CN109578968B - Coal-fired power generation system with sectional coupling of coal-fired boiler and garbage incinerator - Google Patents
Coal-fired power generation system with sectional coupling of coal-fired boiler and garbage incinerator Download PDFInfo
- Publication number
- CN109578968B CN109578968B CN201811547645.1A CN201811547645A CN109578968B CN 109578968 B CN109578968 B CN 109578968B CN 201811547645 A CN201811547645 A CN 201811547645A CN 109578968 B CN109578968 B CN 109578968B
- Authority
- CN
- China
- Prior art keywords
- boiler
- coal
- fired
- outlet
- incineration boiler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010248 power generation Methods 0.000 title claims abstract description 58
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 52
- 230000008878 coupling Effects 0.000 title claims abstract description 10
- 238000010168 coupling process Methods 0.000 title claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 10
- 238000004056 waste incineration Methods 0.000 claims abstract description 190
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 238000000605 extraction Methods 0.000 claims abstract description 17
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- 230000001172 regenerating effect Effects 0.000 claims abstract 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 25
- 239000003546 flue gas Substances 0.000 claims description 25
- 238000013461 design Methods 0.000 claims description 22
- 239000002699 waste material Substances 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 7
- 239000012717 electrostatic precipitator Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 4
- 230000003009 desulfurizing effect Effects 0.000 claims 2
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 239000010791 domestic waste Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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)
Abstract
Description
技术领域Technical field
本发明属于火力发电技术领域，特别涉及一种燃煤锅炉与垃圾焚烧锅炉分段耦合的燃煤发电系统。The invention belongs to the technical field of thermal power generation, and particularly relates to a coal-fired power generation system in which a coal-fired boiler and a waste incineration boiler are coupled in sections.
背景技术Background technique
随着经济的迅速发展以及国民生活水平的日益提高，“垃圾围城”的困境日益突出，如何处理数量庞大的生活垃圾已成为目前我国面临的严峻问题之一。目前，生活垃圾的处理方式有三种：直接焚烧、卫生填埋和堆肥，相比于易造成二次污染的填埋与难以销售的垃圾堆肥，直接焚烧逐渐成为我国生活垃圾处理的主流方式。垃圾焚烧过程中，会产生大量的热量，将这部分热量用于发电，可实现余热回收及资源最大化使用。垃圾焚烧发电，主要是利用垃圾燃烧所放出的热量加热水以获得过热蒸汽，过热蒸汽膨胀做功推动汽轮机旋转，进而带动发电机发电。对于日处理垃圾量大于330t/d的垃圾焚烧发电厂，其余热锅炉的效率约为70～78％，汽轮机效率约为28～30.6％，发电机效率约为97％，垃圾焚烧发电厂的总发电效率在18～23％之间，远小于大容量燃煤电厂可达到的43％的发电效率。由此，对垃圾焚烧发电系统与常规的燃煤发电系统进行耦合，有望实现垃圾焚烧所产生热量的高效利用，进而解决垃圾焚烧发电厂效率偏低的问题。With the rapid development of the economy and the increasing improvement of national living standards, the dilemma of "garbage siege" has become increasingly prominent. How to deal with the huge amount of domestic garbage has become one of the severe problems currently facing our country. At present, there are three ways to treat domestic waste: direct incineration, sanitary landfill and composting. Compared with landfills that are prone to secondary pollution and garbage compost that is difficult to sell, direct incineration has gradually become the mainstream method of domestic waste treatment in my country. During the waste incineration process, a large amount of heat will be generated. Using this heat for power generation can realize waste heat recovery and maximize the use of resources. Waste incineration power generation mainly uses the heat released by waste combustion to heat water to obtain superheated steam. The superheated steam expands and uses work to drive the rotation of the steam turbine, which in turn drives the generator to generate electricity. For waste incineration power plants with a daily waste processing capacity greater than 330t/d, the efficiency of waste heat boilers is about 70 to 78%, the efficiency of steam turbines is about 28 to 30.6%, and the efficiency of generators is about 97%. The total efficiency of waste incineration power plants is The power generation efficiency is between 18% and 23%, which is far less than the 43% power generation efficiency that can be achieved by large-capacity coal-fired power plants. Therefore, coupling the waste incineration power generation system with the conventional coal-fired power generation system is expected to achieve efficient utilization of the heat generated by waste incineration, thereby solving the problem of low efficiency of waste incineration power plants.
现有的垃圾焚烧发电厂规模小，发电效率偏低，但其发电系统完备程度高，设备配置齐全，配有锅炉、汽轮机、发电机、烟气处理装置等一系列设备，以致垃圾焚烧发电厂投资成本高，单位投资约为1.8～2.2万/kW，建成后的运行与维护成本更是巨大。而常规燃煤发电是一种大型化、规模化、高效化的发电方式，其机组容量大，机组效率可达43％以上，单位投资成本较低，是垃圾焚烧发电厂的单位投资的1/4左右。由此，对垃圾焚烧发电厂与常规的燃煤发电厂进行系统集成，共用汽轮机、发电机及烟囱等设备，可节省垃圾焚烧发电厂的汽轮机发电机组及烟囱等设备的投资与运行维护费用，并可提高垃圾焚烧所产生热量的利用效率，从而带来显著的经济效益。The existing waste incineration power plants are small in scale and have low power generation efficiency. However, their power generation systems are highly complete and equipped with complete equipment, including boilers, steam turbines, generators, flue gas treatment devices and a series of equipment, so that the waste incineration power plants The investment cost is high, with a unit investment of about 18,000 to 22,000/kW, and the operation and maintenance costs after completion are even greater. Conventional coal-fired power generation is a large-scale, high-efficiency power generation method. Its unit capacity is large, the unit efficiency can reach more than 43%, and the unit investment cost is low, which is 1/1 of the unit investment of a waste incineration power plant. Around 4. Therefore, the system integration of waste incineration power plants and conventional coal-fired power plants and the sharing of steam turbines, generators, chimneys and other equipment can save the investment and operation and maintenance costs of the steam turbine generator sets and chimneys of waste incineration power plants. It can also improve the utilization efficiency of heat generated by waste incineration, thus bringing significant economic benefits.
发明内容Contents of the invention
本发明的目的是提供了一种燃煤锅炉与垃圾焚烧锅炉分段耦合的燃煤发电系统。其特征在于，该分段耦合燃煤发电系统是在燃煤锅炉1的烟道中从下至上依次安装燃煤锅炉空气预热器20、燃煤锅炉省煤器2、燃煤锅炉低温再热器3和燃煤锅炉高温再热器4；燃煤锅炉的烟道出口与静电除尘器21、脱硫塔22和烟囱23串联；燃煤锅炉的烟道顶部分别连接汽轮机高压缸5入口与汽轮机中压缸6入口，汽轮机中压缸6出口连接汽轮机低压缸7入口，汽轮机高压缸5与汽轮机中压缸6、汽轮机低压缸7与发电机8依次串联；汽轮机低压缸7的抽汽分别连接凝汽器9、8#低压加热器11、7#低压加热器12、6#低压加热器13和5#低压加热器14的入口；凝汽器9通过凝结水泵10与8#低压加热器11连接、8#低压加热器11与7#低压加热器12、6#低压加热器13、5#低压加热器14和燃煤锅炉除氧器15依次串联；凝结水泵10出口连接垃圾焚烧锅炉二次风预热器33的⑤出口；汽轮机中压缸6的抽汽分别连接燃煤锅炉除氧器15和3#高压加热器17入口，汽轮机高压缸5的抽汽连接2#高压加热器18和1#高压加热器19的入口，燃煤锅炉除氧器15通过燃煤锅炉给水泵16与3#高压加热器17连接，3#高压加热器17与2#高压加热器18、1#高压加热器19及燃煤锅炉的烟道入口依次串联；燃煤锅炉给水泵16出口分别连接垃圾焚烧锅炉二段省煤器28入口、垃圾焚烧锅炉一次风预热器32的③出口及垃圾焚烧锅炉二次风预热器33的③出口；垃圾焚烧锅炉二段省煤器28出口与1#高压加热器19出口及燃煤锅炉省煤器2入口连接；垃圾焚烧锅炉一段省煤器29的出口连接燃煤锅炉除氧器15入口，垃圾焚烧锅炉一段省煤器29的入口连接5#低压加热器14出口，5#低压加热器14出口连接垃圾焚烧锅炉一次风预热器32的④入口及垃圾焚烧锅炉二次风预热器33的④入口；垃圾焚烧锅炉二次风预热器33的②入口连接3#高压加热器17与2#高压加热器18的公共节点；垃圾焚烧锅炉24中安装垃圾焚烧锅炉蒸发器25和垃圾焚烧锅炉过热器27，顶部安装垃圾焚烧锅炉汽包26；垃圾焚烧锅炉二段省煤器28和垃圾焚烧锅炉一段省煤器29安装在垃圾焚烧锅炉24的烟道内；垃圾焚烧锅炉过热器27的⑥出口连接至燃煤锅炉高温再热器4的⑥入口；辅助加热器34与1#高压加热器19并联，然后与垃圾焚烧锅炉除氧器35、垃圾焚烧锅炉给水泵36和垃圾焚烧锅炉汽包26串联成回路；汽轮机高压缸5的抽气口⑦连接垃圾焚烧锅炉除氧器35的入口⑦；垃圾焚烧锅炉一次风预热器32的①入口连接至1#高压加热器19与2#高压加热器18的公共节点①；垃圾焚烧锅炉24的烟道出口与烟气净化塔30、布袋除尘器31和烟囱23串联。The object of the present invention is to provide a coal-fired power generation system in which a coal-fired boiler and a waste incineration boiler are coupled in sections. It is characterized in that the segmented coupled coal-fired power generation system installs a coal-fired boiler air preheater 20, a coal-fired boiler economizer 2, and a coal-fired boiler low-temperature reheater in the flue of the coal-fired boiler 1 from bottom to top. 3 and the high-temperature reheater 4 of the coal-fired boiler; the flue outlet of the coal-fired boiler is connected in series with the electrostatic precipitator 21, the desulfurization tower 22 and the chimney 23; the top of the flue of the coal-fired boiler is connected to the inlet of the steam turbine high-pressure cylinder 5 and the steam turbine medium pressure respectively. The inlet of cylinder 6, the outlet of turbine intermediate pressure cylinder 6 are connected to the inlet of turbine low pressure cylinder 7, the steam turbine high pressure cylinder 5 is connected in series with the steam turbine intermediate pressure cylinder 6, the steam turbine low pressure cylinder 7 and the generator 8 in sequence; the extraction steam of the steam turbine low pressure cylinder 7 is connected to the condenser steam respectively. The inlet of condenser 9, 8# low-pressure heater 11, 7# low-pressure heater 12, 6# low-pressure heater 13 and 5# low-pressure heater 14; the condenser 9 is connected to the 8# low-pressure heater 11 through the condensate pump 10, The 8# low-pressure heater 11 is connected in series with the 7# low-pressure heater 12, 6# low-pressure heater 13, 5# low-pressure heater 14 and the coal-fired boiler deaerator 15; the outlet of the condensate pump 10 is connected to the secondary air preheater of the waste incineration boiler. The ⑤ outlet of the heater 33; the extraction steam of the steam turbine medium pressure cylinder 6 is connected to the coal-fired boiler deaerator 15 and the 3# high pressure heater 17 inlet respectively, and the extraction steam of the steam turbine high pressure cylinder 5 is connected to the 2# high pressure heater 18 and 1# At the entrance of the high-pressure heater 19, the coal-fired boiler deaerator 15 is connected to the 3# high-pressure heater 17 through the coal-fired boiler feed water pump 16. The 3# high-pressure heater 17 is connected to the 2# high-pressure heater 18 and the 1# high-pressure heater 19. and the flue inlet of the coal-fired boiler are connected in series; the outlet of the coal-fired boiler feed water pump 16 is connected to the inlet of the second-stage economizer 28 of the waste incineration boiler, the ③ outlet of the primary air preheater 32 of the waste incineration boiler, and the secondary air of the waste incineration boiler. The ③ outlet of the preheater 33; the outlet 28 of the second-stage economizer of the waste incineration boiler is connected to the outlet 19 of the 1# high-pressure heater and the inlet of the economizer 2 of the coal-fired boiler; the outlet 29 of the first-stage economizer of the waste incineration boiler is connected to the coal-fired The inlet of the boiler deaerator 15, the inlet of the economizer 29 of the first section of the waste incineration boiler is connected to the outlet of the 5# low-pressure heater 14, and the outlet of the 5# low-pressure heater 14 is connected to the ④ inlet of the primary air preheater 32 of the waste incineration boiler and the waste incineration boiler. The ④ inlet of the secondary air preheater 33; the ② inlet of the secondary air preheater 33 of the waste incineration boiler is connected to the common node of the 3# high-pressure heater 17 and the 2# high-pressure heater 18; the waste incineration boiler 24 is installed in the The boiler evaporator 25 and the waste incineration boiler superheater 27 are installed on the top of the waste incineration boiler steam drum 26; the waste incineration boiler second-stage economizer 28 and the waste incineration boiler first-stage economizer 29 are installed in the flue of the waste incineration boiler 24; The ⑥ outlet of the incineration boiler superheater 27 is connected to the ⑥ inlet of the coal-fired boiler high-temperature reheater 4; the auxiliary heater 34 is connected in parallel with the 1# high-pressure heater 19, and then connected to the waste incineration boiler deaerator 35 and the waste incineration boiler feed water pump 36 and the waste incineration boiler steam drum 26 are connected in series to form a loop; the air extraction port ⑦ of the steam turbine high-pressure cylinder 5 is connected to the inlet ⑦ of the waste incineration boiler deaerator 35; the ① inlet of the waste incineration boiler primary air preheater 32 is connected to the 1# high-pressure heating The common node ① of the heater 19 and the 2# high-pressure heater 18; the flue outlet of the waste incineration boiler 24 is connected in series with the flue gas purification tower 30, bag dust collector 31 and chimney 23.
一种燃煤锅炉与垃圾焚烧锅炉分段耦合的燃煤发电系统的发电方法，其特征在于，分段耦合包括：将垃圾焚烧锅炉的蒸发器和省煤器与燃煤发电机组的回热系统相结合；将垃圾焚烧锅炉的过热器与燃煤发电机组的再热蒸汽加热侧相结合；将垃圾焚烧锅炉一、二次风预热系统与燃煤发电机组的回热系统相结合，从而实现垃圾焚烧锅炉分段与燃煤发电机组耦合。A power generation method of a coal-fired power generation system in which a coal-fired boiler and a waste incineration boiler are coupled in sections, characterized in that the section coupling includes: connecting the evaporator and economizer of the waste incineration boiler with the heat recovery system of the coal-fired generating unit Combine; combine the superheater of the waste incineration boiler with the reheat steam heating side of the coal-fired power generation unit; combine the primary and secondary air preheating systems of the waste incineration boiler with the heat recovery system of the coal-fired power generation unit to achieve The waste incineration boiler is segmented and coupled with the coal-fired power generation unit.
