CN110017474A - Water developing technique after a kind of Boiler Chemical - Google Patents
Water developing technique after a kind of Boiler Chemical Download PDFInfo
- Publication number
- CN110017474A CN110017474A CN201910237045.3A CN201910237045A CN110017474A CN 110017474 A CN110017474 A CN 110017474A CN 201910237045 A CN201910237045 A CN 201910237045A CN 110017474 A CN110017474 A CN 110017474A
- Authority
- CN
- China
- Prior art keywords
- cleaning
- water
- door
- pressure
- waste liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/52—Washing-out devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/56—Boiler cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Water developing technique after a kind of Boiler Chemical, the process discharges cleaning waste liquid by the way of negative pressure emission first, until the gauge pressure on discharging of waste liquid pipeline is down to 0.05~0.15MPa or so, the vacuum environment of a nearly atmospheric pressure is formed inside cleaning system at this time, then starting cleaning pump carries out water flushing, until system flush is qualified.Air can be prevented to enter inside cleaning system using the new process, air enters inside cleaning system when effectively positive pressure being avoided to discharge, and the metal surface that the dioxygen oxidation wash clean in air occurs leads to the problem of secondary rust；And negative-pressure irrigation process does not need the Nitrogen filling system in nitrogen top row purging method, reduce the work amount of staff, save the expense of temporary system installation, purchase nitrogen, economic benefit is obvious, normal developing method is compared, implementable operability, the economy of negative pressure emission purging method are all more excellent.
Description
Technical field
The invention belongs to industrial equipment chemical cleaning device technical fields, and in particular to clear to a kind of boiler chemical
Wash rear water developing technique.
Background technique
Currently, the flushing of station boiler chemical cleaning later period water generallys use normal pressure emptying concentrated acid liquid or empty using nitrogen top row
Concentrated acid liquid, the mode being then rinsed with cleaning demineralized water, and directly adopt demineralized water and carry out three kinds of works such as top row flushing
Skill mode.When wherein using directly emptying backwashing manner, in cleaning system can into large quantity of air, the economizer cleaned up,
The inside pipe walls active metal surface such as water-cooling wall is easy to react with the oxygen in air, so that metal surface generates secondary corrosion,
Extend washing time, is unfavorable for later period rinsing, the implementation of passivation technology；Demineralized water flushing or demineralized water after nitrogen top row concentrated acid liquid
Although direct top row backwashing manner is avoided that secondary rust problem, but will increase the resistance of system in flushing process, reduces flushing pump
Instantaneous flow, and top row rinse when boiler internal flowing environment it is more stable, internal system disturbance it is smaller, lead to flushing process
In easily there is bias current, occur rinsing be not thorough, rinse the duration it is longer the problems such as so that in next technique variation water quality compared with
Greatly, not only increase rinse water consumption and late stage process steps enforcement difficulty, can also generate a large amount of flushing waste waters, economic and environment-friendly performance
It is poor.So need to find a kind of reasonable, efficient developing technique method, the effect rinsed to improve water after Boiler Chemical
Rate guarantees that subsequent rinse, passivation technology are gone on smoothly.
Summary of the invention
Technical problem to be solved by the present invention lies in above-mentioned the deficiencies in the prior art are overcome, provide it is a kind of it is easy to operate,
It is low in cost, effectively improve after water after cleaning rushes efficiency, ensures the later period Boiler Chemical normally implemented of rinsing passivation technology
Water developing technique.
The technical solution that above-mentioned technical problem uses is solved to comprise the steps of:
Step 1: cleaning terminates the later period, confirm that it is constant to reach balance for acidity, full iron ion in cleaning solution, and monitor pipeline section
It cleans up, temporary system is isolated, shut down cleaning pump, close all exhaust valves in cleaned system, confirm cleaned system
The other exhaust valves and draining valve of exhaust valve and boiler plant primary system are also at closed state；
Step 2: opening cleaning discharging of waste liquid controls door, start discharge cleaning waste liquid, while paying close attention to cleaning discharging of waste liquid control
The pressure tabular value of system in front of the door closes cleaning discharging of waste liquid control when the gauge pressure value that pressure gauge is shown is down to 0.05~0.15MPa
Door, cleaning fluid discharge terminate；
Step 3: Cistern flushing completely and is filled clean demineralized water, start cleaning pump, the water in system；
Step 4: when clean back liquid discharge door pressure gauge reaches cleaning in front of the door when full-water level pressure when, opening clean back liquid
Discharge door starts discharge and rinses.
