CN102607091B - Combination method of waste heat of low-temperature industrial circulating cooling water and regional centralized heat supply - Google Patents
Combination method of waste heat of low-temperature industrial circulating cooling water and regional centralized heat supply Download PDFInfo
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- 239000002918 waste heat Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000498 cooling water Substances 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 123
- 238000010438 heat treatment Methods 0.000 claims abstract description 70
- 238000001816 cooling Methods 0.000 claims description 19
- 238000009776 industrial production Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 11
- 239000003245 coal Substances 0.000 description 8
- 239000002440 industrial waste Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
Description
技术领域 technical field
本发明涉及工业冷却循环水余热利用系统及方法，尤其涉及工业冷却循环水余热与区域集中供热联合利用方法。The invention relates to a system and method for utilizing waste heat of industrial cooling circulating water, in particular to a method for combined utilization of waste heat of industrial cooling circulating water and regional centralized heating.
背景技术 Background technique
我国目前正处于城市建设快速发展时期，建筑能耗占全国能耗总量的比例已上升至27.5％左右。我国的既有建筑已达400多亿m2，而且以每年新建16到20亿m2的速度在增长。因此，建筑能耗和建筑采暖能耗的市场需求极大。据中国建筑科学研究院的研究数据，我国北方城镇住宅能耗约为2.07亿吨标煤，占全国城镇住宅能耗的76％，其中65％是采暖能耗。北方地区采暖能耗约1.3亿吨标准煤，占全国建筑能耗的34％。可以说，北方地区建筑采暖能耗是我国建筑能耗的最大组成部分。my country is currently in a period of rapid urban construction, and the proportion of building energy consumption in the country's total energy consumption has risen to about 27.5%. The existing buildings in our country have reached more than 40 billion m 2 , and it is increasing at a rate of 1.6 to 2 billion m 2 each year. Therefore, the market demand for building energy consumption and building heating energy consumption is huge. According to the research data of the China Academy of Building Research, the energy consumption of urban residential buildings in northern my country is about 207 million tons of standard coal, accounting for 76% of the national urban residential energy consumption, of which 65% is heating energy consumption. Heating energy consumption in the northern region is about 130 million tons of standard coal, accounting for 34% of the national building energy consumption. It can be said that building heating energy consumption in northern China is the largest component of building energy consumption in my country.
由于受我国能源结构、技术、经济等因素的影响，目前我国建筑采暖能源仍然以煤为主，主要热源为热电联产电厂、集中供热锅炉房，以及分散的区域锅炉房等，既加剧了能源供应紧张状况，又带了严重的环境污染。因此，寻找新的、低污染或无污染的建筑供暖热源，就显得尤为迫切和必要。Due to the influence of my country's energy structure, technology, economy and other factors, coal is still the main energy source for building heating in my country at present, and the main heat sources are combined heat and power plants, central heating boiler rooms, and scattered regional boiler rooms. The tense situation of energy supply has brought serious environmental pollution. Therefore, it is particularly urgent and necessary to find new, low-pollution or non-pollution building heating heat sources.
发明内容 Contents of the invention
本发明的目的在于克服已有技术的不足，提供一种可以提高一次能源的利用效率，减少供热燃煤消耗量和环境污染的低温工业冷却循环水余热与区域集中供热联合方法。The purpose of the present invention is to overcome the deficiencies of the prior art and provide a combined method of low-temperature industrial cooling circulating water waste heat and regional centralized heating that can improve the utilization efficiency of primary energy, reduce heating coal consumption and environmental pollution.
