CN206330114U - Boiler tail heat-exchanger rig - Google Patents
Boiler tail heat-exchanger rig Download PDFInfo
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- CN206330114U CN206330114U CN201621454405.3U CN201621454405U CN206330114U CN 206330114 U CN206330114 U CN 206330114U CN 201621454405 U CN201621454405 U CN 201621454405U CN 206330114 U CN206330114 U CN 206330114U
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- water
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- pressure coal
- coal saver
- boiler
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Abstract
The utility model provides a kind of boiler tail heat-exchanger rig, including：Low-pressure coal saver, it is located in the back-end ductwork of boiler, and low-pressure coal saver has water inlet and delivery port；Oxygen-eliminating device, it is connected by water return pipeline with the delivery port of low-pressure coal saver；Circulating pump, it is connected by outlet conduit with oxygen-eliminating device, and circulating pump is connected by circulating water pipeline with the water inlet of low-pressure coal saver；Wherein, the jet chimney of boiler is connected with a steam turbine, and steam turbine, which has, condenses water out, condenses water out and is connected by condensing water conduit with the water inlet of low-pressure coal saver.Boiler tail heat-exchanger rig of the present utility model, by setting circulating pump and oxygen-eliminating device on the circulation loop to low-pressure coal saver, before steam turbine operation, deaerated water just can be passed through to low-pressure coal saver, can fully recovery boiler start when flue gas in waste heat, the energy is saved, effectively avoids low-pressure coal saver from damaging its structure in dry-fire condition, reduces maintenance cost.
Description
Technical field
The utility model is related to a kind of heat-exchanger rig, more particularly to the boiler tail in a kind of steam turbine power generation field
Heat-exchanger rig.
Background technology
At present, some domestic boiler of power plant exhaust gas temperatures are higher, cause boiler operating efficiency to reduce, and unit standard coal consumption increases
Plus；If in addition, the upper desulphurization system of power plant, also needs to reduce exhaust gas temperature by a relatively large margin.From power plant's technological transformation angle, there is a variety of
The boiler tail heat-exchanger rig of scheme can reach the purpose of reduction exhaust gas temperature, and in the hot systems of power plant, low-pressure coal saver is
It is a kind of the more commonly used boiler tail heat-exchanger rig.But, traditional low-pressure coal saver connected mode is primarily present following ask
Topic：When being boiler startup and blowpipe, there is no water in condensate line, low-pressure coal saver is in dry-fire condition；Work as steam turbine
During startup, the condensate of low temperature is directly entered the heat exchanger tube of the low-pressure coal saver of dry combustion method, structure and weldering to low-pressure coal saver
Mouth causes different degrees of damage；In addition, waste heat during boiler startup in flue gas also fails to effectively be recycled.
Utility model content
The purpose of this utility model is to provide a kind of boiler tail heat-exchanger rig, and it can be before steam turbine starts to low pressure
Economizer is passed through deaerated water, so that the preferably safe operation of recovery waste heat and guarantee low-pressure coal saver.
Above-mentioned purpose of the present utility model can be realized using following technical proposal：
A kind of boiler tail heat-exchanger rig, including：
Low-pressure coal saver, it is located in the back-end ductwork of boiler, and the low-pressure coal saver has water inlet and delivery port；
Oxygen-eliminating device, it is connected by water return pipeline with the delivery port of the low-pressure coal saver；
Circulating pump, it is connected by outlet conduit with the oxygen-eliminating device, the circulating pump by circulating water pipeline with it is described
The water inlet of low-pressure coal saver is connected；
Wherein, the jet chimney of the boiler is connected with a steam turbine, and the steam turbine, which has, condenses water out, described solidifying
Outlet is born water by condensing water conduit with the water inlet of the low-pressure coal saver to be connected.
Boiler tail heat-exchanger rig as described above, wherein, the water return pipeline is provided with backwater valve.
Boiler tail heat-exchanger rig as described above, wherein, the outlet conduit is provided with flowing water Valve.
Boiler tail heat-exchanger rig as described above, wherein, the circulating water pipeline is provided with recirculated water valve.
Boiler tail heat-exchanger rig as described above, wherein, the condensing water conduit is provided with condensate valve.
Boiler tail heat-exchanger rig as described above, wherein, it is provided between the condensing water conduit and the water return pipeline
Penstock is communicated with connecting pipe, the connecting pipe.
The characteristics of the utility model and advantage are：
Boiler tail heat-exchanger rig of the present utility model, by the circulation loop to low-pressure coal saver set circulating pump and
Oxygen-eliminating device, before steam turbine operation, deaerated water is passed through by oxygen-eliminating device to low-pressure coal saver, fully recovery boiler can be started
When flue gas in waste heat, save the energy, effectively avoid low-pressure coal saver from damaging its structure in dry-fire condition, reduce maintenance
Cost.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the utility model embodiment
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is boiler tail heat-exchanger rig structural representation of the present utility model.
Drawing reference numeral explanation：1st, condensing water conduit；2nd, condensate valve；3rd, low-pressure coal saver；31st, water inlet；32nd, water outlet
Mouthful；4th, boiler back end ductwork；5th, the first backwater valve；6th, recirculated water valve；7th, circulating pump；8th, flowing water Valve；9th, the second backwater
Valve；10th, oxygen-eliminating device；11st, outlet conduit；12nd, circulating water pipeline；13rd, water return pipeline；14th, steam turbine；15th, water out is condensed；
16th, connecting pipe；17th, penstock is connected.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
As shown in figure 1, the utility model provides a kind of boiler tail heat-exchanger rig, including：Low-pressure coal saver 3, it is located at
In boiler back end ductwork 4, low-pressure coal saver 3 has water inlet 31 and delivery port 32；Oxygen-eliminating device 10, its by water return pipeline 13 with
The delivery port 32 of low-pressure coal saver 3 is connected；Circulating pump 7, it is connected by outlet conduit 11 with oxygen-eliminating device 10, and circulating pump 7 passes through
Circulating water pipeline 12 is connected with the water inlet 31 of low-pressure coal saver 3；Wherein, the jet chimney of boiler is connected with a steam turbine 14,
Steam turbine 14, which has, condenses water out 15, condenses water inlet 31 phase of the water out 15 by condensing water conduit 1 and low-pressure coal saver 3
Even.Boiler tail heat-exchanger rig of the present utility model, by setting circulating pump 7 on the circulation loop to low-pressure coal saver 3 and removing
Oxygen device 10, before the operation of steam turbine 14, is passed through deaerated water to low-pressure coal saver 3 by oxygen-eliminating device 10, can fully reclaim pot
Waste heat when stove starts in flue gas, saves the energy, effectively avoids low-pressure coal saver 3 from damaging its structure in dry-fire condition, subtract
Maintenance cost is lacked.
As shown in figure 1, in the present embodiment, water return pipeline 13 is provided with backwater valve, the backwater valve includes first
The backwater valve 9 of backwater valve 5 and second, the break-make of their co- controlling water return pipelines 13；Outlet conduit 11 is provided with outlet valve
Door 8, it controls the break-make of outlet conduit 11；Circulating water pipeline 12 is provided with recirculated water valve 6, and it controls circulating water pipeline 12
Break-make；Condensing water conduit 1 is provided with condensate valve 2, and it controls the break-make of condensing water conduit 1；Condensing water conduit 1 and return pipe
It is communicated with being communicated with penstock 17 on pipeline 16, connecting pipe 16 between road 13, it can control condensing water conduit 1 and return
Break-make between waterpipe 16.
Boiler is the equipment for the interior energy that the chemical energy of fuel is converted into water, during steam turbine 14 is the steam for producing boiler
Interior energy be converted to the mechanical energy of steam turbine 14, generator is that the mechanical energy for the steam turbine 14 that will be coaxially connected is converted into electricity
Energy.Changed by this series of energy and the chemical energy of fuel is converted into electric energy in thermal power plant.Wherein, in this implementation
In mode, steam turbine 14 can produce condensate in the course of the work, and condensate is focused at condensation water out 15, opens condensate
Valve 2, the condensate that steam turbine 14 is produced can be entered in low-pressure coal saver 3 by condensing water conduit 1, realize the circulation profit of water
With.
In the present embodiment, the low-pressure coal saver 3 is arranged in boiler back end ductwork 4, its structure and general economizer phase
It is imitative, the smoke discharging residual heat of its recoverable boiler, to save the energy.The water inlet 31 of low-pressure coal saver 3 is solidifying with steam turbine 14
Bear water outlet 15 to connect, into after the condensed water absorption boiler exhaust gas waste heat of low-pressure coal saver 3, oxygen-eliminating device 10 can be flowed into.This is low
It is known device of the prior art to press economizer 3, in practice, and the water amount of low-pressure coal saver 3, inlet water temperature can be in fortune
Adjusted in row, the features such as it possesses the high coefficient of heat transfer, anti-corrosion and abrasionproof.Low-pressure coal saver 3 is used in the utility model, can be dropped
Low exhaust gas temperature, improves power plant thermal efficiency of cycle.
Because of the oxygen dissolved in water, heavy corrosion can be caused to boiler feedwater pipeline, economizer and other auxiliary devices, so
The utility model uses oxygen-eliminating device 10, can not only remove the dissolved oxygen in boiler feedwater, and can remove the dioxy dissociated in water
Change carbon CO2, nitridation hydrogen NH3, hydrogen sulfide H2The corrosive gas such as S.Salt content and other impurity will not be increased in water after deoxygenation,
Water temperature is general at ambient temperature, and the oxygen content of water outlet remains to meet regulation requirement.
The operation principle of boiler tail heat-exchanger rig of the present utility model is：When boiler startup, steam turbine 14 not yet starts
When, in boiler back end ductwork 4 having high-temperature flue gas passes through, at this moment, opens the first backwater valve 5, the second backwater valve 9, goes out
Penstock 8 and recirculated water valve 6, close condensate valve 2, start circulating pump 7, logical to low-pressure coal saver 3 by oxygen-eliminating device 10
Oxygen-eliminating device 10 is flowed back to after entering the fume afterheat in the deaerated water recovery boiler back-end ductwork 4 in deaerated water, low-pressure coal saver 3,
A water-flow circuit is constituted between oxygen-eliminating device 10, circulating pump 7 and low-pressure coal saver 3, during abundant recycling boiler startup
Fume afterheat；When boiler operatiopn for a period of time after, boiler steam injection steam turbine 14, steam turbine 14 start start, now beat
Condensate valve 2, the first water return pipeline valve 5 and the second water return pipeline valve 9 are opened, recirculated water valve 6 and flowing water Valve is closed
8, then the condensate for condensing the outflow of water out 15 from steam turbine 14 is by the inflow low-pressure coal saver 3 of condensing water conduit 1 and boiler
High-temperature flue gas in back-end ductwork 4 is exchanged heat, then, and the condensate for absorbing heat flows into oxygen-eliminating device 10；When needing steam turbine
When 14 condensate is passed directly into oxygen-eliminating device 10, the connection backwater valve 9 of penstock 17 and second is opened, recirculated water valve 6 is closed
With flowing water Valve 8, condensate valve 2 and the first backwater valve 5 are closed, then the condensate of steam turbine 14 can be passed directly into oxygen-eliminating device
10。
Boiler tail heat-exchanger rig of the present utility model, by setting circulating pump 7 on the circulation loop to low-pressure coal saver 3
With oxygen-eliminating device 10, before boiler startup initial stage, steam turbine operation, deaerated water is passed through to low-pressure coal saver 3 by oxygen-eliminating device 10,
Can fully recovery boiler start when flue gas in waste heat, save the energy, effectively avoid low-pressure coal saver 3 be in dry-fire condition
Its structure is damaged, maintenance cost is reduced.In addition, the deaerated water that the utility model is produced using oxygen-eliminating device 10, which is passed through low pressure, saves coal
In device 3, the dissolved oxygen in feedwater can not only be removed, each line clogging is prevented, and cause the utility model without individually setting
Softening water tank is put, its structure is simpler, invest small, low cost.
The schematical embodiment of the utility model is the foregoing is only, model of the present utility model is not limited to
Enclose.Any those skilled in the art, the made equivalent change on the premise of design of the present utility model and principle is not departed from
Change and change, the scope of the utility model protection all should be belonged to.
Claims (6)
1. a kind of boiler tail heat-exchanger rig, it is characterised in that the boiler tail heat-exchanger rig includes：
Low-pressure coal saver, it is located in the back-end ductwork of boiler, and the low-pressure coal saver has water inlet and delivery port；
Oxygen-eliminating device, it is connected by water return pipeline with the delivery port of the low-pressure coal saver；
Circulating pump, it is connected by outlet conduit with the oxygen-eliminating device, and the circulating pump passes through circulating water pipeline and the low pressure
The water inlet of economizer is connected；
Wherein, the jet chimney of the boiler is connected with a steam turbine, and the steam turbine, which has, condenses water out, the condensate
Outlet is connected by condensing water conduit with the water inlet of the low-pressure coal saver.
2. boiler tail heat-exchanger rig as claimed in claim 1, it is characterised in that the water return pipeline is provided with back-water valve (BWV)
Door.
3. boiler tail heat-exchanger rig as claimed in claim 1, it is characterised in that the outlet conduit is provided with outlet valve
Door.
4. boiler tail heat-exchanger rig as claimed in claim 1, it is characterised in that the circulating water pipeline is provided with recirculated water
Valve.
5. boiler tail heat-exchanger rig as claimed in claim 1, it is characterised in that the condensing water conduit is provided with condensate
Valve.
6. boiler tail heat-exchanger rig as claimed in claim 1, it is characterised in that the condensing water conduit and the return pipe
It is communicated with being communicated with penstock on pipeline, the connecting pipe between road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621454405.3U CN206330114U (en) | 2016-12-27 | 2016-12-27 | Boiler tail heat-exchanger rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621454405.3U CN206330114U (en) | 2016-12-27 | 2016-12-27 | Boiler tail heat-exchanger rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206330114U true CN206330114U (en) | 2017-07-14 |
Family
ID=59292196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621454405.3U Active CN206330114U (en) | 2016-12-27 | 2016-12-27 | Boiler tail heat-exchanger rig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206330114U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609393A (en) * | 2020-05-29 | 2020-09-01 | 青岛创客智造机械设备有限公司 | Boiler synergy integration system |
| CN113513745A (en) * | 2021-06-02 | 2021-10-19 | 华北电力科学研究院有限责任公司 | Low-temperature economizer system with low-temperature corrosion self-blocking function and operation method |
-
2016
- 2016-12-27 CN CN201621454405.3U patent/CN206330114U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609393A (en) * | 2020-05-29 | 2020-09-01 | 青岛创客智造机械设备有限公司 | Boiler synergy integration system |
| CN111609393B (en) * | 2020-05-29 | 2022-04-29 | 青岛创客智造机械设备有限公司 | Boiler synergy integration system |
| CN113513745A (en) * | 2021-06-02 | 2021-10-19 | 华北电力科学研究院有限责任公司 | Low-temperature economizer system with low-temperature corrosion self-blocking function and operation method |
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