CN209588017U - A kind of system that application starting circulating pump realizes economizer hot water re-circulation - Google Patents
A kind of system that application starting circulating pump realizes economizer hot water re-circulation Download PDFInfo
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- CN209588017U CN209588017U CN201822199141.7U CN201822199141U CN209588017U CN 209588017 U CN209588017 U CN 209588017U CN 201822199141 U CN201822199141 U CN 201822199141U CN 209588017 U CN209588017 U CN 209588017U
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- economizer
- starting
- circulating pump
- pump
- valve
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Abstract
The utility model relates to the systems that a kind of application starting circulating pump realizes economizer hot water re-circulation, belong to coal-fired power station boiler field.The utility model includes starting circulating pump, economizer recirculation conduit, starting separator, water tank, economizer entrance pipe and economizer；The function of economizer hot water re-circulation is realized using the starting circulating pump of boiler matching, without increasing a circulating pump, only need to increase simple pipeline and valve can be realized, system structure is simple, it is transformed more simple, expense is lower, can greatly reduce expense required for increasing circulating pump, save the cost.
Description
Technical field
The utility model relates to the systems that a kind of application starting circulating pump realizes economizer hot water re-circulation, belong to coal-fired electricity
It stands field of boilers.
Background technique
Currently, Environmental Protection Situation is severe, most coal-burning power plant has realized minimum discharge.Wind-powered electricity generation, solar energy development are swift and violent, coal-fired
Unit can largely be reduced using hourage, some coal units, which are in, to stop standby or underrun state, grid company and also require
Increase the depth peak modulation capacity of fired power generating unit, in view of this situation, coal unit boiler will be run in the case where being lower than 50% load,
However under this low load operating mode, denitrating system flue-gas temperature be not able to satisfy denitration investment condition, cause denitration facility without
Method bringing normally into operation influences the qualified discharge of nitrogen oxides.By way of economizer hot water re-circulation, boiler feedwater temperature is improved
Degree reduces economizer caloric receptivity, improves economizer exit flue-gas temperature.Have at present real by increasing a circulating pump and pipeline
The function of existing economizer hot water circuit, such as application No. is 200920046007.1 Chinese patents, and pressure medium is high herein, circulation
Pump and pipeline somewhat expensive.
The utility model realizes the function of economizer hot water re-circulation using the starting circulating pump of boiler matching, without increasing
One circulating pump, only need to increase simple pipeline and valve can be realized, and system structure is simple, and expense is lower.
Utility model content
The purpose of this utility model is that being equipped with and starting for current coal-burning power plant under the background of unit depth peak regulation
The boiler of circulating pump, it is only necessary to which simply increase pipe-line system realizes economizer hot water re-circulation using starting circulating pump
Function.
The technical scheme in the invention for solving the above technical problem is: a kind of application starting circulating pump realization economizer
The system of hot water re-circulation, which is characterized in that including starting circulating pump, economizer recirculation conduit, starting separator, water storage
Tank, economizer entrance pipe and economizer；The starting separator, water tank by economizer entrance pipe and economizer into
Mouth connection, the starting circulating pump are arranged on economizer entrance pipe, and starting circulation is equipped on economizer entrance pipe
Pump inlet shut-off valve, starting circulating-pump outlet shut-off valve, starting circulating-pump outlet regulating valve and check-valves, the starting circulating pump
Inlet shutoff valve is located at the inducer of starting circulating pump, and the starting circulating-pump outlet shut-off valve, starting circulating-pump outlet are adjusted
Valve and check-valves are located at the outlet section of starting circulating pump；The outlet and starting of economizer is arranged in the economizer recirculation conduit
Between the import of circulating pump, and economizer recirculation conduit be connected to starting pump inlet shut-off valve and starting circulating pump it
Between, economizer exit shut-off valve is installed on the economizer recirculation conduit.
Furthermore, the water tank is also connect with flash vessel.
Furthermore, the import of the economizer is also connected with boiler feed pipe.
Furthermore, economizer recirculation conduit converges with economizer entrance pipe in starting pump entry, is formed
Three-way pipeline.
The application starting circulating pump realizes that the working method of the system of economizer hot water re-circulation is as follows:
During unit starting, the water that starting separator is isolated is flowed out by water tank, enters atmosphere flash vessel all the way,
Another way turns hot water to economizer influent header by starting circulating pump, into economizer after being mixed with boiler feedwater, at this point,
Start pump inlet shut-off valve, starting circulating-pump outlet shut-off valve and starting circulating-pump outlet regulating valve to open, economizer goes out
Mouth shut-off valve is closed；
When the operation of the unit commitment system, starting pump inlet shut-off valve is closed, economizer exit shut-off valve is opened,
Economizer exit hot water squeezes into economizer entrance header by the activated circulating pump of economizer recirculation conduit, realizes economizer heat
The function of water recycling.
In the above process, circulating hot water uninterrupted, non-return are adjusted by adjusting starting circulating-pump outlet control valve opening
Valve prevents medium from flowing backwards.
Starting circulating pump is boiler existing equipment itself, and economizer recirculation conduit is newly-increased pipeline, during unit is run
Economizer hot water re-circulation is realized using starting circulating pump, according to the flow area of original starting circulating pump parameter designing circulating hot water
Between.
The utility model compared with prior art, has the following advantages that and effect: the utility model is opened using boiler is original
Dynamic circulating pump realizes that the function of economizer hot water re-circulation, system only need to increase pipe in economizer exit to starting pump entry
Road and valve are easy to run operation, and more existing transformation increases a circulating pump and compares, and greatly reduces cost, and economic benefit is aobvious
It writes.
Detailed description of the invention
Fig. 1 is the structure for realizing the system of economizer hot water re-circulation in the utility model embodiment using starting circulating pump
Schematic diagram.
In figure: starting pump inlet shut-off valve 1, starting circulating pump 2, starting circulating-pump outlet shut-off valve 3, starting circulation
Pump discharge regulating valve 4, check-valves 5, economizer recirculation conduit 6, economizer exit shut-off valve 7, starting separator 8, water tank
9, economizer entrance pipe 10, economizer 11.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1, the system that the application starting circulating pump in the present embodiment realizes economizer hot water re-circulation, including starting
Circulating pump 2, economizer recirculation conduit 6, starting separator 8, water tank 9, economizer entrance pipe 10 and economizer 11；Starting
Separator 8, water tank 9 are connect by economizer entrance pipe 10 with the import of economizer 11, and the setting of starting circulating pump 2 is saving coal
On device entrance pipe 10, starting pump inlet shut-off valve 1, starting circulating-pump outlet are installed on economizer entrance pipe 10
Shut-off valve 3, starting circulating-pump outlet regulating valve 4 and check-valves 5, starting pump inlet shut-off valve 1 are located at starting circulating pump 2
Inducer, starting circulating-pump outlet shut-off valve 3, starting circulating-pump outlet regulating valve 4 and check-valves 5 are located at starting circulating pump 2
Outlet section；Economizer recirculation conduit 6 is arranged between the outlet of economizer 11 and the import of starting circulating pump 2, and economizer
Recirculation conduit 6 is connected between starting pump inlet shut-off valve 1 and starting circulating pump 2, is pacified on economizer recirculation conduit 6
Equipped with economizer exit shut-off valve 7.
In addition, water tank 9 is also connect with flash vessel.The import of economizer 11 is also connected with boiler feed pipe.Economizer is again
Circulating line 6 converges with economizer entrance pipe 10 in starting 2 entrance of circulating pump, forms three-way pipeline.
Realize that the working method of the system of economizer hot water re-circulation is as follows using starting circulating pump:
During unit starting, the water that starting separator 8 is isolated is flowed out by water tank 9, enters atmosphere dilatation all the way
Device, another way turn hot water to 11 influent header of economizer by starting circulating pump 2, economizer are entered after mixing with boiler feedwater
11, at this point, starting pump inlet shut-off valve 1, starting circulating-pump outlet shut-off valve 3 and starting circulating-pump outlet regulating valve 4 are beaten
It opens, economizer exit shut-off valve 7 is closed；
When unit is in underrun, starting pump inlet shut-off valve 1 is closed, economizer exit shut-off valve is opened
7,11 outlet hot water of economizer squeezes into 11 entrance header of economizer by the activated circulating pump 2 of economizer recirculation conduit 6, realizes
The function of 11 hot water re-circulation of economizer.
In the above process, start 4 aperture regulation circulating hot water uninterrupted of circulating-pump outlet regulating valve, non-return by adjusting
Valve 5 prevents medium from flowing backwards.
Starting circulating pump 2 is boiler existing equipment itself, and economizer recirculation conduit 6 is newly-increased pipeline, unit runtime
Between using starting circulating pump 2 realize 11 hot water re-circulation of economizer, according to original starting circulating pump 2 parameter designing circulating hot water
Flow rate zone.
Although the utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model,
Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch,
It all should belong to the protection range of the utility model.
Claims (1)
1. a kind of system that application starting circulating pump realizes economizer hot water re-circulation, which is characterized in that including starting circulating pump
(2), economizer recirculation conduit (6), starting separator (8), water tank (9), economizer entrance pipe (10) and economizer
(11)；Starting separator (8), water tank (9) are connect by economizer entrance pipe (10) with the import of economizer (11),
The starting circulating pump (2) is arranged on economizer entrance pipe (10), is equipped with starting on economizer entrance pipe (10)
Pump inlet shut-off valve (1), starting circulating-pump outlet shut-off valve (3), starting circulating-pump outlet regulating valve (4) and check-valves
(5), starting pump inlet shut-off valve (1) is located at the inducer of starting circulating pump (2), and the starting circulating-pump outlet is cut
Only valve (3), starting circulating-pump outlet regulating valve (4) and check-valves (5) are located at the outlet section of starting circulating pump (2)；Province's coal
Device recirculation conduit (6) is arranged between the import of outlet and starting circulating pump (2) of economizer (11), and economizer recycles
Pipeline (6) is connected between starting pump inlet shut-off valve (1) and starting circulating pump (2), the economizer recirculation conduit
(6) economizer exit shut-off valve (7) are installed on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822199141.7U CN209588017U (en) | 2018-12-26 | 2018-12-26 | A kind of system that application starting circulating pump realizes economizer hot water re-circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822199141.7U CN209588017U (en) | 2018-12-26 | 2018-12-26 | A kind of system that application starting circulating pump realizes economizer hot water re-circulation |
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| Publication Number | Publication Date |
|---|---|
| CN209588017U true CN209588017U (en) | 2019-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822199141.7U Active CN209588017U (en) | 2018-12-26 | 2018-12-26 | A kind of system that application starting circulating pump realizes economizer hot water re-circulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695867A (en) * | 2018-12-26 | 2019-04-30 | 华电电力科学研究院有限公司 | A kind of application starting circulating pump realizes the system and working method of economizer hot water re-circulation |
-
2018
- 2018-12-26 CN CN201822199141.7U patent/CN209588017U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695867A (en) * | 2018-12-26 | 2019-04-30 | 华电电力科学研究院有限公司 | A kind of application starting circulating pump realizes the system and working method of economizer hot water re-circulation |
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