 is connected to the inlet of the post-adsorption cyclone separator 2. The solid outlet of the post-adsorption cyclone separator 2 is connected to the screening device 3.

[0056] Example 2

[0057] Example 1 is repeated, except that the system further includes a first silo 5, a desorption device 6, a post-desorption cyclone separator 7, and a first gas tank 8. The desorption device 6 includes a first adsorption particle inlet arranged at the bottom, a carrier gas inlet arranged at the bottom, and an outlet arranged at the top. The screened material outlet of the screening device 3 is connected to the feed port of the first silo 5. The discharge port of the first silo 5 is connected to the first adsorption particle inlet of the desorption device 6. The outlet of the desorption device 6 is connected to the inlet of the post-desorption cyclone separator 7. The gas outlet of the post-desorption cyclone separator 7 is connected to the first gas tank 8.

[0058] Example 3

[0059] Example 2 was repeated except that the solid outlet of the cyclone separator 7 after desorption was connected to the first adsorption material inlet of the adsorption device 1 through a conveying device.

[0060] Example 4

[0061] Example 3 is repeated, except that the system further comprises a fresh adsorbent silo 12. The outlet of the fresh adsorbent silo 12 is connected to the second adsorbent material inlet of the adsorption device 1.

[0062] Example 5

[0063] Example 4 is repeated, except that a discharge valve 13 is provided at the bottom of the first silo 5. A discharge valve is also provided at the bottom of the fresh adsorbent silo 12.

[0064] Example 6

[0065] like Figure 2 As shown, an integrated desulfurization and decarbonization blast furnace gas treatment system includes an adsorption device 1, a post-adsorption cyclone separator 2, and a screening device 3. The adsorption device 1 includes a first adsorption material inlet and a second adsorption material inlet arranged at the bottom, a blast furnace gas inlet arranged at the bottom, and an outlet arranged at the top. The post-adsorption cyclone separator 2 is provided with an inlet, a gas outlet, and a solid outlet. Among them, the outlet of the adsorption device 1 is connected to the inlet of the post-adsorption cyclone separator 2. The solid outlet of the post-adsorption cyclone separator 2 is connected to the screening device 3.

[0066] The system also includes a first silo 5, a desorption device 6, a post-desorption cyclone separator 7, and a first gas tank 8. The desorption device 6 includes a first adsorption particle inlet arranged at the bottom, a carrier gas inlet arranged at the bottom, and an outlet arranged at the top. The screened material outlet of the screening device 3 is connected to the feed port of the first silo 5. The discharge port of the first silo 5 is connected to the first adsorption particle inlet of the desorption device 6. The outlet of the desorption device 6 is connected to the inlet of the post-desorption cyclone separator 7. The gas outlet of the post-desorption cyclone separator 7 is connected to the first gas tank 8.

[0067] The system also includes a second silo 9 and a second gas tank 10. A second adsorbed particle inlet is also provided at the lower portion of the desorption device 6. The screened material outlet of the screening device 3 is connected to the feed inlet of the second silo 9. The discharge port of the second silo 9 is connected to the second adsorbed particle inlet of the desorption device 6. The outlet of the desorption device 6 is connected to the inlet of the post-desorption cyclone separator 7. The gas outlet of the post-desorption cyclone separator 7 is connected to the second gas tank 10.

[0068] In this embodiment, the first silo and the second silo periodically and alternately transport adsorbed particles into the desorption device. When the first silo transports the first adsorbed particles into the desorption device, the generated desorbed gas enters the first gas tank via the post-desorption cyclone separator. When the second silo transports the second adsorbed particles into the desorption device, the generated desorbed gas enters the second gas tank.

[0069] Example 7

[0070] Example 6 is repeated, except that the system further includes a three-way valve 11 disposed at the gas outlet of the post-desorption cyclone separator 7. The gas outlet of the post-desorption cyclone separator 7 is connected to the inlet of the three-way valve 11. The first outlet of the three-way valve 11 is connected to the first gas tank 8. The second outlet of the three-way valve 11 is connected to the second gas tank 10.

[0071] The valve switching cycle of the three-way valve is consistent with the switching cycle of the first silo and the second silo for alternately conveying the adsorbed particles.

[0072] Example 8

[0073] Example 7 was repeated except that the solid outlet of the cyclone separator 7 was connected to the first adsorption material inlet and the second adsorption material inlet of the adsorption device 1 through a conveying device after desorption.

[0074] When the first silo delivers the first adsorbent particles into the desorption device, the regenerated adsorbent particles return to the adsorption device through the first adsorbent inlet for recycling. When the second silo delivers the second adsorbent particles into the desorption device, the regenerated adsorbent particles return to the adsorption device through the second adsorbent inlet.