垃圾焚烧锅炉的蒸发器和省煤器与燃煤发电机组的回热系统相结合部分：垃圾焚烧锅炉汽包26出口饱和蒸汽输送至辅助加热器34，用于加热2#高压加热器18出口部分给水，出口给水达到设计温度后与1#高压加热器19出口给水混合，而后进入燃煤锅炉省煤器2加热，辅助加热器34出口高温水进入垃圾焚烧锅炉除氧器35进行除氧，抽取部分燃煤锅炉回热系统的抽汽作为垃圾焚烧锅炉除氧器35的热源，以保证垃圾焚烧锅炉除氧器35工作稳定，再经垃圾焚烧锅炉给水泵36加压达到设定压力后打回垃圾焚烧锅炉蒸发器25加热，垃圾焚烧锅炉24循环工质达到设定压力后，送入垃圾焚烧锅炉汽包26，由此完成一个加热循环；燃煤锅炉给水泵16出口部分给水进入垃圾焚烧锅炉二段省煤器28吸收垃圾焚烧锅炉24的烟气热量，该给水与1#高压加热器19出口给水均达到设计温度后混合后进入燃煤锅炉省煤器2加热，5#低压加热器14出口给水分出一路给水进入垃圾焚烧锅炉一段省煤器29吸收垃圾焚烧锅炉24的烟气热量，给水达到设定温度打回至燃煤锅炉除氧器15入口，而后进入燃煤锅炉除氧器15除氧加热。The evaporator and economizer of the waste incineration boiler are combined with the heat recovery system of the coal-fired power generation unit: the saturated steam at the outlet of the steam drum 26 of the waste incineration boiler is transported to the auxiliary heater 34 for heating the outlet of the 2# high-pressure heater 18 Water supply, after the outlet water reaches the design temperature, it is mixed with the water from the outlet of 1# high-pressure heater 19, and then enters the economizer 2 of the coal-fired boiler for heating. The high-temperature water from the outlet of the auxiliary heater 34 enters the waste incineration boiler deaerator 35 for deoxygenation and extraction. The extraction steam from the heat recovery system of some coal-fired boilers is used as the heat source for the waste incineration boiler deaerator 35 to ensure the stable operation of the waste incineration boiler deaerator 35. It is then pressurized by the waste incineration boiler feed water pump 36 to reach the set pressure and then pumped back. The evaporator 25 of the waste incineration boiler is heated. After the circulating working fluid of the waste incineration boiler 24 reaches the set pressure, it is sent to the steam drum 26 of the waste incineration boiler, thereby completing a heating cycle; the outlet part of the coal-fired boiler feed water pump 16 feeds water into the waste incineration boiler. The second-stage economizer 28 absorbs the flue gas heat from the waste incineration boiler 24. The feed water and the outlet feed water of the 1# high-pressure heater 19 both reach the design temperature and are mixed before entering the coal-fired boiler economizer 2 for heating. The 5# low-pressure heater 14 The outlet water is fed all the way into the waste incineration boiler. The economizer 29 absorbs the flue gas heat of the waste incineration boiler 24. When the water reaches the set temperature, it is returned to the entrance of the coal-fired boiler deaerator 15, and then enters the coal-fired boiler deaerator. 15. Oxygen removal and heating.
垃圾焚烧锅炉的过热器与燃煤发电机组的再热蒸汽加热侧相结合部分：抽取部分汽轮机高压缸5出口的高压缸出口蒸汽，送入垃圾焚烧锅炉过热器27加热，吸收垃圾焚烧锅炉24的烟气热量，出口再热蒸汽达到原垃圾焚烧锅炉过热器27出口温度后与燃煤锅炉低温再热器3出口再热蒸汽混合进入燃煤锅炉高温再热器4。The superheater of the waste incineration boiler is combined with the reheat steam heating side of the coal-fired power generation unit: extract part of the high-pressure cylinder outlet steam from the outlet of the high-pressure cylinder 5 of the steam turbine, send it to the superheater 27 of the waste incineration boiler for heating, and absorb the steam from the waste incineration boiler 24 After the flue gas heat reaches the outlet temperature of the superheater 27 of the original waste incineration boiler, the outlet reheat steam mixes with the reheat steam at the outlet of the low temperature reheater 3 of the coal-fired boiler and enters the high-temperature reheater 4 of the coal-fired boiler.
垃圾焚烧锅炉一、二次风预热系统与燃煤发电机组的回热系统相结合部分：5#低压加热器14出口凝结水分两路，一路凝结水经燃煤锅炉除氧器15加热，另一路经垃圾焚烧锅炉一次风预热器32与垃圾焚烧锅炉二次风预热器33的第一加热段放热，放热后凝结水打到8#低压加热器11入口；2#高压加热器18出口给水分出一路经垃圾焚烧锅炉一次风预热器32的第二加热段放热，给水达到设计温度后打到燃煤锅炉给水泵16出口，而后依次进入高压加热器加热；3#高压加热器17出口给水分出一路经垃圾焚烧锅炉二次风预热器33的第二加热段放热，给水达到设计温度后打到燃煤锅炉给水泵16出口，而后依次进入高压加热器加热。The combination of the primary and secondary air preheating systems of the waste incineration boiler and the heat recovery system of the coal-fired power generation unit: there are two channels for condensed water at the outlet of the 5# low-pressure heater 14, one channel of condensed water is heated by the coal-fired boiler deaerator 15, and the other All the way through the first heating section of the primary air preheater 32 of the waste incineration boiler and the secondary air preheater 33 of the waste incineration boiler, heat is released. After the heat is released, the condensed water hits the entrance of the 8# low-pressure heater 11; the 2# high-pressure heater The feed water from outlet 18 passes through the second heating section of the primary air preheater 32 of the waste incineration boiler to release heat. After the feed water reaches the design temperature, it flows to the coal-fired boiler feed water pump outlet 16, and then enters the high-pressure heater in turn for heating; 3# high pressure The feed water from the outlet of the heater 17 passes through the second heating section of the secondary air preheater 33 of the waste incineration boiler to release heat. After the feed water reaches the design temperature, it flows to the outlet of the coal-fired boiler feed water pump 16, and then enters the high-pressure heater for heating.
通过控制垃圾焚烧锅炉汽包26出口饱和蒸汽所加热的给水流量、进入垃圾焚烧锅炉过热器27的高压缸出口蒸汽流量、进入垃圾焚烧炉省煤器的给水及凝结水流量和垃圾焚烧锅炉一、二次风预热所用的给水及凝结水流量，保证燃煤锅炉给水参数能达到设计值。By controlling the flow of feed water heated by the saturated steam at the outlet of the steam drum 26 of the waste incineration boiler, the flow of steam at the outlet of the high-pressure cylinder entering the superheater 27 of the waste incineration boiler, the flow of feed water and condensed water entering the economizer of the waste incineration boiler, and the flow of the waste incineration boiler 1. The feed water and condensate water flow used for secondary air preheating ensure that the feed water parameters of the coal-fired boiler can reach the design value.
