CN102899676A - Connecting method and structure of temporary pipes of chemical cleaning system of thermal equipment and washing method - Google Patents
Connecting method and structure of temporary pipes of chemical cleaning system of thermal equipment and washing method Download PDFInfo
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- CN102899676A CN102899676A CN2012104388905A CN201210438890A CN102899676A CN 102899676 A CN102899676 A CN 102899676A CN 2012104388905 A CN2012104388905 A CN 2012104388905A CN 201210438890 A CN201210438890 A CN 201210438890A CN 102899676 A CN102899676 A CN 102899676A
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Abstract
The invention discloses a connecting method and a connecting structure of temporary pipes of a chemical cleaning system of thermal equipment and a washing method. According to the method, outlets of valves 341 on a drainage pipeline of a water storage tank are disconnected from a pipeline which is connected with the side of a drain water expander of a boiler and are connected to the nearest condensed water main pipeline of condensed water which is subjected to precision treatment by a main temporary pipeline; and two secondary temporary pipes are connected to a high-pressure heater emergent drain valves at the tail end and a low-pressure heater drain valve at the tail end on the main temporary pipeline respectively and are in short connection with steam pumps. According to the connecting method and the connecting structure, original equipment can provide chemical cleaning circular power by a simple temporary system and an operation mode without a temporary cleaning pump, an integral system can form a plurality of circulation loops, and the complete thermal equipment can be cleaned; and each circulation loop is switched easily and flexibly, so that independent cleaning at the side of a steam engine can be realized, and the combined cleaning at the side of the steam engine and at the side of the boiler can also be realized.
Description
Technical field
The invention discloses a kind of interim Pipe joining method structure and purging method of heat power equipment chemical cleaning system, belong to fired power generating unit chemical cleaning technique field.
Background technology
Oxidation products, rust-preventive agent, greasy dirt, grease and other organism that newly-built fired power generating unit forms in manufacturing, transportation, storage, installation and Hydraulic Process in order to remove heat power equipment and tubing system internal surface, reduce intrasystem silicate content, must comprise to the pipe-line equipment system matting of water flushing, circulation alkali cleaning and cycle pickling.
The fired power generating unit heat power equipment need to be finished matting by temporary system formation wash cycles loop is installed, and there is following problem in the chemical cleaning system of present domestic large electric power plant unit heat power equipment: need to increase interim scavenging pump in (1) matting temporary system; (2) alkali cleaning of steam turbine side and boiler side can not be connected in series effectively; (3) temporary system is complicated, and is great in constructing amount.
Summary of the invention
The problem to be solved in the present invention is: do not provide a kind of temporary system simply, interim pump need be installed, can realize interim Pipe joining method structure and the purging method of the heat power equipment chemical cleaning system that serial connection is cleaned, to overcome the deficiencies in the prior art.
Technical scheme of the present invention: the interim Pipe joining method of the chemical cleaning system of heat power equipment, the method is that the discharge water outlet of 341 valves on the pipeline and the pipeline that is connected boiler hydrophobic development unit side of water tank disconnected, and connects being exported on the Trunk Line of condensed water nearby after the condensate fine processing of 341 valves with main temporary pipeline in addition; Again after main temporary pipeline connects the secondary interim pipe of two-way to add urgent drain valve to the height of final stage respectively with the low plus hydrophobic valve of final stage after, the short circuit heat pump.
Be provided with valve at the interim pipe of pair.
The interim pipe connecting structure of the chemical cleaning system of heat power equipment, it comprises the deoxygenator that connects with pipeline, the heat pump fore pump, scavenging pump outlet pipe Electrically operated gate, the high-pressure feed water Electrically operated gate, economizer, the lower furnace water wall, mixing header in the middle of the water wall, section's furnace wall cooling, separator, water tank, 341 valves, gland heater water side Electrically operated gate, the low pressure heater group, the high pressure heater group, condensate pump, condenser, connect main temporary pipeline at 341 valve outlet ports, on the Trunk Line of condensed water nearby that main temporary pipeline is connected to condensate fine after processing, again after main temporary pipeline connects the secondary interim pipe of two-way to add urgent drain valve to the height of final stage respectively with the low plus hydrophobic valve of final stage after, the short circuit heat pump.
Be provided with valve at the interim pipe of pair.
The low pressure heater group by
#8 low pressure heaters,
#7 low pressure heaters,
#6 low pressure heaters,
#5 low pressure heaters consist of.
The high pressure heater group by
#3 height add,
#2 height add,
#1 height adds formation.
Be provided with the low plus hydrophobic pipeline between the low pressure heater group.
