CN208703993U - A kind of high-efficiency energy-saving gas-fired boiler central heating system - Google Patents
A kind of high-efficiency energy-saving gas-fired boiler central heating system Download PDFInfo
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- CN208703993U CN208703993U CN201821193475.7U CN201821193475U CN208703993U CN 208703993 U CN208703993 U CN 208703993U CN 201821193475 U CN201821193475 U CN 201821193475U CN 208703993 U CN208703993 U CN 208703993U
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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
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- 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]
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Abstract
A kind of high-efficiency energy-saving gas-fired boiler central heating system, it mainly include gas fired-boiler, boiler energy-saving device, electric drive heat pump and boiler smoke heat collector, the high-temperature flue gas that gas fired-boiler generates discharges after the boiler energy-saving device and the recycling of boiler smoke heat collector through successively contacting, boiler smoke heat collector is by being equipped with form closed cycle between the circulation waterway of water circulating pump and the heat collector of electric drive heat pump, heat supply network return water is divided into two-way, return water collaborates the low temperature water inlet for passing to gas fired-boiler after the heating of the radiator of electric drive heat pump with another way return water after boiler energy-saving device heats up all the way, the return water of high-temperature flue gas heating through gas fired-boiler enters heat supply network water system by the high-temperature water outlet mouth of gas fired-boiler.Solve the problems, such as that existing gas fired-boiler central heating system high fume temperature, flue gas waste heat recovery effect are poor, natural gas heat utilization rate is improved to the greatest extent, the possibility for avoiding end flue gas condenser corrosion leakage improves system reliability of operation and stability.
Description
Technical field
The utility model relates to field of energy-saving technology, particularly relate to a kind of high-efficiency energy-saving gas-fired boiler central heating system
System.
Background technique
Currently, domestic gas fired-boiler is mainly used for heat supply heating, compared with coal, petroleum resources, natural gas has calorific value
High, clean and environmental protection advantage.Especially country goes into overdrive to administer haze weather in recent years, explicitly points out and completes scattered coal cleaning in limited time
Change substitution, future there will be more gas fired-boilers to substitute traditional low capacity coal-burning boiler.Therefore, it is comprehensive to improve the gas fired-boiler energy
Utilization efficiency is closed, there is significant economic benefit and environmental benefit.
Energy conservation is arranged in gas fired-boiler rear end as shown in Figure 1, the system is used in existing gas fired-boiler central heating system
The mode that device and flue gas condenser combine recycles residual heat from boiler fume, and then alleviates gas fired-boiler high fume temperature, thermal energy benefit
With insufficient problem.
Gas fired-boiler central heating system mainly by gas fired-boiler, energy-saving appliance, flue gas condenser, heat exchanger and follows in Fig. 1
Ring water pump composition, wherein energy-saving appliance and flue gas condenser are dividing wall type air-water heat exchanger.Natural gas burns in gas fired-boiler
After the high-temperature flue gas heating hot net water of generation, passes sequentially through after energy-saving appliance and flue gas condenser further cool down and discharge.Heat supply network returns
Water passes sequentially through flue gas condenser, energy-saving appliance and boiler and is heated to heat supply network water requirements temperature after being pressurizeed by water circulating pump, heat
Net supplies water to be exchanged heat by the return water of heat exchanger and heat user.
The main component of natural gas is methane (CH4), hydrogen content is high, and the water after Actual combustion in flue gas containing 15 ~ 17% steams
Gas, 54 ~ 57 DEG C of dew point temperature range of corresponding flue gas, vapor carries a large amount of latent heat of vaporization.The smoke evacuation temperature of boiler in Fig. 1
Degree is between 130 ~ 160 DEG C, and after a part of heat in energy-saving appliance recovered flue gas, energy-saving appliance exports about 65 ~ 90 DEG C of smoke temperature,
Higher than dew-point temperature, the vapor in flue gas is not yet coagulated at this time, latent heat of vaporization utilization not yet in effect, in flue gas condenser
The water vapor portion release latent heat of vaporization in flue gas forms condensed water.Though flue gas and heat in Fig. 1 gas fired-boiler central heating system
Net water counterflow heat exchange meets the principle of cascaded utilization of energy, but due to being limited by heat supply network return water temperature, the vapor in flue gas
Only small part coagulates, and the raising of natural gas heat utilization ratio is less, and flue gas condenser exports smoke temperature usually at 45 DEG C or more, 45
Only 40% vapor coagulates under the conditions of DEG C smoke evacuation, and the heat utilization rate of natural gas promotes 5% or so, under the conditions of 48 DEG C of smoke evacuations
Only 30% vapor coagulates, and the heat utilization rate of natural gas promotes 4% or so.Since flue gas condenser is air-water heat exchange
Device, fume side convective heat-transfer coefficient is lower, causes the heat exchange area of flue gas condenser larger, while containing in gas fired-boiler flue gas
The gases such as SO2, NOx, after vapor coagulates, SO2, NOx etc. have corrosivity, the selection to flue gas condenser after being dissolved in water
It improves and requires, cause flue gas condenser at high cost, there is also the risks of corrosion leakage.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of high-efficiency energy-saving gas-fired boiler central heating system, solution
The problem of certainly existing gas fired-boiler central heating system high fume temperature, flue gas waste heat recovery effect difference improves to the greatest extent
Natural gas heat utilization rate, avoids the possibility of end flue gas condenser corrosion leakage, improves system reliability of operation
And stability.
To realize the above-mentioned technical purpose, used technical solution is: a kind of high-efficiency energy-saving gas-fired boiler central heating system
System mainly includes gas fired-boiler, boiler energy-saving device, electric drive heat pump and boiler smoke heat collector, the high temperature that gas fired-boiler generates
Flue gas discharges after the boiler energy-saving device and the recycling of boiler smoke heat collector through successively contacting, and boiler smoke heat collector, which passes through to be equipped with, to follow
Form closed cycle between the circulation waterway of ring water pump and the heat collector of electric drive heat pump, heat supply network return water are divided into two-way, return all the way
Water collaborates to pass to gas fired-boiler after boiler energy-saving device heats up with another way return water after the heating of the radiator of electric drive heat pump
Low temperature water inlet, the return water of the high-temperature flue gas heating through gas fired-boiler enter heat supply network by the high-temperature water outlet mouth of gas fired-boiler and supply water
System.
Boiler smoke heat collector described in the utility model is flue gas heat-exchange unit.
Boiler smoke heat collector described in the utility model includes for the flue gas condensing chamber of flue gas condensing and for following
The recirculated water of the logical heat exchange heating of ring water flow takes hot chamber, and it is the same cavity that flue gas condensing chamber and recirculated water, which take hot chamber,.
Electric drive heat pump described in the utility model mainly by as heat collector evaporator, as the condensation of radiator
Device, compressor and expansion valve composition, evaporator and the interior filling refrigerant of condenser, refrigerant is in sequentially connected evaporator, pressure
Closed cycle circuit is formed in contracting machine, condenser and expansion valve.
Flue gas transmission direction and recirculated water loop direction contrary in boiler smoke heat collector described in the utility model.
The beneficial effects of the utility model are:
The electric drive heat pump energy valid value that the utility model uses is high, and the ability for promoting low grade heat energy is strong, using less
Electric energy input recycle a large amount of fume afterheat, good economy performance, the electric drive heat pump control of use is flexibly, it can be achieved that stepless-adjustment
Section, system operational safety, stabilization good to the adaptability of thermic load variation；The electric drive heat pump of use passes through recycling recirculated water
Heat come recovered flue gas carrying sensible heat and a large amount of latent heat of vaporization, due to recirculated water in electric drive heat pump after heat release temperature compared with
It is low, thus the exhaust gas temperature of boiler and absorption heat pump can be reduced to 20 DEG C hereinafter, 88% or more the vapor that carries in flue gas is solidifying
Form water, natural gas heat utilization rate improves 11% or more.
Boiler smoke heat collector and electric drive heat pump that the utility model uses significantly reduce the moisture content of smoke evacuation flue gas,
" white cigarette " phenomenon of boiler chimney presentation is eliminated, 88% or more vapor can be recycled, condensed water, can after simple process
As the moisturizing of heating network operation, system operation cost is reduced；Boiler smoke heat collector can be shown while recovered flue gas condensed water
The amount for reducing SO2, NOx in smoke evacuation is write, is conducive to improve atmospheric environment.
The electric drive heat pump structure that the utility model uses is compact, it can be achieved that modularized design, space occupied is small, is easy to cloth
It sets, install convenient.
For the boiler smoke heat collector that the utility model uses for direct-contact heat exchanger, every flue gas heat collector is equipped with one
Platform booster pump, recirculated water improve pressure through booster pump, by the nozzle atomization on flue gas heat collector top, then spray flue gas and take heat
The inner space of device.The flue gas of boiler energy-saving device outlet enters from flue gas heat collector lower part, and flue gas is during flowing up
Contact heat-exchanging is carried out with the recirculated water sprayed, so that flue-gas temperature reduces, the vapor in flue gas coagulates disengaged vapor
Change Topography recirculated water, completes the process that recirculated water takes heat from flue gas.Complete counter-current flow between flue gas and recirculated water,
Terminal temperature difference is small, good effect of heat exchange.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the prior art；
Fig. 2 is the structural schematic diagram of the utility model；
Fig. 3 is the flue gas heat collector process flow chart of the utility model；
Fig. 4 is the structure and process principle figure of the electric drive heat pump of the utility model；
In figure: 1, gas fired-boiler, 2, boiler energy-saving device, 3, boiler smoke heat collector, 4, electric drive heat pump, 401, evaporation
Device, 402, condenser, 403, compressor, 404, expansion valve, 5, heat supply network water regulating valve, 6, water circulating pump, 7, circulation waterway, 8, increasing
Press pump, 9, heat exchanger.
Specific embodiment
As shown in Fig. 2, a kind of high-efficiency energy-saving gas-fired boiler central heating system, mainly includes gas fired-boiler 1, boiler energy-saving
Device 2, electric drive heat pump 4 and boiler smoke heat collector 3, boiler energy-saving of the high-temperature flue gas through successively contacting that gas fired-boiler 1 generates
Device 2 and boiler smoke heat collector 3 discharge after recycling, i.e. natural gas high-temperature flue gas heating heat that generation is burnt in gas fired-boiler 1
Net water, flue gas discharge after reducing a large amount of latent heats of vaporization of release by boiler energy-saving device 2 and 3 temperature of boiler smoke heat collector.Boiler
Form closed cycle between the heat collector that flue gas heat collector 3 passes through circulation waterway 7 and electric drive heat pump 4 equipped with water circulating pump 6,
Recirculated water passes through the shape between boiler smoke heat collector 3 and electric drive heat pump 4 of water circulating pump 6 as its low-temperature heat source, recirculated water
At closed cycle, realize that the heat absorption circulation by flue gas in boiler smoke heat collector transfers heat to electric drive heat pump 4
Heat collector.Heat supply network return water is divided into two-way, all the way return water through electric drive heat pump 4 radiator heating after with another way return water through boiler
Interflow passes to the low temperature water inlet of gas fired-boiler 1 after energy-saving appliance 2 heats up, and the return water of the high-temperature flue gas heating through gas fired-boiler 1 is logical
The high-temperature water outlet mouth for crossing gas fired-boiler 1 enters heat supply network water system.Hot meat return pipe on the road Fang Qi for entering electric drive heat pump 4
Heat supply network water regulating valve is added in road, by adjusting the aperture of heat supply network water regulating valve 5, realizes hot net water in electric drive heat pump 4 and pot
Assignment of traffic between furnace energy-saving appliance 2.
As shown in Fig. 2, every boiler smoke heat collector is equipped with a booster pump 8, recirculated water through booster pump improve pressure into
Enter flue gas heat collector, exchange heat with the flue gas of boiler energy-saving device outlet, flue-gas temperature reduces, and the vapor in flue gas occurs solidifying
Knot release latent heat heats recirculated water, completes the process that recirculated water takes heat from flue gas.
Boiler energy-saving device 2 is dividing wall type flue gas heat-exchange unit, and the heat supply network return water of lower temperature enters boiler energy-saving device tube side, is fired
Gas boiler smoke evacuation enters boiler energy-saving device shell side, heats heat supply network return water using gas fired-boiler smoke discharging residual heat, to reach reduction row
Smoke temperature degree recycles the purpose of smoke discharging residual heat.Due to being limited by heat supply network return water temperature and boiler energy-saving device burn into cost, boiler
Energy-saving appliance exit gas temperature is still higher, and usually above the dew-point temperature of flue gas, boiler energy-saving device is only capable of recycling boiler exhaust gas and takes
Most of sensible heat of band.
Boiler smoke heat collector 3 includes for the flue gas condensing chamber of flue gas condensing and for recirculated water circulation heat exchange heating
Recirculated water take hot chamber, it is the same cavity that flue gas condensing chamber and recirculated water, which take hot chamber, is made in boiler smoke heat collector 3 in this way
Flue gas exothermic condensation, condensed water can be used as the moisturizing of circulation waterway after simple process, reduce system operation cost.
Boiler smoke heat collector 3 is direct contact type flue gas heat-exchange unit, and every flue gas heat collector is equipped with a booster pump 8,
Recirculated water improves pressure through booster pump, by the nozzle atomization on flue gas heat collector top, then sprays the inside of flue gas heat collector
Space.The flue gas of boiler energy-saving device outlet enters from flue gas heat collector lower part, and flue gas is during flowing up and under spray
The recirculated water come carries out contact heat-exchanging, so that flue-gas temperature reduces, the vapor in flue gas coagulates the release latent heat of vaporization and adds
Heat recirculated water completes the process that recirculated water takes heat from flue gas.
Flue gas transmission direction and recirculated water loop direction contrary in boiler smoke heat collector, keep flue gas abundant with recirculated water
Heat exchange.
The electric drive heat pump that the utility model uses by recycle sensible heat that the heat of recirculated water carries come recovered flue gas with
The a large amount of latent heat of vaporization, since temperature is lower after heat release in electric drive heat pump for recirculated water, boiler and absorption heat pump
Exhaust gas temperature can be reduced to 20 DEG C hereinafter, 88% or more the vapor carried in flue gas condenses into water, and natural gas heat utilization rate mentions
It is high by 11% or more；
The electric drive heat pump that the utility model uses, compared with absorption heat pump (heat exchanger), energy valid value is high, promotes low product
The ability of position thermal energy is strong, recycles a large amount of fume afterheat, good economy performance using less electric energy input；Electric drive heat pump it is defeated
Entering the energy is electric energy, and arrangement and application are more flexible；The control of electric drive heat pump is flexibly, it can be achieved that step-less adjustment, becomes thermic load
The adaptability of change is good, and system operational safety, stabilization are easy to automation control；More compact on electric drive heat pump structure, land occupation sky
Between it is small, it can be achieved that modularized design, installation.
Electric drive heat pump 4 mainly by as heat collector evaporator 401, as condenser 402, the compressor of radiator
403 and expansion valve 404 form, electric energy is as drive energy, and recirculated water is as low-temperature heat source, in evaporator 401 and condenser 402
Refrigerant is filled, refrigerant is formed in sequentially connected evaporator 401, compressor 403, condenser 402 and expansion valve 404 and closed
Formula circulation loop.The operating pressure of 401 evaporation side of evaporator is very low, utilizes the principle of refrigerant low boiling point, the refrigeration of evaporation side
The process that agent evaporation generates steam absorbs heat from recirculated water, so that making the temperature of recirculated water reduces, realizes from Low Temperature Thermal
Heat is extracted in source；Refrigerant vapour reaches a high temperature high pressure conditions through the compression of compressor 403, the refrigerant vapour of high temperature and pressure into
Enter condenser 402 to coagulate, to heat the hot net water of the other side；The expanded valve 404 of refrigerant that condenser 402 exports is released
Power is bled off pressure, the liquefaction of low-temp low-pressure is returned to, continues back at the heat absorption of evaporator 401, so constantly circulation just completes low product
Continuous transfer of the position thermal energy from recirculated water to hot net water.
The utility model is suitable for carrying out the occasion of regional heating, specific aim using gas fired-boiler using Urban Areas
Solve the problems, such as that gas fired-boiler high fume temperature, flue gas moisture content are high, the natural gas thermal efficiency is low, can be greatly reduced in smoke evacuation
The content of SO2, NOx eliminate " white cigarette " pollution that gas fired-boiler chimney is presented.It can be completed only with four devices entire efficient
Energy conservation reduces occupied area, is easy to arrange, install convenient.
Claims (5)
1. a kind of high-efficiency energy-saving gas-fired boiler central heating system, it is characterised in that: mainly include gas fired-boiler (1), boiler section
Energy device (2), electric drive heat pump (4) and boiler smoke heat collector (3), the high-temperature flue gas that gas fired-boiler (1) generates successively are contacted
Boiler energy-saving device (2) and boiler smoke heat collector (3) recycling after discharge, boiler smoke heat collector (3) pass through be equipped with recirculated water
Form closed cycle between the circulation waterway (7) of (6) and the heat collector of electric drive heat pump (4) is pumped, heat supply network return water is divided into two-way, and one
Road return water collaborates to pass to another way return water after the heating of the radiator of electric drive heat pump (4) after boiler energy-saving device (2) heating
The return water of the low temperature water inlet of gas fired-boiler (1), the high-temperature flue gas heating through gas fired-boiler (1) passes through the height of gas fired-boiler (1)
Warm water outlet enters heat supply network water system.
2. a kind of high-efficiency energy-saving gas-fired boiler central heating system as described in claim 1, it is characterised in that: the boiler
Flue gas heat collector (3) is flue gas heat-exchange unit.
3. a kind of high-efficiency energy-saving gas-fired boiler central heating system as claimed in claim 1 or 2, it is characterised in that: described
Boiler smoke heat collector (3) includes the flue gas condensing chamber for flue gas condensing and the recirculated water for recirculated water circulation heat exchange heating
Hot chamber is taken, it is the same cavity that flue gas condensing chamber and recirculated water, which take hot chamber,.
4. a kind of high-efficiency energy-saving gas-fired boiler central heating system as described in claim 1, it is characterised in that: the electricity drives
Dynamic heat pump (4) mainly by the evaporator (401) as heat collector, the condenser (402) as radiator, compressor (403) and
Expansion valve (404) composition, evaporator (401) and the interior filling refrigerant of condenser (402), refrigerant is in sequentially connected evaporator
(401), closed cycle circuit is formed in compressor (403), condenser (402) and expansion valve (404).
5. a kind of high-efficiency energy-saving gas-fired boiler central heating system as described in claim 1, it is characterised in that: the boiler
Flue gas transmission direction and recirculated water loop direction contrary in flue gas heat collector (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821193475.7U CN208703993U (en) | 2018-07-26 | 2018-07-26 | A kind of high-efficiency energy-saving gas-fired boiler central heating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821193475.7U CN208703993U (en) | 2018-07-26 | 2018-07-26 | A kind of high-efficiency energy-saving gas-fired boiler central heating system |
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| CN208703993U true CN208703993U (en) | 2019-04-05 |
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| CN201821193475.7U Active CN208703993U (en) | 2018-07-26 | 2018-07-26 | A kind of high-efficiency energy-saving gas-fired boiler central heating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186101A (en) * | 2019-04-25 | 2019-08-30 | 中能服能源科技股份有限公司 | It is a kind of with flue gas disappear white effect electric heating pump waste heat recycle heating system |
| CN111102592A (en) * | 2019-12-23 | 2020-05-05 | 北京建筑大学 | Direct-expansion heat pump type anti-corrosion flue gas waste heat recovery system |
| CN114278959A (en) * | 2021-12-28 | 2022-04-05 | 天津华赛尔传热设备有限公司 | Waste heat recovery system for gas boiler and gas boiler |
-
2018
- 2018-07-26 CN CN201821193475.7U patent/CN208703993U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186101A (en) * | 2019-04-25 | 2019-08-30 | 中能服能源科技股份有限公司 | It is a kind of with flue gas disappear white effect electric heating pump waste heat recycle heating system |
| CN111102592A (en) * | 2019-12-23 | 2020-05-05 | 北京建筑大学 | Direct-expansion heat pump type anti-corrosion flue gas waste heat recovery system |
| CN114278959A (en) * | 2021-12-28 | 2022-04-05 | 天津华赛尔传热设备有限公司 | Waste heat recovery system for gas boiler and gas boiler |
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| CP01 | Change in the name or title of a patent holder |
Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |