CN206191625U - Full heat recovery system of gas boiler flue gas second grade - Google Patents
Full heat recovery system of gas boiler flue gas second grade Download PDFInfo
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- CN206191625U CN206191625U CN201621236394.1U CN201621236394U CN206191625U CN 206191625 U CN206191625 U CN 206191625U CN 201621236394 U CN201621236394 U CN 201621236394U CN 206191625 U CN206191625 U CN 206191625U
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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
Abstract
The utility model discloses a full heat recovery system of gas boiler flue gas second grade, this system by heat pipe exchanger and graphite gather the second propylene heat exchanger of perfluor, direct combustion type absorption heat pump forms. Heat pipe exchanger mainly retrieves the flue gas sensible heat as one -level heat reclamation device, the circulating water passes through heat pipe exchanger and flue gas heat transfer, and it is direct to the terminal heating of each heating to make hot water, graphite gathers the second propylene heat exchanger of perfluor and direct combustion formula heat pump is second grade heat reclamation device, mainly the latent heat of recycle -water vapour. The circulating water gathers the second propylene heat exchanger of perfluor through graphite must low temperature hot water, and rethread direct combustion type absorption heat pump unit makes high temperature hot water to the terminal heat supply of heating. Adopt the utility model discloses a full heat recovery system of gas boiler flue gas second grade can retrieve the latent heat of flue gas sensible heat and vapor, has improved gas boiler's the thermal efficiency greatly, has realized the make full use of of the energy.
Description
Technical field
The utility model belongs to flue gas total heat recovery field, and in particular to one kind combines heat pipe heat exchanging and the poly- perfluor of graphite
Two grades of total heat recovery systems of gas fired-boiler flue gas of second propylene heat exchanger and direct-fired absorption heat pump technology, for recovered flue gas
In sensible heat and vapor the latent heat of condensation, so as to improve the thermal efficiency of gas fired-boiler.
Background technology
With developing rapidly for Process of Urbanization Construction process, China's building and heating area increases year by year, and heating energy demand is not
It is disconnected to increase.Especially in North City, gas fired-boiler heating is increasingly becoming the main path of central heating.How gas fired-boiler is improved
The thermal efficiency, be increasingly becoming hot issue of concern.
At present, existing back yard industry gas fired-boiler is most of no using Latent heat retracting device, boiler emission
Flue-gas temperature is up to 160 ~ 200 DEG C, and at this temperature, the obvious heat of smoke and vapor amount of latent heat for discharging fume lost are quite may be used
See.Fume afterheat loss is the principal element for influenceing boiler thermal output, therefore, in the sensible heat and vapor in recovered flue gas
Latent heat tool is of great significance.
The main composition of natural gas is hydro carbons, and its burning can produce substantial amounts of vapor, and then produce substantial amounts of vapour
Change latent heat.Research shows, per 1m3The amount of the vapor produced after combustion of natural gas is 1.55kg, with the considerable latent heat of vaporization,
About 3700kJ/Nm3, account for more than the 10% of the low heat valve of natural gas.Traditional gas fired-boiler thermal efficiency can only typically reach
To 90% or so, and if flue-gas temperature is dropped to below dew-point temperature, so that it may the sensible heat of recovered flue gas and the latent heat of vapor,
Calculated by low heat value, the thermal efficiency after recovered flue gas sensible heat and vapor latent heat is up to even more than 110%.Therefore, should
Flue gas total heat recovery is carried out with the utility model and is of great practical significance for improving the thermal efficiency of gas fired-boiler.
Utility model content
In order to overcome the shortcoming of vapor latent heat in the most not recovered flue gas of existing small-sized industrial boiler not enough, this reality
With new there is provided a kind of heat pipe heat exchanging, graphite perfluoroethylene-propylene heat exchanger and Direct fired absorption heat pump technology of combining
Two grades of total heat recovery systems of gas fired-boiler flue gas, the system can not only abundant recovered flue gas sensible heat loss, moreover it is possible to by graphite
The latent heat losses of vapor in perfluoroethylene-propylene heat exchanger and Direct fired absorption heat pump recovered flue gas, so as to be greatly enhanced
The thermal efficiency of gas fired-boiler.
The utility model solves the technical scheme that its technical problem used：
A kind of two grades of total heat recovery systems of gas fired-boiler flue gas, including the first water knockout drum, the first water knockout drum water inlet are set
There is moisturizing pipeline, the first water knockout drum is provided with three delivery ports, and water is pipelined to different heating by three delivery ports
In heat-exchanger rig, the heating to water is realized.
First delivery port connects boiler body, the flue gas connected system flue of boiler body discharge, by cigarette by pipeline
Being disposed with flow of air range tie flue carries out the heat exchange of heat pipe and graphite perfluoroethylene of two-stage heat exchange using flue gas
Propylene heat exchanger, discharges by the flue gas after two-stage heat exchange by system flue, and the delivery port of boiler body is by the water after heating
By pipeline to the second water knockout drum；Flue gas out first passes through heat exchange of heat pipe from boiler body and is once exchanged heat, i.e., and one
Level total heat recovery, the sensible heat of the main recovered flue gas of this process；Flue gas is changed by graphite perfluoroethylene-propylene again after being exchanged heat through one-level
Hot device carries out secondary heat exchange, and this process mainly reclaims the latent heat of vapor, then is absorbed through direct combustion type by the obtained heat source water of heat exchange
Formula source pump produces 65 DEG C or so of heating water.
Second delivery port connects heat exchange of heat pipe by pipeline, and heat exchange of heat pipe is exchanged heat with water by flue gas and realized to water
Heating, heat exchange of heat pipe is by the water after heat exchange by pipeline to the second water knockout drum.
Water is delivered to Direct fired absorption heat pump unit and is heated by the 3rd delivery port by pipeline, direct-fired absorption
Source pump connects graphite perfluoroethylene-propylene heat exchanger by low-temperature return water pipeline, and benefit low temperature is provided with low-temperature return water pipeline
Water tank and water pump is looped back, loop back water pump for low-temperature return water pipeline provides water at low temperature, water at low temperature is by graphite perfluoroethylene third
The heat exchange of alkene heat exchanger is obtained heat source water, and heat source water enters Direct fired absorption heat pump unit and provides thermal source, in direct-fired absorption
Condensed water inside source pump runs into thermal source and forms steam, and it is a large amount of that steam absorbs release by the dense lithium-bromide solution inside unit
Heat, the heat is used to heat the water that comes by pipeline of the 3rd delivery port, afterwards Direct fired absorption heat pump unit
By the water after heating by pipeline to the second water knockout drum.
Second water knockout drum collects three hot water of loop heating, and hot water is delivered to each heating terminal respectively.
Graphite perfluoroethylene-propylene heat exchanger is applied, the heat exchanger has graphite heat conducting coefficient advantage high and poly- perfluor concurrently
The decay resistance of second propylene, when temperature is less than 57 DEG C of flue gas dew point temperature, formed after Water vapor condensation with acid
Recirculated water will not heat exchanging device cause corrosion.
When 180 DEG C or so of flue gas of boiler body discharge is after the heat exchange of heat pipe in the system is once exchanged heat
120 DEG C can be cooled to, its heat for reclaiming can prepare 65 DEG C or so of hot water directly to each heating terminal heat supply.Flue gas afterwards
Carrying out secondary heat exchange through graphite perfluoroethylene-propylene heat exchanger again can be cooled to 50 DEG C or so, and the heat for this time reclaiming can be obtained 25
DEG C or so heat source water, heat source water is obtained 65 DEG C of hot water and supplied water to each heating terminal through Direct fired absorption heat pump unit.Through
Two-stage heat reclamation device is crossed, the full heat of flue gas is preferably reclaimed, and its heating thermal efficiency is up to 107.4%.