Be provided with the HP heater drainage pipeline between the high pressure heater group.
The purging method of the chemical cleaning system of the heat power equipment behind the interim pipe is installed, and whole system can form following 4 scavenger circuits:
A, steam turbine boiler combined cleaning systemic circulation loop are: mixing header in the middle of deoxygenator → heat pump fore pump → scavenging pump outlet pipe Electrically operated gate → high-pressure feed water Electrically operated gate → economizer → lower furnace water wall → water wall → upper furnace water wall → separator → water tank → 341 valves → main temporary pipeline → gland heater water side Electrically operated gate → low pressure heater group → deoxygenator;
B, condensate system clean cycle loop are: condenser → condensate pump → gland heater) →
#8 low pressure heaters →
#7 low pressure heaters →
#6 low pressure heaters →
#5 low pressure heaters → deoxygenator → deoxygenator offlet → condenser that overflows;
C, clean cycle loop, high pressure heater lateral steam tube road are: condenser → condensate pump → secondary temporary pipeline →
#3 height add urgent unrestrained water valve →
#3 height add → the HP heater drainage pipeline →
#2 height add → the HP heater drainage pipeline →
#1 height adds →
#1 height adds urgent unrestrained water valve → condenser;
D, clean cycle loop, low pressure heater lateral steam tube road are: condenser → condensate pump → temporary pipeline →
#8 low add normal drain valve →
#8 low adding → low plus hydrophobic pipelines →
#7 low pressure heaters → low plus hydrophobic pipeline →
#6 low pressure heaters → low plus hydrophobic pipeline →
#5 low pressure heaters →
#5 low add urgent unrestrained water pipe → condenser.
Compared with prior art, by the connection of temporary system, the circulation power of scavenging solution is provided by condensate pump and heat pump fore pump, does not need to increase interim scavenging pump, whole system both can realize the independent cleaning of steam turbine side, also can realize the combined cleaning of steam turbine side and boiler side.
Simultaneously the present invention is by a kind of simple temporary system and operating method, take full advantage of existing equipment the matting circulation power is provided, do not need to increase interim scavenging pump, whole system can form a plurality of circulation loops, clean range has been included whole heat power equipments, and the switching of each circulation loop is simple, flexible, can realize the independent cleaning of steam turbine side, also can realize the combined cleaning of steam turbine side and boiler side.The whole system temporary system is few, do not have interim power-equipment, construction volume is little, a large amount of construction costs and time have been saved (preferably replenishing the comparison sheet of existing construction cost, time and existing construction cost and time), therefore the present invention can bring good economic benefit to fired power generating unit, has the meaning of popularization.
Figure of description
Fig. 1 is structural representation of the present invention;
The interim pipeline that adds of heavy line representative among the figure;
Among the figure, mixing header, 8-section furnace wall cooling, 9-separator, 10-water tank, 11-341 valve, 12-gland heater water side Electrically operated gate, 13-in the middle of 1-deoxygenator, 2-heat pump fore pump, 3-scavenging pump outlet pipe Electrically operated gate, 4-high-pressure feed water Electrically operated gate, 5-economizer, 6-lower furnace water wall, the 7-water wall
#5 low pressure heaters, 14-
#6 low pressure heaters, 15-
#7 low pressure heaters, 16-
#8 low pressure heaters, 17-condenser, 18-condensate pump, 19-gland heater, 20-
#3 height add urgent unrestrained water valve, the excessive offlet of 21-deoxygenator, 22-
#1 height adds urgent unrestrained water valve 23-
#1 height adds, 24, HP heater drainage pipeline, 25-
#2 height add, 26-
#3 height add, 27-
#8 low normal drain valve, 28-low plus hydrophobic pipeline, the 29-of adding
#5 low urgent unrestrained water pipe, 30-heat pump, 31-master's temporary pipeline, 32-condensed water Trunk Line, the secondary interim pipes of 33-of adding
Embodiment
Embodiment: the connection of the parts such as fired power generating unit heat power equipment valve is with reference to Fig. 1, for the cleaning of finishing the fired power generating unit heat power equipment need to be finished matting by temporary system formation wash cycles loop is installed, the method of attachment of temporary system of the present invention is that the discharge water outlet of 341 valves 11 on the pipeline and the pipeline that is connected boiler hydrophobic development unit side of water tank 10 disconnected, and connects being exported on the Trunk Line of condensed water nearby 32 after the condensate fine processing of 341 valves 11 with main temporary pipeline 31 in addition; Again after main temporary pipeline 31 connects the secondary interim pipe 33 of two-way to add urgent drain valve to the height of final stage respectively with the low plus hydrophobic valve of final stage after, short circuit heat pump 30.Concrete being operating as in 11 outlets of 341 valves connects main temporary pipeline 31, on the Trunk Line of condensed water nearby 32 that main temporary pipeline 31 is connected to condensate fine after processing, again after main temporary pipeline 31 connects the secondary interim pipe 33 of two-way to add urgent drain valve to the height of final stage respectively with the low plus hydrophobic valve of final stage after, short circuit heat pump 30 is provided with valve for ease of being controlled at secondary interim pipe 33.
