CN220136076U - Low-resistance high-efficiency gas precooling device - Google Patents
Low-resistance high-efficiency gas precooling device Download PDFInfo
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- CN220136076U CN220136076U CN202321135699.3U CN202321135699U CN220136076U CN 220136076 U CN220136076 U CN 220136076U CN 202321135699 U CN202321135699 U CN 202321135699U CN 220136076 U CN220136076 U CN 220136076U
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- box body
- gas
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- heat exchanger
- upper box
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- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 6
- 239000000498 cooling water Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000009849 vacuum degassing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Landscapes
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model relates to a low-resistance high-efficiency gas precooling device which comprises an upper box body, a middle box body and a lower box body which are arranged from top to bottom; a partition board (11) is arranged in the middle of the inner part of the upper box body to divide the upper box body into a left channel and a right channel; the middle box body is internally provided with a water and gas heat exchanger (12), a cooling water running pipe pass and a gas running shell pass, and a partition board (11) is also arranged in the middle of the inside of the middle box body to divide the middle box body into a left channel and a right channel; the lower box body is internally provided with a flow equalizing plate, and the lower part is provided with an ash bucket (14). The utility model has the advantages of low wind resistance, good cooling effect, durability and self-cleaning function, and can greatly reduce the inlet gas temperature of the mechanical vacuum pump and improve the air extraction efficiency.
Description
Technical Field
The utility model relates to a low-resistance high-efficiency gas precooling device, and belongs to the technical field of metallurgical vacuum.
Background
In recent decades, the novel dry mechanical vacuum pump vacuum degassing technology is increasingly applied to various large steel factories in China to replace the traditional vapor jet pump vacuum degassing technology, has the obvious advantages of water saving, energy saving, stable air suction pressure and the like, has the energy consumption of less than 10% of that of a vapor jet pump, and is mainly applied to vacuum degassing of VD, VOD, RH refining furnaces and VC vacuum pouring in the molten steel vacuum circulation degassing process.
At present, from the running condition of the existing applied dry mechanical vacuum unit in China, the overall energy-saving effect is good, but because the inlet temperature of the vacuum pump of the system is too high, the existing gas cooler cannot lower the high-temperature gas to the working condition temperature of the vacuum pump with optimal efficiency, and particularly, the dust accumulation of the internal heat exchanger increases the gas passing resistance to reduce the cooling effect, so that the air extraction efficiency of the vacuum pump is lower, frequent overhauling, cleaning and maintenance are needed, and the working efficiency of the whole system is influenced.
Under the current cooling condition of the gas cooler, the inlet temperature of the vacuum pump is generally 80 ℃ in winter and 100 ℃ in summer. The temperature of the gas inlet of the mechanical vacuum pump is 80-100, the temperature rise of each stage is calculated to 25 degrees after the pressurization of the first 3 stages of the vacuum pump, the temperature rise of the third stage is 75 degrees, the total temperature of the inlets is 80 degrees and 100 degrees, and the total temperature reaches 155-175 degrees, wherein the gas cooling device of the second-stage and third-stage intermediate pumps can only keep the inlet temperature to be equal to the exhaust temperature, the temperature of the gas inlet of the front-stage pumps is 105-125 degrees after subtracting 25 degrees multiplied by 2=50 degrees. This directly increases the backing pump gas volumetric flow: at an inlet gas temperature of 105 degrees, the volumetric flow rate increases by 7.3% over 80 degrees, which also corresponds to a direct 7.3% decrease in vacuum pumping efficiency.
Therefore, there is a need for a gas pre-cooling device that further reduces the gas inlet temperature of a mechanical vacuum pump without increasing the windage, thereby improving the pumping efficiency of the mechanical vacuum pump.
Disclosure of Invention
The utility model aims to overcome the defects and provide the gas precooling device which has the advantages of low wind resistance, good cooling effect, durability and self-cleaning function.
The purpose of the utility model is realized in the following way:
the low-resistance high-efficiency gas pre-cooling device comprises an upper box body, a middle box body and a lower box body which are arranged from top to bottom; a partition board is arranged in the middle of the inner part of the upper box body to divide the upper box body into a left channel and a right channel; the middle of the inner part of the middle box body is also provided with a baffle plate to divide the middle box body into a left channel and a right channel; the lower box body is internally provided with a flow equalizing plate, and the lower part of the lower box body is provided with an ash bucket.
Further, the top plates of the upper box bodies of the left channel and the right channel are respectively provided with an audio ash cleaner.
Further, the air source adopted by the audio ash cleaner is nitrogen or inert gas, and the pressure is 0.4MPa.
Further, the heat exchanger is a fin type heat exchanger, the fins of the heat exchanger are made of stainless steel, the thickness of the fins is not less than 2mm, and the distance between the fins is 5-10mm.
Further, the fins are welded and mounted on the base tube of the heat exchanger.
Further, a rack, an escalator and a platform are arranged on the periphery of the gas precooling device.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the upper box body and the middle box body of the gas precooling device are internally provided with the partition plates to form the left gas channel and the right gas channel, so that high-temperature flue gas passes through the heat exchanger twice for heat exchange, the heat exchange efficiency is improved, the gas cooling effect is better, and the air extraction efficiency of a subsequent mechanical vacuum pump is improved; the reinforced stainless steel fin type heat exchanger is welded and installed, so that the heat exchange area is large and the durability is good; the dust on the heat exchanger is automatically cleaned through the audio ash cleaner, so that smoothness of gas flowing through the heat exchanger is ensured, wind resistance is reduced, heat exchange effect is improved, and maintenance cleaning frequency is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a low-resistance efficient gas precooling apparatus according to the present utility model.
Wherein:
baffle 11, heat exchanger 12, audio deashing ware 13, ash bucket 14, frame 15, staircase 16, platform 17.
Detailed Description
Referring to fig. 1, the utility model relates to a low-resistance high-efficiency gas pre-cooling device, which comprises an upper box body, a middle box body and a lower box body which are arranged from top to bottom; a baffle 11 is arranged in the middle of the interior of the upper box body, the upper box body is divided into a left channel and a right channel, an audio ash remover 13 is respectively arranged on the top plate of the upper box body of the left channel and the right channel, an air source adopted by the audio ash remover 13 is nitrogen or inert gas, the pressure is 0.4MPa, and the ash removal operation period is set to 15 minutes per furnace time; the dust is not easy to accumulate between the base tube and the fins and on the surface of the heat exchanger, so that the lowest resistance and the highest heat exchange efficiency can be maintained when the gas passes through the heat exchanger;
the water and gas heat exchanger 12 is arranged in the middle box body, the cooling water passes through a tube pass and the cooling water passes through a shell pass, the heat exchanger 12 is a fin type heat exchanger and is arranged in an equilateral triangle shape, fins are made of stainless steel, the thickness of the fins is not less than 2mm, the distance between the fins is 5-10mm, the fins are welded and installed on a base tube of the fin type heat exchanger 12, the strength is high, the impact resistance is realized, more heat exchange areas are provided in the same space, the heat exchange capacity is improved, and smaller heat exchange end difference is obtained; the middle of the inner part of the middle box body is also provided with a baffle plate 11 to divide the middle box body into a left channel and a right channel;
the flow equalizing plate is arranged in the lower box body, the ash bucket 14 is arranged at the lower part of the lower box body, and the flow equalizing plate is a mesh so that the airflow flows more uniformly and smoothly, and a manual knife gate valve is arranged at the bottom of the ash bucket 14 to serve as an ash discharging valve; for convenient maintenance, a frame 15, an escalator 16 and a platform 17 are also arranged on the periphery of the gas precooling device.
The high-temperature flue gas containing carbon monoxide, which is extracted from the refining furnace, enters a gas cooler 1 from a left channel of an upper box body, enters a lower box body after heat exchange by a fin type heat exchanger, then enters a rear channel of a middle box body after stable and uniform adjustment by a flow equalizing screen, enters a right channel of the upper box body after heat exchange by the fin type heat exchanger, enters a rear filter for treatment by the gas cooler 1 from a right channel of the upper box body, and is cooled by the gas cooler 1, and then the temperature of the high-temperature flue gas is reduced from 300-400 ℃ to below 50 ℃; meanwhile, the wind speed in the lower box body is lower, and the dust with larger particles falls into the ash bucket under the action of gravity;
compared with the original cooler, after the cooling treatment of the gas cooler 1, the volume flow of the vacuum gas suction can be reduced by 7.3-14%, and the working efficiency of the vacuum pump is improved by 7-15%.
In addition: it should be noted that the above embodiment is only one of the optimization schemes of this patent, and any modification or improvement made by those skilled in the art according to the above concepts is within the scope of this patent.
Claims (6)
1. A low-resistance high-efficiency gas precooling device is characterized in that: the gas precooling device comprises an upper box body, a middle box body and a lower box body which are arranged from top to bottom; a partition board (11) is arranged in the middle of the inner part of the upper box body to divide the upper box body into a left channel and a right channel; the middle box body is internally provided with a water and gas heat exchanger (12), a cooling water running pipe pass and a gas running shell pass, and a partition board (11) is also arranged in the middle of the inside of the middle box body to divide the middle box body into a left channel and a right channel; the lower box body is internally provided with a flow equalizing plate, and the lower part is provided with an ash bucket (14).
2. The low-resistance efficient gas pre-cooling device according to claim 1, wherein: the top plates of the upper box bodies of the left channel and the right channel are respectively provided with an audio ash cleaner (13).
3. The low-resistance efficient gas pre-cooling device according to claim 2, wherein: the air source adopted by the audio ash remover (13) is nitrogen or inert gas, and the pressure is 0.4MPa.
4. The low-resistance efficient gas pre-cooling device according to claim 1, wherein: the heat exchanger (12) is a fin type heat exchanger, fins of the heat exchanger are made of stainless steel, the thickness of the fins is not less than 2mm, and the distance between the fins is 5-10mm.
5. The low-resistance efficient gas pre-cooling device according to claim 4, wherein: the fins are welded and mounted on the base pipe of the heat exchanger (12).
6. The low-resistance efficient gas pre-cooling device according to claim 1, wherein: the periphery of the gas precooling device is provided with a frame (15), an escalator (16) and a platform (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321135699.3U CN220136076U (en) | 2023-05-12 | 2023-05-12 | Low-resistance high-efficiency gas precooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321135699.3U CN220136076U (en) | 2023-05-12 | 2023-05-12 | Low-resistance high-efficiency gas precooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220136076U true CN220136076U (en) | 2023-12-05 |
Family
ID=88954620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321135699.3U Active CN220136076U (en) | 2023-05-12 | 2023-05-12 | Low-resistance high-efficiency gas precooling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220136076U (en) |
-
2023
- 2023-05-12 CN CN202321135699.3U patent/CN220136076U/en active Active
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