[0075] Example 9

[0076] Example 8 was repeated, except that a discharge port was further provided at the bottom of the desorption device 6. The discharge port was connected to the first adsorption material inlet and the second adsorption material inlet of the adsorption device 1 respectively through a conveying device.

[0077] When the first silo delivers the first adsorbent particles into the desorption device, the adsorbent material particles that have fallen to the bottom of the desorption device after regeneration are discharged from the discharge port and return to the adsorption device through the first adsorption material inlet for recycling. When the second silo delivers the second adsorbent particles into the desorption device, the adsorbent material particles that have fallen to the bottom of the desorption device after regeneration return to the adsorption device through the second adsorption material inlet.

[0078] Example 10

[0079] Example 9 is repeated, except that discharge valves 13 are respectively provided at the bottom of the first silo 5 and the bottom of the second silo 9 .

[0080] The discharge valves at the bottom of the two silos are opened and closed periodically, so that the first adsorption particles in the first silo and the second adsorption particles in the second silo alternately enter the desorption device.

[0081] Embodiment 11

[0082] like Figure 3 As shown, an integrated desulfurization and decarbonization blast furnace gas treatment system includes an adsorption device 1, a post-adsorption cyclone separator 2, and a two-stage desorption device 4. The adsorption device 1 includes a first adsorption material inlet and a second adsorption material inlet arranged at the bottom, a blast furnace gas inlet arranged at the bottom, and an outlet arranged at the top. The post-adsorption cyclone separator 2 is provided with an inlet, a gas outlet, and a solid outlet. Among them, the outlet of the adsorption device 1 is connected to the inlet of the post-adsorption cyclone separator 2. The solid outlet of the post-adsorption cyclone separator 2 is connected to the two-stage desorption device 4.

[0083] Example 12

[0084] Example 11 is repeated, except that the two-stage desorption device 4 includes a primary desorption tower 401, a secondary desorption tower 402, a primary cyclone separator 403, a secondary cyclone separator 404, a primary gas tank 405, and a secondary gas tank 406. Among them, the primary desorption tower 401 includes an adsorption particle inlet arranged at the bottom, a low-temperature carrier gas inlet arranged at the bottom, and an outlet arranged at the top. The secondary desorption tower 402 includes an adsorption particle inlet arranged at the bottom, a high-temperature carrier gas inlet arranged at the bottom, and an outlet arranged at the top. The primary cyclone separator 403 and the secondary cyclone separator 404 are both provided with an inlet, a gas outlet, and a solid outlet. After adsorption, the solid outlet of the cyclone separator 2 is connected to the adsorption particle inlet of the primary desorption tower 401. The outlet of the primary desorption tower 401 is connected to the inlet of the primary cyclone separator 403. The gas outlet of the primary cyclone separator 403 is connected to the primary gas tank 405. The solid outlet of the primary cyclone separator 403 is connected to the adsorption particle inlet of the secondary desorption tower 402. The outlet of the secondary desorption tower 402 is connected to the inlet of the secondary cyclone separator 404. The gas outlet of the secondary cyclone separator 404 is connected to the secondary gas tank 406.

[0085] Example 13

[0086] Example 12 is repeated except that the solid outlet of the secondary cyclone separator 404 is connected to the first adsorption material inlet or the second adsorption material inlet of the adsorption device 1 through a conveying device.

[0087] In this embodiment, the two adsorption materials in the adsorption device do not need to be separated after adsorption saturation, and the separation of the two desorbed gases can be achieved through two-stage desorption. Since the two adsorption material particles regenerated after desorption are not separated, they can be arbitrarily selected to return to the adsorption device through the first adsorption material inlet or the second adsorption material inlet for recycling.

[0088] Embodiment 14

[0089] Example 13 was repeated, except that discharge ports were respectively provided at the bottom of the primary desorption tower 401 and the secondary desorption tower 402. The discharge ports were connected to the first adsorption material inlet or the second adsorption material inlet of the adsorption device 1 through a conveying device.

Claims

1. An integrated desulfurization and decarbonization blast furnace gas treatment system, characterized in that: The system comprises an adsorption device (1), a post-adsorption cyclone separator (2), a screening device (3) or a two-stage desorption device (4); the adsorption device (1) comprises a first adsorption material inlet, a second adsorption material inlet, a blast furnace gas inlet arranged at the lower part or the bottom, and an outlet arranged at the upper part or the top; the post-adsorption cyclone separator (2) is provided with an inlet, a gas outlet and a solid outlet; wherein the outlet of the adsorption device (1) is connected to the inlet of the post-adsorption cyclone separator (2); and the solid outlet of the post-adsorption cyclone separator (2) is connected to the screening device (3) or the two-stage desorption device (4).

2. The blast furnace gas treatment system according to claim 1, characterized in that: The system further comprises a first silo (5), a desorption device (6), a post-desorption cyclone separator (7), and a first gas tank (8); wherein the desorption device (6) comprises a first adsorbed particle inlet and a carrier gas inlet arranged at the lower part or the bottom, and an outlet arranged at the upper part or the top; the screened material outlet of the screening device (3) is connected to the feed inlet of the first silo (5); the discharge port of the first silo (5) is connected to the first adsorbed particle inlet of the desorption device (6); the outlet of the desorption device (6) is connected to the inlet of the post-desorption cyclone separator (7); and the gas outlet of the post-desorption cyclone separator (7) is connected to the first gas tank (8).

3. The blast furnace gas treatment system according to claim 2, characterized in that: The system further comprises a second silo (9) and a second gas tank (10); a second adsorbed particle inlet is further provided at the lower part or bottom of the desorption device (6); the undersize outlet of the sieving device (3) is connected to the feed inlet of the second silo (9); the discharge port of the second silo (9) is connected to the second adsorbed particle inlet of the desorption device (6); the outlet of the desorption device (6) is connected to the inlet of a post-desorption cyclone separator (7); and the gas outlet of the post-desorption cyclone separator (7) is connected to the second gas tank (10).

4. The blast furnace gas treatment system according to claim 3, characterized in that: The system further comprises a three-way valve (11) arranged at the gas outlet of the post-desorption cyclone separator (7); the gas outlet of the post-desorption cyclone separator (7) is connected to the inlet of the three-way valve (11); the first outlet of the three-way valve (11) is connected to the first gas tank (8); and the second outlet of the three-way valve (11) is connected to the second gas tank (10).

5. The blast furnace gas treatment system according to claim 2, characterized in that: The solid outlet of the desorption cyclone separator (7) is connected to the first adsorption material inlet of the adsorption device (1) via a conveying device; and / or The system further comprises a fresh adsorbent silo (12); the outlet of the fresh adsorbent silo (12) is connected to the second adsorbent material inlet of the adsorption device (1).

6. The blast furnace gas treatment system according to claim 3 or 4, characterized in that: The solid outlet of the post-desorption cyclone separator (7) is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device (1) via a conveying device.

7. The blast furnace gas processing system according to any one of claims 2 to 5, characterized in that: The desorption device (6) is also provided with a discharge port at the bottom; the discharge port is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device (1) via a conveying device.

8. The blast furnace gas treatment system according to claim 6, characterized in that: The desorption device (6) is also provided with a discharge port at the bottom; the discharge port is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device (1) via a conveying device.

9. The blast furnace gas processing system according to any one of claims 3 to 5, characterized in that: Discharge valves (13) are respectively provided at the bottom of the first material bin (5) and the second material bin (9).

10. The blast furnace gas processing system according to claim 6, characterized in that: Discharge valves (13) are respectively provided at the bottom of the first material bin (5) and the second material bin (9).

11. The blast furnace gas processing system according to claim 1, characterized in that: The two-stage desorption device (4) comprises a first-stage desorption tower (401), a second-stage desorption tower (402), a first-stage cyclone separator (403), a second-stage cyclone separator (404), a first-stage gas tank (405), and a second-stage gas tank (406); wherein the first-stage desorption tower (401) comprises an adsorption particle inlet arranged at the lower part or the bottom, a low-temperature carrier gas inlet, and an outlet arranged at the upper part or the top; the second-stage desorption tower (402) comprises an adsorption particle inlet arranged at the lower part or the bottom, a high-temperature carrier gas inlet, and an outlet arranged at the upper part or the top; the first-stage cyclone separator (403) and the second-stage cyclone separator (404) are both provided with inlet, gas outlet, and solid outlet; the solid outlet of the post-adsorption cyclone separator (2) is connected to the adsorption particle inlet of the primary desorption tower (401); the outlet of the primary desorption tower (401) is connected to the inlet of the primary cyclone separator (403); the gas outlet of the primary cyclone separator (403) is connected to the primary gas tank (405); the solid outlet of the primary cyclone separator (403) is connected to the adsorption particle inlet of the secondary desorption tower (402); the outlet of the secondary desorption tower (402) is connected to the inlet of the secondary cyclone separator (404); and the gas outlet of the secondary cyclone separator (404) is connected to the secondary gas tank (406).

12. The blast furnace gas processing system according to claim 11, characterized in that: The solid outlet of the secondary cyclone separator (404) is connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device (1) via a conveying device; and / or The first desorption tower (401) and the second desorption tower (402) are respectively provided with discharge ports at the bottom; the discharge ports are connected to the first adsorption material inlet and / or the second adsorption material inlet of the adsorption device (1) via a conveying device.

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