CN212515489U - Integrated humidifying system for adjusting dew point - Google Patents
Integrated humidifying system for adjusting dew point Download PDFInfo
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- CN212515489U CN212515489U CN202021817987.3U CN202021817987U CN212515489U CN 212515489 U CN212515489 U CN 212515489U CN 202021817987 U CN202021817987 U CN 202021817987U CN 212515489 U CN212515489 U CN 212515489U
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- pipeline
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- dew point
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 202
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 100
- 239000007789 gas Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 4
- 239000008236 heating water Substances 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 21
- 239000011701 zinc Substances 0.000 description 21
- 229910052725 zinc Inorganic materials 0.000 description 21
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses an integrated humidifying system for adjusting dew point, which comprises a nitrogen supply pipeline, a wet nitrogen pipeline, a humidifying tank filled with water, a pipeline mixer and a mixed gas pipeline; the first branch of the nitrogen supply pipeline is a dry nitrogen pipeline which is communicated with the inlet of the pipeline mixer; the second branch of the nitrogen supply pipeline is communicated with the humidifying tank, dry nitrogen in the humidifying tank is humidified by water to be wet nitrogen and is gathered at the upper part of the humidifying tank, the upper part of the humidifying tank is communicated with the inlet of the wet nitrogen pipeline, and the outlet of the wet nitrogen pipeline is communicated with the inlet of the pipeline mixer; the outlet of the pipeline mixer is communicated with the inlet of the mixed gas pipeline, and the outlet of the mixed gas pipeline supplies the mixed gas to the upper surface and the lower surface of the furnace nose through two branch pipelines respectively. The utility model has the advantages that: the pipeline mixer is additionally arranged, so that the uniform and rapid mixing of the dry and wet atmosphere can be effectively promoted, the influence of high-pressure gas on the flowing and mixing of low-pressure gas is avoided, and the dew point adjusting performance is improved.
Description
Technical Field
The utility model relates to a belted steel rolling technical field, concretely relates to an integration humidification system for adjusting dew point.
Background
When the zinc liquid in the zinc pot is heated to a certain temperature or the strip steel enters the zinc pot from the continuous annealing furnace through the furnace nose to cause the temperature of the contact part with the zinc liquid surface to be higher, the zinc liquid surface can continuously volatilize zinc vapor. The zinc steam is condensed in the furnace area and gradually thickens along with the time extension, and under the influence of unstable factors such as vibration or furnace pressure fluctuation, the gradually thickened zinc ash loosens and falls on the upper surface of the strip steel and adheres to the surface of the strip steel to form an alloy layer, so that the defect of zinc ash on the surface of the strip steel in a certain area is caused. In order to solve the problem, the temperature of the strip steel before entering the zinc pot and the temperature in the furnace nose are controlled, or a humidifying device is additionally arranged in the furnace nose to inhibit the volatilization of zinc vapor.
Traditional nitrogen gas humidification device adopts directly to let in the stove nose point after the nitrogen gas humidification, has following defect:
(1) the flow of nitrogen introduced into the furnace nose tip is not intelligently controlled, and a rough gas filling mode is adopted, so that the effect of inhibiting zinc steam is general, and the waste of nitrogen is large.
(2) Wet nitrogen enters a humidifying tank and is discharged through water, a dry nitrogen pipeline system is not added, the resistance loss of the wet nitrogen is larger than that of the dry nitrogen, the pressure difference between the wet nitrogen and the dry nitrogen is caused during mixing, so that the wet nitrogen cannot be well mixed with the dry nitrogen, and the dew point adjusting performance of the system is greatly weakened.
(3) After the dry nitrogen and the wet nitrogen are mixed, the mixed gas is reheated without a pipeline heater, so that the temperature of the mixed gas is too low relative to the temperature of zinc steam when the mixed gas is introduced into the nose tip of the furnace, the zinc steam is condensed, and the surface quality of the strip steel is adversely affected.
(4) After the dry nitrogen and the wet nitrogen are mixed, the temperature is kept as stable as possible only by using a heat insulation material, but the effect is very common.
Therefore, there is a need for improvements in the prior art.
Disclosure of Invention
An object of the utility model is to provide a to prior art not enough, provide an integration humidification system for adjusting dew point.
The utility model adopts the technical proposal that: an integrated humidifying system for adjusting dew point comprises a nitrogen supply pipeline, a wet nitrogen pipeline, a humidifying tank filled with water, a pipeline mixer and a mixed gas pipeline; the first branch of the nitrogen supply pipeline is a dry nitrogen pipeline which is communicated with the inlet of the pipeline mixer; the second branch of the nitrogen supply pipeline is communicated with the humidifying tank, dry nitrogen in the humidifying tank is humidified by water to be wet nitrogen and is gathered at the upper part of the humidifying tank, the upper part of the humidifying tank is communicated with the inlet of the wet nitrogen pipeline, and the outlet of the wet nitrogen pipeline is communicated with the inlet of the pipeline mixer; the outlet of the pipeline mixer is communicated with the inlet of the mixed gas pipeline, the outlet of the mixed gas pipeline supplies mixed gas to the upper surface and the lower surface of the furnace nose through two branch pipelines respectively, and a dew point instrument for detecting dew points is arranged in the furnace nose; flow detection elements, a flow regulating valve, a dry bulb temperature sensor and a wet bulb temperature sensor are respectively arranged on the dry nitrogen pipeline and the wet nitrogen pipeline, and the flow detection elements, the sensors, the flow regulating valve, the dew-point instrument and the pipeline heater are respectively connected with the PLC.
According to the scheme, the dry nitrogen pipeline and the wet nitrogen pipeline are respectively provided with a pressure detection element connected with the PLC, and the outlet of the dry nitrogen pipeline is provided with a pressure reducing valve.
According to the scheme, the pipeline heater connected with the PLC is arranged on the mixed gas pipeline.
According to the scheme, the wet nitrogen pipeline and the mixed gas pipeline are respectively provided with a pipeline heat tracing structure.
According to the scheme, the outlet of the second branch and the wet nitrogen pipeline are respectively provided with a check valve.
According to the scheme, the top of the humidifying tank is communicated with a water inlet pipe provided with a water replenishing electromagnetic valve, and the bottom of the humidifying tank is communicated with a drain pipe provided with a drain electromagnetic valve; the humidifying tank is additionally provided with a heater for heating water and a temperature sensor for detecting the temperature of the water, and the heater, the temperature sensor, the water replenishing electromagnetic valve and the water discharging electromagnetic valve are respectively connected with the PLC.
According to the scheme, the humidifying tank is also provided with a pressure sensor for detecting the pressure of nitrogen, and the top of the humidifying tank is provided with a safety relief valve; and the pressure sensor is connected with the PLC.
According to the scheme, the humidifying tank is also provided with a liquid level meter for detecting the liquid level.
The utility model has the advantages that: 1. the utility model is provided with pressure detecting elements connected with the PLC controller on the dry and wet nitrogen pipeline and a pressure reducing valve at the outlet of the dry and wet nitrogen pipeline, which can keep the pressure of the dry and wet gases consistent before mixing; and, set up the line mixer, can effectively promote the even rapid mixing of dry and wet atmosphere, avoid high pressure gas to influence the flow and the mixture of low pressure gas, improved dew point regulation performance. 2. The utility model discloses set up pipeline companion's heat structure on wet nitrogen pipeline and gas mixture pipeline respectively, can reduce gaseous on-the-way temperature decline. 3. The utility model discloses adjust the precision height, response speed is fast.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
An integrated humidification system for dew point adjustment as shown in fig. 1 comprises a nitrogen supply line 1, a wet nitrogen line, a humidification tank 15 filled with water, a pipe mixer 26 and a mixed gas line 28; the first branch of the nitrogen supply line 1 is a dry nitrogen line 11, which communicates with the inlet of the line mixer 26; the second branch of the nitrogen supply pipeline 1 is communicated with the humidifying tank 15, dry nitrogen in the nitrogen supply pipeline is humidified by water to be wet nitrogen and is gathered at the upper part of the humidifying tank 15, the upper part of the humidifying tank 15 is communicated with the inlet of the wet nitrogen pipeline, and the outlet of the wet nitrogen pipeline is communicated with the inlet of the pipeline mixer 26; the outlet of the pipeline mixer 26 is communicated with the inlet of a mixed gas pipeline, the outlet of the mixed gas pipeline supplies mixed gas to the upper surface and the lower surface of the furnace nose through two branch pipelines respectively, and a dew-point instrument 29 for detecting dew points is arranged in the furnace nose; the dry nitrogen pipeline 4 and the wet nitrogen pipeline are respectively provided with a flow detection element, a flow regulating valve, a dry bulb temperature sensor and a wet bulb temperature sensor, and the flow detection elements, the sensors, the flow regulating valve, the dew-point instrument 29 and the pipeline heater are respectively connected with the PLC.
Preferably, the dry nitrogen pipeline 4 and the wet nitrogen pipeline are respectively provided with a pressure detection element connected with the PLC, and the outlet of the dry nitrogen pipeline 4 is provided with a pressure reducing valve. In the embodiment, the pressure detection element and the pressure reducing valve which are respectively arranged on the dry and wet nitrogen pipeline can keep the pressure of the dry and wet gas basically consistent before the dry and wet gas is mixed; on the other hand, the added pipeline mixer 26 can effectively promote the uniform and rapid mixing of the dry and wet atmosphere, and avoid the influence of high-pressure gas on the flowing and mixing of low-pressure gas.
Since the temperature of the mixed gas is low relative to the temperature of the zinc vapor, the zinc vapor is condensed due to the temperature difference after the mixed gas is introduced into the nose tip, and a pipe heater 29 connected to the PLC controller is disposed on the mixed gas pipe 28. The power of the pipeline heater 29 is controlled by the PLC controller, and the mixed gas is directly heated to be heated to a certain temperature, so that the zinc steam (the temperature is 460 ℃) is prevented from being condensed at the nose tip of the furnace due to large temperature difference, and the surface quality of the strip steel is prevented from being influenced.
Preferably, a check valve 14 is arranged at the outlet of the second branch, and a check valve 25 is additionally arranged at the outlet of the wet nitrogen pipeline; the wet nitrogen line and the mixed gas line 28 are respectively provided with a pipeline heat tracing structure 21 to keep the pipeline temperature as stable as possible along the pipeline.
Preferably, the top of the humidifying tank 15 is communicated with a water inlet pipe 31 provided with a water replenishing electromagnetic valve 32, and the bottom of the humidifying tank 15 is communicated with a water outlet pipe 33 provided with a water draining electromagnetic valve; the humidifying tank 15 is additionally provided with a heater 16 (which can be an electric heater) for heating water and a temperature sensor 18 for detecting the temperature of the water, and the heater 16, the temperature sensor 18, the water supplementing electromagnetic valve 32 and the water discharging electromagnetic valve are respectively connected with a PLC (programmable logic controller).
Preferably, the humidifying tank 15 is further provided with a pressure sensor 19 for detecting the pressure of the nitrogen, and the top of the humidifying tank 15 is provided with a safety relief valve 20; the pressure sensor 19 is connected with the PLC controller.
Preferably, the humidification tank 15 is further provided with a liquid level meter for detecting a liquid level. In this embodiment, the liquid level meter may be a magnetic flip plate liquid level meter 17.
In this embodiment, a main solenoid valve is configured on the nitrogen supply pipeline 1, the nitrogen supply pipeline 1 is connected to the two branches behind the system, the first branch does not pass through the humidification tank 15 and is a dry nitrogen pipeline 4, and a pressure regulating valve 5, a flowmeter 6, a flow regulating valve 7, a dry nitrogen pressure detecting element 8, a dry bulb temperature sensor 9 and a wet bulb temperature sensor 10 are correspondingly configured on the dry nitrogen pipeline; the second branch 11 is provided with a flow meter 12, a flow rate regulating valve 13, and a check valve 14. The dry nitrogen in the second branch 11 enters the humidifying tank 15, is humidified and then enters the wet nitrogen pipeline, and the wet nitrogen pipeline is provided with a pipeline heat tracing structure 21, a nitrogen pressure detection element 22, a dry bulb temperature sensor 23, a wet bulb temperature sensor 24 and a check valve 25. Each dry bulb temperature sensor and each wet bulb temperature sensor are respectively used for detecting the dry bulb temperature and the wet bulb temperature of the gas on the corresponding pipeline. The nitrogen in the dry nitrogen pipeline 4 and the wet nitrogen in the wet nitrogen pipeline are uniformly mixed in the pipeline mixer 26 and then enter the mixed gas pipeline 28, and the gas-water separator 27, the pipeline heater 29 and the electromagnetic valve for controlling on-off are sequentially arranged on the mixed gas pipeline 28. The pipe heater 29 is set to be in a normally open mode, and when the system stops running, the pipe heater 29 is automatically closed to prevent dry burning. The pipeline heat tracing structure 21 can adopt electric heat tracing, steam heat tracing and other heat tracing modes, and the power of the electric heat tracing is adjusted according to signals sent by a receiving controller.
The utility model discloses a theory of operation does: the PLC adjusts the flow regulating valve of the dry nitrogen and the flow regulating valve of the wet nitrogen according to the dew point target value measured by the dew point meter 29 and by combining the dry ball temperature and the dew point temperature of the dry nitrogen, the dry ball temperature and the dew point temperature of the wet nitrogen and the like, until the gas dew point flowing out of the mixed gas pipeline is consistent with the dew point target value, and the integral adjustment of the dew point is realized. In the process of adjusting the dew point, the power of the heater in the humidifying tank 15, the pipeline heater 29 and the external heat tracing structure 21 is adjusted in real time, and the dew point control is rapid and accurate, so that the generation of zinc ash in the furnace nose is effectively inhibited.
Temperature adjustment of the humidification tank 15: the PLC receives the temperature signal transmitted by the temperature sensor 18, converts the temperature signal into a control signal and transmits the control signal to the heater 16, so as to heat the water in the humidifying tank 15.
And (4) liquid level adjustment of the humidifying tank 15: a magnetic turning plate liquid level meter 17 is arranged, and after the magnetic turning plate liquid level meter 17 transmits and transmits the liquid level, the PLC correspondingly controls the opening and closing of the water replenishing electromagnetic valve 32 and the water discharging electromagnetic valve so as to adjust the liquid level; the water inlet and the water outlet of the humidifying tank are respectively completed by a water inlet pipe 31 and a water outlet pipe 33.
Pressure adjustment of the humidification tank 15: the humidifying tank 15 is provided with a safety pressure relief valve 20, and when the pressure sensor 19 detects that the pressure in the humidifying tank 15 exceeds the upper limit value of the safety pressure, the safety pressure relief valve 20 is automatically opened to relieve the pressure so as to ensure the stable operation of the whole system.
The power of the pipeline heat tracing structure 21 is adjusted: in order to reduce the temperature drop of the mixed gas along the way as much as possible, the wet nitrogen pipeline and the mixed gas pipeline 28 are respectively provided with a pipeline heat tracing structure 21. The PLC controller adjusts the power of the heat tracing structure 21 through the temperature of the mixed dry and wet nitrogen.
Power regulation of the pipe heater 29: because the temperature of the mixed gas is very low relative to the temperature of the zinc steam, the zinc steam is condensed due to a large temperature difference after the mixed gas is introduced into the nose tip of the furnace, and therefore, the mixed gas is reheated by using the pipeline heater 29 before entering the nose tip of the furnace.
Safe and stable operation control:
(1) when the hot galvanizing unit is abnormal or overhauled, the electromagnetic valves on the main pipeline and the mixed gas pipeline 28 are powered off and closed, so that the zinc steam backflow is prevented from influencing the relevant equipment of the humidification system; the nitrogen pressure sensing element 8, the wet nitrogen pressure sensing element 22 and the pipeline mixer 26 are arranged to realize uniform, rapid and sufficient mixing when the gases are mixed.
(2) When the liquid level in the humidification tank 15 is lower than the lower limit, the heater 16 is cut off and the water inlet pipe 31 is replenished to avoid dry burning of the heater 16.
(3) When the liquid level in the humidification tank 15 is higher than the upper limit, the water inlet pipe 31 is closed, and the water outlet pipe 33 discharges water.
(4) When the internal pressure of the humidifying tank 15 is higher than the upper limit, the pressure relief is automatically opened.
(5) The pipe heater 29 on the mixed gas pipe 28 is set to be in a normally open mode, and when the system stops running, the pipe heater 29 is automatically closed to prevent dry burning.
Finally, it should be noted that the above detailed description is only for illustrating the technical solutions of the present patent and not for limiting, and although the present patent is described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present patent without departing from the spirit and scope of the technical solutions of the present patent, which should be covered by the claims of the present invention.
Claims (8)
1. An integrated humidifying system for adjusting dew point is characterized by comprising a nitrogen supply pipeline, a wet nitrogen pipeline, a humidifying tank filled with water, a pipeline mixer and a mixed gas pipeline; the first branch of the nitrogen supply pipeline is a dry nitrogen pipeline which is communicated with the inlet of the pipeline mixer; the second branch of the nitrogen supply pipeline is communicated with the humidifying tank, dry nitrogen in the humidifying tank is humidified by water to be wet nitrogen and is gathered at the upper part of the humidifying tank, the upper part of the humidifying tank is communicated with the inlet of the wet nitrogen pipeline, and the outlet of the wet nitrogen pipeline is communicated with the inlet of the pipeline mixer; the outlet of the pipeline mixer is communicated with the inlet of the mixed gas pipeline, the outlet of the mixed gas pipeline supplies mixed gas to the upper surface and the lower surface of the furnace nose through two branch pipelines respectively, and a dew point instrument for detecting dew points is arranged in the furnace nose; flow detection elements, a flow regulating valve, a dry bulb temperature sensor and a wet bulb temperature sensor are respectively arranged on the dry nitrogen pipeline and the wet nitrogen pipeline, and the flow detection elements, the sensors, the flow regulating valve, the dew-point instrument and the pipeline heater are respectively connected with the PLC.
2. The integrated humidification system for adjusting the dew point as claimed in claim 1, wherein the dry nitrogen line and the wet nitrogen line are respectively provided with a pressure detecting element connected with a PLC controller, and an outlet of the dry nitrogen line is provided with a pressure reducing valve.
3. An integrated humidification system for dew point adjustment as claimed in claim 1 wherein a pipe heater is provided on the mixed gas line in connection with the PLC controller.
4. An integrated humidification system for dew point adjustment as claimed in claim 1 wherein the wet nitrogen line and the mixed gas line are provided with respective conduit tracing arrangements.
5. An integrated humidification system for adjustment of dew point as claimed in claim 1 wherein check valves are provided at the outlet of the second branch and at the wet nitrogen line respectively.
6. The integrated humidifying system for adjusting the dew point as claimed in claim 1, wherein the top of the humidifying tank is communicated with a water inlet pipe provided with a water replenishing electromagnetic valve, and the bottom of the humidifying tank is communicated with a water drain pipe provided with a water draining electromagnetic valve; the humidifying tank is additionally provided with a heater for heating water and a temperature sensor for detecting the temperature of the water, and the heater, the temperature sensor, the water replenishing electromagnetic valve and the water discharging electromagnetic valve are respectively connected with the PLC.
7. The integrated humidifying system for adjusting the dew point as claimed in claim 1, wherein the humidifying tank is further provided with a pressure sensor for detecting the pressure of nitrogen, and the top of the humidifying tank is provided with a safety relief valve; and the pressure sensor is connected with the PLC.
8. An integrated humidification system for adjustment of dew point as claimed in claim 1 wherein the humidification tank is further provided with a level gauge for sensing the liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021817987.3U CN212515489U (en) | 2020-08-26 | 2020-08-26 | Integrated humidifying system for adjusting dew point |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021817987.3U CN212515489U (en) | 2020-08-26 | 2020-08-26 | Integrated humidifying system for adjusting dew point |
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| CN212515489U true CN212515489U (en) | 2021-02-09 |
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| CN202021817987.3U Active CN212515489U (en) | 2020-08-26 | 2020-08-26 | Integrated humidifying system for adjusting dew point |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063192A (en) * | 2021-04-06 | 2021-07-02 | 首钢京唐钢铁联合有限责任公司 | Humidifying device and humidifying method |
| CN115193277A (en) * | 2022-06-17 | 2022-10-18 | 深圳市德明利光电有限公司 | Gas mixing device for oxidation process and treatment equipment |
| CN115287567A (en) * | 2022-08-04 | 2022-11-04 | 江阴市华达机械科技有限公司 | Stove nose humidification system |
-
2020
- 2020-08-26 CN CN202021817987.3U patent/CN212515489U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063192A (en) * | 2021-04-06 | 2021-07-02 | 首钢京唐钢铁联合有限责任公司 | Humidifying device and humidifying method |
| CN113063192B (en) * | 2021-04-06 | 2022-08-19 | 首钢京唐钢铁联合有限责任公司 | Humidifying device and humidifying method |
| CN115193277A (en) * | 2022-06-17 | 2022-10-18 | 深圳市德明利光电有限公司 | Gas mixing device for oxidation process and treatment equipment |
| CN115287567A (en) * | 2022-08-04 | 2022-11-04 | 江阴市华达机械科技有限公司 | Stove nose humidification system |
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