Wherein the low pressure heater group by
#8 low pressure heaters 16,
#7 low pressure heaters 15,
#6 low pressure heaters 14,
#5 low pressure heaters 13 consist of; Be provided with low plus hydrophobic pipeline 28 between the low pressure heater group.The high pressure heater group by
#3 height add 26,
#2 height add 25,
#1 height adds 23 and consists of; Be provided with HP heater drainage pipeline 24 between the high pressure heater group.
After connecting interim pipeline by mode provided by the invention, whole system can form following 4 scavenger circuits:
A, steam turbine boiler combined cleaning systemic circulation loop are: mixing header 7 → upper furnace water wall 8 → separator 9 → water tank 10 → 341 valves 11 → main temporary pipeline 31 → gland heater water side Electrically operated gate 12 in the middle of deoxygenator 1 → heat pump fore pump (2) → scavenging pump outlet pipe Electrically operated gate 3 → high-pressure feed water Electrically operated gate 4 → economizer 5 → lower furnace water wall 6 → water wall →
#8 low pressure heaters 16 →
#7 low pressure heaters 15 →
#6 low pressure heaters 14 →
#5 low pressure heaters, 13 → deoxygenator 1;
B, condensate system clean cycle loop are: condenser 17 → condensate pump 18 → gland heater 19 →
#8 low pressure heaters 16 →
#7 low pressure heaters 15 →
#6 low pressure heaters 14 →
#5 low pressure heaters, 13 → deoxygenator, 1 → deoxygenator offlet 21 → condenser 17 that overflows;
C, clean cycle loop, high pressure heater lateral steam tube road are: condenser 17 → condensate pump 18 → secondary temporary pipeline 33 →
#3 height add urgent unrestrained water valve 20 →
#3 height add 26 → HP heater drainage pipeline 24 →
#2 height add 25 → HP heater drainage pipeline 24 →
#1 height adds 23 →
#1 height adds urgent unrestrained water valve 22 → condenser 17;
D, clean cycle loop, low pressure heater lateral steam tube road are: condenser 17 → condensate pump 18 → temporary pipeline 33 →
#8 low add normal drain valve 2) →
#8 low add 17 → low plus hydrophobic pipeline 28 →
#7 low pressure heaters, 16 → low plus hydrophobic pipeline 28 →
#6 low pressure heaters, 15 → low plus hydrophobic pipeline 28 →
#5 low pressure heaters 14 →
#5 low add urgent unrestrained water pipe 29 → condenser 17.
Claims (9)
1. the interim Pipe joining method of the chemical cleaning system of a heat power equipment, it is characterized in that: the method is that the discharge water outlet of 341 valves (11) on the pipeline and the pipeline that is connected boiler hydrophobic development unit side of water tank (10) disconnected, and connects being exported on the Trunk Line of condensed water nearby (32) after the condensate fine processing of 341 valves (11) with main temporary pipeline (31) in addition; Again after main temporary pipeline (31) connects the secondary interim pipe of two-way (33) to add urgent drain valve to the height of final stage respectively with the low plus hydrophobic valve of final stage after, short circuit heat pump (30).
2. the interim Pipe joining method of the chemical cleaning system of heat power equipment according to claim 1 is characterized in that: manage (33) in pair temporarily and be provided with valve.
3. the interim pipe connecting structure of the chemical cleaning system of a heat power equipment, it comprises the deoxygenator (1) that connects with pipeline, heat pump fore pump (2), scavenging pump outlet pipe Electrically operated gate (3), high-pressure feed water Electrically operated gate (4), economizer (5), lower furnace water wall (6), mixing header (7) in the middle of the water wall, section's furnace wall cooling (8), separator (9), water tank (10), 341 valves (11), gland heater water side Electrically operated gate (12), the low pressure heater group, the high pressure heater group, condenser (17), condensate pump (18), gland heater (19);
#1 height adds urgent unrestrained water valve (22), it is characterized in that: connect main temporary pipeline (31) in 341 valves (11) outlet, on the Trunk Line of condensed water nearby (32) that main temporary pipeline (31) is connected to condensate fine after processing, again after main temporary pipeline (31) connects the secondary interim pipe of two-way (33) to add urgent drain valve to the height of final stage respectively with the low plus hydrophobic valve of final stage after, short circuit heat pump (30).
