CN104950131A - Device for measuring washing flow speed of oxide scale of superheater - Google Patents
Device for measuring washing flow speed of oxide scale of superheater Download PDFInfo
- Publication number
- CN104950131A CN104950131A CN201510415702.0A CN201510415702A CN104950131A CN 104950131 A CN104950131 A CN 104950131A CN 201510415702 A CN201510415702 A CN 201510415702A CN 104950131 A CN104950131 A CN 104950131A
- Authority
- CN
- China
- Prior art keywords
- superheater
- oxide scale
- oxide skin
- flow velocity
- reflux line
- 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
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The invention relates to a device for measuring a washing flow speed of oxide scale of a superheater. The device can measure required flow speed during washing the oxide scale accumulated in pipes of the superheater and comprises a water tank, a water pump, an inlet valve, a flowmeter, an oxide scale loading and unloading tank and a to-be-cleaned superheater W-shaped steel pipe section which are sequentially connected through pipelines, wherein an outlet of a superheater W-shaped steel pipe is connected with a reflow pipeline, and the other end of the reflow pipeline is led to an oxide scale filter screen. Water in the water tank enters the oxide scale loading and unloading tank and the superheater W-shaped steel pipe section through the water pump and the flowmeter to take the oxide scale away, if the weight of the oxide scale filtered out of the filter screen is equal to that of the oxide scale in the oxide scale loading and unloading tank, the condition that the oxide scale is completely washed out of the superheater W-shaped steel pipe is ensured, and the flow speed can be determined according to the flow and the pipeline diameter.
Description
Technical field
The present invention relates to measurement of rate of flow technical field, particularly relate to a kind of determinator for boiler superheater oxide skin irrigation flow rate.
Background technology
Oxide skin cleaning in boiler superheater is a global problem, there is no completely successfully experience in the world.At present, domestic boiler rinsing superheater oxide skin completely successfully example is few, and tracing it to its cause is that the problem of how oxide skin washed down being discharged completely superheater does not also solve.
The phenomenon forming oxide skin in Utility Boiler Superheater pipe is more serious, oxide skin in superheater can split away off to a certain extent afterwards, accumulate in superheater tube, if there is blocking, Yi Fashengyin local overheating and cause superheater tubes burst, cause station boiler out of service, cause security incident.In addition, even superheater line clogging does not cause superheater tubes burst, the oxide skin in superheater also can affect the transmission of heat, increases coal consumption, the economic benefit of generating is reduced.For this reason, the external general method adopted all changes after superheater tubes is run a period of time.Calculate with a 600MW unit boiler, change a superheater and about need about 3,000 ten thousand, the time about needs about 3 months.The domestic way process superheater oxide skin problem also taking replace tubes and chemical cleaning.Although chemical cleaning is than the good economy performance of replace tubes mode, chemical cleaning superheater steel pipe oxide skin still about needs about 1,000 ten thousand, and the time need with about one month, and its financial burden is still very heavy.The technology of chemical cleaning superheater oxide skin is also uncomplicated, and subject matter is that the oxide skin through washing down can accumulate in superheater W type pipe, if do not cleared, and can occurrence of large-area booster after boiler startup.During present cleaning, Problems existing needs great flow velocity and flow the oxide skin water that superheater W type pipe accumulates could to be developed.If flow velocity is too low, then can not rush out, flow velocity is too high, can increase the fund input of cleaning equipment, adds the cost of chemical cleaning.
Summary of the invention
Problem to be solved by this invention is to provide a kind of superheater oxide skin irrigation flow rate determinator, and it can determine the flow velocity needed for oxide skin rinsing and accumulate in superheater tube." required flow velocity " mentioned here refers to minimum flow velocity oxide skin rinsed away completely, as long as be a bit larger tham this flow velocity in practice, for the design of superheater flushing device provides foundation, reaches not only economy but also reliable object.
The technical scheme that the present invention solves the problem is: the superheater oxide skin irrigation flow rate determinator provided comprises the superheater W shape steel tube pipeline section of water tank, water pump, inlet valve, flowmeter, oxide skin loading pot and the needs cleaning connected by pipeline successively, wherein the outlet of superheater W shape steel tube pipeline section connects reflux line, and the other end of reflux line leads to oxide skin screen pack.
During mensuration, the oxide skin in the superheater cleaned out is loaded oxide skin loading pot, open water pump, water in water tank enters oxide skin loading pot by inlet valve, flowmeter, oxide skin is taken away, again by superheater W shape steel tube pipeline section and reflux line, the oxide skin of being discharged by reflux line is filtered net and leaches, if the oxide skin weight that screen pack leaches equals the oxide skin weight in oxide skin loading pot, then show that oxide skin is gone out superheater W shape steel tube completely, can flow velocity be determined according to flow and pipe diameter.The inlet valve of this device is used for adjust flux, to determine the lowest speed of scale sluicing; Theoretically, inlet valve also can be arranged on the outlet side of flowmeter.
The lowest part of above-mentioned reflux line and the difference in height of highest point are more than or equal to the difference in height of lowest part when superheater pipeline works and highest point.The object of such work is the time of day of simulation superheater pipeline, to measure the flow velocity of scale sluicing more accurately.
Conveniently test and reduce test site, above-mentioned superheater W shape steel tube can select the W shape steel tube pipeline section with one or more elbow.
Above-mentioned oxide skin screen pack is arranged on the inflow point of water tank, so just can form the circulation system of a wash-down water.
For the ease of observing the developing result of oxide skin, above-mentioned reflux line has one section at least for transparent pipe.
Advantage of the present invention is: structure is simple, is convenient to make and operation, and cost is cheap, and it is accurate that the oxide skin measured goes out flow velocity.In addition, reflux line can adopt transparent plastic hose, the overall process making testing crew intuitively can arrive oxide skin to go out.According to chemical cleaning scheme not only economy but also science that the flow velocity determined develops, avoid the waste blindly strengthening flow velocity, flow and the human and material resources that cause and financial resources, superheater oxide skin cleaning task can be completed well.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Embodiment
Below in conjunction with drawings and Examples, content of the present invention is described in detail.
Fig. 1 gives the present invention the structure principle chart of an instantiation.Superheater oxide skin irrigation flow rate determinator forms primarily of water tank 1, water pump 2, inlet valve 3, flowmeter 4, oxide skin loading pot 5, superheater W shape steel tube pipeline section 6, reflux line 7 and the oxide skin screen pack 8 be connected successively.The oxide skin screen pack 8 being arranged on water tank inflow point is led in the outlet of reflux line 7, thus realizes recycling of wash-down water, and wherein the in-out end of water pump 2 is respectively equipped with water intaking valve 21 and outlet valve 22.For the superheater of the boiler W type pipeline of domestic 60KW genset, the water tank 1 of this example adopts steel water tank, is of a size of Φ=500mm, H=1000mm; The parameter of water pump 2 is Q=20T/H, H=40m; Flowmeter adopts suspended body flowmeter (Φ=50mm), makes of organic glass; Reflux line 7 adopts diameter to be the transparent plastic hose of 50mm; Need the superheater W shape steel tube pipeline section 6 of chemical cleaning to be W shape steel tube pipeline section with an elbow, its length is L=0.5m; Oxide skin screen pack 8 adopts funnel type plastic filter screen, and its mesh diameter is less than oxide skin size, can filter out whole oxide skin.During test, the difference in height h of reflux line 7 should be more than or equal to the lowest part of superheater pipeline and the difference in height of highest point, usual desirable h=18-20 rice.
The specific operation process of this example is as follows:
1, water tank 1 is full of water, starts water pump 2, whole system is full of water, pump 2 of cutting off the water;
2, take off oxide skin loading pot 5, load prior load weighted oxide skin;
3, oxide skin loading pot is loaded onto;
4, water pump 2 is started;
5, progressively slowly adjust the aperture of inlet valve 3, the adjustment water yield, until the oxide skin of oxide skin loading pot 5 li is all gone out to funnel type plastic filter screen, the data on flows of record suspended body flowmeter 4, can calculate required irrigation flow rate according to this data on flows.
According to irrigation flow rate, establishment chemical flush scheme, in embodiment irrigation flow rate be the 1.1-1.3 of measured value doubly.
Test effect:
1, in Shanghai power plant #1 stove finishing superheater chemical cleaning, irrigation flow rate is measured with superheater oxide skin irrigation flow rate determinator of the present invention, the Chemical cleaning platform of successful 600T/H has carried out the chemical cleaning of finishing superheater, achieve extraordinary effect, run and there is no a booster so far.
In the chemical cleaning of 2, generating plant, Shandong #3 stove finishing superheater, measure irrigation flow rate with superheater oxide skin irrigation flow rate determinator of the present invention, also successfully carried out chemical cleaning, run and so far booster phenomenon does not occur.
Claims (6)
1. superheater oxide skin irrigation flow rate determinator, it is characterized in that: the superheater W shape steel tube pipeline section comprising water tank, water pump, inlet valve, flowmeter, oxide skin loading pot and the needs cleaning connected by pipeline successively, wherein the outlet of superheater W shape steel tube pipeline section connects reflux line, and the other end of reflux line leads to oxide skin screen pack.
2. flow velocity measuring device according to claim 1, is characterized in that the lowest part of reflux line and the difference in height of highest point are more than or equal to the difference in height of lowest part when superheater pipeline works and highest point.
3. flow velocity measuring device according to claim 1 and 2, is characterized in that superheater W shape steel tube pipeline section is the W shape steel tube pipeline section with one or more elbow.
4. flow velocity measuring device according to claim 3, is characterized in that oxide skin screen pack is arranged on the inflow point of water tank.
5. flow velocity measuring device according to claim 4, is characterized in that reflux line has one section at least for transparent pipe.
6. flow velocity measuring device according to claim 4, is characterized in that reflux line adopts transparent plastic hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415702.0A CN104950131B (en) | 2015-07-15 | 2015-07-15 | Superheater oxide skin irrigation flow rate determines device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415702.0A CN104950131B (en) | 2015-07-15 | 2015-07-15 | Superheater oxide skin irrigation flow rate determines device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104950131A true CN104950131A (en) | 2015-09-30 |
| CN104950131B CN104950131B (en) | 2018-04-06 |
Family
ID=54164940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510415702.0A Active CN104950131B (en) | 2015-07-15 | 2015-07-15 | Superheater oxide skin irrigation flow rate determines device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104950131B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB406578A (en) * | 1933-05-04 | 1934-03-01 | Humphreys & Glasgow Ltd | Improvements relating to the manufacture of water gas |
| JPS5753873B2 (en) * | 1976-09-03 | 1982-11-15 | ||
| CN2384886Y (en) * | 1999-08-25 | 2000-06-28 | 张霞 | Container whose liquor outlet possesses outward flanged concave-convex cut-off groove |
| WO2012017741A1 (en) * | 2010-08-05 | 2012-02-09 | 川崎重工業株式会社 | Cleaning method and device for heat transfer tube in marine boiler |
| CN103629657A (en) * | 2013-10-11 | 2014-03-12 | 国家电网公司 | Method and device for monitoring high-temperature oxide scales of generator set |
| CN103672846A (en) * | 2013-12-03 | 2014-03-26 | 广东电网公司电力科学研究院 | Method for monitoring wall temperature of heating surface and thickness of scale cinder of boiler superheater or reheater |
| CN103983299A (en) * | 2014-05-21 | 2014-08-13 | 西安热工研究院有限公司 | Simulation system for boiler superheater oxide skin flushing test |
| CN204807571U (en) * | 2015-07-15 | 2015-11-25 | 西安净源水处理科技有限公司 | Over heater cinder washes hydrometry device |
-
2015
- 2015-07-15 CN CN201510415702.0A patent/CN104950131B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB406578A (en) * | 1933-05-04 | 1934-03-01 | Humphreys & Glasgow Ltd | Improvements relating to the manufacture of water gas |
| JPS5753873B2 (en) * | 1976-09-03 | 1982-11-15 | ||
| CN2384886Y (en) * | 1999-08-25 | 2000-06-28 | 张霞 | Container whose liquor outlet possesses outward flanged concave-convex cut-off groove |
| WO2012017741A1 (en) * | 2010-08-05 | 2012-02-09 | 川崎重工業株式会社 | Cleaning method and device for heat transfer tube in marine boiler |
| CN103629657A (en) * | 2013-10-11 | 2014-03-12 | 国家电网公司 | Method and device for monitoring high-temperature oxide scales of generator set |
| CN103672846A (en) * | 2013-12-03 | 2014-03-26 | 广东电网公司电力科学研究院 | Method for monitoring wall temperature of heating surface and thickness of scale cinder of boiler superheater or reheater |
| CN103983299A (en) * | 2014-05-21 | 2014-08-13 | 西安热工研究院有限公司 | Simulation system for boiler superheater oxide skin flushing test |
| CN204807571U (en) * | 2015-07-15 | 2015-11-25 | 西安净源水处理科技有限公司 | Over heater cinder washes hydrometry device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104950131B (en) | 2018-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105781629B (en) | A kind of temperature of power plant steam turbine steam pipework drain valve control method | |
| CN104128334A (en) | Nitrogen-filled segmental oil flushing method for lubricating oil pipeline of compressor set | |
| CN102500146B (en) | Filtering layer back washing method for percolating water abstraction and control system | |
| CN110130868A (en) | A kind of shale gas desanding separation system and method | |
| CN204807571U (en) | Over heater cinder washes hydrometry device | |
| CN104950131A (en) | Device for measuring washing flow speed of oxide scale of superheater | |
| CN203295530U (en) | Anti-blocking device of pressure guide pipe | |
| CN206057130U (en) | A kind of serosity composite measurement tank | |
| CN207331823U (en) | A kind of reutilization of the sewage washes away belt dressing | |
| CN108086968B (en) | Coal bed gas cluster well skid-mounted device | |
| CN110306555A (en) | Repeated contact grouting structure and grouting method for steep slope building base surface of concrete dam | |
| CN201866018U (en) | Oil filtering device for industrial hydraulic and lubricating system | |
| CN107844150A (en) | A kind of device and flow monitoring and maximum stream flow control method and anti-down irrigation method based on the device | |
| CN204799119U (en) | Reverse osmosis membrane cleaning system | |
| CN203519101U (en) | Water meter with acid-base property detection function | |
| CN209556984U (en) | A kind of novel wellhead quantitative remedy-adding system | |
| CN210216635U (en) | Double-cylinder drainage system of gas power plant | |
| CN203519100U (en) | Multi-functional water meter with water hardness detecting function | |
| CN101732911A (en) | FX backwashing filter | |
| CN106016836A (en) | Sewage source heat pump system | |
| CN113688481B (en) | Numerical simulation method for calculating flow field characteristics of closed bypass pipeline system | |
| CN212384213U (en) | Novel flushing system for acetylene generator instrument liquid level meter | |
| CN105709467B (en) | Sludge drainage system and use its method | |
| CN104457886A (en) | Multifunctional water meter | |
| CN209246778U (en) | A kind of cleaning device suitable for ground buried pipe of ground source heat pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jiang Jian Inventor before: Zhang Jian |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |