CN208475361U - A kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving - Google Patents
A kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving Download PDFInfo
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- CN208475361U CN208475361U CN201820005298.9U CN201820005298U CN208475361U CN 208475361 U CN208475361 U CN 208475361U CN 201820005298 U CN201820005298 U CN 201820005298U CN 208475361 U CN208475361 U CN 208475361U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
It is a kind of to be applicable in gas fired-boiler and the water-saving system of gas turbine flue gas depth energy saving, it is related to flue gas heat recovery power-saving technology.The patent mainly includes fluoroplastics flue gas heat-exchange unit, circulating pump, lithium bromide absorption type heat pump unit, chemicals dosing plant, voltage stabilization water filling device etc..Its feature is: the fume afterheat discharged fume using fluoroplastics light pipe flue gas heat-exchange unit depth extraction gas fired-boiler and gas turbine, because fluoroplastics have excellent corrosion resistance characteristic, gas fired-boiler and combustion engine exhaust gas temperature can be reduced to water dew point or less that will not cause the corrosion of heat exchanger tube by the heat exchanger, greatly reduce the operation and maintenance cost of depth energy saving equipment；Fluoroplastics light pipe heat exchanger, using indirect heat exchange, flue gas condensing liquid is completely isolated with recirculated cooling water, and circulating cooling water quality is not contaminated, and avoids the etching problem of circulating line and circulating pump；Mating lithium bromide absorption type heat pump unit, not only low temperature cold source can be provided for waste heat recovery of circulatory system, but also the fume afterheat that recirculated water is taken out of can be sufficiently recycled, the function using low-grade heat source production high-quality hot water is realized, system energy efficiency coefficient is greatly improved.
Description
Technical field
This patent is related to flue gas waste heat recovery power-saving technology.
Background technique
Energy-saving and emission-reduction are the important guiding thought in China's structural transformation of the economy escalation process.
Since haze great outburst in 2013, the central heating of key cities is gradually by coal-burning boiler or coal-fired thermal power coproduction
Unit has been changed to gas fired-boiler and gas turbine cogeneration units.Natural gas is a kind of clean energy resource, after burning it is main at
Dividing is N2、CO2、H2O.The outlet exhaust gas temperature of gas fired-boiler or gas turbine cogeneration units waste heat boiler generally 110 ~
160 DEG C, contained amount of heat is deactivated discharge in flue gas, and Mist heat recovering is the important means for improving boiler thermal efficiency,
It is of great significance to energy-saving and emission-reduction.
The energy conserving system recycled currently used for gas fired-boiler and gas turbine flue gas waste heat mainly includes " energy-saving appliance " and " cigarette
Gas condenser ".Energy-saving appliance generally with one time (about 55 DEG C) of heat supply network recirculated water return water be cold source, flue-gas temperature is reduced to 70 ~ 90
DEG C, Mist heat recovering heats heat supply network recirculated water return water, reaches energy-saving benefit.In addition, because of gas fired-boiler or gas turbine thermoelectricity
In the smoke evacuation of coproduction unit, the volume constituent of vapor reaches about 20%, and flue gas aqueous dew point temperature is at 40 ~ 55 DEG C, if will smoke evacuation temperature
Degree is reduced to such as 35 DEG C of water dew point or less, can not only recycle vapor latent heat, play energy-conserving action, moreover it is possible to recovered flue gas condensation
Liquid plays water-saving purpose, this just needs to configure " flue gas condenser ".In addition, lithium bromide absorption type heat pump unit, utilizes bromination
The strong water absorption character of lithium solution, under the driving of the high-quality energy (such as combustion gas, steam or hot water), realize tow taste heat to
The transfer of high-grade heat, energy efficiency coefficient (high-grade heat/driving heat) have significant energy-saving benefit up to 1.6 ~ 1.8.
For flue gas condenser, the tow taste heat in flue gas recirculation cooling water is can be absorbed in lithium bromide heat pump unit, by the portion
Heat recovery is divided to be used for heat hot water.The cold source of low-temperature flue gas condensation is provided simultaneously, it can be to low-grade heat source such as flue gas recirculation
The temperature of cooling water is reduced to about 15 DEG C from about 25 DEG C.
At present in engineer application, flue gas deep condenser mostly uses greatly direct spray condenser or indirect surface condenser,
Direct contact type condenser, using 316L spray column, flue gas is condensed through cooling water spraying temp lowering, disadvantage is that: 1) cigarette
In gas after water spray, nitrate anion, sulfate radical, inferior sulfate radical or chloride ion are contained in solution, corrosivity is stronger, directly sprays cold
Solidifying tower internals are perishable, influence operation stability, and increase maintenance cost；2) flue gas condensing liquid and cooling water are blended in one
It rises and is recycled, recirculated water is corrosive liquids, is wanted to the material of circulating water pipeline, circulating pump and lithium bromide heat exchange pipe of evaporator
It asks higher, increases initial cost.Indirect surface condenser generally uses 316L plate heat exchanger or pipe heat exchanger, though it avoids
The etching problem of circulating line, circulating pump and evaporator with heat pump pipeline, but heat exchanger seriously corroded itself.To sum up, " setting
Standby corrosion " is a great problem of gas fired-boiler or gas turbine flue gas depth UTILIZATION OF VESIDUAL HEAT IN.
Summary of the invention
Based on the above issues, we have proposed a kind of new to be suitable for gas fired-boiler and gas turbine flue gas depth section herein
The water-saving system of energy.In such a system, mating using fluoroplastics light pipe heat exchanger and lithium bromide heat pump unit, realize gas fired-boiler
With the depth UTILIZATION OF VESIDUAL HEAT IN of gas turbine flue gas, achieve the purpose that depth energy saving is water-saving, it is thorough while guaranteeing higher energy efficiency coefficient
Bottom solves the problems, such as equipment and corrosive pipeline.
In order to achieve the above objectives, the technical solution of this patent is realized in the following way.
A kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving, including fluoroplastics light pipe flue gas
Heat exchanger, water circulating pump, lithium bromide heat pump unit, chemicals dosing plant and stable-pressure device etc..
Fluoroplastics light pipe flue gas heat-exchange unit uses fluoroplastics U-tube, hangs on tube sheet, tube sheet is placed on steel structure girder
On, and steel structure girder is a part of flue structure, fluoroplastics U-tube is placed in flue, and recirculated water is walked in pipe, walks cigarette outside pipe
Gas, flue gas and recirculated water cross-flow passes.Recirculated water uses closed cycle, travels to and fro between teflon heat exchanger and lithium bromide heat pump unit
Between, fume afterheat is absorbed in teflon heat exchanger, heat release is cooled in lithium bromide heat pump unit, then passes through circulating pump
Teflon heat exchanger is returned, specific flow chart is detailed in attached drawing.Furthermore pressure stabilizing water charging system is set, guarantee pipe-line system and pump operation
Stability to keep closed cycle water pH value, chemicals dosing plant is set while because fluoroplastics have the sour characteristic of infiltration.
Teflon heat exchanger has the advantage that 1) excellent corrosion resistance, to smoke components and acid dew-point temperature without
It is required that heat exchanger low-temperature corrosion phenomenon can be avoided completely；2) fluoroplastics heat exchange pipe surface and inner wall are all very smooth, pipe foreign cigarette
Dirt is not easy to bond, accumulate, manage in heating agent in heat-transfer surface be difficult fouling, it is possible to reduce the maintenance and wash number of equipment guarantee
It long-term safety can run under the metastable heat transfer coefficient.3) heat resistance is good.The use temperature of polytetrafluoroethylene (PTFE)
It is -180~+260 DEG C, the fluoroplastics hose of processing can well be run in 200 DEG C of various strong corrosive medias below.
In fluoroplastics light pipe heat exchanger, using indirect heat exchange, because using fluoroplastics light pipe, flue gas condensing liquid exchanges heat pipe
Corrosion will not be generated, and flue gas condensing liquid and recirculated cooling water are kept apart, flue gas condensing liquid is after stack base collection
Centralized processing, also avoids the etching problem of the equipment such as circulating water pipeline, circulating pump, thoroughly solves the problems, such as system corrosion, recycles
Pump and circulating line use 20 steel materials, reduce investment cost.
In addition, system support lithium bromide heat pump unit, can sufficiently recycle the fume afterheat that recirculated water is taken out of, it is not only real
Show the function using low-grade heat source production high-quality hot water, while additionally providing the recirculated cooling water of enough low temperatures, it can
Flue-gas temperature is reduced to flue gas water dew point hereinafter, to reach the mesh that water in recovered flue gas steams latent heat and recovered flue gas condensate liquid
, and then accomplish that depth energy saving is water-saving.
Through calculating, by the transformation of the set system, overall boiler efficiency of heating- utilization can be made to improve 10% ~ 15%.
In conclusion this patent " a kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving " has
It has the advantage that.
(1) fume afterheat discharged fume using fluoroplastics light pipe flue gas heat-exchange unit depth extraction gas fired-boiler and gas turbine,
Because fluoroplastics have excellent corrosion resistance characteristic, which can be reduced to water dew point for gas fired-boiler and combustion engine exhaust gas temperature
The corrosion that will not cause heat exchanger tube below, greatly reduces the operation and maintenance cost of depth energy saving equipment；
(2) fluoroplastics light pipe heat exchanger, using indirect heat exchange, flue gas condensing liquid and recirculated cooling water are completely isolated, circulation
Cooling water quality is not contaminated, and avoids the etching problem of circulating line and circulating pump；
(3) mating lithium bromide absorption type heat pump unit not only can provide low temperature cold source for waste heat recovery of circulatory system,
But also the fume afterheat that recirculated water is taken out of can be sufficiently recycled, realize the function using low-grade heat source production high-quality hot water
Can, greatly improve the hot energy efficiency coefficient of system.
Detailed description of the invention
A kind of attached drawing 1: system schematic water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving.
In figure: (1) fluoroplastics light pipe flue gas heat-exchange unit；(2) circulating pump；(3) lithium bromide heat pump unit；(4) chemicals dosing plant；
(5) voltage stabilization water filling device.
Specific embodiment
This patent is further described with the embodiment in concrete case with reference to the accompanying drawing.
By taking certain heating system 2 × 29MW gas-fired water heating boiler fume afterheat depth energy saving water-saving project as an example, in this project
In, every unit has been provided with energy-saving appliance, about 70 DEG C of flue-gas temperature come out from energy-saving appliance.After energy-saving appliance on horizontal flue
It is arranged fluoroplastics light pipe flue gas heat-exchange unit (1), carries out depth energy saving transformation on economy of water cousumption, after teflon heat exchanger, flue-gas temperature quilt
35 DEG C are reduced to hereinafter, into smoke stack emission, flue gas condensing liquid enters at condensate liquid after teflon heat exchanger bottom is collected
Reuse after reason system is handled.In fluoroplastics light pipe flue gas heat-exchange unit (1), flue gas is walked on the outside of light pipe, and recirculated water walks inside,
About 15 DEG C of circulating water intake water temperature, about 22 DEG C of exit water temperature.Lithium bromide absorption type heat pump unit (3) are configured simultaneously, using combustion gas
As driving heat source.The recirculated water for having drawn fume afterheat from teflon heat exchanger enters lithium bromide absorption type heat pump unit (3),
About 15 DEG C are cooled to, is then sent into teflon heat exchanger (1) through circulating pump (2) again, carries out closed cycle, circulating pump (2) is used
In overcome recirculated water in the on-way resistance of system.In lithium bromide heat pump unit (3), combustion gas drives lithium bromide chiller, from
Low-temperature heat quantity is extracted in recirculated water, and for being lifted the temperature of a heat supply network return water, a heat supply network return water temperature is lifted from about 50 DEG C
Rise to about 59 DEG C.The mating chemicals dosing plant of simultaneity factor (4) and voltage stabilization water filling device (5).Sour characteristic is seeped since fluoroplastics have, is added
Medicine device (4) is used to keep the stabilization of pH in Circulating Water, and pressure stabilizing water charging system is pressure before keeping pumping, and in system leak
Timely moisturizing.
Claims (3)
1. a kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving, by fluoroplastics light pipe flue gas heat exchange
Device, circulating pump, lithium bromide absorption type heat pump unit, chemicals dosing plant and voltage stabilization water filling device composition, it is characterised in that: along recirculated water
Direction is disposed with lithium bromide absorption type heat pump unit, chemicals dosing plant, voltage stabilization water filling device, circulating pump and fluoroplastics light pipe cigarette
Gas heat exchanger.
2. a kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving described in accordance with the claim 1,
It is characterized by: fluoroplastics light pipe flue gas heat-exchange unit uses fluoroplastics U-tube, it is placed in flue.
3. a kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving described in accordance with the claim 1,
It is characterized by: recirculated water absorbs fume afterheat in teflon heat exchanger, heat release is cooled in lithium bromide heat pump unit, and
Teflon heat exchanger is returned by circulating pump afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820005298.9U CN208475361U (en) | 2018-01-03 | 2018-01-03 | A kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820005298.9U CN208475361U (en) | 2018-01-03 | 2018-01-03 | A kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving |
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| CN208475361U true CN208475361U (en) | 2019-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820005298.9U Active CN208475361U (en) | 2018-01-03 | 2018-01-03 | A kind of system water-saving suitable for gas fired-boiler and gas turbine flue gas depth energy saving |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855109A (en) * | 2019-03-07 | 2019-06-07 | 华北电力大学 | A kind of the depth recyclable device and its method of heat of smoke discharged from boiler of power station |
| CN115771921A (en) * | 2022-12-19 | 2023-03-10 | 北京新世翼节能环保科技股份有限公司 | Fluoroplastic flue gas waste heat utilization circulating water quality adjusting system and control method |
-
2018
- 2018-01-03 CN CN201820005298.9U patent/CN208475361U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855109A (en) * | 2019-03-07 | 2019-06-07 | 华北电力大学 | A kind of the depth recyclable device and its method of heat of smoke discharged from boiler of power station |
| CN109855109B (en) * | 2019-03-07 | 2023-09-01 | 华北电力大学 | Deep recovery device and method for exhaust gas waste heat of power station boiler |
| CN115771921A (en) * | 2022-12-19 | 2023-03-10 | 北京新世翼节能环保科技股份有限公司 | Fluoroplastic flue gas waste heat utilization circulating water quality adjusting system and control method |
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