CN214745676U - Water supply and oxygen adding device for power plant boiler - Google Patents
Water supply and oxygen adding device for power plant boiler Download PDFInfo
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- CN214745676U CN214745676U CN202120425275.5U CN202120425275U CN214745676U CN 214745676 U CN214745676 U CN 214745676U CN 202120425275 U CN202120425275 U CN 202120425275U CN 214745676 U CN214745676 U CN 214745676U
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- oxygenation
- oxygen
- flow
- valve
- pressure reducing
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- 239000001301 oxygen Substances 0.000 title claims abstract description 112
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 112
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000006213 oxygenation reaction Methods 0.000 claims abstract description 82
- 230000001105 regulatory effect Effects 0.000 claims abstract description 52
- 238000012806 monitoring device Methods 0.000 claims abstract description 31
- 238000011282 treatment Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- IGHXQFUXKMLEAW-UHFFFAOYSA-N iron(2+) oxygen(2-) Chemical compound [O-2].[Fe+2].[Fe+2].[O-2] IGHXQFUXKMLEAW-UHFFFAOYSA-N 0.000 abstract 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 9
- 239000010962 carbon steel Substances 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 7
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000011276 addition treatment Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000012492 regenerant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a power boiler feedwater oxygenation device has solved the economizer of the feed pipe among the power boiler feedwater oxygenation system that exists among the prior art and has taken place to flow and corrode with higher speed and make the higher technical problem of iron content in the feedwater. The device is a power plant boiler feed water oxygenation device, and is characterized by comprising a fine treatment oxygenation channel and a PLC oxygenation control cabinet; the oxygenation channel comprises a plurality of oxygen bottles (1), a pressure reducing device (51), a flow regulating device (52) and a flow monitoring device (53), the output of the oxygen bottles (1) is sequentially connected with the pressure reducing device (51), the flow regulating device (52) and the flow monitoring device (53) through the oxygenation channel, and the pressure reducing device (51), the flow regulating device (52) and the flow monitoring device (53) are further respectively electrically connected with the PLC oxygenation control cabinet. The utility model discloses an oxygenation device can form the di-iron oxide film, has avoided the accelerated corrosion in the stokehold system to the iron content in the feedwater has been reduced.
Description
Technical Field
The utility model relates to an electric power and power engineering technical field specifically are related to a power plant's boiler feedwater oxygenation device.
Background
The traditional water supply AVT treatment is to reduce the oxygen content of water supply as much as possible, and during the water supply AVT treatment, the surface of carbon steel is provided with a magnetic ferroferric oxide protective film, the magnetic ferroferric oxide has higher dissolved oxygen in high-temperature pure water, and the magnetic ferroferric oxide is easy to dissolve particularly in high-speed flowing pure water, so that a high-pressure heater made of carbon steel and an economizer of a water supply pipe generate a flow accelerated corrosion phenomenon, and the iron content of water supply is high.
The PH of the water vapor system is increased by adding ammonia, and hydrazine is added to remove residual oxygen from the feedwater and to place the water vapor system under reducing conditions. For example, publication No. CN102070254A discloses an intrinsically safe boiler feed water oxygenation treatment method, which comprises 1) the treatment mode of feed water before oxygenation of a copper-free system of a thermal power unit is only ammonia addition treatment; 2) closing an exhaust valve of the deaerator after a certain condition is met; 3) adding oxygen at an oxygen adding point at a condensate fine treatment outlet of the unit; 4) controlling the dissolved oxygen content of the feed water at the inlet of the economizer to be within the range of 5-50 mug/kg, and not obviously increasing the chromate content of the main steam compared with that before adding oxygen; 5) controlling the cationic conductivity of the boiler water of the lower header of a drum boiler<1.5 μ S/cm and [ Cl ]-]<125 mug/kg; 6) when the feed water CC in front of the furnace is reduced to below 0.15 muS/cm, the control range of the feed water pH25 ℃ in front of the furnace is reduced to 8.8-9.3; 7) before the unit stops running, the pH value of the feed water in front of the furnace is increased to 9.3-9.6 at 25 ℃; 8) and (5) stopping the furnace for maintenance.
Although the method for adding oxygen to the water supply increases the pH value of a water vapor system to be more than 9.5, the accidents caused by the peeling of the oxide skin of the steam through-flow system after the water supply is added with oxygen can be effectively prevented, the corrosion of carbon steel and the iron content of the water supply can be reduced to a certain extent, but the operation period of the condensate polishing can be shortened, so that the period of the chemical cleaning of the boiler is shortened, and the regeneration times, the consumption of the regenerant and the wastewater amount are increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power boiler feedwater oxygenation device to solve the economizer of the feed pipe that exists among the prior art and take place to flow and corrode with higher speed and make the higher technical problem of iron content in the feedwater.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a power plant boiler feed water oxygenation device comprises a fine treatment oxygenation channel and a PLC oxygenation control cabinet; the output that adds the oxygen passageway includes a plurality of oxygen cylinders, pressure relief device, flow regulation device and flow monitoring device oxygen cylinder is connected with pressure relief device, flow regulation device and flow monitoring device in proper order through adding the oxygen passageway, and pressure relief device, flow regulation device and flow monitoring device still are connected with PLC adds the oxygen switch board electricity respectively.
Optionally or preferably, the oxygen adding device further comprises an oxygen adding channel for an outlet sewer pipe of the oxygen remover, the oxygen adding channel for the outlet sewer pipe of the oxygen remover comprises a plurality of oxygen bottles, a pressure reducing device, a flow regulating device and a flow monitoring device, the output of each oxygen bottle is sequentially connected with the pressure reducing device, the flow regulating device and the flow monitoring device through the oxygen adding channel, and the pressure reducing device, the flow regulating device and the flow monitoring device are further respectively and electrically connected with the PLC oxygen adding control cabinet.
Optionally or preferably, the system further comprises a bus bar frame, and the fine processing oxygenation channel and the deaerator outlet sewer pipe oxygenation channel are connected through the bus bar frame.
Optionally or preferably, the pressure reducing device comprises a first stop valve, a first electric contact pressure gauge, a pressure reducing valve, a second electric contact pressure gauge, an electric regulating valve and a buffer pressure container which are arranged along the oxygen inlet direction; the electric contact pressure gauge I, the pressure reducing valve, the electric contact pressure gauge II and the electric regulating valve are respectively and electrically connected with the PLC oxygenation control cabinet.
Optionally or preferably, a safety valve is further connected to the oxygenation channel, the safety valve is located between the pressure reduction device and the flow regulating device, and the safety valve is electrically connected with the PLC oxygenation control cabinet.
Optionally or preferably, the flow regulating device comprises a manual regulating valve and an electromagnetic regulating valve which are arranged in parallel through a pipeline, and two sides of the electromagnetic regulating valve are respectively provided with a second stop valve and a third stop valve; and the second stop valve and the third stop valve are respectively electrically connected with the PLC oxygenation control cabinet.
Alternatively or preferably, the flow regulating means comprises a manual regulating valve.
Optionally or preferably, the flow monitoring device comprises a flow monitor and a stop valve six which are arranged in parallel through a pipeline, and two sides of the flow monitor are respectively provided with a stop valve four and a stop valve five; and the flow monitor, the stop valve IV and the stop valve V are respectively and electrically connected with the PLC oxygenation control cabinet.
Optionally or preferably, the system further comprises a hydrogen conductivity detection device and a dissolved oxygen detection device, wherein the hydrogen conductivity detection device and the dissolved oxygen detection device are respectively electrically connected with the PLC oxygenation control cabinet.
Optionally or preferably, the flow monitor is a gas rotameter.
Based on the above technical solution, the present embodiment can at least produce the following technical effects:
the utility model discloses a power plant's boiler feedwater oxygenation device connects oxygen cylinder, pressure relief device, flow regulation device and flow monitoring device in order through the passageway that adds oxygen, is connected pressure relief device, flow regulation device and flow monitoring device respectively with PLC oxygenation switch board electricity. When the device is used, oxygen is enabled to pass through the oxygenation channel under the accurate control of the oxygenation control cabinet to finish the boiler water supply oxygenation process, when the purity of water reaches a certain requirement (generally, the hydrogen conductivity is less than 0.2 mu S/cm), the dissolved oxygen concentration is controlled to be 30 mu g/L-300 mu g/L, not only the corrosion of carbon steel can not be caused, but also a layer of ferric oxide protective film which is more uniform and compact than the magnetic ferroferric oxide protective film can be formed on the surface of the carbon steel, and the ferric oxide protective film can not be easily dissolved even in high-speed flowing pure water with higher dissolved oxygen, so that a high-pressure heater made of carbon steel is prevented, a water supply pipe and an economizer are prevented from flowing and accelerated corrosion, and the iron content in the water is reduced; and the chemical cleaning period of the boiler and the operation period of condensate fine treatment are prolonged, the regeneration times, the consumption of regenerants and the amount of waste water are reduced, the service life of equipment is prolonged, and the safe operation of the boiler is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the boiler feedwater oxygenation device of the present invention.
In the figure: 1-an oxygen cylinder; 2-oxygen cylinder valve; 3-angle valve; 4-a busbar frame; 5-a pressure reducing valve; 6-electric regulating valve; 7-a buffer pressure vessel; 8-safety valve; 9-electromagnetic regulating valve; 10-a flow monitor; 11-a first stop valve; 12-a second stop valve; 13-stop valve III; 14-stop valve four; 15-stop valve five; 16-stop valve six; 17-stop valve seven; 18-stop valve eight; 19-manual regulating valve; 20-a check valve; 21-back pressure valve; 22-a buffer tank; 23-electric contact pressure gauge I; 24-electric contact pressure gauge two; 25-electric contact pressure gauge III; 26-four electric contact pressure gauge; 27-mechanical pressure gauge; 51-a pressure reduction device; 52-a flow regulating device; 53-flow monitoring device.
Detailed Description
As shown in fig. 1:
the utility model relates to a water supply and oxygen adding device for a power plant boiler, which is characterized by comprising a fine treatment oxygen adding channel and a PLC oxygen adding control cabinet; the oxygenation channel comprises a plurality of oxygen bottles 1, a pressure reducing device 51, a flow regulating device 52 and a flow monitoring device 53, the output of the oxygen bottles 1 is sequentially connected with the pressure reducing device 51, the flow regulating device 52 and the flow monitoring device 53 through the oxygenation channel, and the pressure reducing device 51, the flow regulating device 52 and the flow monitoring device 53 are further respectively and electrically connected with the PLC oxygenation control cabinet.
The utility model discloses a power boiler feedwater oxygenation device connects oxygen cylinder 1, pressure relief device 51, flow regulation device 52 and flow monitoring device 53 in order through the passageway that adds oxygen, is connected pressure relief device 51, flow regulation device 52 and flow monitoring device 53 respectively with PLC oxygenation switch board electricity. When the device is used, oxygen is enabled to pass through the oxygenation channel under the accurate control of the oxygenation control cabinet to finish the boiler water supply oxygenation process, when the purity of water reaches a certain requirement (generally, the hydrogen conductivity is less than 0.2 mu S/cm), the dissolved oxygen concentration is controlled to be 30 mu g/L-300 mu g/L, not only the corrosion of carbon steel can not be caused, but also a layer of ferric oxide protective film which is more uniform and compact than the magnetic ferroferric oxide protective film can be formed on the surface of the carbon steel, and the ferric oxide protective film can not be easily dissolved even in high-speed flowing pure water with higher dissolved oxygen, so that a high-pressure heater made of carbon steel is prevented, a water supply pipe and an economizer are prevented from flowing and accelerated corrosion, and the iron content in the water is reduced; and the chemical cleaning period of the boiler and the operation period of condensate fine treatment are prolonged, the regeneration times, the consumption of regenerants and the amount of waste water are reduced, the service life of equipment is prolonged, and the safe operation of the boiler is ensured.
As an optional implementation mode, the oxygen adding device further comprises an oxygen adding channel of an outlet sewer pipe of the oxygen remover, the oxygen adding channel of the outlet sewer pipe of the oxygen remover comprises a plurality of oxygen bottles 1, a pressure reducing device 51, a flow regulating device 52 and a flow monitoring device 53, the output of the oxygen bottles 1 is sequentially connected with the pressure reducing device 51, the flow regulating device 52 and the flow monitoring device 53 through the oxygen adding channel, and the pressure reducing device 51, the flow regulating device 52 and the flow monitoring device 53 are further respectively and electrically connected with the PLC oxygen adding control cabinet.
As an alternative embodiment, the fine treatment oxygenation channel and the deaerator outlet downcomer oxygenation channel are connected by a busbar frame 4. When the oxygen cylinder oxygen adding device is in actual use, the oxygen cylinders 1 are divided into two groups and connected in the bus frame 4, one group of oxygen cylinders 1 are used for adding oxygen to the outlet of the fine processing device, the other group of oxygen cylinders 1 are used for adding oxygen to the sewer pipe at the outlet of the deaerator, only one oxygen cylinder is opened for each group of oxygen cylinders 1 during operation, and when the oxygen cylinders 1 need to be replaced, the new oxygen cylinders 1 are replaced for adding oxygen. Certainly, under the condition of only being used for the oxygen adding of the fine processing outlet, the oxygen bottle 1 for the oxygen adding of the outlet downcomer of the deaerator can be used for the oxygen adding of the fine processing outlet under the conditions that the first stop valve 11 on the oxygen adding channel of the outlet downcomer of the deaerator is closed and the eighth stop valve 18 is opened; under the condition of only being used for oxygen adding at the oxygen remover outlet, the oxygen bottle 1 for oxygen adding at the refined treatment outlet can be used for oxygen adding at the oxygen remover outlet under the condition of closing the first stop valve 11 on the oxygen adding channel corresponding to the refined treatment outlet and opening the eighth stop valve 18.
As an alternative embodiment, the pressure reducing device 51 comprises a first stop valve 11, a first electric contact pressure gauge 23, a pressure reducing valve 5, a second electric contact pressure gauge 24, an electric regulating valve 6 and a buffer pressure container 7 which are arranged along the oxygen inlet direction; and the electric contact pressure gauge I23, the pressure reducing valve 5, the electric contact pressure gauge II 24 and the electric regulating valve 6 are respectively and electrically connected with the PLC oxygenation control cabinet. Because the pressure coming out of the oxygen cylinder 1 is about 15MPa, the pressure of the oxygen is reduced through the pressure reducing valve 5, so that the pressure of the oxygen can be in a stable state, and then the uniformity of oxygen addition is ensured by utilizing the buffer pressure container 7.
The first electric contact pressure gauge 23 measures the pressure before the pressure reducing valve 5, and the second electric contact pressure gauge 24 measures the pressure after the pressure reducing valve 5; in the using process, after a pressure alarm point is set in the PLC oxygenation control cabinet, the first electric contact pressure gauge 23 and the second electric contact pressure gauge 24 transmit pressure signals to the PLC oxygenation control cabinet, and when the pressure is higher than a set value or lower than the set value, an alarm is displayed on the PLC oxygenation control cabinet to remind a worker to replace the oxygen cylinder 1 or check a pipeline system. For the corresponding oxygenation channel at the outlet of the fine treatment: the pressure behind the pressure reducing valve 5 needs to be controlled to be 3.8MPa, and when the pressure in front of the pressure reducing valve 5 is less than 4.0MPa, the other bottle of oxygen is opened and the bottle is closed; for the corresponding oxygenation channel of the outlet downcomer of the deaerator: the pressure behind the pressure reducing valve 5 is controlled to be 1.5MPa, when the pressure in front of the pressure reducing valve 5 is less than 2.0MPa, another bottle of oxygen is opened again, and the bottle opened before is closed. When the pressure-reducing valve is used, the outlet pressure of the pressure-reducing valve 5 is checked every two hours, and the oxygen adding side pressure of the deaerator is ensured to be 1.35MPa and absolutely not to exceed 1.4 MPa.
The electric control valve 6 is controlled by an instruction of the PLC oxygenation control cabinet, and is opened or closed according to the numerical value of the hydrogen conductivity monitored by the hydrogen conductivity detection device, the oxygenation is stopped when the water and hydrogen conductivity is higher than 25 ℃ and higher than 0.15 mu S/cm, and the oxygenation is automatically started when the water and hydrogen conductivity is lower than 25 ℃ and lower than 0.15 mu S/cm.
As an optional embodiment, a safety valve 8 is further connected to the oxygenation passage, the safety valve 8 is located between the pressure reducing device 51 and the flow regulating device 52, and the safety valve 8 is electrically connected to the PLC oxygenation control cabinet. And when the electric contact pressure gauge IV 26 detects that the system pressure is more than 3.0Mpa, the safety valve 8 is automatically opened through a PLC oxygenation control cabinet, so that the safety of the system is ensured.
As an alternative embodiment, the flow regulating device 52 comprises a manual regulating valve 19 and an electromagnetic regulating valve 9 which are arranged in parallel through a pipeline, and two sides of the electromagnetic regulating valve 9 are respectively provided with a second stop valve 12 and a third stop valve 13; and the second stop valve 12 and the third stop valve 13 are respectively electrically connected with the PLC oxygenation control cabinet. The electromagnetic regulating valve 9 can be used for regulating the flow by processing through a valve internal module according to the pressure difference between an inlet and an outlet, does not need an additional flow computer, and is high in precision and high in response speed.
As an alternative embodiment, said flow regulation means 52 comprise a manual regulation valve 19.
As an optional embodiment, the flow monitoring device 53 includes a flow monitor 10 and a stop valve six 16 arranged in parallel through a pipeline, and two sides of the flow monitor 10 are respectively provided with a stop valve four 14 and a stop valve five 15; and the flow monitor 10, the stop valve IV 14 and the stop valve V15 are respectively electrically connected with the PLC oxygenation control cabinet.
When the unit is just put into an oxygenation system for preliminary adjustment for the oxygenation of a fine treatment outlet, closing the second stop valve 12, the third stop valve 13, the fourth stop valve 14 and the fifth stop valve 15, opening the sixth stop valve 16 and closing the 18 by the PLC oxygenation control cabinet; the manual adjustment valve 19 is manually opened, and the opening degrees of the first stop valve 11, the seventh stop valve 17, the check valve 20, and the back pressure valve 21 are adjusted by controlling the flow rate of oxygen. After the preliminary adjustment is completed and the system operation conditions are met, the manual regulating valve 19 and the stop valve six 16 are closed, the second stop valve 12 and the third stop valve 13 in the flow regulating device 52, the fourth stop valve 14 and the fifth stop valve 15 in the flow monitoring device 53 are opened, pure oxygen is decompressed through the decompression device 51 and then passes through the electromagnetic regulating valve 9 and the flow monitor 10, and the PLC oxygenation control cabinet is used for carrying out automatic control and fine processing outlet oxygenation.
When the oxygen adding device is used for adding oxygen to the outlet of the oxygen remover, the PLC oxygen adding control cabinet is used for closing the fourth stop valve 14 and the fifth stop valve 15, opening the sixth stop valve 16 and closing the 18; the manual adjustment valve 19 is manually opened, and the opening degrees of the first shutoff valve 11, the check valve 20, and the back pressure valve 21 are adjusted by controlling the flow rate of oxygen. After the preliminary adjustment is completed and the system operation condition is met, closing the stop valve six 16, opening the stop valve four 14 and the stop valve five 15 in the flow monitoring device 53, reducing the pressure of pure oxygen through the pressure reducing device 51, passing through the manual regulating valve 19 and the flow monitor 10, and utilizing the PLC oxygenation control cabinet to automatically control the oxygen adding at the outlet of the deaerator.
As an optional implementation mode, the system further comprises a hydrogen conductivity detection device and a dissolved oxygen detection device, wherein the hydrogen conductivity detection device and the dissolved oxygen detection device are respectively and electrically connected with the PLC oxygenation control cabinet.
In an alternative embodiment, the flow monitor 10 is a gas rotameter, although other types of gas flowmeters, such as vortex shedding meters, orifice plate flowmeters, etc., may be used.
As an optional implementation, further comprising: a check valve 20 and a back pressure valve 21, the check valve 20 and the back pressure valve 21 being installed at the end of the oxygenation passage, the check valve 20 for preventing gas from flowing back, and the back pressure valve 21 for finely adjusting the pressure.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model relates to a water supply and oxygen adding device for a power plant boiler, which is characterized by comprising a fine treatment oxygen adding channel and a PLC oxygen adding control cabinet; the oxygenation channel comprises a plurality of oxygen bottles (1), a pressure reducing device (51), a flow regulating device (52) and a flow monitoring device (53), the output of the oxygen bottles (1) is sequentially connected with the pressure reducing device (51), the flow regulating device (52) and the flow monitoring device (53) through the oxygenation channel, and the pressure reducing device (51), the flow regulating device (52) and the flow monitoring device (53) are further respectively electrically connected with the PLC oxygenation control cabinet.
2. The power plant boiler feed water oxygenation device according to claim 1, characterized by further comprising a deaerator outlet downcomer oxygenation channel, wherein the deaerator outlet downcomer oxygenation channel comprises a plurality of oxygen cylinders (1), a pressure reducing device (51), a flow regulating device (52) and a flow monitoring device (53), an output of the oxygen cylinders (1) is sequentially connected with the pressure reducing device (51), the flow regulating device (52) and the flow monitoring device (53) through the oxygenation channel, and the pressure reducing device (51), the flow regulating device (52) and the flow monitoring device (53) are further electrically connected with the PLC oxygenation control cabinet respectively.
3. The feed water and oxygen adding device of the power plant boiler as claimed in claim 1 or 2, characterized by further comprising a bus frame (4), wherein the fine treatment oxygen adding channel and the oxygen adding channel of the deaerator outlet downcomer are connected through the bus frame (4).
4. The feed water and oxygen adding device of the power plant boiler as claimed in claim 1 or 2, characterized in that the pressure reducing device (51) comprises a first stop valve (11), a first electric contact pressure gauge (23), a pressure reducing valve (5), a second electric contact pressure gauge (24), an electric regulating valve (6) and a buffer pressure container (7) which are arranged along the oxygen inlet direction; and the electric contact pressure gauge I (23), the pressure reducing valve (5), the electric contact pressure gauge II (24) and the electric regulating valve (6) are respectively and electrically connected with the PLC oxygenation control cabinet.
5. The feed water oxygenation device of the power plant boiler as claimed in claim 1 or 2, characterized in that a safety valve (8) is connected to the oxygenation channel, the safety valve (8) is located between the pressure reducing device (51) and the flow regulating device (52), and the safety valve (8) is electrically connected with a PLC oxygenation control cabinet.
6. A power plant boiler feed water oxygenation device according to claim 1, characterized in that the flow regulating device (52) comprises a manual regulating valve (19) and an electromagnetic regulating valve (9) which are arranged in parallel through a pipeline, and a second stop valve (12) and a third stop valve (13) are respectively arranged on two sides of the electromagnetic regulating valve (9); and the second stop valve (12) and the third stop valve (13) are respectively electrically connected with the PLC oxygenation control cabinet.
7. A power plant boiler feed water oxygenation device according to claim 2, characterised in that the flow regulation means (52) comprises a manual regulating valve (19).
8. The power plant boiler feed water oxygenation device according to claim 1 or 2, characterized in that the flow monitoring device (53) comprises a flow monitor (10) and a stop valve six (16) which are arranged in parallel through a pipeline, and a stop valve four (14) and a stop valve five (15) are respectively arranged on two sides of the flow monitor (10); and the flow monitor (10), the stop valve IV (14) and the stop valve V (15) are respectively electrically connected with the PLC oxygenation control cabinet.
9. The power plant boiler feed water oxygenation device of claim 1 or 2, characterized by further comprising a hydrogen conductance detection device and a dissolved oxygen detection device, wherein the hydrogen conductance detection device and the dissolved oxygen detection device are respectively electrically connected with the PLC oxygenation control cabinet.
10. A power plant boiler feed water oxygenation device according to claim 8, characterised in that the flow monitor (10) is a gas rotameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120425275.5U CN214745676U (en) | 2021-02-26 | 2021-02-26 | Water supply and oxygen adding device for power plant boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120425275.5U CN214745676U (en) | 2021-02-26 | 2021-02-26 | Water supply and oxygen adding device for power plant boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214745676U true CN214745676U (en) | 2021-11-16 |
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ID=78590170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120425275.5U Expired - Fee Related CN214745676U (en) | 2021-02-26 | 2021-02-26 | Water supply and oxygen adding device for power plant boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214745676U (en) |
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2021
- 2021-02-26 CN CN202120425275.5U patent/CN214745676U/en not_active Expired - Fee Related
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