本发明的低温工业冷却循环水余热与区域集中供热联合方法，它包括以下步骤：The low-temperature industrial cooling circulating water waste heat of the present invention and district centralized heating combined method, it comprises the following steps:
(1)20-30℃的低温工业冷却循环水，由循环泵送入水源热泵机组的蒸发器中，放出热量后返回到工业生产流程中作为冷却水继续使用；(1) The low-temperature industrial cooling circulating water at 20-30°C is sent into the evaporator of the water source heat pump unit by the circulating pump, and after releasing heat, it returns to the industrial production process and continues to be used as cooling water;
(2)一次管网中40-50℃的采暖热水进入水源热泵的冷凝器中，吸收热量后升高到60-70℃的水一部分进入第一换热装置换热后降温至40-50℃后返回冷凝器同时A类热用户二次供热管网中的第一管道水经第一换热装置换热升温至60-65℃后，再由燃气调峰锅炉将第一管道水加热到70-75℃供A类热用户采暖，第一管道水经散热后降低到40-45℃，再返回第一换热装置吸热后温度再升高到60-65℃，再经燃气调峰锅炉加热到70-75℃重新进入A类热用户采暖从而构成二次网热水循环；另一部分温度为60-70℃的水与B类热用户二次供热管网中的管道水换热后降温至35-45℃后返回冷凝器同时B类热用户二次供热管网中的第二管道水的温度经换热后升温至45-55℃直接供B类热用户采暖，第二管道水在室内经散热后降低到35-45℃再返回到第二换热装置换热，形成二次网热水循环。(2) The heating hot water at 40-50°C in the primary pipe network enters the condenser of the water source heat pump, and part of the water that rises to 60-70°C after absorbing heat enters the first heat exchange device for heat exchange and then cools down to 40-50°C After returning to the condenser after ℃, the water in the first pipeline in the secondary heating pipe network of Class A heat users is heated to 60-65℃ by the first heat exchange device, and then the water in the first pipeline is heated by the gas-fired peak-shaving boiler 70-75°C is used for heating by Class A heat users. The water in the first pipeline is cooled to 40-45°C after heat dissipation, and then returns to the first heat exchange device to absorb heat, and then the temperature rises to 60-65°C, and then adjusted by gas The peak boiler is heated to 70-75°C and re-enters the heating of Class A heat users to form a secondary network hot water cycle; the other part of water with a temperature of 60-70°C is exchanged with the pipe water in the secondary heating pipe network of Class B heat users After heating, the temperature is lowered to 35-45°C and then returned to the condenser. At the same time, the temperature of the water in the second pipeline in the secondary heating pipe network of Class B heat users is raised to 45-55°C after heat exchange and directly supplied to Class B heat users for heating. The water in the second pipeline is cooled to 35-45°C after cooling indoors, and then returns to the second heat exchange device for heat exchange, forming a secondary network hot water cycle.
本发明的优点：利用低温工业余热与集中供热联合系统可以将目前直接排放到环境中的低温工业余热转换为可以被热用户采暖直接利用的较高温度的热源，从而提高工业企业的能源利用效率，减少燃煤等一次能源的消耗量和对环境的污染物排放量。The advantages of the present invention: the combined system of low-temperature industrial waste heat and centralized heating can convert the low-temperature industrial waste heat directly discharged into the environment into a higher-temperature heat source that can be directly used by heat users for heating, thereby improving the energy utilization of industrial enterprises Efficiency, reducing the consumption of primary energy such as coal and the emission of pollutants to the environment.
附图说明 Description of drawings
附图是本发明的低温工业冷却循环水余热与区域集中供热联合系统的结构示意图。The accompanying drawing is a structural schematic diagram of the combined system of low-temperature industrial cooling circulating water waste heat and regional centralized heating of the present invention.
具体实施方式 Detailed ways
下面结合附图和具体实施例对本发明进行详细描述。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
如附图所示本发明的低温工业冷却循环水余热与区域集中供热联合方法，它包括以下步骤：(1)20-30℃的低温工业冷却循环水，由循环泵送入水源热泵机组的蒸发器中，放出热量后返回到工业生产流程中作为冷却水继续使用；(2)一次管网中40-50℃的采暖热水进入水源热泵的冷凝器中，吸收热量后升高到60-70℃的水一部分进入第一换热装置换热后降温至40-50℃后返回冷凝器同时A类热用户二次供热管网中的第一管道水经第一换热装置换热升温至60-65℃后，再由燃气调峰锅炉将第一管道水加热到70-75℃供A类热用户采暖，第一管道水经散热后降低到40-45℃，再返回第一换热装置吸热后温度再升高到60-65℃，再经燃气调峰锅炉加热到70-75℃重新进入A类热用户采暖从而构成二次网热水循环；另一部分温度为60-70℃的水与B类热用户二次供热管网中的管道水换热后降温至35-45℃后返回冷凝器同时B类热用户二次供热管网中的第二管道水的温度经换热后升温至45-55℃直接供B类热用户采暖，第二管道水在室内经散热后降低到35-45℃再返回到第二换热装置换热，形成二次网热水循环。As shown in the accompanying drawings, the low-temperature industrial cooling circulating water waste heat of the present invention combined with regional central heating comprises the following steps: (1) 20-30°C low-temperature industrial cooling circulating water is sent into the water source heat pump unit by a circulating pump In the evaporator, after releasing heat, it returns to the industrial production process and continues to be used as cooling water; (2) The heating hot water at 40-50°C in the primary pipe network enters the condenser of the water source heat pump, and rises to 60-60°C after absorbing heat Part of the water at 70°C enters the first heat exchange device for heat exchange and then cools down to 40-50°C and then returns to the condenser. At the same time, the water in the first pipeline in the secondary heating pipe network of Class A heat users passes through the first heat exchange device to heat up. After reaching 60-65°C, the gas-fired peak-shaving boiler will heat the water in the first pipeline to 70-75°C for heating for Class A heat users. After the heating device absorbs heat, the temperature rises to 60-65°C, and then it is heated to 70-75°C by the gas-fired peak-shaving boiler and re-enters the heating of Class A heat users to form a secondary network hot water cycle; the temperature of the other part is 60-70°C The water at ℃ exchanges heat with the pipe water in the secondary heating pipe network of Class B heat users, then cools down to 35-45°C and then returns to the condenser. At the same time, the temperature of the second pipe water in the secondary heat supply pipe network of Class B heat users After heat exchange, the temperature rises to 45-55°C and is directly supplied to Class B heat users for heating. The water in the second pipeline is cooled to 35-45°C after cooling indoors and then returns to the second heat exchange device for heat exchange, forming a secondary network of hot water cycle.
作为本发明方法的一种装置实现方式如图所示，该装置包括：(1)余热提取装置1；(2)一个包括节流阀、压缩机、冷凝器和蒸发器的水源热泵机组2，所述的水源热泵机组的蒸发器的热水进口通过第一管路与余热提取装置的出水口相连，所述的水源热泵机组的蒸发器的热水出口通过其上装有第一循环泵的第二管路与余热提取装置的回水口相连；(3)第一换热装置3-1和第二换热装置3-2，所述的水源热泵机组的冷凝器的出水口通过其上装有第二循环泵4-2的第三管路与第一换热装置3-1的管程进口相连，所述的第一换热装置的管程出口通过其上装有第三循环泵4-3的第四管路与水源热泵机组的冷凝器的进水口相连，第五管路的一端与位于第二循环泵4-2出口端的所述的第三管路相连通设置并且第五管路另一端与第二换热装置3-2的管程入口端相连，其上装有第四泵4-4的第六管路的一端与位于第三循环泵4-3出口端的所述的第四管路相连通设置并且第六管路另一端与第二换热装置的管程出口端相连；所述的第一换热装置的壳程出口与其上安装有第一阀的第一供热出水管路的一端相连，所述的第一换热装置的壳程进口与其上安装有第五循环泵4-5的第一供热回水管路的一端相连，在所述的第一供热出水管路和供热回水管路之间连接有多个采用明装散热器采暖的A类热用户7-1，在位于第一阀的进水口以及多个A类热用户之间的第一供热出水管路上并联设置有其上依次安装有第二阀、燃气调峰锅炉5以及第三阀的管路；所述的第二换热装置3-2的壳程出口与第二供热出水管路的一端相连，所述的第二换热装置的壳程进口与其上安装有第六循环泵4-6的第二供热回水管路的一端相连，在所述的第二供热出水管路和第二供热回水管路之间连接有多个采用辐射地板采暖的B类热用户7-2。所述的水源热泵机组2在市场有售。As a device implementation of the method of the present invention, as shown in the figure, the device includes: (1) a waste heat extraction device 1; (2) a water source heat pump unit 2 including a throttle valve, a compressor, a condenser and an evaporator, The hot water inlet of the evaporator of the water source heat pump unit is connected to the water outlet of the waste heat extraction device through the first pipeline, and the hot water outlet of the evaporator of the water source heat pump unit is connected through the first circulating pump on which the first circulation pump is installed. The second pipeline is connected to the water return port of the waste heat extraction device; (3) the first heat exchange device 3-1 and the second heat exchange device 3-2, and the water outlet of the condenser of the water source heat pump unit passes through the first heat exchange device 3-2. The third pipeline of the second circulation pump 4-2 is connected to the tube-side inlet of the first heat exchange device 3-1, and the tube-side outlet of the first heat exchange device passes through the tube side outlet of the third circulation pump 4-3 on it. The fourth pipeline is connected to the water inlet of the condenser of the water source heat pump unit, one end of the fifth pipeline is connected to the third pipeline at the outlet end of the second circulation pump 4-2, and the other end of the fifth pipeline is It is connected to the tube-side inlet port of the second heat exchange device 3-2, on which one end of the sixth pipeline of the fourth pump 4-4 is connected with the fourth pipeline located at the outlet end of the third circulating pump 4-3 The other end of the sixth pipeline is connected to the outlet end of the tube side of the second heat exchange device; the shell side outlet of the first heat exchange device is connected to the first heating outlet pipeline on which the first valve is installed The shell-side inlet of the first heat exchange device is connected to one end of the first heat supply and return water pipeline on which the fifth circulation pump 4-5 is installed. In the first heat supply water outlet pipeline There are multiple A-type heat users 7-1 connected to the heat supply and return water pipeline, and the first heat supply outlet between the water inlet of the first valve and the multiple A-type heat users A pipeline on which the second valve, the gas-fired peak-shaving boiler 5 and the third valve are installed in parallel on the water pipeline; the shell-side outlet of the second heat exchange device 3-2 and the second heating outlet pipeline The shell-side inlet of the second heat exchange device is connected to one end of the second heat supply and return water pipeline on which the sixth circulation pump 4-6 is installed. In the second heat supply water outlet pipeline There are a plurality of Class B heat users 7-2 using radiant floor heating connected to the second heat supply and return water pipeline. The water source heat pump unit 2 is available on the market.
