WO2022206015A1 - Flue gas waste heat and condensate water recovery system for gas-fired hot water boiler - Google Patents
Flue gas waste heat and condensate water recovery system for gas-fired hot water boiler Download PDFInfo
- Publication number
- WO2022206015A1 WO2022206015A1 PCT/CN2021/136959 CN2021136959W WO2022206015A1 WO 2022206015 A1 WO2022206015 A1 WO 2022206015A1 CN 2021136959 W CN2021136959 W CN 2021136959W WO 2022206015 A1 WO2022206015 A1 WO 2022206015A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- flue gas
- heat
- pipe
- recovery system
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 239000003546 flue gas Substances 0.000 title claims abstract description 66
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000002918 waste heat Substances 0.000 title claims abstract description 19
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000009833 condensation Methods 0.000 claims description 15
- 230000005494 condensation Effects 0.000 claims description 14
- 239000003595 mist Substances 0.000 claims description 10
- 239000008236 heating water Substances 0.000 claims description 9
- 239000013589 supplement Substances 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- PZZOEXPDTYIBPI-UHFFFAOYSA-N 2-[[2-(4-hydroxyphenyl)ethylamino]methyl]-3,4-dihydro-2H-naphthalen-1-one Chemical compound C1=CC(O)=CC=C1CCNCC1C(=O)C2=CC=CC=C2CC1 PZZOEXPDTYIBPI-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/0036—Dispositions against condensation of combustion products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/0042—Cleaning arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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]
-
- 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
Definitions
- the invention relates to the technical field of boiler equipment, in particular to a flue gas waste heat and condensed water recovery system of a gas-fired hot water boiler.
- the present invention provides a flue gas waste heat and condensation recovery system of a gas-fired hot water boiler, and the specific technical scheme is as follows.
- a flue gas waste heat and condensation recovery system for a gas-fired hot water boiler comprising a screw heat pump unit, a heat exchanger, a variable frequency fan, a baffle plate demister and a water replenishing tank;
- the screw heat pump unit is connected to a heating pipeline, and the screw heat pump unit It is also connected with the heat exchange pipeline of the heat exchanger;
- the heat exchanger is arranged in the flue gas channel, the flue gas channel is provided with a variable frequency fan at the outlet, and the bypass flue is also arranged at the flue gas inlet of the flue gas channel;
- the baffle plate mist eliminator is arranged in the flue gas passage, and the bottom of the flue gas passage is also provided with a condensing water pipe, which is connected with the water supplement tank; the supplement water tank is provided with a dosing device.
- the screw heat pump unit is respectively connected with the heating water inlet pipeline and the heating return water pipeline, and the heating water inlet pipeline and the heating return water pipeline are connected to the heating pipe network.
- the heat exchange pipeline includes a heat exchange water inlet pipe and a heat exchange water return pipe, the heat exchange water inlet pipe and the heat exchange water return pipe are respectively connected to the heat exchanger, and the heat exchange water inlet pipe and the heat exchange water return pipe are also connected to the screw heat pump unit.
- the deflector mist eliminator is arranged downstream of the heat exchanger in the flue gas flow direction.
- the dosing device adjusts the pH value of the water in the replenishment tank to 8-10.
- a soundproof cover is set on the exterior of the screw heat pump unit.
- the replenishment tank is connected to a replenishment pump, and the replenishment pump supplies water to the replenishment system of the heating pipe network.
- an air volume sensor is arranged in the flue gas channel, and the air volume sensor controls the variable frequency fan in linkage.
- the beneficial effects of the flue gas waste heat and condensation recovery system of the gas-fired hot water boiler include: setting a baffle plate mist eliminator in the flue gas channel to separate out the condensed water in the flue gas, and the variable frequency fan controls the flue gas channel.
- the flow rate of the flue gas in the water supply tank is equipped with a dosing device so that the pH value in the water supply tank can be adjusted in time.
- the water in the water supply tank is used for the water supply system of the pipe network.
- the metal pipeline can also be passivated.
- a soundproof cover is set outside the screw heat pump unit to avoid noise pollution of the screw heat pump unit; the system also has the advantages of simple structure, convenient adjustment, cleanliness and environmental protection.
