CN220224103U - Blast furnace gas pretreatment and hydrolysis reaction integrated device - Google Patents
Blast furnace gas pretreatment and hydrolysis reaction integrated device Download PDFInfo
- Publication number
- CN220224103U CN220224103U CN202321490199.1U CN202321490199U CN220224103U CN 220224103 U CN220224103 U CN 220224103U CN 202321490199 U CN202321490199 U CN 202321490199U CN 220224103 U CN220224103 U CN 220224103U
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- heat exchanger
- hydrolysis
- tower body
- pretreatment
- gas
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- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 63
- 230000007062 hydrolysis Effects 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 239000003034 coal gas Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims 1
- 238000006477 desulfuration reaction Methods 0.000 abstract description 12
- 230000023556 desulfurization Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 238000006298 dechlorination reaction Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 66
- 239000003795 chemical substances by application Substances 0.000 description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 229910052717 sulfur Inorganic materials 0.000 description 8
- 239000011593 sulfur Substances 0.000 description 8
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 125000001741 organic sulfur group Chemical group 0.000 description 5
- 230000003301 hydrolyzing effect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical group S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- -1 hydrolysis reaction Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The utility model discloses a blast furnace gas pretreatment and hydrolysis reaction integrated device. The device comprises a tower body, wherein the bottom of the tower body is provided with a gas inlet, and the top of the tower body is provided with a hydrolysis zone outlet; a pretreatment area, a heat exchanger A, a heating device and a hydrolysis area are sequentially arranged in the tower body from the gas inlet to the top, or the pretreatment area, the heating device, the heat exchanger A and the hydrolysis area are sequentially arranged in the tower body from the gas inlet to the top; the side wall of the tower body is provided with a heat exchange generation inlet and a coal gas outlet, the heat exchange generation inlet is communicated with the hydrolysis area outlet, the heat exchanger A is communicated with the heat exchange generation inlet, and the heat source of the heat exchanger A is coal gas discharged from the hydrolysis area outlet. The utility model organically combines pretreatment and hydrolysis equipment, realizes the dust removal, dechlorination and hydrolysis process in the gas dry desulfurization process in one tower, reduces the number of process equipment and the consumption of gas pipelines, reduces the cost and saves the occupied area.
Description
Technical Field
The utility model relates to a blast furnace gas treatment device, in particular to a blast furnace gas pretreatment and hydrolysis reaction integrated device.
Background
The blast furnace gas is the combustible gas with the largest yield in iron and steel enterprises, and is mainly used as fuel for blast furnaces, hot blast stoves, steel rolling heat treatment furnaces and boilers. Sulfur in blast furnace gas is mainly divided into organic sulfur and inorganic sulfur, wherein the main components of the organic sulfur include carbonyl sulfide, carbon disulfide, and the like; the main component of inorganic sulfur is hydrogen sulfide. The total sulfur content of the blast furnace gas is between 100 and 200mg/Nm3, wherein the organic sulfur is mainly carbonyl sulfide (COS) and accounts for about 80 percent; the inorganic sulfur is mainly hydrogen sulfide (H2S) and accounts for about 20 percent. If the blast furnace gas is not desulfurized, pollutants (NOx, SO2 and the like) can be generated by direct combustion, and if the blast furnace gas is discharged into the air, the blast furnace gas is a main pollution source of atmospheric pollution and does not accord with the environmental protection policy formulated by the state.
The prior dry desulfurization process is used for removing organic sulfur and inorganic sulfur, and is usually formed by connecting 10-20 ten thousand Nm3/h blast furnace gas treatment capacity desulfurization lines in parallel, wherein the gas to be treated firstly enters a gas pretreatment system, then the temperature of the gas is regulated to the hydrolysis temperature through a heat exchanger, the organic sulfur is converted into the inorganic sulfur in a hydrolysis tower, finally the inorganic sulfur enters a desulfurization tower and is desulfurized by means of a desulfurizing agent, and the purified blast furnace gas is sent into a gas pipe network to each gas utilization point. The dry desulfurization process has the advantages of more main equipment, huge desulfurization device and high energy consumption for temperature adjustment, thereby causing high energy consumption, large occupied area, inconvenient equipment overhaul and maintenance and limiting the popularization of the process.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the utility model provides an integrated device for pretreatment and hydrolysis reaction of blast furnace gas.
Therefore, the integrated device for pretreatment and hydrolysis reaction of blast furnace gas provided by the utility model comprises a tower body, wherein the bottom of the tower body is provided with a gas inlet, and the top of the tower body is provided with a hydrolysis zone outlet; a pretreatment area, a heat exchanger A, a heating device and a hydrolysis area are sequentially arranged in the tower body from the gas inlet to the top, or the pretreatment area, the heating device, the heat exchanger A and the hydrolysis area are sequentially arranged in the tower body from the gas inlet to the top;
the side wall of the tower body is provided with a heat exchange generation inlet and a coal gas outlet, the heat exchange generation inlet is communicated with the hydrolysis area outlet, the heat exchanger A is communicated with the heat exchange generation inlet, and the heat source of the heat exchanger A is coal gas discharged from the hydrolysis area outlet.
Alternatively, the heating device adopts a heat exchanger B.
Alternatively, the heat exchanger a and the heat exchanger B are independently selected from a rotary plate heat exchanger or a tubular heat exchanger.
Alternatively, the heating device is installed in the tower body by the support structure B, and a vibration reduction assembly is arranged between the heating device and the support structure B.
Alternatively, the heat exchange generating inlet is in a conical structure, and the gas outlet is in a conical structure.
Alternatively, the heat exchange generating inlet and the gas outlet are provided with guide plates.
The alternative scheme is that the side wall of the tower body where the heat exchanger A is arranged is provided with an exhaust port and a clean exhaust port.
Alternatively, the side walls of the tower body of the hydrolysis area and the pretreatment area are provided with loading and unloading openings.
Optionally, a plurality of access holes are sequentially formed in the top to the bottom of the upper edge of the tower body.
Optionally, an overhaul hanging column is arranged outside the tower body.
The tower body is formed by assembling a lower sealing head, a cylinder body A, a cylinder body B, a cylinder body C and an upper sealing head through flanges, the pretreatment area is positioned in the cylinder body A, the heat exchanger A is positioned in the cylinder body B, the hydrolysis area is positioned in the cylinder body C, and the heating device is positioned in the cylinder body A or in the cylinder body B or in the cylinder body C.
The utility model realizes the dust removal, dechlorination and hydrolysis process in the gas dry desulfurization process in one tower by organically combining pretreatment and hydrolysis equipment, reduces the number of process equipment and the consumption of gas pipelines, reduces the cost, saves the occupied area and ensures more flexible fine desulfurization arrangement; the hydrolyzed coal gas is recycled by arrangement, the pretreated coal gas is heated, the heat of the coal gas is fully utilized, the heat exchange efficiency of temperature regulation is improved, the energy consumption is not increased, the consumption of heat source gas of a temperature regulating heat exchanger is reduced, and the operation energy consumption of a desulfurization device is further reduced;
in some schemes, the tower structures of the pretreatment area, the temperature control area and the hydrolysis area are connected by flanges, so that the integration level of the system is improved, the overhaul difficulty is reduced, and the standardization and modularization of the fine desulfurization system are facilitated.
Drawings
FIG. 1 is a schematic diagram of an integrated device for pretreatment and hydrolysis of gas according to an embodiment of the present utility model.
Fig. 2 is a schematic view of a tube bundle of a shell and tube heat exchanger in a horizontal arrangement in accordance with an embodiment of the present utility model.
Fig. 3 is a schematic view of a plate heat exchanger according to an embodiment of the present utility model.
Detailed Description
Unless specifically stated otherwise, scientific and technical terms herein have been understood based on the knowledge of one of ordinary skill in the relevant art.
The terms top, bottom, axial, radial and the like are used herein to refer to corresponding directions or orientations in the drawings, and it is to be understood that the specific directions or orientations in the drawings are intended to be used for purposes of explanation of the present utility model, and equivalents thereof by those skilled in the art based on the present disclosure are intended to be within the scope of the present utility model.
Referring to fig. 1, the integrated device for hydrolysis reaction of blast furnace gas pretreatment agent of the utility model comprises a tower body, wherein the bottom of the tower body is provided with a gas inlet 2, the top of the tower body is provided with a hydrolysis zone outlet 703, a pretreatment zone 4, a heat exchanger A, a heating device 6 and a hydrolysis zone 7 are arranged in the tower, wherein the pretreatment zone is close to the gas inlet, the hydrolysis zone is close to the hydrolysis zone outlet, the heat exchanger A and the heating device are positioned between the pretreatment zone and the hydrolysis zone, and the heat exchanger A is positioned above or below the heating device; besides, a heat exchange generation inlet 506 and a coal gas outlet 9 are arranged on the side wall of the tower body or the side wall of the tower body where the heat exchanger A is positioned, the heat exchange generation inlet is communicated with the hydrolysis area outlet through a pipeline 8, the heat exchanger A is communicated with the heat exchange generation inlet, and the heat source of the heat exchanger A is coal gas discharged from the hydrolysis area outlet.
When the device works, the hydrolysis zone is provided with a hydrolysis agent, the pretreatment zone is provided with a pretreatment agent (the hydrolysis agent, hydrolysis reaction, adsorbent and adsorption reaction are substances and reactions which can realize hydrolysis and desulfurization adsorption of blast furnace gas, such as related substances and reactions in the prior art), the blast furnace gas enters the pretreatment zone from a gas inlet 2, the gas is subjected to pretreatment such as dechlorination, dust removal and the like, and the temperature of the pretreated gas is 35-50 ℃; the pretreated coal gas sequentially passes through a heat exchanger A5 and a heating device 6 or a heating device and a heat exchanger A, and the temperature of the coal gas is increased to be 60-90 ℃ which is suitable for the working temperature of the hydrolytic agent 7; the hydrolyzed gas with the temperature of 60-90 ℃ passes through the hydrolysis area outlet 703, the communicating pipeline 8 and the heat exchanger A5, and the hydrolyzed gas heats the gas pretreated in the tube side of the heat exchanger A5; finally, the hydrolyzed gas is discharged to the next working section through a gas outlet 9. In the process, the hydrolyzed high-temperature gas heats the pretreated gas, so that the heat of the high-temperature gas is recovered, the heat consumption of the heating device 6 is reduced, and the operation energy consumption of the gas fine desulfurization process device is further reduced.
At the beginning (when no hydrolyzed gas is generated), the pretreated gas is heated by a heating device to 60-90 ℃; after the hydrolytic gas is generated, whether a heating device is used or not is selected according to the efficiency of the heat exchanger A, so that the temperature of the pretreated gas can be raised to 60-90 ℃.
In some schemes, the side wall of the tower body where the heat exchanger A is located is provided with an exhaust port 505 and a clean exhaust port 502, the exhaust port 505 is arranged at the top of a corresponding area and used for exhausting waste gas in the area, and the clean exhaust port 502 is arranged at the lower end of the area and ensures that impurities in the heat exchanger can be completely exhausted outside the device.
In a specific scheme, the heating device can be a heat exchanger (heat exchanger B). In practical embodiments, the heat exchanger a and the heat exchanger B in the embodiments are independently selected from a rotating plate type heat exchanger or a tubular heat exchanger (generally, there are tube side structures of different forms such as spiral tubes, corrugated tubes, and finned tubes). In figures 1 and 2 there is shown a gas tube heat exchanger structure,
the two tube plates 501 and the heat exchange tubes 503 are arranged at corresponding positions in the tower, the two tube plates 501 are respectively arranged at the upper end and the lower end of the corresponding region in the tower, a plurality of through holes which are regularly arranged are arranged on the tube plates 501, the arrangement of the through holes of the two tube plates 501 is preferably consistent, and the arrangement form of the through holes can be selected as regular triangle, regular quadrangle, corner regular triangle, corner regular quadrangle and other uniform regular arrangement forms;
the heat exchange tubes 503 are respectively connected with the two tube plates 501 up and down, and the heat exchange tubes 503 penetrate through the through holes of the tube plates 501, the heat exchange tubes 503 are reliably connected with the through holes, the shell side of the heat exchanger A5 is ensured to have sufficient tightness, and the connection mode of the heat exchange tubes 503 and the through holes can be selected from expansion joint, welding and expansion welding;
in fig. 1, a tube bundle (a plurality of heat exchange tubes 503) is vertically arranged along the central axis of a cylinder B507, the tube side (inside the heat exchange tubes 503) is low-temperature gas, and the shell side (outside the heat exchange tubes 503) is high-temperature gas.
In some schemes, as shown in fig. 2, the tube bundles in the heat exchanger a can be horizontally arranged, and meanwhile, the tube plates 501 are vertically arranged, so that the tube side is high-temperature gas, and the shell side is low-temperature gas; the tube plate 501 is reliably connected with the tower body in the vertical direction; the low-temperature gas enters a shell side of a heat exchanger for heat exchange.
FIG. 3 shows a gas-gas plate heat exchanger, which is formed by welding a series of thin metal sheet heat exchange plates 510 which are parallel to each other and are punched with distance columns in a stacked manner, wherein thin rectangular channels are formed between the plates, the arrangement mode is compact, the plates are sealed by full welding, and cold and heat source gases flow through the channels to exchange heat; in the general scheme, two inlets and two outlets are connected in parallel in multiple ways; the gas plate type heat exchanger can realize higher heat exchange gas turbulence at a lower flow speed, so that the heat exchange efficiency is improved; the thickness of the heat exchange plate is generally 0.5-1.5 mm; sealing plates 511 are arranged between the upper and lower parts of the heat exchange plate 510 and the corresponding areas of the tower body, and the heat exchange plate 510 partially forms rectangular channels for heat exchange of cold and heat source gases in the area of the tower body.
In addition to the above, in some embodiments, the heat exchanger a and the heat exchanger B may be independently provided according to the disclosure in the prior art, "gas-plate heat exchanger manufacturing technology regulation local standard".
To increase the heat exchange efficiency, so that the gas uniformly passes through the heat exchanger a, in some embodiments, the heat exchange inlet is a tapered structure and the gas outlet is a tapered structure 504. Further, a plurality of baffles may be provided in the inlet or outlet of the cone-shaped structure.
Considering that the air flow in the tower can cause the heating device to vibrate, a vibration reduction assembly such as a rubber pad is arranged between the heating device and the supporting structure B thereof.
In some schemes, considering the online replacement of the hydrolytic agent and the pretreatment agent, the side walls of the tower bodies of the hydrolytic zone and the pretreatment zone are provided with loading and unloading openings. The reaction configuration of the pretreatment and hydrolysis zones of the present apparatus may preferably be axial flow and radial flow reactions. In axial flow, the pretreatment agent and the hydrolysis agent are placed on respective support grids (401, 701), respectively.
In further scheme, considering convenient equipment maintenance and repair, be equipped with a plurality of access holes 11 in proper order along top to bottom on the tower body, as shown in fig. 1, hydrolysis zone top and below are equipped with the access hole, and the preliminary treatment district top is equipped with the access hole, and import and gas outlet all are equipped with the access hole 11 in the heat exchange. In some schemes, an overhaul hanging column 10 is arranged outside the tower body.
In other schemes, in order to facilitate the installation of all components in the tower, the tower body is formed by assembling a lower sealing head 3, a cylinder A403, a cylinder B507, a cylinder C702 and an upper sealing head 3 through flanges (508/509, 402 and 704), a hydrolysis area outlet is arranged on the upper sealing head, a gas inlet is arranged on the upper sealing head, a pretreatment area is arranged in the cylinder A, a heat exchanger A is arranged in the cylinder B, a hydrolysis area is arranged in the cylinder C, a heating device 6 is arranged in the cylinder A or in the cylinder B or in the cylinder C, and a heat exchange generation inlet and a gas outlet are arranged on the cylinder B. As shown in fig. 1, the heating device 6 is horizontally arranged in the cylinder C702, and above the heat exchanger A5, the lower part of the heat exchanger B6 is provided with a support component B601; the support component B601 has enough strength and rigidity, and a plurality of damping components are arranged between the heat exchanger B6 and the support B601 to ensure the safe and stable operation of the heat exchanger B6; in a typical embodiment, the heat exchanger B6 is composed of a plurality of horizontally arranged heat exchange modules. In a further scheme, a skirt 1 fixed by foundation bolts 101 is arranged at the bottom of the tower body, and a gas inlet 2 is horizontally connected with a lower seal head 3 from a skirt barrel 102.
Claims (11)
1. The integrated device for pretreatment and hydrolysis reaction of blast furnace gas comprises a tower body and is characterized in that a gas inlet is arranged at the bottom of the tower body, and a hydrolysis area outlet is arranged at the top of the tower body; a pretreatment area, a heat exchanger A, a heating device and a hydrolysis area are sequentially arranged in the tower body from the gas inlet to the top, or the pretreatment area, the heating device, the heat exchanger A and the hydrolysis area are sequentially arranged in the tower body from the gas inlet to the top;
the side wall of the tower body is provided with a heat exchange generation inlet and a coal gas outlet, the heat exchange generation inlet is communicated with the hydrolysis area outlet, the heat exchanger A is communicated with the heat exchange generation inlet, and the heat source of the heat exchanger A is coal gas discharged from the hydrolysis area outlet.
2. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein the heating device is a heat exchanger B.
3. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 2, wherein the heat exchanger a and the heat exchanger B are independently selected from a rotary plate heat exchanger or a tubular heat exchanger.
4. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein the heating device is installed in the tower body by a supporting structure B, and a vibration reduction assembly is arranged between the heating device and the supporting structure B.
5. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein the heat exchange generating inlet is of a conical structure, and the gas outlet is of a conical structure.
6. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein the heat exchange generating inlet and the gas outlet are respectively provided with a guide plate.
7. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein the side wall of the tower body where the heat exchanger A is positioned is provided with an exhaust port and a purge port.
8. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein the side walls of the tower body of the hydrolysis zone and the pretreatment zone are provided with loading and unloading openings.
9. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein a plurality of overhauling holes are sequentially formed from top to bottom on the tower body.
10. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein a maintenance hanging column is arranged outside the tower body.
11. The integrated blast furnace gas pretreatment and hydrolysis reaction device according to claim 1, wherein the tower body is formed by assembling a lower sealing head, a cylinder A, a cylinder B, a cylinder C and an upper sealing head through flanges, the pretreatment area is positioned in the cylinder A, the heat exchanger A is positioned in the cylinder B, the hydrolysis area is positioned in the cylinder C, and the heating device is positioned in the cylinder A or in the cylinder B or in the cylinder C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321490199.1U CN220224103U (en) | 2023-06-12 | 2023-06-12 | Blast furnace gas pretreatment and hydrolysis reaction integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321490199.1U CN220224103U (en) | 2023-06-12 | 2023-06-12 | Blast furnace gas pretreatment and hydrolysis reaction integrated device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220224103U true CN220224103U (en) | 2023-12-22 |
Family
ID=89178872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321490199.1U Active CN220224103U (en) | 2023-06-12 | 2023-06-12 | Blast furnace gas pretreatment and hydrolysis reaction integrated device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220224103U (en) |
-
2023
- 2023-06-12 CN CN202321490199.1U patent/CN220224103U/en active Active
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