燃煤锅炉空气预热器20出口烟气依次经过静电除尘器21，脱硫塔22后进入烟囱23排出；垃圾焚烧锅炉24出口烟气依次经烟气净化塔30，布袋除尘器31后与燃煤锅炉1的烟气混合后进入烟囱23排出。The flue gas from the outlet of the air preheater 20 of the coal-fired boiler passes through the electrostatic precipitator 21 and the desulfurization tower 22 and then enters the chimney 23 and is discharged; the flue gas from the outlet of the waste incineration boiler 24 passes through the flue gas purification tower 30 and the bag dust collector 31 and then mixes with the coal-fired The flue gas from the boiler 1 is mixed and then enters the chimney 23 for discharge.
当燃煤锅炉1全停之后，在启动时由垃圾焚烧锅炉24提供合格的辅助蒸汽，对锅炉的管道、旋风分离器等进行暖管，均匀受热，使其达到起炉的标准。When the coal-fired boiler 1 is completely stopped, the waste incineration boiler 24 will provide qualified auxiliary steam during startup to warm the boiler's pipes, cyclone separators, etc. and evenly heat them to meet the standards for starting the furnace.
本发明的有益效果为：本发明提出的燃煤锅炉与垃圾焚烧锅炉分段耦合的燃煤发电系统，是将垃圾焚烧锅炉汽包的出口饱和蒸汽、垃圾焚烧锅炉的过热器和省煤器与燃煤机组的回热系统和再热系统有效的结合起来。本分段耦合的燃煤发电系统的燃煤侧的发电效率与煤耗率基本不变，而此系统发电功率大于分开发电的发电功率之和；利用垃圾焚烧锅炉过热器加热部分高压缸出口蒸汽，提高了再热蒸汽的加热能力，进而提高了垃圾焚烧所产生热量的利用率，使原垃圾焚烧锅炉可实现的发电功率增加。同时，垃圾焚烧锅炉也可以作为燃煤锅炉的启动锅炉，当燃煤锅炉全停之后，在启动时提供合格的辅助蒸汽，对锅炉的管道、旋风分离器等进行暖管，均匀受热，使其达到起炉的标准。本发明对现有机组的改造变动以及安全性影响较小，缩小了占地面积，解决了垃圾焚烧发电效率过低的问题，为垃圾焚烧锅炉本体与燃煤锅炉的集成发电提供了更为开阔的思路。The beneficial effects of the present invention are: the coal-fired power generation system in which the coal-fired boiler and the waste incineration boiler are coupled in sections proposed by the present invention combine the saturated steam at the outlet of the steam drum of the waste incineration boiler, the superheater and economizer of the waste incineration boiler with The heat recovery system and reheat system of the coal-fired unit are effectively combined. The power generation efficiency and coal consumption rate of the coal-fired side of this segmented coupled coal-fired power generation system are basically unchanged, and the power generation power of this system is greater than the sum of the power generation power of separate power generation; the waste incineration boiler superheater is used to heat part of the high-pressure cylinder outlet steam, The heating capacity of the reheated steam is improved, thereby improving the utilization rate of heat generated by waste incineration, and increasing the power generation power that can be achieved by the original waste incineration boiler. At the same time, the waste incineration boiler can also be used as the starting boiler of the coal-fired boiler. When the coal-fired boiler is completely stopped, qualified auxiliary steam will be provided at startup to warm the boiler's pipes, cyclone separators, etc., and evenly heat them. Reach the starting standard. The invention has little impact on the modification and safety of the existing unit, reduces the floor area, solves the problem of low waste incineration power generation efficiency, and provides a more open space for the integrated power generation of the waste incineration boiler body and the coal-fired boiler. ideas.
附图说明Description of the drawings
图1为一种与垃圾焚烧锅炉分段耦合的燃煤发电系统流程示意图Figure 1 is a schematic flow diagram of a coal-fired power generation system coupled segmentally with a waste incineration boiler.
标号说明：1-燃煤锅炉；2-燃煤锅炉省煤器；3-燃煤锅炉低温再热器；4-燃煤锅炉高温再热器；5-汽轮机高压缸；6-汽轮机中压缸；7-汽轮机低压缸；8-发电机；9-凝汽器；10-凝结水泵；11-8#低压加热器；12-7#低压加热器；13-6#低压加热器；14-5#低压加热器；15-燃煤锅炉除氧器；16-燃煤锅炉给水泵；17-3#高压加热器；18-2#高压加热器；19-1#高压加热器；20-燃煤锅炉空气预热器；21-静电除尘器；22-脱硫塔；23-烟囱；24-垃圾焚烧锅炉；25-垃圾焚烧锅炉蒸发器；26-垃圾焚烧锅炉汽包；27-垃圾焚烧锅炉过热器；28-垃圾焚烧锅炉二段省煤器；29-垃圾焚烧锅炉一段省煤器；30-烟气净化塔；31-布袋除尘器；32-垃圾焚烧锅炉一次风预热器；33-垃圾焚烧锅炉二次风预热器；34-辅助加热器；35-垃圾焚烧锅炉除氧器；36-垃圾焚烧锅炉给水泵Label description: 1-coal-fired boiler; 2-coal-fired boiler economizer; 3-coal-fired boiler low-temperature reheater; 4-coal-fired boiler high-temperature reheater; 5-steam turbine high-pressure cylinder; 6-steam turbine medium-pressure cylinder ; 7-Turbine low-pressure cylinder; 8-Generator; 9-Condenser; 10-Condensate pump; 11-8# low-pressure heater; 12-7# low-pressure heater; 13-6# low-pressure heater; 14-5 #Low-pressure heater; 15-coal-fired boiler deaerator; 16-coal-fired boiler feed water pump; 17-3# high-pressure heater; 18-2# high-pressure heater; 19-1# high-pressure heater; 20-coal-fired boiler Boiler air preheater; 21-Electrostatic precipitator; 22-Desulfurization tower; 23-Chimney; 24-Waste incineration boiler; 25-Waste incineration boiler evaporator; 26-Waste incineration boiler steam drum; 27-Waste incineration boiler superheater ; 28-Second-stage economizer for waste incineration boiler; 29-First-stage economizer for waste incineration boiler; 30-Fume purification tower; 31-Bag dust collector; 32-Primary air preheater for waste incineration boiler; 33-Waste incineration boiler Boiler secondary air preheater; 34-auxiliary heater; 35-waste incineration boiler deaerator; 36-waste incineration boiler feed water pump
具体实施方式Detailed ways
本发明提供了一种燃煤锅炉与垃圾焚烧锅炉分段耦合的燃煤发电系统。下面结合附图和具体实施方式对本发明做进一步说明。The invention provides a coal-fired power generation system in which a coal-fired boiler and a waste incineration boiler are coupled in sections. The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
图1所示为燃煤锅炉与垃圾焚烧锅炉分段耦合的燃煤发电系统流程示意图。图中所示，，该分段耦合燃煤发电系统是在燃煤锅炉1的烟道中从下至上依次安装燃煤锅炉空气预热器20、燃煤锅炉省煤器2、燃煤锅炉低温再热器3和燃煤锅炉高温再热器4；燃煤锅炉的烟道出口与静电除尘器21、脱硫塔22和烟囱23串联；燃煤锅炉的烟道顶部分别连接汽轮机高压缸5入口与汽轮机中压缸6入口，汽轮机中压缸6出口连接汽轮机低压缸7入口，汽轮机高压缸5与汽轮机中压缸6、汽轮机低压缸7与发电机8依次串联；汽轮机低压缸7的抽汽分别连接凝汽器9、8#低压加热器11、7#低压加热器12、6#低压加热器13和5#低压加热器14的入口；凝汽器9通过凝结水泵10与8#低压加热器11连接、8#低压加热器11与7#低压加热器12、6#低压加热器13、5#低压加热器14和燃煤锅炉除氧器15依次串联；凝结水泵10出口连接垃圾焚烧锅炉二次风预热器33的⑤出口；汽轮机中压缸6的抽汽分别连接燃煤锅炉除氧器15和3#高压加热器17入口，汽轮机高压缸5的抽汽连接2#高压加热器18和1#高压加热器19的入口，燃煤锅炉除氧器15通过燃煤锅炉给水泵16与3#高压加热器17连接，3#高压加热器17与2#高压加热器18、1#高压加热器19及燃煤锅炉的烟道入口依次串联；燃煤锅炉给水泵16出口分别连接垃圾焚烧锅炉二段省煤器28入口、垃圾焚烧锅炉一次风预热器32的③出口及垃圾焚烧锅炉二次风预热器33的③出口；垃圾焚烧锅炉二段省煤器28出口与1#高压加热器19出口及燃煤锅炉省煤器2入口连接；垃圾焚烧锅炉一段省煤器29的出口连接燃煤锅炉除氧器15入口，垃圾焚烧锅炉一段省煤器29的入口连接5#低压加热器14出口，5#低压加热器14出口连接垃圾焚烧锅炉一次风预热器32的④入口及垃圾焚烧锅炉二次风预热器33的④入口；垃圾焚烧锅炉二次风预热器33的②入口连接3#高压加热器17与2#高压加热器18的公共节点；垃圾焚烧锅炉24中安装垃圾焚烧锅炉蒸发器25和垃圾焚烧锅炉过热器27，顶部安装垃圾焚烧锅炉汽包26；垃圾焚烧锅炉二段省煤器28和垃圾焚烧锅炉一段省煤器29安装在垃圾焚烧锅炉24的烟道内；垃圾焚烧锅炉过热器27的⑥出口连接至燃煤锅炉高温再热器4的⑥入口；辅助加热器34与1#高压加热器19并联，然后与垃圾焚烧锅炉除氧器35、垃圾焚烧锅炉给水泵36和垃圾焚烧锅炉汽包26串联成回路；汽轮机高压缸5的抽气口⑦连接垃圾焚烧锅炉除氧器35的入口⑦；垃圾焚烧锅炉一次风预热器32的①入口连接至1#高压加热器19与2#高压加热器18的公共节点①；垃圾焚烧锅炉24的烟道出口与烟气净化塔30、布袋除尘器31和烟囱23串联。Figure 1 shows a schematic flow diagram of a coal-fired power generation system in which coal-fired boilers and waste incineration boilers are coupled in sections. As shown in the figure, the segmented coupled coal-fired power generation system is to install the coal-fired boiler air preheater 20, the coal-fired boiler economizer 2, the coal-fired boiler low temperature reheater in the flue of the coal-fired boiler 1 from bottom to top. Heater 3 and high-temperature reheater 4 of the coal-fired boiler; the flue outlet of the coal-fired boiler is connected in series with the electrostatic precipitator 21, desulfurization tower 22 and chimney 23; the top of the flue of the coal-fired boiler is connected to the inlet of the steam turbine high-pressure cylinder 5 and the steam turbine respectively. The inlet of intermediate pressure cylinder 6, the outlet of turbine intermediate pressure cylinder 6 are connected to the inlet of turbine low pressure cylinder 7, the steam turbine high pressure cylinder 5 is connected in series with the steam turbine intermediate pressure cylinder 6, the steam turbine low pressure cylinder 7 and the generator 8 are sequentially connected in series; the extraction steam of the steam turbine low pressure cylinder 7 is connected respectively. The inlet of condenser 9, 8# low-pressure heater 11, 7# low-pressure heater 12, 6# low-pressure heater 13 and 5# low-pressure heater 14; condenser 9 communicates with 8# low-pressure heater 11 through the condensate pump 10 Connect, 8# low-pressure heater 11 and 7# low-pressure heater 12, 6# low-pressure heater 13, 5# low-pressure heater 14 and coal-fired boiler deaerator 15 in series; the outlet of condensate pump 10 is connected to the secondary waste incineration boiler The ⑤ outlet of the air preheater 33; the extraction steam of the steam turbine medium pressure cylinder 6 is connected to the coal-fired boiler deaerator 15 and the entrance of the 3# high pressure heater 17, and the extraction steam of the steam turbine high pressure cylinder 5 is connected to the 2# high pressure heater 18 and At the entrance of the 1# high-pressure heater 19, the coal-fired boiler deaerator 15 is connected to the 3# high-pressure heater 17 through the coal-fired boiler feed water pump 16. The 3# high-pressure heater 17 is connected to the 2# high-pressure heater 18 and 1# high-pressure heater. 19 and the flue inlet of the coal-fired boiler are connected in series; the outlet of the coal-fired boiler feed water pump 16 is respectively connected to the inlet of the second-stage economizer 28 of the waste incineration boiler, the ③ outlet of the primary air preheater 32 of the waste incineration boiler and the second section of the waste incineration boiler. The ③ outlet of the secondary air preheater 33; the outlet 28 of the second-stage economizer of the waste incineration boiler is connected to the outlet 19 of the 1# high-pressure heater and the inlet of the economizer 2 of the coal-fired boiler; the outlet of the first-stage economizer 29 of the waste incineration boiler is connected The inlet of the deaerator 15 of the coal-fired boiler, the inlet of the economizer 29 of the first section of the waste incineration boiler is connected to the outlet of the 5# low-pressure heater 14, and the outlet of the 5# low-pressure heater 14 is connected to the ④ inlet of the primary air preheater 32 of the waste incineration boiler and the garbage The ④ inlet of the secondary air preheater 33 of the incineration boiler; the ② inlet of the secondary air preheater 33 of the waste incineration boiler is connected to the common node of the 3# high-pressure heater 17 and the 2# high-pressure heater 18; installed in the waste incineration boiler 24 The waste incineration boiler evaporator 25 and the waste incineration boiler superheater 27 are installed on the top of the waste incineration boiler steam drum 26; the waste incineration boiler second-stage economizer 28 and the waste incineration boiler first-stage economizer 29 are installed in the flue of the waste incineration boiler 24 ; The ⑥ outlet of the waste incineration boiler superheater 27 is connected to the ⑥ inlet of the coal-fired boiler high-temperature reheater 4; the auxiliary heater 34 is connected in parallel with the 1# high-pressure heater 19, and then connected with the waste incineration boiler deaerator 35 and the waste incineration boiler The feed water pump 36 and the waste incineration boiler steam drum 26 are connected in series to form a loop; the air extraction port ⑦ of the steam turbine high-pressure cylinder 5 is connected to the inlet ⑦ of the waste incineration boiler deaerator 35; the ① inlet of the waste incineration boiler primary air preheater 32 is connected to 1# The common node ① of the high-pressure heater 19 and the 2# high-pressure heater 18; the flue outlet of the waste incineration boiler 24 is connected in series with the flue gas purification tower 30, bag dust collector 31 and chimney 23.
本发明燃煤锅炉与垃圾焚烧锅炉分段耦合的燃煤发电系统的分段耦合发电原理，其分段耦合包括：将垃圾焚烧锅炉的蒸发器和省煤器与燃煤发电机组的回热系统相结合；将垃圾焚烧锅炉的过热器与燃煤发电机组的再热蒸汽加热侧相结合；将垃圾焚烧锅炉一、二次风预热系统与燃煤发电机组的回热系统相结合，从而实现垃圾焚烧锅炉分段与燃煤发电机组耦合。在燃煤发电机组的回热系统和再热蒸汽加热侧的基础上，利用垃圾焚烧锅炉汽包26出口饱和蒸汽加热部分给水，利用垃圾焚烧锅炉省煤器加热部分给水及凝结水，给水或凝结水达到设计温度后送回燃煤发电机组的回热系统，利用垃圾焚烧锅炉过热器27加热部分高压缸出口蒸汽，出口再热蒸汽达原垃圾焚烧锅炉过热器27出口温度后与燃煤锅炉低温再热器3出口再热蒸汽混合后进入燃煤锅炉高温再热器4进一步加热；从燃煤发电机组的回热系统抽取部分给水及凝结水在垃圾焚烧锅炉一次风预热器32中加热垃圾焚烧锅炉一次风，垃圾焚烧锅炉一次风达到设计温度后从炉排下部送入垃圾焚烧锅炉24用于干燥和助燃；从燃煤发电机组的回热系统抽取部分给水及凝结水在垃圾焚烧锅炉二次风预热器33中加热垃圾焚烧锅炉二次风，垃圾焚烧锅炉二次风达到设计温度后送入垃圾焚烧锅炉24用于提高燃烧效果及保持燃烧室的温度。The segmented coupling power generation principle of the coal-fired power generation system in which the coal-fired boiler and the waste incineration boiler are segmented are coupled in the present invention. The segmented coupling includes: connecting the evaporator and economizer of the waste incineration boiler with the heat recovery system of the coal-fired generating unit. Combine; combine the superheater of the waste incineration boiler with the reheat steam heating side of the coal-fired power generation unit; combine the primary and secondary air preheating systems of the waste incineration boiler with the heat recovery system of the coal-fired power generation unit to achieve The waste incineration boiler is segmented and coupled with the coal-fired power generation unit. On the basis of the recuperation system and reheat steam heating side of the coal-fired power generation unit, the saturated steam at the outlet of the drum 26 of the waste incineration boiler is used to heat part of the water supply, and the economizer of the waste incineration boiler is used to heat part of the water supply and condensation water, and the water supply or condensation After the water reaches the design temperature, it is sent back to the heat recovery system of the coal-fired power generation unit. The waste incineration boiler superheater 27 is used to heat part of the high-pressure cylinder outlet steam. After the outlet reheated steam reaches the original waste incineration boiler superheater 27 outlet temperature, it is at the same temperature as the coal-fired boiler. The reheated steam at the outlet of reheater 3 is mixed and then enters the high-temperature reheater 4 of the coal-fired boiler for further heating; part of the feed water and condensate are extracted from the recuperation system of the coal-fired generating unit to heat the garbage in the primary air preheater 32 of the waste incineration boiler. The primary air of the incineration boiler reaches the design temperature and is sent from the lower part of the grate to the waste incineration boiler 24 for drying and combustion support; part of the feed water and condensed water are extracted from the heat recovery system of the coal-fired generating unit and are used in the waste incineration boiler 2 The secondary air of the waste incineration boiler is heated in the secondary air preheater 33. After the secondary air of the waste incineration boiler reaches the design temperature, it is sent to the waste incineration boiler 24 to improve the combustion effect and maintain the temperature of the combustion chamber.
垃圾焚烧锅炉的蒸发器和省煤器与燃煤发电机组的回热系统相结合部分：垃圾焚烧锅炉汽包26出口饱和蒸汽输送至辅助加热器34，用于加热2#高压加热器18出口部分给水，出口给水达到设计温度后与1#高压加热器19出口给水混合，而后进入燃煤锅炉省煤器2加热，辅助加热器34出口高温水进入垃圾焚烧锅炉除氧器35进行除氧，抽取部分燃煤锅炉回热系统的抽汽作为垃圾焚烧锅炉除氧器35的热源，以保证垃圾焚烧锅炉除氧器35工作稳定，再经垃圾焚烧锅炉给水泵36加压达到设定压力后打回垃圾焚烧锅炉蒸发器25加热，垃圾焚烧锅炉24循环工质达到设定压力后，送入垃圾焚烧锅炉汽包26，由此完成一个加热循环；燃煤锅炉给水泵16出口部分给水进入垃圾焚烧锅炉二段省煤器28吸收垃圾焚烧锅炉24的烟气热量，该给水与1#高压加热器19出口给水均达到设计温度后混合后进入燃煤锅炉省煤器2加热，5#低压加热器14出口给水分出一路给水进入垃圾焚烧锅炉一段省煤器29吸收垃圾焚烧锅炉24的烟气热量，给水达到设定温度打回至燃煤锅炉除氧器15入口，而后进入燃煤锅炉除氧器15除氧加热。The evaporator and economizer of the waste incineration boiler are combined with the heat recovery system of the coal-fired power generation unit: the saturated steam at the outlet of the steam drum 26 of the waste incineration boiler is transported to the auxiliary heater 34 for heating the outlet of the 2# high-pressure heater 18 Water supply, after the outlet water reaches the design temperature, it is mixed with the water from the outlet of 1# high-pressure heater 19, and then enters the economizer 2 of the coal-fired boiler for heating. The high-temperature water from the outlet of the auxiliary heater 34 enters the waste incineration boiler deaerator 35 for deoxygenation and extraction. The extraction steam from the heat recovery system of some coal-fired boilers is used as the heat source for the waste incineration boiler deaerator 35 to ensure the stable operation of the waste incineration boiler deaerator 35. It is then pressurized by the waste incineration boiler feed water pump 36 to reach the set pressure and then pumped back. The evaporator 25 of the waste incineration boiler is heated. After the circulating working fluid of the waste incineration boiler 24 reaches the set pressure, it is sent to the steam drum 26 of the waste incineration boiler, thereby completing a heating cycle; the outlet part of the coal-fired boiler feed water pump 16 feeds water into the waste incineration boiler. The second-stage economizer 28 absorbs the flue gas heat from the waste incineration boiler 24. The feed water and the outlet feed water of the 1# high-pressure heater 19 both reach the design temperature and are mixed before entering the coal-fired boiler economizer 2 for heating. The 5# low-pressure heater 14 The outlet water is fed all the way into the waste incineration boiler. The economizer 29 absorbs the flue gas heat of the waste incineration boiler 24. When the water reaches the set temperature, it is returned to the entrance of the coal-fired boiler deaerator 15, and then enters the coal-fired boiler deaerator. 15. Oxygen removal and heating.
垃圾焚烧锅炉的过热器与燃煤发电机组的再热蒸汽加热侧相结合部分：抽取部分汽轮机高压缸5出口的高压缸出口蒸汽，送入垃圾焚烧锅炉过热器27加热，吸收垃圾焚烧锅炉24的烟气热量，出口再热蒸汽达到原垃圾焚烧锅炉过热器27出口温度后与燃煤锅炉低温再热器3出口再热蒸汽混合进入燃煤锅炉高温再热器4。The superheater of the waste incineration boiler is combined with the reheat steam heating side of the coal-fired power generation unit: extract part of the high-pressure cylinder outlet steam from the outlet of the high-pressure cylinder 5 of the steam turbine, send it to the superheater 27 of the waste incineration boiler for heating, and absorb the steam from the waste incineration boiler 24 After the flue gas heat reaches the outlet temperature of the superheater 27 of the original waste incineration boiler, the outlet reheat steam mixes with the reheat steam at the outlet of the low temperature reheater 3 of the coal-fired boiler and enters the high-temperature reheater 4 of the coal-fired boiler.
垃圾焚烧锅炉一、二次风预热系统与燃煤发电机组的回热系统相结合部分：5#低压加热器14出口凝结水分两路，一路凝结水经燃煤锅炉除氧器15加热，另一路经垃圾焚烧锅炉一次风预热器32与垃圾焚烧锅炉二次风预热器33的第一加热段放热，放热后凝结水打到8#低压加热器11入口；2#高压加热器18出口给水分出一路经垃圾焚烧锅炉一次风预热器32的第二加热段放热，给水达到设计温度后打到燃煤锅炉给水泵16出口，而后依次进入高压加热器加热；3#高压加热器17出口给水分出一路经垃圾焚烧锅炉二次风预热器33的第二加热段放热，给水达到设计温度后打到燃煤锅炉给水泵16出口，而后依次进入高压加热器加热。The combination of the primary and secondary air preheating systems of the waste incineration boiler and the heat recovery system of the coal-fired power generation unit: there are two channels for condensed water at the outlet of the 5# low-pressure heater 14, one channel of condensed water is heated by the coal-fired boiler deaerator 15, and the other All the way through the first heating section of the primary air preheater 32 of the waste incineration boiler and the secondary air preheater 33 of the waste incineration boiler, heat is released. After the heat is released, the condensed water hits the entrance of the 8# low-pressure heater 11; the 2# high-pressure heater The feed water from outlet 18 passes through the second heating section of the primary air preheater 32 of the waste incineration boiler to release heat. After the feed water reaches the design temperature, it flows to the coal-fired boiler feed water pump outlet 16, and then enters the high-pressure heater in turn for heating; 3# high pressure The feed water from the outlet of the heater 17 passes through the second heating section of the secondary air preheater 33 of the waste incineration boiler to release heat. After the feed water reaches the design temperature, it flows to the outlet of the coal-fired boiler feed water pump 16, and then enters the high-pressure heater for heating.
通过控制垃圾焚烧锅炉汽包26出口饱和蒸汽所加热的给水流量、进入垃圾焚烧锅炉过热器27的高压缸出口蒸汽流量、进入垃圾焚烧炉省煤器的给水及凝结水流量和垃圾焚烧锅炉一、二次风预热所用的给水及凝结水流量，保证燃煤锅炉给水参数能达到设计值。By controlling the flow of feed water heated by the saturated steam at the outlet of the steam drum 26 of the waste incineration boiler, the flow of steam at the outlet of the high-pressure cylinder entering the superheater 27 of the waste incineration boiler, the flow of feed water and condensed water entering the economizer of the waste incineration boiler, and the flow of the waste incineration boiler 1. The feed water and condensate water flow used for secondary air preheating ensure that the feed water parameters of the coal-fired boiler can reach the design value.
燃煤锅炉空气预热器20出口烟气依次经过静电除尘器21，脱硫塔22后进入烟囱23排出；垃圾焚烧锅炉24出口烟气依次经烟气净化塔30，布袋除尘器31后与燃煤锅炉1的烟气混合后进入烟囱23排出。The flue gas from the outlet of the air preheater 20 of the coal-fired boiler passes through the electrostatic precipitator 21 and the desulfurization tower 22 and then enters the chimney 23 and is discharged; the flue gas from the outlet of the waste incineration boiler 24 passes through the flue gas purification tower 30 and the bag dust collector 31 and then mixes with the coal-fired The flue gas from the boiler 1 is mixed and then enters the chimney 23 for discharge.
当燃煤锅炉1全停之后，在启动时由垃圾焚烧锅炉24提供合格的辅助蒸汽，对锅炉的管道、旋风分离器等进行暖管，均匀受热，使其达到起炉的标准。When the coal-fired boiler 1 is completely stopped, the waste incineration boiler 24 will provide qualified auxiliary steam during startup to warm the boiler's pipes, cyclone separators, etc. and evenly heat them to meet the standards for starting the furnace.
下面结合算例，对发明的效果进行说明。The effect of the invention will be explained below with a calculation example.
将机组容量为600MW的燃煤发电机组与日处理垃圾量为500t/d的垃圾焚烧锅炉结合起来，图一为集成垃圾焚烧锅炉与燃煤锅炉的联合发电系统的结构示意图。以THA工况为参比系统，对图一所述实施例进行模拟，在燃煤发电功率基本保持不变的情况下，与常规同规模的垃圾焚烧发电站相比，联合发电系统将垃圾焚烧锅炉的烟气能量利用率提高了30％以上。A coal-fired power generation unit with a unit capacity of 600MW is combined with a waste incineration boiler with a daily waste processing capacity of 500t/d. Figure 1 is a schematic structural diagram of a combined power generation system integrating a waste incineration boiler and a coal-fired boiler. Taking the THA working condition as the reference system, the embodiment shown in Figure 1 is simulated. When the coal-fired power generation power remains basically unchanged, compared with the conventional waste incineration power station of the same scale, the combined power generation system incinerates the waste. The boiler's flue gas energy utilization rate has increased by more than 30%.
当燃煤锅炉1全停之后，在启动时由垃圾焚烧锅炉24提供合格的辅助蒸汽，对锅炉的管道、旋风分离器等进行暖管，均匀受热，使其达到起炉的标准。When the coal-fired boiler 1 is completely stopped, the waste incineration boiler 24 will provide qualified auxiliary steam during startup to warm the boiler's pipes, cyclone separators, etc. and evenly heat them to meet the standards for starting the furnace.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547645.1A CN109578968B (en) | 2018-12-18 | 2018-12-18 | Coal-fired power generation system with sectional coupling of coal-fired boiler and garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547645.1A CN109578968B (en) | 2018-12-18 | 2018-12-18 | Coal-fired power generation system with sectional coupling of coal-fired boiler and garbage incinerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109578968A CN109578968A (en) | 2019-04-05 |
| CN109578968B true CN109578968B (en) | 2023-10-20 |
Family
ID=65929830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811547645.1A Active CN109578968B (en) | 2018-12-18 | 2018-12-18 | Coal-fired power generation system with sectional coupling of coal-fired boiler and garbage incinerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109578968B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473314B (en) * | 2020-04-28 | 2024-05-24 | 中材节能股份有限公司 | Ultrahigh-pressure one-time reheating power generation system |
| CN111780126B (en) * | 2020-06-24 | 2023-01-03 | 中国能源建设集团广东省电力设计研究院有限公司 | Flue gas treatment system and method of solid incinerator coupling generator set |
| CN112013372A (en) * | 2020-08-14 | 2020-12-01 | 国家电投集团电站运营技术（北京）有限公司 | Biomass boiler power generation system |
| CN112393267B (en) * | 2020-11-20 | 2023-01-03 | 西安热工研究院有限公司 | Flue gas degree of depth waste heat utilization system of msw incineration power plant |
| CN112325311B (en) * | 2020-11-23 | 2025-04-08 | 东方电气集团东方锅炉股份有限公司 | Refuse incineration power generation coupling system |
| CN112325263B (en) * | 2020-11-23 | 2025-04-08 | 东方电气集团东方锅炉股份有限公司 | Efficient garbage power generation system of coupling coal-fired power plant |
| CN114234205A (en) * | 2021-12-15 | 2022-03-25 | 四川川锅锅炉有限责任公司 | Afterburning system for improving steam parameters of waste incineration waste heat boiler |
| CN114233404A (en) * | 2021-12-21 | 2022-03-25 | 上海康恒环境股份有限公司 | Efficient waste incineration waste heat utilization power generation system |
| CN114526474A (en) * | 2022-02-14 | 2022-05-24 | 东方菱日锅炉有限公司 | Dry burning prevention steam cooling system for reheater and dry burning prevention method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08284614A (en) * | 1995-04-10 | 1996-10-29 | Ishikawajima Harima Heavy Ind Co Ltd | Main steam pressure controller in steam generating plant |
| CN102767821A (en) * | 2012-06-27 | 2012-11-07 | 华北电力大学 | Smoke waste heat deep utilization system of power station boiler for heating supplied water at high pressure |
| CN107327326A (en) * | 2017-07-28 | 2017-11-07 | 浙江大学 | A kind of integral combined circulating power generation system of integrated garbage gas steam |
| CN107559058A (en) * | 2017-08-23 | 2018-01-09 | 哈尔滨锅炉厂有限责任公司 | A kind of Thermal-mechanical Coupling electricity generation system of waste incinerator middle pressure steam and coal unit |
| CN108194154A (en) * | 2017-12-28 | 2018-06-22 | 华西能源工业股份有限公司 | The super-pressure circulatory system and method for burning wind are heated in garbage power plant steam exhaust |
| CN108266718A (en) * | 2017-12-26 | 2018-07-10 | 哈尔滨锅炉厂有限责任公司 | The high level that waste incinerator low-lying level working medium is coupled with coal-burning boiler utilizes system |
| CN108412562A (en) * | 2018-02-05 | 2018-08-17 | 安徽国祯生态科技有限公司 | A kind of fire coal coupled biological matter electrification technique and device |
| CN108613191A (en) * | 2018-06-26 | 2018-10-02 | 上海垒锦环境科技中心 | A kind of energy utilization system that waste incinerator steam is coupled with coal unit |
| CN209744352U (en) * | 2018-12-18 | 2019-12-06 | 华北电力大学 | Coal-fired power generation system with coal-fired boiler and garbage incinerator coupled in sections |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110126549A1 (en) * | 2006-01-13 | 2011-06-02 | Pronske Keith L | Ultra low emissions fast starting power plant |
| EP2253807A1 (en) * | 2008-10-29 | 2010-11-24 | Vítkovice Power Engineering a.s. | Gas turbine cycle or combined steam-gas cycle for production of power from solid fuels and waste heat |
-
2018
- 2018-12-18 CN CN201811547645.1A patent/CN109578968B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08284614A (en) * | 1995-04-10 | 1996-10-29 | Ishikawajima Harima Heavy Ind Co Ltd | Main steam pressure controller in steam generating plant |
| CN102767821A (en) * | 2012-06-27 | 2012-11-07 | 华北电力大学 | Smoke waste heat deep utilization system of power station boiler for heating supplied water at high pressure |
| CN107327326A (en) * | 2017-07-28 | 2017-11-07 | 浙江大学 | A kind of integral combined circulating power generation system of integrated garbage gas steam |
| CN107559058A (en) * | 2017-08-23 | 2018-01-09 | 哈尔滨锅炉厂有限责任公司 | A kind of Thermal-mechanical Coupling electricity generation system of waste incinerator middle pressure steam and coal unit |
| CN108266718A (en) * | 2017-12-26 | 2018-07-10 | 哈尔滨锅炉厂有限责任公司 | The high level that waste incinerator low-lying level working medium is coupled with coal-burning boiler utilizes system |
| CN108194154A (en) * | 2017-12-28 | 2018-06-22 | 华西能源工业股份有限公司 | The super-pressure circulatory system and method for burning wind are heated in garbage power plant steam exhaust |
| CN108412562A (en) * | 2018-02-05 | 2018-08-17 | 安徽国祯生态科技有限公司 | A kind of fire coal coupled biological matter electrification technique and device |
| CN108613191A (en) * | 2018-06-26 | 2018-10-02 | 上海垒锦环境科技中心 | A kind of energy utilization system that waste incinerator steam is coupled with coal unit |
| CN209744352U (en) * | 2018-12-18 | 2019-12-06 | 华北电力大学 | Coal-fired power generation system with coal-fired boiler and garbage incinerator coupled in sections |
Non-Patent Citations (1)
| Title |
|---|
| 垃圾焚烧炉炉排自动控制策略研究;白建云;白正刚;;热力发电(第01期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109578968A (en) | 2019-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109578968B (en) | Coal-fired power generation system with sectional coupling of coal-fired boiler and garbage incinerator | |
| CN107014218B (en) | Thermal power generation system based on waste heat and complementary energy integrated utilization of coking plant | |
| CN209742983U (en) | A garbage and coal-fired integrated power generation system based on the coupling of steam and water systems | |
| CN108579384B (en) | A sludge treatment device with combined drying and incineration for power generation | |
| CN106090880A (en) | A kind of machine stove set heat circulation afterheat recycling system | |
| CN102767821B (en) | Smoke waste heat deep utilization system of power station boiler for heating supplied water at high pressure | |
| CN101270675A (en) | Hybrid thermal power generation system of solar and coal-fired units | |
| CN106989611B (en) | Coke oven gas and dry quenching waste heat comprehensive power generation system | |
| CN101392992A (en) | Silicon smelting electric furnace waste heat power generation process flow and configuration | |
| CN107269335B (en) | A garbage and gas-steam combined cycle power generation system using gas to dry garbage | |
| CN106016416A (en) | Boiler smoke and steam turbine exhaust coupled high-back-pressure combined heat and power generation system | |
| CN103353239A (en) | Improved lime kiln exhaust gas waste heat power generation system and power generation method thereof | |
| CN109764326A (en) | A lignite-based electricity-water combined supply system with integrated absorption heat pump and its working method | |
| CN209744352U (en) | Coal-fired power generation system with coal-fired boiler and garbage incinerator coupled in sections | |
| CN109027994A (en) | Utilize residual heat from boiler fume, decarburization waste heat and absorption heat pump coal generating system | |
| CN203703942U (en) | Boiler-side flue gas heat energy high-efficiency utilizing system for heating steam-turbine-side heat regenerative feed water | |
| CN109539216B (en) | A combined power generation system integrating waste incineration boilers and coal-fired boilers | |
| CN103277155B (en) | Brown coal are predrying-preheated air-UTILIZATION OF VESIDUAL HEAT IN compound coal generating system | |
| CN204593353U (en) | A kind of integrated system of deep exploitation residual heat from boiler fume | |
| CN211230591U (en) | A coupling complementary power generation system of waste incineration and biogas | |
| CN209978016U (en) | High-parameter garbage power generation system with reheating function | |
| CN102410740A (en) | A multi-stage exhaust gas waste heat power generation device for sintering machines and coolers in iron and steel plants | |
| CN112325263B (en) | Efficient garbage power generation system of coupling coal-fired power plant | |
| CN210948818U (en) | Waste incineration power generation system coupled with CO2 circulation and coal-fired power plant | |
| CN205619598U (en) | Dry complementary power generation system of supplementary air cooling unit of solar energy of integrated raw coal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |