CN103017140B - Biomass electric power plant cigarette wind waste heat recovery plant - Google Patents
Biomass electric power plant cigarette wind waste heat recovery plant Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及一种热回收装置，尤其涉及一种生物质电厂烟风废热回收装置。The invention relates to a heat recovery device, in particular to a waste heat recovery device for flue gas from a biomass power plant.
背景技术Background technique
生物质发电厂的烟风热通过烟囱排入大气形成巨大的热能损失，是生物质发电厂能源使用效率低下的主要原因，不仅造成能量和水或电的浪费，同时也严重地污染了大气。生物质发电厂与火力发电厂一个重要区别就在于生物质发电厂的燃烧废气中含硫量极低，冷凝后也不会形成硫酸，腐蚀设备。所以生物质电厂对其所排放的烟风没有一定的温度要求，完全可以将烟风中的热量加以回收利用。The flue wind heat of the biomass power plant is discharged into the atmosphere through the chimney to form a huge loss of heat energy, which is the main reason for the low efficiency of energy use in the biomass power plant. It not only causes waste of energy and water or electricity, but also seriously pollutes the atmosphere. An important difference between biomass power plants and thermal power plants is that the sulfur content in the combustion exhaust gas of biomass power plants is extremely low, and sulfuric acid will not be formed after condensation, which will corrode equipment. Therefore, the biomass power plant does not have certain temperature requirements for the flue gas it emits, and the heat in the flue gas can be completely recycled.
发明内容Contents of the invention
本发明针对现有技术中烟风废热难以回收与利用的问题，提供了一种采用热泵技术回收电厂烟风余热的生物质电厂烟风废热回收装置。Aiming at the problem that the flue gas waste heat in the prior art is difficult to recover and utilize, the invention provides a biomass power plant flue gas waste heat recovery device which adopts heat pump technology to recover the flue gas waste heat of the power plant.
为了解决上述技术问题，本发明通过下述技术方案得以解决：In order to solve the above technical problems, the present invention is solved through the following technical solutions:
一种生物质电厂烟风废热回收装置，包括蒸汽管路、冷却水循环管路、除盐水管路，还包括烟气换热管路，所述的烟气换热管路设有烟气换热器，经过吸收热泵热吸收后，回到烟气换热器。所述的烟气换热管路中还设有循环泵。所述烟气换热管路经过烟气换热器进行吸热，再连接到吸收热泵进行放热，而后通过循环泵的作用，烟气换热管路循环回收烟气中的废热，并提供给吸收热泵。A flue gas waste heat recovery device of a biomass power plant, including a steam pipeline, a cooling water circulation pipeline, a demineralized water pipeline, and a flue gas heat exchange pipeline, and the flue gas heat exchange pipeline is provided with a flue gas heat exchange pipeline After being absorbed by the absorption heat pump, it returns to the flue gas heat exchanger. A circulation pump is also provided in the flue gas heat exchange pipeline. The flue gas heat exchange pipeline absorbs heat through the flue gas heat exchanger, and then connects to the absorption heat pump for heat release, and then through the function of the circulation pump, the flue gas heat exchange pipeline circulates and recovers the waste heat in the flue gas, and provides Give absorption heat pump.
作为优选，所述的除盐水管路包括除盐水箱和炉渣换热器，经过水水换热器后通过除盐水回水管路回到除盐水箱。所述的除盐水回水管路上设有除盐水回水管路控制阀，水水换热器与除盐水回水管路控制阀之间设有除氧管路，除氧管路与除氧器连接。所述的除氧器通过给水泵通入锅炉给水。当除盐水回水管路控制阀关闭时，除盐水管路中的水通过水水换热器后回流至除盐水箱；当除盐水回水管路控制阀打开时，除盐水管路中的水通过水水换热器后通过除氧管路进入除氧器。Preferably, the desalinated water pipeline includes a desalted water tank and a slag heat exchanger, and returns to the desalted water tank through the desalted water return pipeline after passing through the water-water heat exchanger. The desalinated water return pipeline is provided with a desalted water return pipeline control valve, and a deoxygenation pipeline is provided between the water-water heat exchanger and the desalted water return pipeline control valve, and the deoxygenation pipeline is connected to the deaerator. The deaerator is fed into boiler feed water through a feed water pump. When the control valve of the desalinated water return line is closed, the water in the desalinated water line passes through the water-to-water heat exchanger and then returns to the desalinated water tank; when the control valve of the desalinated water return line is opened, the water in the desalinated water line passes through After the water-to-water heat exchanger, it enters the deaerator through the deaeration pipeline.
作为优选，所述的蒸汽管路连接汽机与凝汽器；冷却水循环管路从冷却循环水池开始，经过凝汽器、吸收热泵以及冷却塔后回到冷却循环水池。所述的冷却水循环管路中还设有冷却循环泵。Preferably, the steam pipeline connects the steam turbine and the condenser; the cooling water circulation pipeline starts from the cooling circulation pool, passes through the condenser, the absorption heat pump and the cooling tower, and then returns to the cooling circulation pool. A cooling circulation pump is also provided in the cooling water circulation pipeline.
作为优选，所述的生物质电厂烟风废热回收装置还包括内循环管路，内循环管路经过吸收热泵以及水水换热器。所述的内循环管路上还设有供热循环泵。内循环管路通过冷却水循环管路上的吸收热泵进行热交换获取热能，然后通过水水换热器将获得的热能以热交换的方式传递给除盐水管路。Preferably, the waste heat recovery device for flue gas from a biomass power plant further includes an internal circulation pipeline passing through an absorption heat pump and a water-to-water heat exchanger. A heat supply circulation pump is also provided on the internal circulation pipeline. The internal circulation pipeline obtains heat energy through heat exchange through the absorption heat pump on the cooling water circulation pipeline, and then transfers the obtained heat energy to the desalinated water pipeline through the water-to-water heat exchanger in the form of heat exchange.
作为优选，所述的蒸汽管路经过汽机，将汽机产生的蒸汽输送至凝汽器，蒸汽经过凝汽器将热能传递给冷却水循环管路中的冷却水后凝水排出。Preferably, the steam pipeline passes through the steam turbine, and the steam generated by the steam turbine is sent to the condenser, and the steam passes through the condenser to transfer heat energy to the cooling water in the cooling water circulation pipeline, and then the condensed water is discharged.
本发明通过采用热泵技术回收生物质电厂烟风余热，具有热能回收利用率高，节能环保的优点。The invention adopts the heat pump technology to recycle the waste heat of the flue air of the biomass power plant, and has the advantages of high heat energy recycling rate, energy saving and environmental protection.
附图说明Description of drawings
图1为本发明实施例1的结构示意图。Fig. 1 is a schematic structural diagram of Embodiment 1 of the present invention.
其中：1-蒸汽管路、2-冷却水循环管路、3-烟气换热管路、4-内循环管路、5-除盐水管路、6-烟气换热器、7-吸收热泵、8-冷却塔、9-水水换热器、10-炉渣换热器、11-汽机、12-凝汽器、21-冷却循环水池、22-冷却循环泵、31-循环泵、41-供热循环泵、51-除盐水箱、52-控制阀、53-除氧器、54-给水泵。Among them: 1-steam pipeline, 2-cooling water circulation pipeline, 3-flue gas heat exchange pipeline, 4-internal circulation pipeline, 5-demineralized water pipeline, 6-flue gas heat exchanger, 7-absorption heat pump , 8-cooling tower, 9-water-water heat exchanger, 10-slag heat exchanger, 11-turbine, 12-condenser, 21-cooling circulating pool, 22-cooling circulating pump, 31-circulating pump, 41- Heating circulation pump, 51-demineralized water tank, 52-control valve, 53-deaerator, 54-feed water pump.
具体实施方式detailed description
下面结合附图1与具体实施方式对本发明作进一步详细描述：Below in conjunction with accompanying drawing 1 and specific embodiment the present invention is described in further detail:
一种生物质电厂烟风废热回收装置，如图1所示，包括蒸汽管路1、冷却水循环管路2、烟气换热管路3、内循环管路4以及除盐水管路5。A waste heat recovery device for flue gas in a biomass power plant, as shown in FIG.
所述的蒸汽管路1连接汽机11与凝汽器12；冷却水循环管路2从冷却循环水池21开始，经过凝汽器12、吸收热泵7以及冷却塔8后回到冷却循环水池21。汽机11产生的蒸汽输送至凝汽器12，蒸汽经过凝汽器12将热能传递给冷却水循环管路2中的冷却水，带有热能的冷却水经过吸收热泵7并在吸收热泵7内与内循环管路4进行热交换，内循环管路4通过水水换热器9将热能传递给除盐水管路5。The steam pipeline 1 connects the steam turbine 11 and the condenser 12; the cooling water circulation pipeline 2 starts from the cooling circulation pool 21, passes through the condenser 12, the absorption heat pump 7 and the cooling tower 8, and then returns to the cooling circulation pool 21. The steam generated by the steam turbine 11 is sent to the condenser 12, and the steam passes through the condenser 12 to transfer heat energy to the cooling water in the cooling water circulation pipeline 2, and the cooling water with heat energy passes through the absorption heat pump 7 and is connected with the absorption heat pump 7 The circulation pipeline 4 performs heat exchange, and the internal circulation pipeline 4 transfers heat energy to the desalinated water pipeline 5 through the water-to-water heat exchanger 9 .
冷却水循环管路2还经过冷却塔8，冷却塔8设置在吸收热泵7与水水换热器9之间。通过设置冷却塔8，可以将经过吸收热泵7的冷却水进一步冷却，并传输送到冷却循环水池21。冷却水循环管路2上设有冷却循环泵22，冷却循环泵22设置在冷却循环水池21与凝汽器12之间。冷却水循环管路2依次经过吸收热泵7、冷却塔8，在吸收热泵7处释放热能。The cooling water circulation pipeline 2 also passes through a cooling tower 8 which is arranged between the absorption heat pump 7 and the water-to-water heat exchanger 9 . By setting the cooling tower 8 , the cooling water passing through the absorption heat pump 7 can be further cooled and sent to the cooling circulation pool 21 . A cooling circulation pump 22 is provided on the cooling water circulation pipeline 2 , and the cooling circulation pump 22 is arranged between the cooling circulation water pool 21 and the condenser 12 . The cooling water circulation pipeline 2 passes through the absorption heat pump 7 and the cooling tower 8 in sequence, and releases heat energy at the absorption heat pump 7 .
蒸汽管路1经过汽机11，将汽机11产生的蒸汽输送至凝汽器12，蒸汽经过凝汽器12将热能传递给冷却水循环管路2中的冷却水后凝水排出。锅炉产生的蒸汽在汽机中作功，在这个热媒的循环过程中，需要放出大量的冷凝热，经汽机作功后的蒸汽通过排汽进入凝汽器12，在凝汽器12冷凝的过程中释放热能并凝结成水再经回热后进入锅炉，此时，经过凝汽器12冷却水循环管路2中的冷却水温度升高。The steam pipeline 1 passes through the steam turbine 11, and transports the steam generated by the steam turbine 11 to the condenser 12. The steam passes through the condenser 12 to transfer heat energy to the cooling water in the cooling water circulation pipeline 2, and then the condensed water is discharged. The steam produced by the boiler does work in the steam turbine. During the circulation process of the heat medium, a large amount of condensation heat needs to be released. The steam after the work of the steam turbine enters the condenser 12 through the exhaust steam, and is condensed in the condenser 12. Release heat energy in the water, condense into water and then enter the boiler after reheating. At this time, the temperature of the cooling water in the cooling water circulation pipeline 2 passing through the condenser 12 increases.
所述的烟气换热管路3设有烟气换热器6，经过吸收热泵7热吸收后，回到烟气换热器6。所述的烟气换热管路中还设有循环泵31。所述烟气换热管路经过烟气换热器6进行吸热，使烟气换热管路3中的水温达到145℃以上，进而连接到吸收热泵7释放热量，而后通过循环泵的作用，烟气换热管路3循环回收烟气中的废热。烟气换热管路3中的热水经过吸收热泵7并在吸收热泵7内与内循环管路4进行热交换，内循环管路4通过水水换热器9将热能传递给除盐水管路5。The flue gas heat exchange pipeline 3 is provided with a flue gas heat exchanger 6 , and returns to the flue gas heat exchanger 6 after being absorbed by the absorption heat pump 7 . A circulation pump 31 is also provided in the flue gas heat exchange pipeline. The flue gas heat exchange pipeline absorbs heat through the flue gas heat exchanger 6, so that the water temperature in the flue gas heat exchange pipeline 3 reaches above 145°C, and then connects to the absorption heat pump 7 to release heat, and then through the action of the circulation pump , the flue gas heat exchange pipeline 3 circulates and recovers the waste heat in the flue gas. The hot water in the flue gas heat exchange pipeline 3 passes through the absorption heat pump 7 and exchanges heat with the internal circulation pipeline 4 in the absorption heat pump 7, and the internal circulation pipeline 4 transfers heat energy to the demineralized water pipe through the water-to-water heat exchanger 9 Road 5.
本实施例还包括内循环管路4，内循环管路4经过吸收热泵7以及水水换热器9。内循环管路4通过冷却水循环管路2上的吸收热泵7进行热交换获取热能，然后通过水水换热器9将获得的热能以热交换的方式传递给除盐水管路5。内循环管路4上设有供热循环泵41，供热循环泵41设置在吸收热泵7与水水换热器9之间。内循环管路4内的水经过吸收热泵7，经过吸收热量的冷却水温度更高，水温达到90℃左右，然后经过水水换热器9释放热能后温度下降至53℃以下。This embodiment also includes an internal circulation pipeline 4 , and the internal circulation pipeline 4 passes through an absorption heat pump 7 and a water-to-water heat exchanger 9 . The internal circulation pipeline 4 obtains heat energy through heat exchange through the absorption heat pump 7 on the cooling water circulation pipeline 2 , and then transfers the obtained heat energy to the desalinated water pipeline 5 through the water-to-water heat exchanger 9 in the form of heat exchange. A heat supply circulation pump 41 is provided on the internal circulation pipeline 4 , and the heat supply circulation pump 41 is arranged between the absorption heat pump 7 and the water-to-water heat exchanger 9 . The water in the internal circulation pipeline 4 passes through the absorption heat pump 7, and the temperature of the cooling water after absorbing heat is higher, and the water temperature reaches about 90°C, and then the temperature drops below 53°C after passing through the water-to-water heat exchanger 9 to release heat energy.
所述的除盐水管路5连接除盐水箱51和炉渣换热器10，经过水水换热器9后通过除盐水回水管路回到除盐水箱51。所述的炉渣换热器10通过热交换的方式回收锅炉废渣中的余热。除盐水管路5上设有除盐水管路循环泵，除盐水管路循环泵设置在水水换热器9与炉渣换热器10之间。除盐水管路5中的热能通过水水换热器9和炉渣换热器10获得。除盐水管路5经过炉渣换热器10后水温升高到50℃，进而经过水水换热器9后再次吸收热能，水温达到70℃。The desalinated water pipeline 5 is connected to the desalted water tank 51 and the slag heat exchanger 10 , and returns to the desalted water tank 51 through the desalted water return pipeline after passing through the water-water heat exchanger 9 . The slag heat exchanger 10 recovers waste heat in boiler waste slag through heat exchange. The desalinated water pipeline 5 is provided with a desalted water pipeline circulation pump, and the desalted water pipeline circulation pump is arranged between the water-water heat exchanger 9 and the slag heat exchanger 10 . The heat energy in the desalted water pipeline 5 is obtained through the water-to-water heat exchanger 9 and the slag heat exchanger 10 . After the desalted water pipeline 5 passes through the slag heat exchanger 10, the water temperature rises to 50°C, and then passes through the water-to-water heat exchanger 9 to absorb heat energy again, and the water temperature reaches 70°C.
所述的除盐水回水管路上还设有除盐水回水管路控制阀52，水水换热器9与除盐水回水管路控制阀52之间设有除氧管路，除氧管路与除氧器53连接。所述的除氧器53通过给水泵54通入锅炉给水。当除盐水回水管路控制阀52关闭时，除盐水管路中的水通过水水换热器9后回流至除盐水箱51；当除盐水回水管路控制阀52打开时，除盐水管路中的水通过水水换热器9后通过除氧管路进入除氧器53，进而通过给水泵54进入锅炉。The desalinated water return pipeline is also provided with a desalted water return pipeline control valve 52, and a deoxygenation pipeline is provided between the water-water heat exchanger 9 and the desalinated water return pipeline control valve 52, and the deoxygenation pipeline is connected with the desalinated water return pipeline control valve 52. Oxygen device 53 is connected. The deaerator 53 is fed into the boiler feed water through the feed water pump 54 . When the desalted water return line control valve 52 is closed, the water in the desalinated water line passes through the water-to-water heat exchanger 9 and then returns to the desalinated water tank 51; when the desalinated water return line control valve 52 is opened, the desalinated water line The water in the boiler enters the deaerator 53 through the deaeration pipeline after passing through the water-water heat exchanger 9, and then enters the boiler through the feed water pump 54.
当除盐水管路5内水温升高至70℃以上后，打开除盐水回水管路控制阀52，将热水输送给除氧器53。经过除氧器53处理后的水通过给水泵54连接到烟气换热器6中进一步加热，温度升高到105℃以上，进一步连接到锅炉给水，从而将发电厂的炉渣余热进行有效的回收利用，具有热能回收利用率高，节能环保的优点。When the temperature of the water in the desalinated water pipeline 5 rises above 70° C., the control valve 52 of the desalted water return pipeline is opened to deliver hot water to the deaerator 53 . The water treated by the deaerator 53 is connected to the flue gas heat exchanger 6 through the feed water pump 54 for further heating, and the temperature rises above 105°C, and is further connected to the boiler feed water, so as to effectively recover the slag waste heat of the power plant Utilization has the advantages of high heat energy recycling rate, energy saving and environmental protection.
以上对本发明所提供的生物质电厂烟风废热回收装置进行了详细介绍，对于本领域的一般技术人员，依据本发明实施例的思想，在具体实施方式及应用范围上均会有改变之处，可依据实际需要做相应变化。综上所述，本说明书内容不应理解为对本发明的限制。The waste heat recovery device for flue gas from a biomass power plant provided by the present invention has been introduced in detail above. For those of ordinary skill in the art, based on the idea of the embodiment of the present invention, there will be changes in the specific implementation and application range. Changes can be made according to actual needs. In summary, the contents of this specification should not be construed as limiting the present invention.
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| CN201706478U (en) * | 2010-02-10 | 2011-01-12 | 同方川崎空调设备有限公司 | Heat-recovering type demineralized water heating system |
| CN102374692A (en) * | 2011-09-29 | 2012-03-14 | 浙江工商大学 | Power-plant waste-heat recovering device |
| CN203024480U (en) * | 2012-12-25 | 2013-06-26 | 李同强 | Heat recovery unit for recovering flue gas and air waste heat of biomass power plant |
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| CN103017140A (en) | 2013-04-03 |
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