- Fig. 1 is a schematic diagram of the structure of a flue gas waste heat and condensation recovery system of a gas-fired hot water boiler;
- Fig. 2 is the cross-sectional structure schematic diagram of the supplementary water tank
- a flue gas waste heat and condensation recovery system for a gas-fired hot water boiler comprising a screw heat pump unit 1, a heat exchanger 2, a variable frequency fan 3, a baffle demister 4 and a water replenishing tank 5, and the screw heat pump unit 1 is used for absorbing smoke
- the heat energy in the gas is used for heat exchange.
- the heat exchanger further absorbs the heat energy of the flue gas in the flue gas channel. Air circulation.
- the screw heat pump unit 1 is connected with the heating pipeline, which can provide a heat source for the heating system, and the screw heat pump unit 1 is also connected with the heat exchange pipeline of the heat exchanger to further realize the heat exchange of flue gas, which is used for the heating pipeline network.
- the heat exchanger 2 is arranged in the flue gas channel, and a variable frequency fan 3 is arranged at the outlet of the flue gas channel to control the air volume in the flue gas channel.
- the channel 13 can be used in the maintenance of the flue gas channel for emergency smoke exhaust.
- the baffle plate mist eliminator 4 is arranged in the flue gas channel to capture the mist particles and slurry droplets entrained in the flue gas, which has a better demisting effect.
- the condensed water in the channel goes down into the condensed water pipe, and the condensed water pipe 12 is connected to the water replenishment tank.
- the condensed water pipe 12 can also be provided with a filter, and the filter is provided with a slag discharge valve.
- the water replenishment tank 6 is provided with a dosing device, and a pH monitor is arranged in the water replenishment tank 6. According to the monitoring data of the pH monitor, the dosing device works to control the pH value of the water in the replenishment tank 6.
- the screw heat pump unit 1 is respectively connected with the heating water inlet pipeline 8 and the heating return water pipeline 9, and the heating water inlet pipeline 8 and the heating return water pipeline 9 are connected to the heating pipe network; the cold water in the heating return water pipeline 9 is heated by the screw heat pump unit, and the heat The water enters the heating water inlet pipe 10 .
- the heat exchange pipeline includes a heat exchange water inlet pipe 10 and a heat exchange return water pipe 11.
- the heat exchange water inlet pipe 10 and the heat exchange return water pipe 11 are respectively connected to the heat exchanger 2.
- the heat exchange water inlet pipe 10 and the heat exchange return water pipe 11 are also connected with the screw heat pump unit. 1 is connected, and the heat in the flue gas is reused to ensure that the heat of the exhaust flue gas is lower than 20 °C.
- the baffle plate mist eliminator 4 is arranged downstream of the heat exchanger along the flow direction of the flue gas, the flue gas channel is arranged vertically, and the baffle plate mist eliminator 4 is arranged above the heat exchanger 2, so that the flue gas first passes through the heat exchange Then pass the defogger to ensure the effect of defogging.
- the dosing device 7 adjusts the pH value of the water in the replenishment tank 6 to 8-10.
- the condensed water in the make-up tank is used to make up water for the boiler and the pipe network, and can adjust the PH value of the hot water in the boiler and the pipe network, and delay the corrosion of the pipeline and the scaling of the boiler.
- the outside of the screw heat pump unit 1 is provided with a soundproof cover, so that the influence of noise can be reduced.
- the make-up water tank 6 is connected to the make-up pump 6, and the make-up pump 6 supplies water to the make-up water system of the heating pipe network.
- An air volume sensor is arranged in the flue gas channel, and the air volume sensor is linked to control the variable frequency fan 3, and further intelligent control of the system can be realized.
- the variable frequency fan uses a variable frequency negative pressure fan.
- the system can separate the condensed water in the flue gas by setting the baffle plate mist eliminator in the flue gas channel, the variable frequency fan controls the flow rate of the flue gas in the flue gas channel, and the water supply tank is provided with a dosing device so that it can be timely Adjust the pH value in the water supply tank, and the water in the water supply tank is used for the water supply system of the pipe network.
- the metal pipeline can be passivated to prevent scaling; the external soundproof cover of the screw heat pump unit can avoid the screw heat pump unit of noise pollution.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
A flue gas waste heat and condensate water recovery system for a gas-fired hot water boiler, comprising: a screw heat pump unit (1), a heat exchanger (2), a variable frequency fan (3), a baffle plate demister (4), and a water replenishment tank (5). The screw heat pump unit (1) is connected to heating pipes (8, 9) and is also connected to heat exchange pipes (10, 11) of the heat exchanger (2); the heat exchanger (2) and the baffle plate demister (4) are disposed in a flue gas passage; the variable frequency fan (3) is disposed at the exit of the flue gas passage, and a bypass flue (13) is provided at the entrance of the flue gas passage; the bottom of the flue gas passage is provided with a condensate water pipe (12) connected to the water replenishment tank (5); the water replenishment tank (5) is provided with a feeding device (7); and a replenishment water pump (6) is connected to the replenishment water tank (5) and a heating pipe network water replenishment system. The system can recycle waste heat and reduce the corrosion of the flue by the condensate water in the flue gas. The condensate water can also be used for water replenishment of the heating pipe network. The system has a simple structure, is convenient to adjust, and can protect the environment.
Description
本发明涉及锅炉设备技术领域，尤其是一种燃气热水锅炉的烟气余热以及冷凝水回收系统。 The invention relates to the technical field of boiler equipment, in particular to a flue gas waste heat and condensed water recovery system of a gas-fired hot water boiler.
目前居民小区很多选用燃气（清洁能源）锅炉进行供暖，烟囱多选用钢筋混凝土结构，在燃气燃烧（CH
4+2O
2=CO
2+2H
2O）的过程产生大量的水蒸气（1立方天然气燃烧产生1.55kg水蒸气），水蒸气随烟气经过烟道排放时冷凝成水，因冷凝水具有弱酸性长期腐蚀金属烟道或钢筋混凝土烟道，造成烟道漏水、渗水，同时水蒸气冷凝会释放大量的热能。为了避免污染需要将锅炉排放的烟气降温至20度以下，同时还要将烟气中90%以上的水蒸气冷凝回收加药调整PH值补充管网用水，还可将烟气中的低品热能回收用于居民供热。从而可以解决烟道腐蚀的问题还能将回收的热能及冷凝水用于供暖和管网补水，具有较高经济价值。
At present, many residential areas use gas (clean energy) boilers for heating, and chimneys are mostly made of reinforced concrete structures. During the process of gas combustion (CH 4 +2O 2 =CO 2 +2H 2 O), a large amount of water vapor (1 cubic meter of natural gas combustion) is generated. 1.55kg water vapor is generated), and the water vapor condenses into water when it is discharged through the flue with the flue gas. Because the condensed water has weak acidity, it corrodes the metal flue or reinforced concrete flue for a long time, causing water leakage and water seepage in the flue. Release a lot of heat energy. In order to avoid pollution, it is necessary to cool the flue gas discharged from the boiler to below 20 degrees, and at the same time, more than 90% of the water vapor in the flue gas should be condensed and recovered, and the PH value should be adjusted to supplement the water in the pipe network. Heat recovery is used for residential heating. Therefore, the problem of flue corrosion can be solved, and the recovered heat energy and condensed water can be used for heating and water supply of the pipe network, which has high economic value.
为了降低烟气中的冷凝水对烟道的腐蚀，并回收利用余热，本发明提供了一种燃气热水锅炉的烟气余热和冷凝回收系统，具体技术方案如下。In order to reduce the corrosion of the flue by the condensed water in the flue gas, and to recycle the waste heat, the present invention provides a flue gas waste heat and condensation recovery system of a gas-fired hot water boiler, and the specific technical scheme is as follows.