Preferably, described system flue downstream afterbody is provided with air-introduced machine, silencer and chimney, convenient that flue gas is quick
Discharge system flue, while reduce noise, many places are provided with air-valve on system flue, and the design of air-valve facilitates work on the spot people
Member adjusts the flue gas flow inside system flue according to actual conditions, it is ensured that the effect of each equipment and flue gas heat exchange.
Preferably, described moisturizing pipeline is provided with two；First moisturizing pipeline water inlet end connects heating running water,
First moisturizing pipeline is disposed with water softening system, water supply tank and circular water replenishing pump along current direction of advance；Article 2 is mended
Water collector is provided with waterpipe；First moisturizing pipeline and Article 2 moisturizing pipeline converge after by global cycle water pump pumps extremely
In first water knockout drum, two designs of water pipe increased the available sources of the system water, improve the practicality of the system
Property.
Preferably, the flue gas that described Direct fired absorption heat pump unit is produced is imported into boiler body with heat through piping
In system flue between heat exchange of heat pipe, this partial fume is directly entered one-level heat-exchanger rig and is exchanged heat in systems so that
The total heat recovery of system is more abundant, thorough.
Preferably, many places are provided with stop valve on each described pipeline, facilitate staff real-time according to field condition
Adjust the flow rate of water flow inside each pipeline.
The utility model has the advantages that：
（1）The utility model is during flue gas total heat recovery, and the temperature drop of flue gas is larger, is carried out using two-stage heat exchanger
Heat exchange is reclaimed, and can guarantee that the abundant recovery of the full heat of flue gas；
（2）The utility model one-level full heat recovery device is heat exchange of heat pipe, with heat transfer property is strong, work when power it is steady
The safe and reliable advantage for being easy to repair of fixed and heat-pipe elements, also, heat exchange of heat pipe installs more careless, and setting angle can basis
Field condition is arranged concretely；
（3）Application graphite perfluoroethylene-propylene heat exchanger in two grades of full heat recovery devices of the utility model, the heat exchanger is simultaneous
The characteristics of tool graphite heat conducting coefficient is high and the decay resistance of perfluoroethylene-propylene, when temperature is less than 57 DEG C of flue gas dew point temperature
When, formed after Water vapor condensation with acid recirculated water will not heat exchanging device cause corrosion, meanwhile, the heat exchanger is excellent to be changed
Hot property can ensure the abundant recovery of vapor latent heat；
（4）The Direct fired absorption heat pump applied in the utility model secondary recovery device can utilize 25 DEG C obtained by heat exchange
Left and right low-temperature water heating produces 65 DEG C or so of heating water, and the wherein generator of direct combustion type heat pump also has flue gas to produce, this part
Flue gas is directly entered one-level heat-exchanger rig and is exchanged heat in systems so that the total heat recovery of system is more abundant, thorough；
（5）Two grades of recyclable obvious heat of smoke of total heat recovery system and water of the gas fired-boiler flue gas that the utility model is provided steam
The latent heat of gas, about 15% is higher by than the thermal efficiency of conventional gas boiler, and this is made full use of with highly important for the energy
Meaning.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Specific embodiment
The utility model is further described below in conjunction with accompanying drawing：
As shown in figure 1, a kind of two grades of total heat recovery systems of gas fired-boiler flue gas, including the first water knockout drum 1, the first water knockout drum
1 water inlet is provided with moisturizing pipeline, and the first water knockout drum 1 is provided with three delivery ports.
First delivery port connects boiler body 2 by pipeline, and the flue gas connected system flue 3 of the discharge of boiler body 2 is pressed
The heat exchange of heat pipe 4 and graphite that be disposed with flow of flue gas range tie flue 3 carries out two-stage heat exchange using flue gas gather complete
Fluoro ethyl propene heat exchanger 5, is discharged by the flue gas after two-stage heat exchange by system flue 3, and the delivery port of boiler body 2 will be heated
Water afterwards is by pipeline to the second water knockout drum 6.
Second delivery port connects heat exchange of heat pipe 4 by pipeline, and it is right that heat exchange of heat pipe 4 is realized by flue gas and water heat exchange
The heating of water, heat exchange of heat pipe 4 is by the water after heat exchange by pipeline to the second water knockout drum 6.
Water is delivered to Direct fired absorption heat pump unit 8 and is heated by the 3rd delivery port by pipeline, and direct combustion type absorbs
Formula source pump 8 connects graphite perfluoroethylene-propylene heat exchanger 5 by low-temperature return water pipeline, and benefit is provided with low-temperature return water pipeline
Low temperature water tank 10 and loop back water pump 11, the delivery port of Direct fired absorption heat pump unit 8 is defeated by pipeline by the water after heating
Deliver to the second water knockout drum 6.
Two grades of total heat recovery System Working Principles of the gas boiler for heating flue gas are：Flue gas is out first from boiler body 2
Once exchanged heat by heat exchange of heat pipe 4, i.e. one-level total heat recovery, the sensible heat of the main recovered flue gas of this process；Flue gas is through one
Secondary heat exchange is carried out by graphite perfluoroethylene-propylene heat exchanger 5 again after level heat exchange, this process mainly reclaims the latent heat of vapor,
Produce 65 DEG C or so of heating water through Direct fired absorption heat pump unit 8 by the obtained heat source water of heat exchange again.
When 180 DEG C or so of boiler discharge of flue gases can after the heat exchange of heat pipe 4 in the system is once exchanged heat
120 DEG C are cooled to, its heat for reclaiming can prepare 65 DEG C or so of hot water directly to each heating terminal heat supply.Flue gas afterwards is again
Carrying out secondary heat exchange through graphite perfluoroethylene-propylene heat exchanger 5 can be cooled to 50 DEG C or so, and the heat for this time reclaiming can be obtained 25
DEG C or so heat source water, heat source water is obtained 65 DEG C of hot water and supplied water to each heating terminal through Direct fired absorption heat pump unit 8.Through
Two-stage heat reclamation device is crossed, the full heat of flue gas is preferably reclaimed, and its heating thermal efficiency is up to 107.4%.
In order to reduce noise so that flue gas smoothly discharge system flue, the described downstream afterbody of system flue 3 is provided with
Air-introduced machine 12, silencer 13 and chimney 14, many places are provided with air-valve 15 on system flue 3.
In order to increased the available sources of the system water, the practicality of the system is improve, described moisturizing pipeline is set
There are two；First moisturizing pipeline water inlet end connects heating running water, first moisturizing pipeline along current direction of advance successively
It is provided with water softening system 16, water supply tank 17 and circular water replenishing pump 18；Water collector 19 is provided with Article 2 moisturizing pipeline；First
Bar moisturizing pipeline and Article 2 moisturizing pipeline are pumped in the first water knockout drum 1 after converging by global cycle water pump 20.
In order that the flue gas total heat recovery for obtaining the generation of Direct fired absorption heat pump unit 8 is more abundant, thorough, described is straight
The flue gas that combustion type absorption type heat pump assembly 8 is produced is imported into the system cigarette between boiler body 2 and heat exchange of heat pipe 4 through piping
In road 3.
Staff is according to the flow rate of water flow inside field condition real-time adjustment each pipeline for convenience, described each
Many places are provided with stop valve 21 on pipeline.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And not to the restriction of implementation method.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no need and unable to be exhaustive to all of implementation method.And thus
Among the obvious change or variation amplified out are still in protection domain of the present utility model.
Claims (5)
1. two grades of total heat recovery systems of a kind of gas fired-boiler flue gas, including the first water knockout drum, it is characterised in that the first water knockout drum enters
The mouth of a river is provided with moisturizing pipeline, and the first water knockout drum is provided with three delivery ports；
First delivery port connects boiler body, the flue gas connected system flue of boiler body discharge, by flue gas stream by pipeline
The heat exchange of heat pipe and graphite perfluoroethylene-propylene that two-stage heat exchange is carried out using flue gas are disposed with dynamic range tie flue
Heat exchanger, discharges by the flue gas after two-stage heat exchange by system flue, and the delivery port of boiler body passes through the water after heating
Pipeline is to the second water knockout drum；
Second delivery port connects heat exchange of heat pipe by pipeline, and heat exchange of heat pipe is exchanged heat by flue gas and water and realizes adding water
Heat, heat exchange of heat pipe is by the water after heat exchange by pipeline to the second water knockout drum；
Water is delivered to Direct fired absorption heat pump unit and is heated by the 3rd delivery port by pipeline, Direct fired absorption heat pump
Unit connects graphite perfluoroethylene-propylene heat exchanger by low-temperature return water pipeline, and benefit low temperature water tank is provided with low-temperature return water pipeline
With loop back water pump, the delivery port of Direct fired absorption heat pump unit is by the water after heating by pipeline to second point of water
Device.
2. a kind of two grades of total heat recovery systems of gas fired-boiler flue gas as claimed in claim 1, it is characterised in that described system
Flue downstream afterbody is provided with air-introduced machine, silencer and chimney, and many places are provided with air-valve on system flue.
3. a kind of two grades of total heat recovery systems of gas fired-boiler flue gas as claimed in claim 2, it is characterised in that described moisturizing
Pipeline is provided with two；First moisturizing pipeline water inlet end connects heating running water, and first moisturizing pipeline advances along current
Direction is disposed with water softening system, water supply tank and circular water replenishing pump；Water collector is provided with Article 2 moisturizing pipeline；First
Bar moisturizing pipeline and Article 2 moisturizing pipeline converge after by global cycle water pump pumps to the first water knockout drum.
4. a kind of two grades of total heat recovery systems of gas fired-boiler flue gas as claimed in claim 3, it is characterised in that described direct combustion
In the system flue that the flue gas that type absorption type heat pump assembly is produced is imported between boiler body and heat exchange of heat pipe through piping.
5. a kind of two grades of total heat recovery systems of gas fired-boiler flue gas as claimed in claim 4, it is characterised in that described each
Many places are provided with stop valve on pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621236394.1U CN206191625U (en) | 2016-11-18 | 2016-11-18 | Full heat recovery system of gas boiler flue gas second grade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621236394.1U CN206191625U (en) | 2016-11-18 | 2016-11-18 | Full heat recovery system of gas boiler flue gas second grade |
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| Publication Number | Publication Date |
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| CN206191625U true CN206191625U (en) | 2017-05-24 |
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| CN201621236394.1U Active CN206191625U (en) | 2016-11-18 | 2016-11-18 | Full heat recovery system of gas boiler flue gas second grade |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489255A (en) * | 2018-11-22 | 2019-03-19 | 青岛国信海天中心建设有限公司 | A kind of flue gas condensing heat recovery apparatus |
| CN111156838A (en) * | 2020-02-12 | 2020-05-15 | 中煤科工(天津)清洁能源研究院有限公司 | High-efficient scale control heat exchanger and industry waste heat recovery system |
| CN111256160A (en) * | 2020-02-27 | 2020-06-09 | 郑州欧纳尔冷暖科技有限公司 | Flue gas waste heat recovery system |
-
2016
- 2016-11-18 CN CN201621236394.1U patent/CN206191625U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489255A (en) * | 2018-11-22 | 2019-03-19 | 青岛国信海天中心建设有限公司 | A kind of flue gas condensing heat recovery apparatus |
| CN111156838A (en) * | 2020-02-12 | 2020-05-15 | 中煤科工(天津)清洁能源研究院有限公司 | High-efficient scale control heat exchanger and industry waste heat recovery system |
| CN111256160A (en) * | 2020-02-27 | 2020-06-09 | 郑州欧纳尔冷暖科技有限公司 | Flue gas waste heat recovery system |
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