When the gauge pressure value that pressure gauge is shown in second step of the invention is down to 0.075MPa, cleaning discharging of waste liquid control is closed
Door, cleaning fluid discharge terminate.
Drum boiler is infused by water tank, cleaning pump, economizer, drum, water screen system sequence in third step of the invention
Water；Once-through Boiler is filled the water by water tank, cleaning pump, economizer, water screen system, starting separator system sequence.
The present invention has the advantage that compared with the prior art
1, breaking cleaning, waste liquid is routinely with pressure or normal pressure discharging modes, using being discharged under subnormal ambient.
2, it only needs to close a small amount of exhaust valve it is achieved that easy to operate when negative-pressure irrigation, controllability is strong；With nitrogen top
Row's backwashing manner is compared, and can not only be removed from and be installed lengthy and tedious Nitrogen filling system, but also can also reduce the workload of operator；With
The direct top row mode of demineralized water is compared, and negative-pressure irrigation method can reduce system resistance, is promoted flushing pump power output, is shortened and rinse week
Phase reduces workload.
3, after negative-pressure irrigation, internal system will form a vacuum close to an atmospheric pressure, effectively prevent often
Air enters system and aoxidizes the risk on active metal surface when pressure is put, while can reduce system flush resistance, increases punching
The flushing pressure head of pump is washed, irrigation flow rate and efficiency are improved, shortens the when consumption of flushing process, and rinse passivation procedure for the later period and provide
Better implementation environment.
4, after present invention process method is implemented, the work intensity during nitrogen top row can be effectively reduced, save nitrogen charging
The expense of system installation and nitrogen buying, and washing time can be shortened, rinse water is saved, flushing waste water amount is reduced, and
The power energy consumption in entire flushing process is reduced, economy, environmental-protecting performance are self-evident.
Detailed description of the invention
Fig. 1 is developing technique flow chart of the present invention.
Fig. 2 is application example process flow chart of the present invention.
In figure: 1, drum exhaust valve；2, drum；3, water screen system；4, economizer；5, economizer exhaust valve；6, it cleans
Return Yehmen (ying-Spring point SJ 2)；7, water tank；8, wastewater disposal basin；9, the total door of Chinese effluent；10, cleaning pump entrance door；11, cleaning pump；12, pump discharge is cleaned
Door；13, cleaning feed liquor discharges door；14, liquid discharge door is cleaned back.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples, but the present invention is not restricted to these implement
Example.
Embodiment 1
In Fig. 1, water developing technique after a kind of Boiler Chemical of the present invention is comprised the steps of:
Step 1: cleaning terminates the later period, confirm that it is constant to reach balance for acidity, full iron ion in cleaning solution, and monitor pipeline section
It cleans up, temporary system is isolated, shuts down cleaning pump 11, is then turned off drum exhaust valve 1, cleaning pump entrance door 10, and confirm
Drum exhaust valve 1, economizer exhaust valve 5 and draining valve are completely isolated；
Step 2: opening the total door 9 of Chinese effluent in order, cleaning back liquid discharge door 14, cleaning feed liquor discharge door 13, start
Discharge cleaning waste liquid, while paying close attention to the total door 9 of Chinese effluent, cleaning back liquid discharge door 14, the pressure of cleaning feed liquor discharge door 13 in front of the door
Power tabular value closes cleaning feed liquor discharge door 13, cleans back liquid discharge door when the gauge pressure value that pressure gauge is shown is down to 0.075MPa
14, cleaning fluid discharge terminates；Economizer 4 should discharge completely at this time, whole there are about 15 meters or so water levels inside water screen system 3
A internal system will form the vacuum degree of a nearly atmospheric pressure, can effectively to enter cleaning system internal oxidation active for pre- air-prevention
The problem of metal surface.
Step 3: water tank 7 to be rinsed well to and filled clean demineralized water, cleaning pump entrance door 10 is opened, starts cleaning pump
11, the water in system of cleaning pump outlet portal 12 is opened simultaneously,；Drum boiler presses water tank 7, cleaning pump 11, economizer 4, drum 1, water
3 sequence of cold wall system is filled the water, and Once-through Boiler is by water tank 7, cleaning pump 11, economizer 4, water screen system 3, starting separator system
System sequence is filled the water；Under the vacuum environment of a nearly atmospheric pressure, the resistance of rinse-system can be effectively reduced, promoted and rinsed
The power output of pump, the speed that water rinses in quickening system.
