CN207730083U - A kind of low-level (stack-gas) economizer cleaning system - Google Patents
A kind of low-level (stack-gas) economizer cleaning system Download PDFInfo
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- CN207730083U CN207730083U CN201820064399.3U CN201820064399U CN207730083U CN 207730083 U CN207730083 U CN 207730083U CN 201820064399 U CN201820064399 U CN 201820064399U CN 207730083 U CN207730083 U CN 207730083U
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Abstract
The utility model discloses a kind of low-level (stack-gas) economizer cleaning system, including the flue gas system for the distribution of commodities, water heating system, steaming-out system, compressed air purge system, drainage；Based on the flue gas system for the distribution of commodities, water heating is taken away heat by water heating system by the way that the heat exchange coil in low-level (stack-gas) economizer body interior is arranged, steaming-out system and compressed air purge system exchange hot coil are cleaned, dust is blown off into low-level (stack-gas) economizer body bottom portion, it is cleaned again with clear water by drainage, sewage is excluded.The cleaning system of the utility model utilizes rational method so that low-level (stack-gas) economizer avoids the problem that dust stratification, blocks.
Description
Technical field
The present invention relates to a kind of cleaning systems, and in particular to a kind of low-level (stack-gas) economizer cleaning system belongs to power plant stack gas
Field of waste heat utilization.
Background technology
Coal-fired power plant's heat loss due to exhaust gas is big, accounts for 80% of boiler heat loss or more, if this part heat can fully be recycled, i.e.,
Generatine set heat efficiency can be improved, coal consumption can be also reduced.Low-level (stack-gas) economizer is from the low-pressure heater of steam turbine condensate system
Extraction section condensed water, is sent in low-level (stack-gas) economizer and heats, and is sent to high-pressure heater after heating again.Low-level (stack-gas) economizer is cigarette at present
A kind of mainstream equipment of gas waste heat recovery, when low-level (stack-gas) economizer is arranged in before deduster, can reduce in advance flue-gas temperature from
And the flow of flue gas is reduced, while the specific resistance of flue gas is reduced, efficiency of dust collection is improved, but due to low-level (stack-gas) economizer and flue gas
The problems such as being in direct contact, facing dust stratification, abrasion, corrosion often, once and low-level (stack-gas) economizer dust stratification, heat exchange efficiency can drop significantly
It is low.
Invention content
To solve the above problems, the utility model provides a kind of low-level (stack-gas) economizer cleaning system, using rational method,
So that low-level (stack-gas) economizer avoids the problem that dust stratification, blocks.
The technical solution of the utility model is：A kind of low-level (stack-gas) economizer cleaning system, including the heating of the flue gas system for the distribution of commodities, water
System, steaming-out system, compressed air purge system, drainage；
The flue gas system for the distribution of commodities is：Smoke inlet pipelines are connected with low-level (stack-gas) economizer ontology, low-level (stack-gas) economizer ontology
It is connected with exhanst gas outlet pipeline, exhanst gas outlet pipeline is then connected to deduster；
The water heating system is：Water inlet line is connected by water inlet control valve with heat exchange coil, the heat exchange
Coil pipe is located in low-level (stack-gas) economizer ontology, and with heat exchange coil heat exchange occurs for high-temperature flue gas, after the water in heat exchange coil is heated
It is sent out by outlet conduit；
The steaming-out system is：Steam enters pipeline and is connected with steam blowing equipment by steam control valve；
The compressed air purge system is：Compressed air inlet pipeline enters low temperature by compressed air control valve and saves
In coal device ontology；
The drainage is：Ejected wash water inlet duct is entered by cleaning water control valve in low-level (stack-gas) economizer ontology,
Sewage is discharged by blow-off line and blowdown control valve again.
Further, the ejected wash water inlet duct is connect by bypass valve with compressed air inlet pipeline.
Further, the steam blowing equipment is arranged above heat exchange coil.
Further, the blow-off line in the drainage and blowdown control valve are arranged at low-level (stack-gas) economizer ontology bottom
Portion.
Compared with prior art, the utility model has the beneficial effects that：
1) the utility model using the various ways of steam, compressed air and atomized steam come the product on flushing heat exchanging coil pipe
Ash, cleaning performance is more preferably；
2) the utility model is by the purging of compressed air, can be dry by the liquid dust stratification on heat exchange coil in time or blows
It falls, slows down dust stratification again.
3) it in the utility model when steam insufficient supply, is mixed using compressed air and water, realizes atomization cleaning, saved
The consumption of steam.
After using above-mentioned technical proposal, low-level (stack-gas) economizer dust stratification in the process of running and blockage problem is made to be delayed
Solution, is conducive to the waste heat recovery of flue gas.
Description of the drawings
Attached drawing 1 is the utility model embodiment schematic diagram；
In figure：1, smoke inlet pipelines；2, water inlet line；3, water inlet control valve；4, heat exchange coil；5, outlet conduit；6,
Steam inlet duct；7, steam control valve；8, steam blowing equipment；9, compressed air inlet pipeline；10, compressed air control
Valve；11, ejected wash water inlet duct；12, clean water control valve；13, bypass valve；14, low-level (stack-gas) economizer ontology；15, blow-off line；
16, blowdown control valve；17, exhanst gas outlet pipeline；18, deduster.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings.
Referring to attached drawing 1, the utility model is a kind of low-level (stack-gas) economizer cleaning system, including smoke inlet pipelines 1, water inlet pipe
Road 2, water inlet control valve 3, heat exchange coil 4, outlet conduit 5, steam inlet duct 6, steam control valve 7, steam blowing equipment 8,
Compressed air inlet pipeline 9, compressed air control valve 10, ejected wash water inlet duct 11, cleaning water control valve 12, bypass valve 13,
Low-level (stack-gas) economizer ontology 14, blow-off line 15, blowdown control valve 16, exhanst gas outlet pipeline 17, deduster 18.
Smoke inlet pipelines 1, low-level (stack-gas) economizer ontology 14, exhanst gas outlet pipeline 17, deduster 18 constitute flue gas circulation system
System.Water inlet line 2, water inlet control valve 3, heat exchange coil 4, outlet conduit 5 constitute water heating system.Steam inlet duct 6, steam
Control valve 7, steam blowing equipment 8 constitute steaming-out system.Compression control inlet duct 9, compressed air control valve 10 are constituted
Compressed air purge system.Ejected wash water inlet duct 17, cleaning water control valve 12, blow-off line 15, blowdown control valve 16 are constituted
Drainage.
As shown in Figure 1, when the flue gas smoke inlet pipelines 1 gone out from boiler emission enter in low-level (stack-gas) economizer ontology 14, need
Water to be heated is entered by water inlet line 2, water inlet control valve 3 in heat exchange coil 4, water in heat exchange coil 4 with flue gas
Heat exchange, flue gas are cooled down, and water is heated, to recycle the waste heat in flue gas.Due to the dust of boiler emission
Larger, dust is easy to form dust stratification on heat exchange coil 4.Steam is entered by steam inlet duct 6, steam control valve 7 at this time
To steam blowing equipment 8, steam blowing equipment 8 is arranged above heat exchange coil, and steam is sprayed from steam blowing equipment 8, right
Heat exchange coil 4 carries out deashing.
After steam blowing, it is easy to form part condensed water on heat exchange coil 4, at this point, compressed air control valve 10 is opened,
Compressed air is entered by compressed air inlet pipeline 9 in low-level (stack-gas) economizer ontology 14, and exchange hot coil 4 is blown again
It sweeps, the condensed water on heat exchange coil 4 is all blown off, maintain heat exchange coil 4 to dry, prevent dust accumulation.
If when steam supply amount deficiency, compressed air control valve 10, bypass valve 13 are opened, cleaning water control valve 12 is closed,
Compressed air and water mixing, form high-pressure atomization vapor, and exchange hot coil 4 is purged.
Dust on heat exchange coil 4 is blown off to after 14 bottom of low-level (stack-gas) economizer ontology, and bypass valve 13 is closed, and opens cleaning
Water control valve 12, by washing away for ejected wash water, dust from 4 lower part of low-level (stack-gas) economizer ontology, by blow-off line 15 and blowdown
Control valve 16 is drained.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of low-level (stack-gas) economizer cleaning system, characterized in that including the flue gas system for the distribution of commodities, water heating system, steam clean system
System, compressed air purge system, drainage；
The flue gas system for the distribution of commodities is：Smoke inlet pipelines (1) are connected with low-level (stack-gas) economizer ontology (14), low-level (stack-gas) economizer sheet
Body (14) is connected with exhanst gas outlet pipeline (17), and exhanst gas outlet pipeline (17) is then connected to deduster (18)；
The water heating system is：Water inlet line logical (2) crosses water inlet control valve (3) and is connected with heat exchange coil (4), described
Heat exchange coil (4) is located in low-level (stack-gas) economizer ontology (14), and with heat exchange coil (4) heat exchange, heat exchange coil occur for high-temperature flue gas
(4) water in is sent out after being heated by outlet conduit (5)；
The steaming-out system is：Steam inlet duct (6) passes through steam control valve (7) and steam blowing equipment (8) phase
Even；
The compressed air purge system is：Compressed air inlet pipeline (9) is entered low by compressed air control valve (10)
In warm economizer ontology (14)；
The drainage is：Ejected wash water inlet duct (11) enters low-level (stack-gas) economizer ontology by cleaning water control valve (12)
(14) in, then by blow-off line (15) and blowdown control valve (16) discharge sewage.
2. a kind of low-level (stack-gas) economizer cleaning system according to claim 1, characterized in that the ejected wash water inlet duct
(11) it is connect with compressed air inlet pipeline (9) by bypass valve (13).
3. a kind of low-level (stack-gas) economizer cleaning system according to claim 1, characterized in that the steam blowing equipment
(8) setting is above heat exchange coil (4).
4. a kind of low-level (stack-gas) economizer cleaning system according to claim 1, characterized in that the row in the drainage
Dirty pipeline (15) and blowdown control valve (16) are arranged in low-level (stack-gas) economizer ontology (14) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064399.3U CN207730083U (en) | 2018-01-16 | 2018-01-16 | A kind of low-level (stack-gas) economizer cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064399.3U CN207730083U (en) | 2018-01-16 | 2018-01-16 | A kind of low-level (stack-gas) economizer cleaning system |
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| Publication Number | Publication Date |
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| CN207730083U true CN207730083U (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820064399.3U Active CN207730083U (en) | 2018-01-16 | 2018-01-16 | A kind of low-level (stack-gas) economizer cleaning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137852A (en) * | 2021-04-23 | 2021-07-20 | 华能(浙江)能源开发有限公司玉环分公司 | Air drying method for water-washed low-temperature economizer in boiler flue gas treatment system |
-
2018
- 2018-01-16 CN CN201820064399.3U patent/CN207730083U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137852A (en) * | 2021-04-23 | 2021-07-20 | 华能(浙江)能源开发有限公司玉环分公司 | Air drying method for water-washed low-temperature economizer in boiler flue gas treatment system |
| CN113137852B (en) * | 2021-04-23 | 2022-05-17 | 华能(浙江)能源开发有限公司玉环分公司 | Air drying method for water-washed low-temperature economizer in boiler flue gas treatment system |
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