CN110131701B - Thermal deoxidizing device and method thereof - Google Patents
Thermal deoxidizing device and method thereof Download PDFInfo
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- CN110131701B CN110131701B CN201810129877.9A CN201810129877A CN110131701B CN 110131701 B CN110131701 B CN 110131701B CN 201810129877 A CN201810129877 A CN 201810129877A CN 110131701 B CN110131701 B CN 110131701B
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- water
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- thermal
- deoxygenation
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- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 123
- 239000012530 fluid Substances 0.000 claims abstract description 63
- 239000007921 spray Substances 0.000 claims abstract description 53
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 39
- 239000001301 oxygen Substances 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000000889 atomisation Methods 0.000 claims abstract description 12
- 238000006392 deoxygenation reaction Methods 0.000 claims description 23
- 230000009977 dual effect Effects 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000002000 scavenging effect Effects 0.000 claims description 7
- 230000003635 deoxygenating effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000008236 heating water Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a thermal deoxidizing device and a method thereof, which adopts a double-fluid form, uses water or liquid and uses steam as power to directly atomize. Steam is a heat source at the same time, so that water or liquid can be heated; steam is used as power and a heat source, and is heated simultaneously in the process of atomizing water or liquid, so that the energy-saving and high-efficiency process is realized; a double-fluid spray head is adopted, one end is filled with steam, the other end is filled with water or liquid, a plurality of double-fluid sprays and an oxygen emptying port are arranged in the deoxidizing device, and the spray head sprays water or liquid which is heated by steam atomization; the size of the droplets or droplets of the atomizing effect of the spray head is preferably in the range of 50 to 200 microns. The invention not only uses the pressure of steam as power; meanwhile, the steam is used as a heat source, so that the steam can be effectively mixed and fully exchanges heat; after the small water drops after heat exchange reach the deoxidizing temperature, the dissolved oxygen in the water can be effectively separated out. Meanwhile, vibration caused by directly heating water by steam is avoided, and negative factors affecting the operation of the equipment are formed.
Description
Technical Field
The invention belongs to the field of thermal deoxygenation, and particularly relates to a thermal deoxygenation device and a method thereof, which can be widely used in various occasions for heating liquid by using steam; for example, the heating atomization occasions such as the heating atomization spraying of the tobacco shred essence and the spice of the cigarette in the occasions such as the thermal deoxidation process of the water supply of the boiler.
Background
The traditional thermal deoxygenation of water quality generally adopts the mode of fig. 1, steam is arranged at the lower part of the deoxygenation head, and water is arranged at the upper part of the deoxygenation head; the middle is made of stainless steel anisotropic small pieces; the water drops in a water drop mode through a screening mode and the like, and the steam uniformly goes upwards through a steam distributing disc and the like; in the process, the heterogeneous chips of the steam heating stainless steel are made into a filler, water drops are heated on the filler, so that the water is heated to reach the deoxidizing temperature under the corresponding atmospheric pressure, oxygen contained in the water is separated out, and the air is communicated with an exhaust valve of the deoxidizing head for removal; because of the control hysteresis and the water body heat control, the thermal inertia is large, the control precision is poor, and the steam waste is large; in the later stage, although some patents improve the thermal deoxidizing method, the water distribution plate or the screening of the water is changed into a spray head, so that the particles of the water are smaller, and the heat exchange effect is enhanced; or the steam is heated at the lower end of the water to be deoxygenated, etc., but the problems of poor continuity of working conditions, large vibration of equipment, difficult maintenance, etc. exist; meanwhile, the steam control cannot be quantitative, and the like, so that the steam waste is large.
Disclosure of Invention
The present invention is directed to a thermal deoxygenation device and method thereof, which address one or more of the above problems.
The working principle of the invention is as follows: in the process of atomizing water, the surface area is increased by more than ten thousand times (the atomized water drops, the median is calculated according to 80-100 microns, and the traditional water drops are calculated according to 3 millimeters), and the heat transfer mode is mainly conduction and the surface area is increased, so that the heat exchange is most important for the temperature of the thermal deoxygenation of water; meanwhile, the heat energy of the steam is effectively absorbed, and the loss in the same oxygen discharging process can be avoided.
The dual fluid spray is typically powered by compressed air or the like. Here, the pressure of steam is used as power; meanwhile, the steam is used as a heat source, and can be effectively mixed with the steam to fully exchange heat; after the small water drops after heat exchange reach the deoxidizing temperature, the dissolved oxygen in the water can be effectively separated out. Meanwhile, the related design is avoided, and vibration caused by directly heating water by steam is avoided, so that negative factors affecting the operation of a plurality of devices are formed;
According to the technical scheme, the thermal deoxidization method is provided, a double-fluid spray head is adopted, water or liquid is introduced into a first input end of the double-fluid spray head, steam is introduced into a second input end of the double-fluid spray head, the pressure of the steam is used as the power of the double-fluid spray head, and the steam is used as a heat source; the double-fluid spray head is arranged in the deoxidizing device, the spray head sprays water or liquid into the deoxidizing device by utilizing steam atomization, and oxygen is separated out and discharged through the emptying port.
Further, the liquid drops sprayed by the double-fluid spray head are condensed to the deoxidization control temperature and then fall into the deoxidization device after condensation.
Further, the air pressure in the deoxidizing device is set below 0.025MPa gauge pressure.
Further, the size of the atomized droplets of the dual fluid spray head is set to have a median diameter of between 50 and 200 microns.
Another aspect of the technical scheme of the invention provides a thermal deoxidizing device, which comprises a dual-fluid spray head, a deoxidizing device, a waterway, a steam pipeline and an oxygen emptying port;
-said dual fluid nozzle has a first input communicating with the waterway and a second input communicating with the steam line;
-arranging a plurality of dual fluid sprayers within the oxygen scavenging device, the oxygen scavenging device being provided with an evacuation port for oxygen.
Further, the dual fluid spray head selects an outlet orifice of atomized liquid drops with a median diameter of 50-200 microns.
Further, the evacuation port is provided with an evacuation valve through which oxygen is discharged.
Further, the deoxidizing device is a deoxidizing water tank or a deoxidizing tank.
Further, the device also comprises a controller, a water temperature sensor, a water pressure sensor, a vapor pressure sensor, an electromagnetic valve, an electric regulating valve and a water level differential pressure sensor;
The controller is connected with a water temperature sensor, a water pressure sensor, a vapor pressure sensor, an electromagnetic valve, an electric regulating valve and a water level differential pressure sensor;
the waterway is connected with a water pressure sensor, and the steam pipeline is connected with a steam pressure sensor and an electric regulating valve;
-electromagnetic valves are respectively arranged between the double-fluid spray head and the waterway and steam pipeline;
-a differential water level sensor is provided in the deoxygenating means.
Further, the controller includes a deoxygenator level control module configured to: when the water level is lower than the set water level value, a group of double-fluid spray heads are added at regular time; and after the water level exceeds the set water level value, reducing a group of double-fluid spray heads at fixed time.
Further, the controller includes an oxygen removal device temperature control module configured to employ PID control and to be controlled by flow characteristics of the dual fluid showerhead, the flow characteristics related parameters including: fluid pressure, median of size atomization of water droplets, flow value of the dual fluid spray.
After the water droplets are condensed to the deoxidization control temperature relative to the steam temperature, the water droplets are condensed and fall into a deoxidization water storage tank body, oxygen is separated out, and the separation of oxygen and the water temperature are related to the pressure of the surface of the water body; in general, water at 100 ℃ can be separated out from oxygen under the pressure of 0.025MPa, and the lower the pressure is, the better the separation is, the cleaner the oxygen is removed, and the oxygen is removed along with water vapor in the space of the oxygen removal tank through an exhaust valve; thereby completing the process of deoxidizing the soft water; according to the thermal deoxidization method, through a proper emptying port or an emptying caliber pipeline, the thermal deoxidization method is directly communicated with the atmosphere, has small air resistance and is clean in deoxidization.
Drawings
FIG. 1 is a schematic diagram of a prior art thermal deoxygenator for water quality;
wherein: 101-a water inlet pipe; 102, a steam inlet pipe; 103-a water distribution plate; 104-metal filler; 105-a steam-distributing disc; 107-a safety valve; 108-an evacuation valve; 109—a temperature sensor; 10a water level sensor; 11-deoxidized water outlet;
FIG. 2 is a schematic diagram of the thermal deoxygenating device of one embodiment of the present invention;
wherein: 1-a water pump; 2-a water pressure sensor; 3-a frequency converter; 4-a motor; 5-a steam pressure reducing valve; 6-an electric regulating valve; 7-a vapor pressure sensor; 8-an electromagnetic valve; 9-evacuation port (oxygen overflow port); 10- (2)
An oxygen scavenging safety valve; 11-a water temperature sensor; 12-a water level differential pressure sensor; 13-dual fluid spray;
FIG. 3 is a schematic diagram of the belt controller of one embodiment of the thermal deoxygenator device of the present invention;
FIG. 4 is a control schematic of one embodiment of the tank water temperature control of the present invention;
FIG. 5 is a schematic control diagram of one embodiment of the feedwater pressure control of the present invention;
FIG. 6 is a schematic control diagram of an embodiment of the present invention with a controlled feedwater pressure;
FIG. 7 is a flow chart of a dual fluid ejection head used to implement control in accordance with one embodiment of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and specific examples.
Example 1
As shown in fig. 2, the steam pipeline and the water pipeline are directly introduced into the double-fluid nozzle; the double-fluid spray head is connected to the deoxidizing water tank, and the spray head sprays water into the water tank by utilizing steam atomization.
Example 2:
as shown in fig. 3, the water level of the water tank is controlled, and the control principle is as shown in fig. 3; the flow characteristic diagram of the dual-fluid spray head is shown in fig. 7, and the characteristics are realized by a related PLC or an instrument, so that the required deoxidizing effect can be obtained.
The control of the deaeration tank water level is shown in fig. 2: when the water level is low, a group of water and steam electromagnetic valves under the control of a PLC or an instrument are added at regular time (such as every 3 s) for each control period; after exceeding the water level, the timing is reduced by one group for each control period (for example, every 3 s); PID control or multi-water (double-water) level control is adopted. The device is well made, and a queue algorithm, namely 'first-in first-out', can be used for circularly using the spray head, and is beneficial to periodic inspection, maintenance and replacement of equipment.
The control of the oxygen removal temperature is controlled by the relevant flow characteristics of the dual fluid showerhead. As shown in figure seven; the left end of the coordinates is fluid pressure, the right end is the median of the size atomization of the water droplets, and the lower part is the flow value of the spray head. It can be seen that the smaller the size after atomization, the lower the water flow rate of the spray head and the higher the temperature; when we use steam as the power and heat source, how much kg of water at a certain temperature is heated to a desired temperature by the heat energy contained in each kg of steam is fixed and linear. The water temperature can be adjusted by increasing (decreasing) one of the steam (or water) pressure and the water temperature; the characteristic curve values of the double-fluid spray head can also be used for reducing the pressure of the two spray heads, reducing atomized particles and flow and increasing water temperature; a block diagram of the adjustment is shown in fig. 4.
Example 3:
the thermal deoxidization method adopts a double-fluid spray head, wherein water or liquid is introduced into a first input end of the double-fluid spray head, steam is introduced into a second input end of the double-fluid spray head, the pressure of the steam is used as the power of the double-fluid spray head, and the steam is used as a heat source; the double-fluid spray head is arranged in the deoxidizing device, the spray head sprays water or liquid into the deoxidizing device by utilizing steam atomization, and oxygen is separated out and discharged through the emptying port.
Example 4:
Unlike example 3, the droplets ejected from the two-fluid nozzle condensed to the oxygen removal control temperature, and then the condensed droplets were dropped into the oxygen removal device.
Example 4:
Unlike example 3, the air pressure in the deaerator was controlled to be 0.025MPa gauge or less, and the temperature was preferably controlled to be 100℃or more. Or other PID control values.
Example 5:
unlike example 3, the size of the atomized droplets of the dual fluid spray head was set to have a median diameter of between 50 and 200 microns.
Example 6:
The thermal deoxidizing device comprises a double-fluid spray head, a deoxidizing device, a waterway, a steam pipeline and an oxygen emptying port;
-said dual fluid nozzle has a first input communicating with the waterway and a second input communicating with the steam line;
-arranging a plurality of dual fluid sprayers within the oxygen scavenging device, the oxygen scavenging device being provided with an evacuation port for oxygen.
Example 7:
Unlike example 6, the dual fluid spray head selected the outlet orifice of the atomized droplets having a median diameter between 50 and 200 microns.
Example 7:
Unlike example 6, the evacuation port was provided with an evacuation valve through which oxygen was discharged. The deoxidizing device is a deoxidizing water tank or deoxidizing tank.
Example 7:
Unlike example 6, the device further comprises a controller, a water temperature sensor, a water pressure sensor, a vapor pressure sensor, a solenoid valve, an electric control valve, and a water level differential pressure sensor;
The controller is connected with a water temperature sensor, a water pressure sensor, a vapor pressure sensor, an electromagnetic valve, an electric regulating valve and a water level differential pressure sensor;
the waterway is connected with a water pressure sensor, and the steam pipeline is connected with a steam pressure sensor and an electric regulating valve;
-electromagnetic valves are respectively arranged between the double-fluid spray head and the waterway and steam pipeline;
-a differential water level sensor is provided in the deoxygenating means.
Example 8:
unlike embodiment 7, the controller includes a deaerator water level control module configured to: when the water level is lower than the set water level value, a group of double-fluid spray heads are added at regular time; and after the water level exceeds the set water level value, reducing a group of double-fluid spray heads at fixed time.
Example 9:
Unlike example 7, the controller includes an oxygen removal device temperature control module configured to employ PID control and to be controlled by the flow characteristics of the dual fluid showerhead, the flow characteristics related parameters including: fluid pressure, median of size atomization of water droplets, flow value of the dual fluid spray.
Example 9:
Unlike embodiment 7, the oxygen removal temperature control module includes: the total deoxidization temperature setting module is connected with the total PID control module and is connected in parallel in two ways, the first way is connected with the steam supply pressure setting module and is connected with the steam supply PID control module, the regulating valve is connected with the steam supply pressure detection module, the pressure of the steam supply pipeline is fed back to the steam supply PID control module, and the steam supply pressure detection module is connected with the deoxidization water temperature module.
The second path is connected with a water supply pressure setting module, a water supply PID control module, a frequency converter, a motor, a pump and a water supply pressure detection module, the pressure of a water supply pipeline is fed back to the water supply PID control module, and the water supply pressure detection module is connected with a deaerated water temperature module; the deoxygenated water temperature module feeds back the pressure of deoxygenated water to the total deoxygenated temperature setting module, and the deoxygenated water temperature module outputs deoxygenated water data.
In the several embodiments provided in the present application, it should be understood that the disclosed modules, systems may be implemented in other manners. For example, the modules, system embodiments described above are merely illustrative, e.g., the division of the modules is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another device, or some features may be omitted, or not performed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical scheme of the present invention and are not limited thereto; although the present application has been described in detail with reference to preferred embodiments, it should be understood by those of ordinary skill in the art that: the specific embodiments of the present disclosure may be modified or some technical features may be replaced equivalently; without departing from the spirit of the present technical solution, it should be covered in the scope of the technical solution claimed in the present application.
Claims (12)
1. A thermal deoxidization method is characterized in that a double-fluid nozzle is adopted, a first input end of the double-fluid nozzle is communicated with liquid, a second input end of the double-fluid nozzle is communicated with steam, the pressure of the steam is used as the power of the double-fluid nozzle, and the steam is used as a heat source; arranging a double-fluid spray head in the deoxidizing device, spraying liquid into the deoxidizing device by utilizing steam atomization, separating out oxygen and discharging the oxygen through an emptying port; and after the liquid drops sprayed by the double-fluid spray head are condensed to the deoxidization control temperature, the condensed liquid drops fall into the deoxidization device.
2. The method of claim 1, wherein the liquid is water.
3. The thermal deoxygenation method of claim 1 wherein the pressure of air in the deoxygenation device is set below 0.025MPa gauge pressure.
4. The thermal deoxygenation method of claim 2 wherein the pressure of air in the deoxygenation device is set below 0.025MPa gauge pressure.
5. The method of thermal deoxygenation of any one of claims 1-4, wherein the size of atomized droplets of the dual fluid nozzle is set to a median diameter of between 50-200 microns.
6. A thermal deoxidizing device is characterized in that,
Comprises a double-fluid spray head, an oxygen removing device, a waterway, a steam pipeline and an oxygen evacuating port;
-said dual fluid nozzle has a first input communicating with the waterway and a second input communicating with the steam line;
-arranging a plurality of dual fluid sprayers within the oxygen scavenging device, the oxygen scavenging device being provided with an evacuation port for oxygen.
7. The thermal deoxygenation device of claim 6 wherein said dual fluid nozzle selects an outlet orifice of atomized droplets having a median diameter of between 50 and 200 microns.
8. The thermal deoxygenation device of claim 6 wherein the evacuation port is provided with an evacuation valve through which oxygen is evacuated.
9. The thermal deoxygenation device of claim 6 wherein said deoxygenation device is a deoxygenation water tank or deoxygenation tank.
10. The thermal deoxygenation device of any one of claims 6-9, further comprising a controller, a water temperature sensor, a water pressure sensor, a vapor pressure sensor, a solenoid valve, an electrically operated control valve, a water level differential pressure sensor;
The controller is connected with a water temperature sensor, a water pressure sensor, a vapor pressure sensor, an electromagnetic valve, an electric regulating valve and a water level differential pressure sensor;
the waterway is connected with a water pressure sensor, and the steam pipeline is connected with a steam pressure sensor and an electric regulating valve;
-electromagnetic valves are respectively arranged between the double-fluid spray head and the waterway and steam pipeline;
-a differential water level sensor is provided in the deoxygenating means.
11. The thermal deoxygenation device of claim 10 wherein the controller comprises a deoxygenation device water level control module configured to: when the water level is lower than the set water level value, a group of double-fluid spray heads are added at regular time; and after the water level exceeds the set water level value, reducing a group of double-fluid spray heads at fixed time.
12. The thermal deoxygenation device of claim 10 wherein the controller comprises a deoxygenation device temperature control module configured to employ PID control and to be controlled by flow characteristics of the dual fluid showerhead, flow characteristics related parameters comprising: fluid pressure, median of size atomization of water droplets, flow value of the dual fluid spray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129877.9A CN110131701B (en) | 2018-02-08 | 2018-02-08 | Thermal deoxidizing device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129877.9A CN110131701B (en) | 2018-02-08 | 2018-02-08 | Thermal deoxidizing device and method thereof |
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| Publication Number | Publication Date |
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| CN110131701A CN110131701A (en) | 2019-08-16 |
| CN110131701B true CN110131701B (en) | 2024-05-28 |
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| CN201810129877.9A Active CN110131701B (en) | 2018-02-08 | 2018-02-08 | Thermal deoxidizing device and method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2242672C1 (en) * | 2003-04-01 | 2004-12-20 | Зимин Борис Алексеевич | Deaeration unit |
| CN201954513U (en) * | 2011-03-09 | 2011-08-31 | 南京华电节能环保设备有限公司 | Heat transfer oil steam generator |
| CN103292311A (en) * | 2013-05-31 | 2013-09-11 | 际华三五三九制鞋有限公司 | Heat filler type deaerator with stable deaerating function and atomizing function |
| CN208025494U (en) * | 2018-02-08 | 2018-10-30 | 红塔烟草(集团)有限责任公司 | Thermal deoxygenizing apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2565650C1 (en) * | 2014-07-24 | 2015-10-20 | Акционерное общество "Научно-исследовательский и проектно-конструкторский институт энергетических технологий "АТОМПРОЕКТ" (АО "АТОМПРОЕКТ") | Deaerator (versions) |
-
2018
- 2018-02-08 CN CN201810129877.9A patent/CN110131701B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2242672C1 (en) * | 2003-04-01 | 2004-12-20 | Зимин Борис Алексеевич | Deaeration unit |
| CN201954513U (en) * | 2011-03-09 | 2011-08-31 | 南京华电节能环保设备有限公司 | Heat transfer oil steam generator |
| CN103292311A (en) * | 2013-05-31 | 2013-09-11 | 际华三五三九制鞋有限公司 | Heat filler type deaerator with stable deaerating function and atomizing function |
| CN208025494U (en) * | 2018-02-08 | 2018-10-30 | 红塔烟草(集团)有限责任公司 | Thermal deoxygenizing apparatus |
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| CN110131701A (en) | 2019-08-16 |
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