4. the interim pipe connecting structure of the chemical cleaning system of heat power equipment according to claim 3 is characterized in that: manage (33) in pair temporarily and be provided with valve.
5. the interim pipe connecting structure of the chemical cleaning system of heat power equipment according to claim 3 is characterized in that: the low pressure heater group by
#8 low pressure heaters (16),
#7 low pressure heaters (15),
#6 low pressure heaters (14),
#5 low pressure heaters (13) consist of.
6. the interim pipe connecting structure of the chemical cleaning system of heat power equipment according to claim 3 is characterized in that: the high pressure heater group by
#3 height add (26),
#2 height add (25),
#1 height adds (23) and consists of.
7. the interim pipe connecting structure of the chemical cleaning system of heat power equipment according to claim 5 is characterized in that: be provided with low plus hydrophobic pipeline (28) between the low pressure heater group.
8. the interim pipe connecting structure of the chemical cleaning system of heat power equipment according to claim 6 is characterized in that: be provided with HP heater drainage pipeline (24) between the high pressure heater group.
9. mode is installed the purging method of the chemical cleaning system of the heat power equipment behind the interim pipe as claimed in claim 3, and it is characterized in that: whole system can form following 4 scavenger circuits:
A, steam turbine boiler combined cleaning systemic circulation loop are: mixing header (7) in the middle of oxygen-eliminating device (1) → heat pump fore pump (2) → scavenging pump outlet Electrically operated gate (3) → high-pressure feed water Electrically operated gate (4) → economizer (5) → lower furnace water-cooling wall (6) → water-cooling wall → upper furnace water-cooling wall (8) → separator (9) → storage tank (10) → 341 valve (11) → main temporary pipeline (31) → gland heater water side Electrically operated gate (12) → low-pressure heater group → oxygen-eliminating device (1);
B, condensate system clean cycle loop are: condenser (17) → condensate pump (18) → gland heater (19) →
#8 low pressure heaters (16) →
#7 low pressure heaters (15) →
#6 low pressure heaters (14) →
#5 low pressure heaters (13) → deoxygenator (1) → deoxygenator offlet (21) → condenser (17) that overflows;
C, clean cycle loop, high pressure heater lateral steam tube road are: condenser (17) → condensate pump (18) → secondary temporary pipeline (33) →
#3 height add urgent unrestrained water valve (20) →
#3 height add (26) → HP heater drainage pipeline (24) →
#2 height add (25) → HP heater drainage pipeline (24) →
#1 height add (23) →
#1 height adds urgent unrestrained water valve (22) → condenser (17);
D, clean cycle loop, low pressure heater lateral steam tube road are: condenser (17) → condensate pump (18) → temporary pipeline (33) →
#8 low add normal drain valve (27) →
#8 low add (17) → low plus hydrophobic pipeline (28) →
#7 low pressure heaters (16) → low plus hydrophobic pipeline (28) →
#6 low pressure heaters (15) → low plus hydrophobic pipeline (28) →
#5 low pressure heaters (14) →
#5 low urgent unrestrained water pipe (the 29) → condensers (17) that add.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438890.5A CN102899676B (en) | 2012-11-07 | 2012-11-07 | Connecting method and structure of temporary pipes of chemical cleaning system of thermal equipment and washing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438890.5A CN102899676B (en) | 2012-11-07 | 2012-11-07 | Connecting method and structure of temporary pipes of chemical cleaning system of thermal equipment and washing method |
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| Publication Number | Publication Date |
|---|---|
| CN102899676A true CN102899676A (en) | 2013-01-30 |
| CN102899676B CN102899676B (en) | 2014-12-10 |
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|---|---|---|---|
| CN201210438890.5A Expired - Fee Related CN102899676B (en) | 2012-11-07 | 2012-11-07 | Connecting method and structure of temporary pipes of chemical cleaning system of thermal equipment and washing method |
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Cited By (2)
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| CN104338704A (en) * | 2014-09-16 | 2015-02-11 | 国家电网公司 | Method and device for cleaning air preheater of coal-fired power plant boiler SCR (selective catalytic reduction) denitration system online |
| CN104748100A (en) * | 2015-04-21 | 2015-07-01 | 中国电力工程顾问集团中南电力设计院有限公司 | High-pressure heater emergency draining depressurization steam escaping system |
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