Step 4: when clean back liquid discharge door 14 pressure gauge reaches cleaning in front of the door when full-water level pressure when, opening clean back
Liquid discharge door 14 starts discharge and rinses.In order to improve the instantaneous flow of flushing, door 14 can be discharged by adjusting liquid is cleaned back
Aperture quickly adjusts and clean back the method that liquid discharges the pressure tabular value in front of the door of door 14 and be rinsed.When the water quality for rinsing water outlet reaches
After criterion of acceptability, terminate rinse, open drum exhaust valve 1, economizer exhaust valve 5, establish water tank 7, cleaning pump 11, economizer 4,
Drum 2, water screen system 3, water tank 7 circulation loop, into the later period rinsing, passivation procedure.
Embodiment 2
In above-described embodiment 1, step 2: opening the total door 9 of Chinese effluent in order, cleaning back liquid discharge door in the present embodiment
14, cleaning feed liquor discharge door 13, start discharge cleaning waste liquid, while pay close attention to the total door 9 of Chinese effluent, clean back liquid discharge door 14,
It cleans the pressure tabular value of feed liquor discharge door 13 in front of the door and closes cleaning feed liquor when the gauge pressure value that pressure gauge is shown is down to 0.05MPa
Discharge door 13 cleans back liquid discharge door 14, and cleaning fluid discharge terminates；Remaining each step is identical with embodiment 1.
Embodiment 3
In above-described embodiment 1, step 2: opening the total door 9 of Chinese effluent in order, cleaning back liquid discharge door in the present embodiment
14, cleaning feed liquor discharge door 13, start discharge cleaning waste liquid, while pay close attention to the total door 9 of Chinese effluent, clean back liquid discharge door 14,
It cleans the pressure tabular value of feed liquor discharge door 13 in front of the door and closes cleaning feed liquor when the gauge pressure value that pressure gauge is shown is down to 0.15MPa
Discharge door 13 cleans back liquid discharge door 14, and cleaning fluid discharge terminates；Remaining each step is identical with embodiment 1.
The application example that the present invention is applied to Shandong power plant is as follows:
Shandong II model Thermal generation unit of Installation in Plant Dongfang Boiler Factory DG3033/26.15- two, boiler is super
It is supercritical parameter, transformation Once-through Boiler, opposed firing combustion system, dry ash extraction, single burner hearth, single reheat, balanced draft, complete
Steel Structure (band closed seal), full suspention п type structure.
Its water circulation system: the water that self-supporting water lines come out is located at tail vertical well rear pass lower part by entering on the right side of stokehold
Two intakes in the middle part of economizer entrance header, water flow through and draw economizer by fork type pipe behind horizontally disposed economizer coiled pipe
Hang the economizer exit header of pipe to ceiling or more.Being drawn by economizer exit header both ends concentrates downcomer to enter positioned at pot
The common downcomer dispensing head of furnace arranged on left and right sides, then enter helical water-cooled wall entrance header by being lauched connecting tube.Working medium is through spiral shell
Revolve water screen tube, helical water-cooled wall outlet header, mixing header, vertical water wall entrance header, vertical water-wall tube, vertical water
Enter water-cooling wall outlet mixing header after cold wall outlet header to collect, is introduced pipe and introduce steam-water separator progress steam-water separation.
The water separated when circular flow from separator discharges into water tank from lower part, steam then successively through roof tube, after vertical shaft/level
Flue packet wall, low temperature superheater, pendant superheater and high temperature superheater.Turn after DC operation water cooling wall outlet working medium whole vapour
Change, steam-water separator is used only as steam channel.
Our company has successively carried out chemical cleaning to two units, wherein temporary system installation is set when two unit cleanings
Meter, the model specification of cleaning pump it is completely the same, as shown in Fig. 2, wherein cleaning pump be a preparation and a use, metered flow 600t/h,
Voltage rating is 6kv, rated power 400kw.The chemical cleaning later period selects two kinds of different modes to be rinsed respectively, and following table is
Flushing process supplemental characteristic.
The data from above-mentioned table it is found that negative pressure emission rinse time compared with normal pressure discharge washing time it is 1.5 hours short, and
Water quality is without rebound in flushing process, rinses in later period rinsing liquid that iron concentration is lower, and internal system should not generate Secondary floated rust,
It can effective guarantee passivation effect.If being calculated during rinsing by cleaning pump power output 80%,
Save electric energy: 400kW/h × 1.5h=600kW
Saving demineralized water: 600t/h × 80% × 1.5h=720 tons
Reduce flushing waste amount: wait opposite with water is saved also is 720 tons.
It is found that the time cycle of negative pressure emission purging method, energy consumption, water consumption, waste liquid from two unit cleaning comparisons
The characteristics such as amount are all substantially better than normal pressure purging method.
It is illustrated and described as the basic principles, principal features and advantages of the present invention above.The present invention is not by above-described embodiment
Limitation, the description in above embodiments and description merely illustrates the principles of the invention, and is not departing from spirit of that invention and model
Under the premise of enclosing, various changes and improvements may be made to the invention, these changes and improvements both fall within claimed invention model
In enclosing.
Claims (3)
1. water developing technique after a kind of Boiler Chemical, it is characterised in that comprise the steps of:
Step 1: cleaning terminates the later period, confirm that it is constant to reach balance for acidity, full iron ion in cleaning solution, and monitor pipeline section cleaning
Completely, temporary system is isolated, shuts down cleaning pump, closes all exhaust valves in cleaned primary system, confirms cleaned system
Exhaust valve and draining valve are completely isolated；
Step 2: opening cleaning discharging of waste liquid controls door, start discharge cleaning waste liquid, while paying close attention to cleaning discharging of waste liquid control door
Preceding pressure tabular value closes cleaning discharging of waste liquid and controls door when the gauge pressure value that pressure gauge is shown is down to 0.05~0.15MPa,
Cleaning fluid discharge terminates；
Step 3: Cistern flushing completely and is filled clean demineralized water, start cleaning pump, the water in system；
Step 4: when clean back liquid discharge door pressure gauge reaches cleaning in front of the door when full-water level pressure when, opening clean back liquid discharge
Door starts discharge and rinses.
2. water developing technique after a kind of Boiler Chemical according to claim 1, it is characterised in that: the second step
When the gauge pressure value that middle pressure gauge is shown is down to 0.075MPa, closes cleaning discharging of waste liquid and control door, cleaning fluid discharge terminates.
3. water developing technique after a kind of Boiler Chemical according to claim 1, it is characterised in that: the third step
Middle drum boiler is filled the water by water tank, cleaning pump, economizer, drum, water screen system sequence；Once-through Boiler by water tank, cleaning pump,
Economizer, water screen system, starting separator system sequence are filled the water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910237045.3A CN110017474B (en) | 2019-03-27 | 2019-03-27 | Water washing process after chemical cleaning of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910237045.3A CN110017474B (en) | 2019-03-27 | 2019-03-27 | Water washing process after chemical cleaning of boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110017474A true CN110017474A (en) | 2019-07-16 |
| CN110017474B CN110017474B (en) | 2020-01-21 |
Family
ID=67190057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910237045.3A Active CN110017474B (en) | 2019-03-27 | 2019-03-27 | Water washing process after chemical cleaning of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110017474B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928230A (en) * | 2020-06-24 | 2020-11-13 | 中国能源建设集团华东电力试验研究院有限公司 | Water washing process after chemical cleaning and passivation of boiler |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494328A (en) * | 2011-12-13 | 2012-06-13 | 长沙市中蓝清洗技术有限公司 | Boiler cleaning process |
| CN102305395B (en) * | 2011-07-19 | 2014-05-07 | 贵州电力试验研究院 | Water washing method of concurrent boiler provided with boiler water pump |
| CN204630467U (en) * | 2015-04-02 | 2015-09-09 | 上海华电电力发展有限公司望亭发电厂 | A kind of drum boiler economizer chemically-cleaning device |
| CN105135412A (en) * | 2015-09-17 | 2015-12-09 | 陕西创英电力工程有限公司 | Unit cleaning technology of supercritical boiler |
| CN106051732A (en) * | 2016-07-26 | 2016-10-26 | 中国大唐集团科学技术研究院有限公司华东分公司 | Condensate water cleaning system and condensate water cleaning method based on condensate water cleaning system |
| CN107101525A (en) * | 2017-03-21 | 2017-08-29 | 华电电力科学研究院 | A kind of method cleaned to power plant boiler superheater cyclic chemical |
| CN107795977A (en) * | 2016-09-07 | 2018-03-13 | 新特能源股份有限公司 | The hot purging method of steam generator system and steam generator system |
-
2019
- 2019-03-27 CN CN201910237045.3A patent/CN110017474B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305395B (en) * | 2011-07-19 | 2014-05-07 | 贵州电力试验研究院 | Water washing method of concurrent boiler provided with boiler water pump |
| CN102494328A (en) * | 2011-12-13 | 2012-06-13 | 长沙市中蓝清洗技术有限公司 | Boiler cleaning process |
| CN204630467U (en) * | 2015-04-02 | 2015-09-09 | 上海华电电力发展有限公司望亭发电厂 | A kind of drum boiler economizer chemically-cleaning device |
| CN105135412A (en) * | 2015-09-17 | 2015-12-09 | 陕西创英电力工程有限公司 | Unit cleaning technology of supercritical boiler |
| CN106051732A (en) * | 2016-07-26 | 2016-10-26 | 中国大唐集团科学技术研究院有限公司华东分公司 | Condensate water cleaning system and condensate water cleaning method based on condensate water cleaning system |
| CN107795977A (en) * | 2016-09-07 | 2018-03-13 | 新特能源股份有限公司 | The hot purging method of steam generator system and steam generator system |
| CN107101525A (en) * | 2017-03-21 | 2017-08-29 | 华电电力科学研究院 | A kind of method cleaned to power plant boiler superheater cyclic chemical |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928230A (en) * | 2020-06-24 | 2020-11-13 | 中国能源建设集团华东电力试验研究院有限公司 | Water washing process after chemical cleaning and passivation of boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110017474B (en) | 2020-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110017474A (en) | Water developing technique after a kind of Boiler Chemical | |
| CN203615821U (en) | On-line cleaning device for condenser rubber ball | |
| CN206739263U (en) | A kind of power plant chemistry purging system loop fast switching system | |
| CN217604068U (en) | Adjacent machine heating thermal state flushing system of boiler | |
| CN111550764A (en) | Nuclear power plant starting two-loop flushing method | |
| CN215745275U (en) | Synchronous flushing distribution pipe of direct contact type evaporator | |
| CN109297313A (en) | Sulfuric acid aerosol traps tower, anode furnace technology smoke processing system and method | |
| CN211346504U (en) | Efficient chemical cleaning equipment for condenser | |
| CN205482557U (en) | Energy -conserving cleaning equipment of heat exchanger | |
| CN211199116U (en) | Dry quenching double-super power generation circulating water cooling device | |
| CN210118240U (en) | Automatic blowdown device for cooling water of air compressor | |
| CN208952702U (en) | Sulfuric acid aerosol traps tower, anode furnace technology smoke processing system | |
| CN209052719U (en) | It is a kind of to improve small flushing cinder mesh region water circle device | |
| CN111256516A (en) | Online cleaning method for open-type circulating condenser | |
| CN205635794U (en) | Multifunctional pipe material acid dip pickle | |
| CN216592022U (en) | Cooling water system | |
| CN105928417A (en) | Heating medium water pipe corrosion resisting system and method | |
| CN218410869U (en) | Power plant condenser circulating water side backwashing device | |
| CN109404875A (en) | A kind of cold conditions purging method of the ultra supercritical double reheat boiler without circulating pump | |
| CN212431911U (en) | Condenser rubber ball cleaning system | |
| CN220018316U (en) | Chemical cleaning system for fused salt heat storage unit heat storage island system | |
| CN212841509U (en) | Boiler continuous drainage waste heat recovery device | |
| CN112856382A (en) | System and method for preventing air lock in power station boiler superheater cleaning process | |
| CN215480712U (en) | Novel dust removal and spray system of dust removal washing tower of coal charging and coke discharging ground station | |
| CN213416927U (en) | Steam recovery waste liquid treatment system that diffuses in vexed slag bath |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A Water Flushing Process after Chemical Cleaning of Boilers Effective date of registration: 20230516 Granted publication date: 20200121 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN XIELI POWER TECHNOLOGY Co.,Ltd. Registration number: Y2023610000374 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |