CN219663133U - Multifunctional heat exchanger for blast furnace gas - Google Patents
Multifunctional heat exchanger for blast furnace gas Download PDFInfo
- Publication number
- CN219663133U CN219663133U CN202320135714.8U CN202320135714U CN219663133U CN 219663133 U CN219663133 U CN 219663133U CN 202320135714 U CN202320135714 U CN 202320135714U CN 219663133 U CN219663133 U CN 219663133U
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- gas
- shell
- side wall
- heat exchanger
- blast furnace
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- 239000007788 liquid Substances 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000009792 diffusion process Methods 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 5
- 239000004071 soot Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 124
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model belongs to the technical field of blast furnace gas purification, and particularly relates to a multifunctional heat exchanger for blast furnace gas. The heat exchange device for the blast furnace gas comprises a shell, a cooling device, a demisting device and a heating device; the cooling device, the demisting device and the heating device are sequentially arranged on the gas passage along the gas path direction; a first gap is arranged between the cooling device and the demisting device, and a second gap is arranged between the demisting device and the heating device; a first access hole is formed in the side wall of the shell where the first gap is; and a second access hole is formed in the side wall of the shell where the second gap is located. The device reduces pipelines and auxiliary equipment between the heat exchanger and the separator, reduces the cost of arranging the gas-liquid separator, improves the heat exchange and separation efficiency, and reduces the equipment failure rate; the occupied area is reduced as a whole; meanwhile, two cavities are reserved in the device, and an operation space is reserved for maintenance personnel.
Description
Technical Field
The utility model belongs to the technical field of blast furnace gas purification, and particularly relates to a multifunctional heat exchanger for blast furnace gas.
Background
At present, the industries of chemical industry, steel, power generation and the like require strict emission of pollutants such as tail gas dust, SO2, NOx and the like.
In the steel industry, the fuel used by the blast furnace hot blast stove is mainly blast furnace gas, and the blast furnace gas contains a large amount of organic sulfur and inorganic sulfur, and cannot meet the emission requirement after combustion. It is therefore necessary to treat both organic and inorganic sulfur in blast furnace gas.
Compared with the existing terminal dispersion treatment technology, the technology of carrying out concentrated and refined desulfurization of the source before the terminal combustion is utilized is an important measure for green upgrading of the iron and steel industry; the source fine desulfurization adopts a catalyst to convert and adsorb sulfur, but the working condition of the hydrolytic agent requires a certain temperature and no liquid water, and the catalyst is deactivated in the subsequent hydrolysis process when the temperature exceeds a certain temperature and the liquid water, so that the blast furnace gas needs to be pretreated before entering a hydrolysis tower, in particular, the gas is reduced to a certain temperature, and the liquid water in the gas is removed.
The prior pretreatment technology generally adopts a heat exchanger gas-liquid centrifugal separator to meet the use condition of a hydrolytic agent, and the whole system is complex, large in occupied area, low in heat exchange efficiency, high in failure rate and higher in construction cost and operation cost.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the utility model provides a multifunctional heat exchanger for blast furnace gas.
Therefore, the multifunctional heat exchanger for blast furnace gas provided by the utility model comprises a shell, a cooling device, a demisting device and a heating device; the shell is internally provided with a gas passage, the shell is provided with a gas inlet and a gas outlet, and the gas inlet and the gas outlet are respectively arranged at two ends of the gas passage; the direction from the gas inlet to the gas outlet in the gas passage is the gas passage direction; the top or/and the bottom of the shell of the gas passage is/are provided with a gas scattering port and an ash discharge liquid outlet;
the cooling device, the demisting device and the heating device are sequentially arranged on the gas passage along the gas path direction; a first gap is arranged between the cooling device and the demisting device, and a second gap is arranged between the demisting device and the heating device; a first access hole is formed in the side wall of the shell where the first gap is; and a second access hole is formed in the side wall of the shell where the second gap is located.
In an alternative scheme, a first gas diffusion opening is formed in the top of the shell of the gas passage section where the first gap is located, and a second gas diffusion opening is formed in the top of the shell of the gas passage section where the second gap is located.
In the alternative scheme, a first ash discharge liquid outlet is arranged at the bottom of the shell of the gas passage section where the first gap is located, and a second ash discharge liquid outlet is arranged at the bottom of the shell of the gas passage section where the second gap is located. In a further alternative, the first ash discharge outlet and the second ash discharge outlet are communicated and share an outlet through a pipeline, and the pipeline is positioned outside the shell.
In an alternative scheme, a third gas diffusion opening is arranged on the side wall of the shell of the gas passage section where the cooling device is positioned; a fourth gas diffusion opening is arranged on the side wall of the shell of the gas passage section where the demisting device is positioned; a fifth gas diffusion opening is arranged on the side wall of the shell of the gas passage section where the heating device is located.
In an alternative scheme, a first liquid outlet is arranged on the side wall of the shell of the gas passage section where the cooling device is positioned, and the first liquid outlet is positioned at the bottom of the cooling device; the side wall of the shell of the gas passage section where the demisting device is positioned is provided with a second liquid outlet, and the second liquid outlet is positioned at the bottom of the demisting device; the side wall of the shell of the gas passage section where the heating device is located is provided with a third liquid outlet, and the liquid outlet is positioned at the bottom of the heating device.
In an alternative scheme, the demister comprises a wire mesh demister and a baffle demister, and the wire mesh demister and the baffle demister are sequentially arranged along the air path direction.
In an alternative scheme, the cooling device is a tubular heat exchange device, and a cooling medium inlet and a cooling area medium outlet which are communicated with the tubular heat exchange device are arranged on the side wall of the shell of the corresponding gas passage section.
In an alternative scheme, the heating device is a plate heat exchange device, and a heat medium inlet and a heat medium outlet which are communicated with the plate heat exchange device are arranged on the side wall of the shell of the corresponding gas passage section.
In an alternative scheme, the heat medium inlet is provided with a conical section inlet, and a small diameter opening of the conical section inlet is far away from the shell; the heat medium outlet is provided with a conical section outlet, and a small diameter opening of the conical section outlet is far away from the shell.
In an alternative scheme, the gas inlet on the shell is a reducing section, and the inner diameter of the gas inlet is increased along the direction of the gas path; the gas outlet on the shell is a reducing section, and the inner diameter of the gas inlet is reduced along the direction of the gas path.
In an alternative scheme, a third overhaul port and a soot blower interface are arranged on the side wall of the shell where the gas inlet is positioned; and a fourth overhaul hole is formed in the side wall of the shell where the gas outlet is located.
The device reduces pipelines and auxiliary equipment between the heat exchanger and the separator, omits the cost of arranging the gas-liquid separator, improves the heat exchange and separation efficiency, and reduces the equipment failure rate; the occupied area is reduced as a whole. Meanwhile, two cavities are reserved in the device, and an operation space is reserved for maintenance personnel.
In the preferred scheme, the middle part of the device is provided with the wire mesh demister and the baffle demister, the front end firstly uses the wire mesh demister to remove larger liquid drops in main gas, then the main gas passes through the baffle at the rear end, the tiny liquid drops are attached to the baffle and continuously gathered, the main gas descends to the bottom of the heat exchanger to be discharged under the action of gravity, and the two-stage demisting ensures that liquid water in the gas is sufficiently removed, thereby meeting the requirements of a hydrolysis procedure at the rear end; the arrangement of the baffle plate can increase the turbulence degree of the gas at the rear end and improve the heat exchange efficiency; the liquid water at the front end is fully removed, the gas reaches the temperature rising section and is very dry, no liquid drops are attached to the heat exchange plate, and the heat exchange efficiency is improved.
Drawings
FIG. 1 is a schematic top view of the apparatus of the present utility model;
FIG. 2 is a schematic diagram of the front view of the device of the present utility model;
fig. 3 is a schematic view of the internal structure of the device of the present utility model.
Detailed Description
Unless specifically stated otherwise, the terms herein are to be understood based on knowledge of one of ordinary skill in the relevant art.
The housing side walls as used herein refer to the walls that make up the housing, including the housing bottom and top side walls. The terms bottom, top and the like are consistent with the corresponding directions or orientations in the drawings of the specification, and it should be noted that the specific directions and orientations in the drawings are intended to be used for explaining the present utility model, and are not limited to the solutions herein, and those skilled in the art may perform equivalent rotation, turning and the like on the basis thereof.
The present utility model will be described in further detail with reference to the accompanying drawings and examples, and it should be understood that the utility model is not limited to the following specific examples, but is capable of equally transforming on the basis of the technical scheme of the utility model within the scope of the utility model.
Referring to fig. 1 to 3, the blast furnace gas pretreatment apparatus of the present utility model comprises: a shell, a cooling device 3, a demisting device 4 and a heating device 5; wherein, a gas passage is arranged in the shell, a gas inlet 1 and a gas outlet 2 are arranged on the shell, and the gas inlet and the gas outlet are respectively arranged at two ends of the gas passage; the direction from the gas inlet to the gas outlet in the gas passage is the gas passage direction; a gas scattering port and an ash discharge liquid outlet are arranged on the side wall of the shell of the gas passage;
the cooling device, the demisting device and the heating device are sequentially arranged on the gas passage along the gas passage direction; a first gap 6 is arranged between the cooling device and the demisting device, and a second gap 7 is arranged between the demisting device and the heating device; a first access hole 162 is formed in the side wall of the shell where the first gap is; a second access hole 163 is formed in the side wall of the shell where the second gap is located.
The high-temperature gas (100 ℃ -120 ℃) to be treated enters a gas passage through a gas inlet, is cooled to 30+/-5 ℃ through a cooling device, condensed water drops in the gas are removed through a demister, the temperature of the demisted dry gas is about 30+/-5 ℃, then the low-temperature gas is heated to 80+/-5 through a heating device so as to meet the requirements of a rear-end hydrolysis process, and finally is discharged through a gas outlet 2 and enters a subsequent treatment device such as a hydrolysis tower; condensed water generated by the cooling section and liquid drops collected by the demister can be discharged through an ash discharge liquid outlet;
wherein, the first gap and the second gap and the maintenance holes arranged on the first gap and the second gap are convenient for maintaining the equipment in the shell; and the gas in the shell is exhausted through the gas emission port before maintenance, so that the safety of maintenance operation is ensured.
In still other embodiments, in order to ensure that the gas and non-condensable gases in the housing are completely removed before maintenance, gas discharge ports are provided at different positions of the device, for example, a first gas discharge port 121 is provided on a side wall of the housing of the gas passage section where the first gap is located, and a second gas discharge port 122 is provided on a side wall of the housing of the gas passage section where the second gap is located. Also for example, a third gas discharge port 131 is arranged on the side wall of the shell of the gas passage section where the cooling device is positioned; a fourth gas diffusion opening 132 is arranged on the side wall of the shell of the gas passage section where the demisting device is positioned; a fifth gas diffusion opening 133 is arranged on the side wall of the shell of the gas passage section where the heating device is positioned.
In still other embodiments, in order to ensure that the liquid or the ash in different parts of the housing is effectively removed before the overhaul, a liquid outlet or an ash discharge liquid outlet is disposed at different positions of the device, for example, a first ash discharge liquid outlet 141 is disposed on a side wall of the housing of the gas passage section where the first gap is located, and a second ash discharge liquid outlet 142 is disposed on a side wall of the housing of the gas passage section where the second gap is located. In the concrete scheme, in order to conveniently collect the lime-ash, first row ash leakage fluid dram and second row ash leakage fluid dram pass through pipeline intercommunication sharing export, communicating pipe is located the casing outside. For example, a first liquid outlet 134 is arranged on the side wall of the shell of the gas passage section where the cooling device is positioned, and the first liquid outlet is positioned at the bottom of the cooling device; a second liquid outlet 135 is arranged on the side wall of the shell of the gas passage section where the demisting device is positioned, and the second liquid outlet is positioned at the bottom of the demisting device; a third liquid outlet 136 is arranged on the side wall of the shell of the gas passage section where the heating device is located, and the liquid outlet is located at the bottom of the heating device.
In a specific scheme, the cooling device can be selected from the existing related devices suitable for the gas passage, for example, the cooling device is a tubular heat exchange device 17, and a cooling medium inlet and a cooling area medium outlet (8, 9) which are communicated with the tubular heat exchange device are arranged on the side wall of the shell of the corresponding gas passage section. For example, the tube type heat exchange device can be a countercurrent finned tube, circulating cooling water and main gas are subjected to countercurrent indirect heat exchange, and vapor in the gas is subjected to phase change condensation. In a specific embodiment, the cooling medium is water.
In the specific scheme, in order to sufficiently remove liquid drops in the coal gas, the demister in the device comprises a wire mesh demister 18 and a baffle demister 19, and the wire mesh demister and the baffle demister are sequentially arranged along the direction of a gas path, so that the wire mesh demister is arranged at the front end of a condensation demisting section to remove larger liquid drops in the coal gas in a cooling section, the baffle demister is arranged at the rear end to intercept small liquid drops in the coal gas, the turbulence degree of a heating section is increased, and the heat exchange efficiency is improved.
In a specific scheme, the heating device of the utility model can be selected from the existing related devices suitable for the gas passage, for example, the heating device is selected from a plate heat exchange device 20, and a heat medium inlet and a heat medium outlet (10, 11) which are communicated with the plate heat exchange device are arranged on the side wall of the shell of the corresponding gas passage section. In a further aspect, the heat medium inlet is provided with a conical section inlet 221, and a small diameter opening of the conical section inlet is far away from the shell; the heat medium outlet is provided with a conical section outlet 222, and the small diameter opening of the conical section outlet is far away from the shell. In some specific schemes, the heat medium in the heating device can be used for introducing high-temperature auxiliary gas in the gas pipe network, and the high-temperature gas and the low-temperature gas in the heating device exchange heat, so that the waste heat of the high-temperature gas is fully utilized, the energy waste is reduced, and the cost is saved.
In some preferred schemes, in order to facilitate the gas entering and discharging, the gas inlet 211 on the device is a reducing section, and the inner diameter of the gas inlet is increased along the direction of the gas path; the gas outlet 212 on the shell is a reducing section, and the inner diameter of the gas inlet is reduced along the direction of the gas path, so that the flow channel of the gas is enlarged after the gas enters the heat exchanger, the gas is rapidly diffused and uniformly dispersed into the heat exchange cavity to be fully contacted with the heat exchange surface, the dead zone is reduced, and the heat exchange efficiency is improved. In a further preferred scheme, a third overhaul hole 161 and a soot blower interface 15 are arranged on the side wall of the shell where the gas inlet is positioned, and when the dust content in the main gas is increased, a soot blower can be used for removing dust accumulated in the cold area device; a fourth access hole 164 is formed in the side wall of the shell where the gas outlet is located, and is used for maintaining the environment in the section.
Claims (12)
1. A multifunctional heat exchanger for blast furnace gas, comprising:
the gas inlet and the gas outlet are respectively arranged at two ends of the gas passage; the direction from the gas inlet to the gas outlet in the gas passage is the gas passage direction; a gas scattering port and an ash discharge liquid outlet are arranged on the side wall of the shell of the gas passage;
a cooling device (3);
a demisting device (4);
and, a heating device (5);
the cooling device, the demisting device and the heating device are sequentially arranged on the gas passage along the gas path direction; a first gap (6) is arranged between the cooling device and the demisting device, and a second gap (7) is arranged between the demisting device and the heating device; a first access hole (162) is formed in the side wall of the shell where the first gap is; and a second access hole (163) is formed in the side wall of the shell where the second gap is located.
2. The multifunctional heat exchanger for blast furnace gas according to claim 1, wherein a first gas diffusing opening (121) is arranged on the side wall of the shell of the gas passage section where the first gap is located, and a second gas diffusing opening (122) is arranged on the side wall of the shell of the gas passage section where the second gap is located.
3. The multifunctional heat exchanger for blast furnace gas according to claim 1 or 2, wherein a first ash discharge liquid outlet (141) is arranged at the bottom of the shell of the gas passage section where the first gap is located, and a second ash discharge liquid outlet (142) is arranged at the bottom of the shell of the gas passage section where the second gap is located.
4. A multifunctional heat exchanger for blast furnace gas according to claim 3, wherein the first ash discharge liquid outlet and the second ash discharge liquid outlet are communicated and share one outlet through a pipeline, and the pipeline is positioned outside the shell.
5. The multifunctional heat exchanger for blast furnace gas according to claim 1, wherein a third gas diffusing port (131) is arranged on the side wall of the shell of the gas passage section where the cooling device is located; a fourth gas scattering port (132) is arranged on the side wall of the shell of the gas passage section where the demisting device is positioned; a fifth gas diffusion opening (133) is arranged on the side wall of the shell of the gas passage section where the heating device is located.
6. The multifunctional heat exchanger for blast furnace gas according to claim 1, wherein a first liquid outlet (134) is arranged on the side wall of the shell of the gas passage section where the cooling device is positioned, and the first liquid outlet is positioned at the bottom of the cooling device; a second liquid outlet (135) is arranged on the side wall of the shell of the gas passage section where the demisting device is positioned, and the second liquid outlet is positioned at the bottom of the demisting device; a third liquid outlet (136) is arranged on the side wall of the shell of the gas passage section where the heating device is located, and the liquid outlet is located at the bottom of the heating device.
7. The multifunctional heat exchanger for blast furnace gas according to claim 1, wherein the demister comprises a wire mesh demister (18) and a baffle demister (19), which are arranged in sequence along the gas path direction.
8. The multifunctional heat exchanger for blast furnace gas according to claim 1, wherein the cooling device is a tubular heat exchanger (17), and the side wall of the shell of the corresponding gas passage section is provided with a cooling medium inlet and a cooling medium outlet (8, 9) which are communicated with the tubular heat exchanger.
9. The multifunctional heat exchanger for blast furnace gas according to claim 1, wherein the heating device is a plate heat exchanger (20), and the side wall of the shell of the corresponding gas passage section is provided with a heat medium inlet and a heat medium outlet (10, 11) which are communicated with the plate heat exchanger.
10. The multifunctional heat exchanger for blast furnace gas according to claim 9, wherein the heat medium inlet is provided with a conical section inlet (221), and the small diameter opening of the conical section inlet is far away from the shell; the heat medium outlet is provided with a conical section outlet (222), and a small diameter opening of the conical section outlet is far away from the shell.
11. The multifunctional heat exchanger for blast furnace gas according to claim 1, wherein the gas inlet (1) on the housing is a variable diameter section, and the inner diameter of the gas inlet is increased along the gas path direction; the gas outlet (2) on the shell is a reducing section, and the inner diameter of the gas outlet is reduced along the direction of the gas path.
12. The multifunctional heat exchanger for blast furnace gas according to claim 11, wherein a third overhaul port (161) and a soot blower interface (15) are arranged on the side wall of the shell where the gas inlet is positioned; and a fourth overhaul hole (164) is formed in the side wall of the shell where the gas outlet is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320135714.8U CN219663133U (en) | 2023-01-17 | 2023-01-17 | Multifunctional heat exchanger for blast furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320135714.8U CN219663133U (en) | 2023-01-17 | 2023-01-17 | Multifunctional heat exchanger for blast furnace gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219663133U true CN219663133U (en) | 2023-09-12 |
Family
ID=87925319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320135714.8U Active CN219663133U (en) | 2023-01-17 | 2023-01-17 | Multifunctional heat exchanger for blast furnace gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219663133U (en) |
-
2023
- 2023-01-17 CN CN202320135714.8U patent/CN219663133U/en active Active
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