一种燃气热水锅炉的烟气余热和冷凝回收系统，包括螺杆热泵机组、换热器、变频风机、折流板除雾器和补水箱；所述螺杆热泵机组与供暖管道相连，螺杆热泵机组还与换热器的换热管道相连；所述换热器设置在烟气通道内，烟气通道在出口处设置有变频风机，烟气通道的烟气入口处还设置有旁路烟道；所述折流板除雾器设置在烟气通道内，烟气通道的底部还设置有冷凝水管，冷凝水管和补水箱相连；所述补水箱设置有加药装置。A flue gas waste heat and condensation recovery system for a gas-fired hot water boiler, comprising a screw heat pump unit, a heat exchanger, a variable frequency fan, a baffle plate demister and a water replenishing tank; the screw heat pump unit is connected to a heating pipeline, and the screw heat pump unit It is also connected with the heat exchange pipeline of the heat exchanger; the heat exchanger is arranged in the flue gas channel, the flue gas channel is provided with a variable frequency fan at the outlet, and the bypass flue is also arranged at the flue gas inlet of the flue gas channel; The baffle plate mist eliminator is arranged in the flue gas passage, and the bottom of the flue gas passage is also provided with a condensing water pipe, which is connected with the water supplement tank; the supplement water tank is provided with a dosing device.
优选的是，螺杆热泵机组分别与供暖进水管道和供暖回水管道相连，供暖进水管道和供暖回水管道连接供暖管网。Preferably, the screw heat pump unit is respectively connected with the heating water inlet pipeline and the heating return water pipeline, and the heating water inlet pipeline and the heating return water pipeline are connected to the heating pipe network.
还优选的是，换热管道包括换热进水管和换热回水管，换热进水管和换热回水管分别连接换热器，换热进水管和换热回水管还与螺杆热泵机组相连。It is also preferred that the heat exchange pipeline includes a heat exchange water inlet pipe and a heat exchange water return pipe, the heat exchange water inlet pipe and the heat exchange water return pipe are respectively connected to the heat exchanger, and the heat exchange water inlet pipe and the heat exchange water return pipe are also connected to the screw heat pump unit.
还优选的是，折流板除雾器沿烟气流动方向设置在换热器的下游。It is also preferred that the deflector mist eliminator is arranged downstream of the heat exchanger in the flue gas flow direction.
进一步优选的是，加药装置调整补水箱内水的PH值为8-10。Further preferably, the dosing device adjusts the pH value of the water in the replenishment tank to 8-10.
进一步优选的是，螺杆热泵机组的外部套设有隔音罩。It is further preferred that a soundproof cover is set on the exterior of the screw heat pump unit.
进一步优选的是，补水箱连接补水泵，所述补水泵向供暖管网的补水系统供水。Further preferably, the replenishment tank is connected to a replenishment pump, and the replenishment pump supplies water to the replenishment system of the heating pipe network.
进一步优选的是，烟气通道内设置有风量传感器，风量传感器联动控制变频风机。Further preferably, an air volume sensor is arranged in the flue gas channel, and the air volume sensor controls the variable frequency fan in linkage.
本发明提供的一种燃气热水锅炉的烟气余热和冷凝回收系统有益效果包括：在烟气通道内设置折流板除雾器可以将烟气中的冷凝水析出，变频风机控制烟气通道内的烟气流动的流量，补水箱设置有加药装置从而可以及时调整补水箱内的PH值，补水箱内的水用于管网的补水系统，调整PH值后还可以钝化金属管路防止结垢；螺杆热泵机组的外部套设隔音罩可以避免螺杆热泵机组的噪音污染；该系统还具有结构简单，调节方便，清洁环保等优点。The beneficial effects of the flue gas waste heat and condensation recovery system of the gas-fired hot water boiler provided by the present invention include: setting a baffle plate mist eliminator in the flue gas channel to separate out the condensed water in the flue gas, and the variable frequency fan controls the flue gas channel. The flow rate of the flue gas in the water supply tank is equipped with a dosing device so that the pH value in the water supply tank can be adjusted in time. The water in the water supply tank is used for the water supply system of the pipe network. After adjusting the pH value, the metal pipeline can also be passivated. To prevent scaling; a soundproof cover is set outside the screw heat pump unit to avoid noise pollution of the screw heat pump unit; the system also has the advantages of simple structure, convenient adjustment, cleanliness and environmental protection.
图1是燃气热水锅炉的烟气余热和冷凝回收系统的结构示意图；Fig. 1 is a schematic diagram of the structure of a flue gas waste heat and condensation recovery system of a gas-fired hot water boiler;
图2是补水箱的剖面结构示意图；Fig. 2 is the cross-sectional structure schematic diagram of the supplementary water tank;
图中：1-螺杆热泵机组，2-换热器，3-变频风机，4-折流板除雾器，5-补水箱，6-补水泵，7-加药装置，8-供暖进水管道，9-供暖回水管道，10-换热进水管，11-换热回水管，12-冷凝水管，13-旁路烟道，14-烟气入口。In the picture: 1- Screw heat pump unit, 2- Heat exchanger, 3- Frequency conversion fan, 4- Baffle defogger, 5- Make-up water tank, 6- Make-up water pump, 7- Dosing device, 8- Heating water inlet Pipes, 9-heating return pipe, 10-heat exchange water inlet pipe, 11-heat exchange return pipe, 12-condensation water pipe, 13-bypass flue, 14-flue gas inlet.
结合图1至图2所示，对本发明提供的一种燃气热水锅炉的烟气余热和冷凝回收系统具体实施方式进行说明。With reference to FIGS. 1 to 2 , specific implementations of a flue gas waste heat and condensation recovery system of a gas-fired hot water boiler provided by the present invention will be described.
一种燃气热水锅炉的烟气余热和冷凝回收系统，包括螺杆热泵机组1、换热器2、变频风机3、折流板除雾器4和补水箱5，螺杆热泵机组1用于吸收烟气中的热能，并用于换热，换热器在烟气通道内进一步吸收烟气热能，变频风机和折流板除雾器配合用于去除烟气中的水分，并保证烟气通道内的空气流通。螺杆热泵机组1与供暖管道相连，可以为供暖系统提供热源，螺杆热泵机组1还与换热器的换热管道相连，进一步实现烟气换热，用于供暖管网。换热器2设置在烟气通道内，烟气通道在出口处设置有变频风机3，控制烟气通道内的风量，烟气通道的烟气入口处还设置有旁路烟道，旁路烟道13可以在烟气通道维护保养时使用，用于应急排烟。折流板除雾器4设置在烟气通道内，将烟气夹带的雾粒、浆液滴捕集下来，具有更好的除雾效果，烟气通道的底部还设置有冷凝水管12，烟气通道内的冷凝水向下进入冷凝水管，冷凝水管12和补水箱相连，冷凝水管12上还可以设置过滤器，过滤器设置有排渣阀。补水箱6设置有加药装置，在补水箱6内设置有PH监测仪，根据PH监测仪的监测数据，加药装置工作，控制补水箱6内水的PH值。A flue gas waste heat and condensation recovery system for a gas-fired hot water boiler, comprising a screw heat pump unit 1, a heat exchanger 2, a variable frequency fan 3, a baffle demister 4 and a water replenishing tank 5, and the screw heat pump unit 1 is used for absorbing smoke The heat energy in the gas is used for heat exchange. The heat exchanger further absorbs the heat energy of the flue gas in the flue gas channel. Air circulation. The screw heat pump unit 1 is connected with the heating pipeline, which can provide a heat source for the heating system, and the screw heat pump unit 1 is also connected with the heat exchange pipeline of the heat exchanger to further realize the heat exchange of flue gas, which is used for the heating pipeline network. The heat exchanger 2 is arranged in the flue gas channel, and a variable frequency fan 3 is arranged at the outlet of the flue gas channel to control the air volume in the flue gas channel. The channel 13 can be used in the maintenance of the flue gas channel for emergency smoke exhaust. The baffle plate mist eliminator 4 is arranged in the flue gas channel to capture the mist particles and slurry droplets entrained in the flue gas, which has a better demisting effect. The condensed water in the channel goes down into the condensed water pipe, and the condensed water pipe 12 is connected to the water replenishment tank. The condensed water pipe 12 can also be provided with a filter, and the filter is provided with a slag discharge valve. The water replenishment tank 6 is provided with a dosing device, and a pH monitor is arranged in the water replenishment tank 6. According to the monitoring data of the pH monitor, the dosing device works to control the pH value of the water in the replenishment tank 6.
螺杆热泵机组1分别与供暖进水管道8和供暖回水管道9相连，供暖进水管道8和供暖回水管道9连接供暖管网；供暖回水管道9内的冷水经过螺杆热泵机组加热，热水进入供暖进水管道10。The screw heat pump unit 1 is respectively connected with the heating water inlet pipeline 8 and the heating return water pipeline 9, and the heating water inlet pipeline 8 and the heating return water pipeline 9 are connected to the heating pipe network; the cold water in the heating return water pipeline 9 is heated by the screw heat pump unit, and the heat The water enters the heating water inlet pipe 10 .
换热管道包括换热进水管10和换热回水管11，换热进水管10和换热回水管11分别连接换热器2，换热进水管10和换热回水管11还与螺杆热泵机组1相连，重复利用烟气中的热量，保证排出的烟气热量低于20℃。The heat exchange pipeline includes a heat exchange water inlet pipe 10 and a heat exchange return water pipe 11. The heat exchange water inlet pipe 10 and the heat exchange return water pipe 11 are respectively connected to the heat exchanger 2. The heat exchange water inlet pipe 10 and the heat exchange return water pipe 11 are also connected with the screw heat pump unit. 1 is connected, and the heat in the flue gas is reused to ensure that the heat of the exhaust flue gas is lower than 20 °C.
折流板除雾器4沿烟气流动方向设置在换热器的下游，烟气通道竖直设置，折流板除雾器4设置在换热器2的上方，使烟气先经过换热再通过除雾器，保证除雾的效果。The baffle plate mist eliminator 4 is arranged downstream of the heat exchanger along the flow direction of the flue gas, the flue gas channel is arranged vertically, and the baffle plate mist eliminator 4 is arranged above the heat exchanger 2, so that the flue gas first passes through the heat exchange Then pass the defogger to ensure the effect of defogging.
加药装置7调整补水箱6内水的PH值为8-10。补水箱内的冷凝水用于锅炉和管网补水并能调整锅炉及管网热水的PH值，延缓管路锈蚀及锅炉结垢。The dosing device 7 adjusts the pH value of the water in the replenishment tank 6 to 8-10. The condensed water in the make-up tank is used to make up water for the boiler and the pipe network, and can adjust the PH value of the hot water in the boiler and the pipe network, and delay the corrosion of the pipeline and the scaling of the boiler.
螺杆热泵机组1的外部套设有隔音罩，从而可以降低噪音的影响。The outside of the screw heat pump unit 1 is provided with a soundproof cover, so that the influence of noise can be reduced.
补水箱6连接补水泵6，补水泵6向供暖管网的补水系统供水。烟气通道内设置有风量传感器，风量传感器联动控制变频风机3，进一步的还可以实现对该系统的智能控制，变频风机使用变频负压风机。The make-up water tank 6 is connected to the make-up pump 6, and the make-up pump 6 supplies water to the make-up water system of the heating pipe network. An air volume sensor is arranged in the flue gas channel, and the air volume sensor is linked to control the variable frequency fan 3, and further intelligent control of the system can be realized. The variable frequency fan uses a variable frequency negative pressure fan.
该系统通过在烟气通道内设置折流板除雾器，可以将烟气中的冷凝水析出，变频风机控制烟气通道内的烟气流动的流量，补水箱设置有加药装置从而可以及时调整补水箱内的PH值，补水箱内的水用于管网的补水系统，调整PH值后还可以钝化金属管路防止结垢；螺杆热泵机组的外部套设隔音罩可以避免螺杆热泵机组的噪音污染。The system can separate the condensed water in the flue gas by setting the baffle plate mist eliminator in the flue gas channel, the variable frequency fan controls the flow rate of the flue gas in the flue gas channel, and the water supply tank is provided with a dosing device so that it can be timely Adjust the pH value in the water supply tank, and the water in the water supply tank is used for the water supply system of the pipe network. After adjusting the pH value, the metal pipeline can be passivated to prevent scaling; the external soundproof cover of the screw heat pump unit can avoid the screw heat pump unit of noise pollution.
当然，上述说明并非是对本发明的限制，本发明也并不仅限于上述举例，本技术领域的技术人员在本发明的实质范围内所做出的变化、改型、添加或替换，也应属于本发明的保护范围。Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention should also belong to the present invention. the scope of protection of the invention.
Claims (8)
- 一种燃气热水锅炉的烟气余热和冷凝回收系统，其特征在于，包括螺杆热泵机组、换热器、变频风机、折流板除雾器和补水箱；所述螺杆热泵机组与供暖管道相连，螺杆热泵机组还与换热器的换热管道相连；所述换热器设置在烟气通道内，烟气通道在出口处设置有变频风机，烟气通道的烟气入口处还设置有旁路烟道；所述折流板除雾器设置在烟气通道内，烟气通道的底部还设置有冷凝水管，冷凝水管和补水箱相连；所述补水箱设置有加药装置。A flue gas waste heat and condensation recovery system for a gas-fired hot water boiler, characterized in that it includes a screw heat pump unit, a heat exchanger, a variable frequency fan, a defogger with a baffle plate and a water replenishing tank; the screw heat pump unit is connected to a heating pipeline , the screw heat pump unit is also connected with the heat exchange pipe of the heat exchanger; the heat exchanger is arranged in the flue gas channel, the flue gas channel is provided with a variable frequency fan at the outlet, and the flue gas inlet of the flue gas channel is also provided with a side-by-side Road flue; the baffle plate mist eliminator is arranged in the flue gas channel, and the bottom of the flue gas channel is also provided with a condensing water pipe, which is connected with the water replenishment tank; the water replenishing tank is provided with a dosing device.
- 根据权利要求1所述的一种燃气热水锅炉的烟气余热和冷凝回收系统，其特征在于，所述螺杆热泵机组分别与供暖进水管道和供暖回水管道相连，供暖进水管道和供暖回水管道连接供暖管网。The flue gas waste heat and condensation recovery system of a gas-fired hot water boiler according to claim 1, wherein the screw heat pump unit is respectively connected with a heating water inlet pipe and a heating return water pipe, and the heating water inlet pipe and the heating water pipe are respectively connected. The return pipe is connected to the heating network.
- 根据权利要求1所述的一种燃气热水锅炉的烟气余热和冷凝回收系统，其特征在于，所述换热管道包括换热进水管和换热回水管，换热进水管和换热回水管分别连接换热器，换热进水管和换热回水管还与螺杆热泵机组相连。The flue gas waste heat and condensation recovery system of a gas-fired hot water boiler according to claim 1, wherein the heat exchange pipe comprises a heat exchange water inlet pipe and a heat exchange return water pipe, and the heat exchange water inlet pipe and the heat exchange return pipe The water pipes are respectively connected with the heat exchangers, and the heat exchange water inlet pipes and the heat exchange return water pipes are also connected with the screw heat pump unit.
- 根据权利要求1所述的一种燃气热水锅炉的烟气余热和冷凝回收系统，其特征在于，所述折流板除雾器沿烟气流动方向设置在换热器的下游。The flue gas waste heat and condensation recovery system of a gas-fired hot water boiler according to claim 1, wherein the baffle plate mist eliminator is arranged downstream of the heat exchanger along the flue gas flow direction.
- 根据权利要求1所述的一种燃气热水锅炉的烟气余热和冷凝回收系统，其特征在于，所述加药装置调整补水箱内水的PH值为8-10。The flue gas waste heat and condensation recovery system of a gas-fired hot water boiler according to claim 1, wherein the dosing device adjusts the pH value of the water in the replenishment tank to 8-10.
- 根据权利要求1所述的一种燃气热水锅炉的烟气余热和冷凝回收系统，其特征在于，所述螺杆热泵机组的外部套设有隔音罩。The flue gas waste heat and condensation recovery system of a gas-fired hot water boiler according to claim 1, wherein the screw heat pump unit is sheathed with a soundproof cover.
- 根据权利要求1所述的一种燃气热水锅炉的烟气余热和冷凝回收系统，其特征在于，所述补水箱连接补水泵，所述补水泵向供暖管网的补水系统供水。The flue gas waste heat and condensation recovery system of a gas-fired hot water boiler according to claim 1, wherein the water supplement tank is connected to a supplement water pump, and the supplement water pump supplies water to a water supplement system of a heating pipe network.
- 根据权利要求1所述的一种燃气热水锅炉的烟气余热和冷凝回收系统，其特征在于，所述烟气通道内设置有风量传感器，风量传感器联动控制变频风机。The flue gas waste heat and condensation recovery system of a gas-fired hot water boiler according to claim 1, wherein an air volume sensor is arranged in the flue gas channel, and the air volume sensor is linked to control the variable frequency fan.
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