CN107381763A - Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment system and methods - Google Patents
Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment system and methods Download PDFInfo
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- CN107381763A CN107381763A CN201710548805.3A CN201710548805A CN107381763A CN 107381763 A CN107381763 A CN 107381763A CN 201710548805 A CN201710548805 A CN 201710548805A CN 107381763 A CN107381763 A CN 107381763A
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- ammonia solution
- water
- power station
- fossil fuel
- fired power
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- 238000010979 pH adjustment Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000011218 segmentation Effects 0.000 title claims abstract description 14
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 101
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 75
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 25
- 238000013329 compounding Methods 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 22
- 238000005498 polishing Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 7
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000010612 desalination reaction Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 14
- 239000007864 aqueous solution Substances 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- -1 iron ion Chemical class 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
- C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention relates to a kind of Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment system and methods, can realize therrmodynamic system segmentation pH adjustment controls, water supply system and Drainage System of Low-pressure Heater is in the operating mode for preventing flowing accelerated corrosion and is designed.The present invention includes ammonia solution compounding system and Automatic Dosage Control of Additives system；Its method of adjustment, the low concentration ammonia aqueous solution is prepared using ammonia solution compounding system, using the low concentration ammonia aqueous solution as pH regulators, therrmodynamic system is carried out to be segmented pH adjustment by orienting dosing pipe, water supply system and Drainage System of Low-pressure Heater is in the operating mode for preventing flowing accelerated corrosion；The present invention solves the problems, such as that stokehold water supply system and Drainage System of Low-pressure Heater easily occur to flow accelerated corrosion, while can substantially reduce hydrophobic middle iron-holder to adverse effect caused by therrmodynamic system.
Description
Technical field
The present invention relates to thermal power plant's water-chemical regime field, and pH is segmented more particularly to a kind of new Thermal System of Fossil Fuel-Fired Power Station
Adjustment system and processing method.
Background technology
Improve water pH value be acknowledged as suppress therrmodynamic system occur flowing accelerated corrosion, reduce boiler heating surface in,
The advanced water treatment technology of low-temperature zone scaling rate.Traditional Thermal System of Fossil Fuel-Fired Power Station pH adjustment system is mixed in condensate polishing treatment
Bed outlet main pipe, oxygen-eliminating device down-comer, cold water startup chemical feeding points addition ammonia spirit is closed, controls its pH value to be maintained at alkalescent,
Therrmodynamic system steam flow is alkalized step by step, suppress the dissolution of iron ion in therrmodynamic system.But the ammoniacal liquor used due to adjustment pH
Distribution coefficient with temperature, pressure change and change, in Drainage System of Low-pressure Heater ammoniacal liquor be more easy to gas phase (condenser side) turn
Move, cause concentration of iron increase in Drainage System of Low-pressure Heater, accelerate the frequent generation of Drainage System of Low-pressure Heater flowing accelerated corrosion problem,
Conventional heat system pH methods of adjustment have exposed its drawback.In order to avoid due in Drainage System of Low-pressure Heater ammoniacal liquor to gas phase
Adverse effect caused by transfer, many units carry out changing the maintenance such as pipe after flowing accelerated corrosion occurs for low plus hydrophobic pipeline, but
Can not fundamentally solve the problems, such as the flowing accelerated corrosion of Drainage System of Low-pressure Heater.On the other hand, contain in the low plus hydrophobic being recovered
There is substantial amounts of iron ion, after these iron ions enter follow-up therrmodynamic system, the scaling rate of boiler heating surface can be accelerated, cause pot
Stove water screen tube booster.
In view of above-mentioned, the design people is actively subject to research and innovation, is adjusted to found a kind of Thermal System of Fossil Fuel-Fired Power Station segmentation pH
Whole system and method, make it with more the value in industry.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide a kind of Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment systems
And method, both solved the problems, such as that stokehold water supply system and Drainage System of Low-pressure Heater easily occurred to flow accelerated corrosion, boiler heating surface
The problem of scaling rate is high, hydrophobic middle iron-holder can be substantially reduced again to adverse effect caused by therrmodynamic system.
Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment systems of the present invention, including：Ammonia solution compounding system and Automatic Dosage Control of Additives
System, the ammonia solution compounding system include ammonia solution case, the demineralized water water that the inlet of the ammonia solution case is respectively communicated with
Pipeline, concentrated ammonia liquor bucket pipeline, the concentrated ammonia liquor bucket pipeline are provided with concentrated ammonia liquor bucket delivery pump, and it is molten to be provided with ammonia in the ammonia solution case
Liquid case agitator, the ammonia solution upper box part are provided with the ammonia solution case stirring motor for driving the ammonia solution box mixer, institute
State the delivery port connection outlet pipeline of ammonia solution case；The Automatic Dosage Control of Additives system includes PLC, be arranged on it is described go out
Measuring pump in water lines, the measuring pump electrically connect the PLC, and the outlet pipeline passes through some dosing branch pipes point
Not Lian Tong Thermal System of Fossil Fuel-Fired Power Station condensate polishing treatment mixed bed outlet main pipe, oxygen-eliminating device down-comer, close cold water start side and
Low plus hydrophobic steam side.
Further, the ammonia solution box installed has magnetic double level gauge, and magnetic double level gauge is connected with liquid level sensor, institute
Liquid level sensor electrical connection PLC is stated, the liquid level data that the PLC exports according to liquid level sensor, controls ammonia
Liquid level is maintained at predetermined fluid level in liquor box.
Further, magnetic valve is respectively equipped with each dosing branch pipe, the magnetic valve is electrically connected the PLC controls
Device processed.
Further, connect and be respectively provided with flow sensor, pH on each dosing branch pipe of the outlet pipeline
Table is detected, described flow sensor, pH detections table are connected with described PLC.
Thermal System of Fossil Fuel-Fired Power Station of the present invention is segmented pH methods of adjustment, above-mentioned system, and methods described includes：
Ammonia solution compounding system produces ammonia solution：Demineralized water carrys out water lines and enters ammonia solution box top, meanwhile, from concentrated ammonia liquor
The concentrated ammonia liquor that bucket pipeline comes delivers into ammonia solution bottom portion through concentrated ammonia liquor bucket delivery pump, carrys out water in water lines with demineralized water and mixes
Close, the ammonia solution case stirring motor for being arranged on ammonia solution upper box part drives ammonia solution box mixer to rotate, and mixes demineralized water water
And concentrated ammonia solution；Liquid level sensor automatically controls the liquid level that ammonia solution case remains certain；
Automatic Dosage Control of Additives system carries out being segmented pH adjustment processing, chemical feeding points by orienting dosing to Thermal System of Fossil Fuel-Fired Power Station
It is separately positioned on the outlet of condensate polishing treatment mixed bed main pipe, oxygen-eliminating device down-comer, closes cold water startup chemical feeding points and low plus hydrophobic
Steam side, measuring pump according to condensate polishing treatment mixed bed export main pipe, oxygen-eliminating device down-comer feedwater, close cold water start and it is low plus dredge
The flow signal of water vapour side and the feedback signal of pH tables, and chemical feeding quantity is automatically adjusted by PLC.
Further, the ammonia solution concentration is 0.5%.
Further, the pH of oxidisability water-chemical regime low plus hydrophobic steam side is controlled more than 9.3；Reproducibility water chemistry
The pH of operating mode low plus hydrophobic steam side is controlled more than 9.7.
Compared with prior art, Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment system and methods of the present invention have advantages below：
The newly-increased low plus hydrophobic steam side chemical feeding points of the present invention, can effectively it avoid because ammoniacal liquor easily turns to gas phase condenser side
Move, cause in Drainage System of Low-pressure Heater concentration of iron increase, the problem of Drainage System of Low-pressure Heater flows the frequent generation of accelerated corrosion problem.
After present system, can make low plus hydrophobic steam side pH control more than 9.3 (oxidisability water-chemical regime) or 9.7 with
Upper (reproducibility water-chemical regime), according to the correlation theory and experimental data for suppressing flowing accelerated corrosion, without using hydrazine etc.
Under the oxidisability water-chemical regime of reducing agent, the pH to more than 9.3 of the aqueous solution is improved；In the reproducibility using reducing agents such as hydrazines
Under water-chemical regime, the pH to more than 9.7 of the aqueous solution is improved, can fully suppress to flow the generation of accelerated corrosion.In addition, pass through
The pH of Drainage System of Low-pressure Heater is improved, the content of iron ion in low plus hydrophobic is reduced, slow down the scaling rate of boiler heating surface,
The pickling cycle of boiler is extended, sufficiently lower the booster probability of boiler water-wall tube.The system and method can give full play to
PH suppresses the superiority that flowing accelerated corrosion occurs for Drainage System of Low-pressure Heater, security and warp to improving thermal power generation unit operation
Ji property is significant.
Only it is the general introduction of technical solution of the present invention using described above, in order to better understand the technology hand of the present invention
Section, and can be practiced according to the content of specification, with presently preferred embodiments of the present invention and coordinate accompanying drawing to describe in detail such as below
Afterwards.
Brief description of the drawings
Fig. 1 Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment system schematics of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Embodiment 1
As shown in figure 1, the present embodiment Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment systems, including：Ammonia solution compounding system and
Automatic Dosage Control of Additives system, the ammonia solution compounding system include ammonia solution case 6, and the inlet of the ammonia solution case is respectively communicated with
Demineralized water come water lines 1, concentrated ammonia liquor bucket pipeline 2, the concentrated ammonia liquor bucket pipeline is provided with concentrated ammonia liquor bucket delivery pump 3, the ammonia
Ammonia solution box mixer 4 is provided with liquor box, the ammonia solution upper box part is provided with the ammonia for driving the ammonia solution box mixer
Liquor box stirring motor 5, the delivery port connection outlet pipeline of the ammonia solution case；The Automatic Dosage Control of Additives system includes PLC
Controller 10, the measuring pump being arranged on the outlet pipeline, the measuring pump 9 electrically connect the PLC, the water outlet
The condensate polishing treatment mixed bed that pipeline is respectively communicated with Thermal System of Fossil Fuel-Fired Power Station by some dosing branch pipes is exported under main pipe, oxygen-eliminating device
Drop pipe, close cold water startup side and low plus hydrophobic steam side.Connect and divide equally on each dosing branch pipe of the outlet pipeline
Not She You flow sensor, pH detection table, described flow sensor, pH detections table are connected with described PLC.
Demineralized water come water lines 1 the demineralized water produced using demineralized water between chemistry waterwheel processed, after pressure-reducing valve depressurizes,
Enter ammonia solution case 6 from the top of ammonia solution case 6.Then, the concentrated ammonia liquor of the concentration 25% of purchase, conveyed successively by concentrated ammonia liquor bucket
Enter the bottom of ammonia solution case 6 along concentrated ammonia liquor transfer pipeline after pump 3, pressure-reducing valve decompression, enter ammonia solution through concentrated ammonia liquor water dispensing apparatus
Case 6, carry out water in water lines 1 with demineralized water and be sufficiently mixed dilution.At the same time it is arranged on the ammonia solution case on the top of ammonia solution case 6
Stirring motor 5 drives ammonia solution box mixer 4 to rotate, and mixes demineralized water water and concentrated ammonia solution.
Automatic Dosage Control of Additives system is injected separately into condensate polishing treatment mixed bed by dosing measuring pump 9 and exports main pipe, deoxygenation
Device down-comer, cold water startup chemical feeding points and low plus hydrophobic steam side are closed, measuring pump 9 exports female with condensate polishing treatment mixed bed
Pipe, the feedwater of oxygen-eliminating device down-comer, the flow progress proportion adjustment for closing cold water startup and low plus hydrophobic steam side, the feedback with pH tables
Letter value carries out PID regulations, by PLC 10, condensate polishing treatment mixed bed is exported main pipe, oxygen-eliminating device down-comer, close it is cold
Water starts chemical feeding points and the dosing flow of low plus hydrophobic steam side carries out automatic and accurate adjustment, makes the pH of low plus hydrophobic steam side
Control is more than 9.3 (oxidisability water-chemical regimes) or more than 9.7 (reproducibility water-chemical regimes)；So as to effectively suppress low plus dredge
The flowing accelerated corrosion of water.Medicine system is provided with a stand-by pump, can be isolated to enter using stand-by pump when running dosing pump exception
Row dosing.
The present embodiment operation principle：Ammonia solution is produced first, then using ammonia solution as pH regulators, by orienting chemical feed pipe
Road carries out being segmented pH adjustment to therrmodynamic system, water supply system and Drainage System of Low-pressure Heater is in the work for preventing flowing accelerated corrosion
Condition.
Embodiment 2
The present embodiment Thermal System of Fossil Fuel-Fired Power Station is segmented pH methods of adjustment, and using above-mentioned system, methods described includes：
Step 1：Ammonia solution compounding system produces ammonia solution：Demineralized water carrys out water lines 1 and enters the top of ammonia solution case 6, meanwhile,
The bottom of ammonia solution case 6 is delivered into through concentrated ammonia liquor bucket delivery pump 3 from the concentrated ammonia liquor of concentrated ammonia liquor bucket pipeline 2, with demineralized water water
Water mixes in pipeline 1, and the ammonia solution case stirring motor 5 for being arranged on the top of ammonia solution case 6 drives 4 turns of ammonia solution box mixer
It is dynamic, mix demineralized water water and concentrated ammonia solution；Liquid level sensor 8 automatically controls the liquid level that ammonia solution case 6 remains certain；
Step 2：Automatic Dosage Control of Additives system carries out being segmented pH adjustment processing by orienting dosing to Thermal System of Fossil Fuel-Fired Power Station,
Chemical feeding points, which are separately positioned on the outlet of condensate polishing treatment mixed bed main pipe, oxygen-eliminating device down-comer, close cold water starts chemical feeding points and low
Add hydrophobic steam side, measuring pump 9 exports main pipe, the feedwater of oxygen-eliminating device down-comer according to condensate polishing treatment mixed bed, closes cold water startup
With the flow signal of low plus hydrophobic steam side and the feedback signal of pH tables, and be automatically adjusted by PLC 10 plus
Dose, the pH of low plus hydrophobic steam side is controlled more than 9.3 oxidisability water-chemical regimes or more than 9.7 reproducibility water chemistry works
Condition.
In the present embodiment, the pH of low plus hydrophobic steam side is controlled more than 9.3 (oxidisability water-chemical regime) or more than 9.7
(reproducibility water-chemical regime).The ammonia solution concentration is 0.5%.
In the various embodiments described above, dynamic equilibrium is maintained in order that entering demineralized water and entering concentrated ammonia liquor, so as to keep being configured to
0.5% ammonia solution.The ammonia solution box installed has magnetic double level gauge, and magnetic double level gauge 7 is connected with liquid level sensor 8, institute
Liquid level sensor electrical connection PLC is stated, the liquid level data that the PLC exports according to liquid level sensor, controls ammonia
Liquid level is maintained at predetermined fluid level in liquor box.In order to realize being precisely controlled for the chemical feeding quantity of each dosing branch pipe, it is each described plus
Magnetic valve is respectively equipped with medicine branch pipe, the magnetic valve is electrically connected the PLC.
Described above is only the preferred embodiment of the present invention, is not intended to limit the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is some improvement and
Modification, these improvement and modification also should be regarded as protection scope of the present invention.
Claims (7)
- A kind of 1. Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment systems, it is characterised in that including：Ammonia solution compounding system and dosing are certainly Autocontrol system, the ammonia solution compounding system include ammonia solution case, the desalination that the inlet of the ammonia solution case is respectively communicated with Water comes water lines, concentrated ammonia liquor bucket pipeline, and the concentrated ammonia liquor bucket pipeline is provided with concentrated ammonia liquor bucket delivery pump, set in the ammonia solution case There is ammonia solution box mixer, the ammonia solution upper box part, which is provided with, drives the ammonia solution case of the ammonia solution box mixer to stir electricity Machine, the delivery port connection outlet pipeline of the ammonia solution case；The Automatic Dosage Control of Additives system includes PLC, is arranged on Measuring pump on the outlet pipeline, the measuring pump electrically connect the PLC, and the outlet pipeline passes through some dosings Branch pipe is respectively communicated with the outlet of condensate polishing treatment mixed bed main pipe, the oxygen-eliminating device down-comer of Thermal System of Fossil Fuel-Fired Power Station, closes cold water startup Side and low plus hydrophobic steam side.
- 2. Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment systems according to claim 1, it is characterised in that the ammonia solution case Equipped with magnetic double level gauge, magnetic double level gauge is connected with liquid level sensor, and the liquid level sensor electrically connects PLC, The liquid level data that the PLC exports according to liquid level sensor, liquid level in ammonia solution case is controlled to maintain at predetermined fluid level.
- 3. Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment systems according to claim 1, it is characterised in that each dosing branch Magnetic valve is respectively equipped with pipe, the magnetic valve is electrically connected the PLC.
- 4. Thermal System of Fossil Fuel-Fired Power Station segmentation pH adjustment systems according to claim 1, it is characterised in that each dosing branch Magnetic valve is respectively equipped with pipe, the magnetic valve is electrically connected the PLC.
- 5. a kind of Thermal System of Fossil Fuel-Fired Power Station is segmented pH methods of adjustment, it is characterised in that any described using Claims 1-4 4 System, methods described include：Ammonia solution compounding system produces ammonia solution：Demineralized water carrys out water lines and enters ammonia solution box top, meanwhile, from concentrated ammonia liquor bucket pipe The concentrated ammonia liquor that road is come delivers into ammonia solution bottom portion through concentrated ammonia liquor bucket delivery pump, and carrying out water in water lines with demineralized water mixes, The ammonia solution case stirring motor for being arranged on ammonia solution upper box part drives ammonia solution box mixer to rotate, mix demineralized water water and Concentrated ammonia solution；Liquid level sensor automatically controls the liquid level that ammonia solution case remains certain；Automatic Dosage Control of Additives system carries out being segmented pH adjustment processing, chemical feeding points difference by orienting dosing to Thermal System of Fossil Fuel-Fired Power Station It is arranged on the outlet of condensate polishing treatment mixed bed main pipe, oxygen-eliminating device down-comer, closes cold water startup chemical feeding points and low plus hydrophobic steam Side, measuring pump export main pipe, the feedwater of oxygen-eliminating device down-comer according to condensate polishing treatment mixed bed, close cold water startup and low plus hydrophobic steaming The flow signal of vapour side and the feedback signal of pH tables, and chemical feeding quantity is automatically adjusted by PLC.
- 6. Thermal System of Fossil Fuel-Fired Power Station according to claim 5 is segmented pH methods of adjustment, it is characterised in that the ammonia solution is dense Spend for 0.5%.
- 7. Thermal System of Fossil Fuel-Fired Power Station according to claim 5 is segmented pH methods of adjustment, it is characterised in that oxidisability water chemistry The pH of operating mode low plus hydrophobic steam side is controlled more than 9.3；The pH controls of reproducibility water-chemical regime low plus hydrophobic steam side exist More than 9.7.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109876704A (en) * | 2019-04-08 | 2019-06-14 | 华润电力（沧州运东）有限公司 | With ammonia device and with its generating set |
| CN110182869A (en) * | 2019-07-04 | 2019-08-30 | 西拓能源集团有限公司 | Between a kind of digital intelligent aquation |
| CN111792715A (en) * | 2020-06-01 | 2020-10-20 | 大唐东北电力试验研究院有限公司 | PH adjusting system and method for inhibiting FAC in thermal power plant |
| CN113063139A (en) * | 2021-03-10 | 2021-07-02 | 华电电力科学研究院有限公司 | Intelligent dosing method for boiler |
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