余热提取装置的主要作用是从工业余热中提取热量；水源热泵的作用是通过逆卡诺循环利用低温余热的热量制取高温热水；换热装置的作用是将一次网热水的热量交换到二次网的热水；循环泵的作用是为采暖热水的循环提供动力；燃气调峰锅炉的作用是为了满足部分热用户对较高热水的需求，热用户为采暖系统的组成部分。The main function of the waste heat extraction device is to extract heat from industrial waste heat; the function of the water source heat pump is to use the heat of low-temperature waste heat to produce high-temperature hot water through the reverse Carnot cycle; the function of the heat exchange device is to exchange heat from the primary network hot water to The hot water of the secondary network; the function of the circulation pump is to provide power for the circulation of heating hot water; the function of the gas-fired peak-shaving boiler is to meet the needs of some heat users for higher hot water, and the heat users are an integral part of the heating system.
实施例1Example 1
(1)25℃的低温工业冷却循环水，由循环泵送入水源热泵机组的蒸发器中，放出热量后返回到工业生产流程中作为冷却水继续使用；(2)一次管网中45℃的采暖热水进入水源热泵的冷凝器中，吸收热量后升高到65℃的水一部分进入第一换热装置换热后降温至45℃后返回冷凝器同时A类热用户二次供热管网中的第一管道水经第一换热装置换热升温至62℃后，再由燃气调峰锅炉将第一管道水加热到72℃供A类热用户采暖，第一管道水经散热后降低到42℃，再返回第一换热装置吸热后温度再升高到62℃，再经燃气调峰锅炉加热到72℃重新进入A类热用户采暖从而构成二次网热水循环；另一部分温度为65℃的水与B类热用户二次供热管网中的管道水换热后降温至40℃后返回冷凝器同时B类热用户二次供热管网中的第二管道水的温度经换热后升温至50℃直接供B类热用户采暖，第二管道水在室内经散热后降低到40℃再返回到第二换热装置换热，形成二次管网热水循环。(1) Low-temperature industrial cooling circulating water at 25°C is sent to the evaporator of the water source heat pump unit by a circulating pump, and after releasing heat, it is returned to the industrial production process for continued use as cooling water; (2) 45°C in the primary pipe network Heating hot water enters the condenser of the water source heat pump, and part of the water that rises to 65°C after absorbing heat enters the first heat exchange device for heat exchange, then cools down to 45°C, and then returns to the condenser. After the water in the first pipeline is heated up to 62°C by the first heat exchange device, the water in the first pipeline is heated to 72°C by the gas-fired peak-shaving boiler for heating for Class A heat users, and the water in the first pipeline decreases after heat dissipation to 42°C, and then return to the first heat exchange device to absorb heat, then the temperature rises to 62°C, and then heated to 72°C by the gas-fired peak-shaving boiler and re-enters Class A heat users for heating to form a secondary network hot water cycle; the other part The water with a temperature of 65°C exchanges heat with the pipe water in the secondary heating pipe network of Class B heat users and then cools down to 40°C and then returns to the condenser. After heat exchange, the temperature rises to 50°C and is directly supplied to Class B heat users for heating. The water in the second pipeline is cooled to 40°C after cooling indoors and then returns to the second heat exchange device for heat exchange, forming a secondary pipe network hot water cycle.
在总供热面积438.93万平方米的项目投产后，每个供暖季的总共热量约为1700525GJ，利用工业余热1204847GJ。与直接燃煤供热相比，一次能源利用率高达146％，相当于每年节约标准煤41110吨，同时节水296092吨/年，减少CO2排放107708吨/年，减少SO2排放987吨/年，减少NOx排放373吨/年。After the project with a total heating area of 4.3893 million square meters is put into operation, the total heat in each heating season is about 1,700,525GJ, and the industrial waste heat is 1,204,847GJ. Compared with direct coal-fired heating, the primary energy utilization rate is as high as 146%, which is equivalent to saving 41,110 tons of standard coal per year, saving 296,092 tons/year of water, reducing CO2 emissions by 107,708 tons/year, and reducing SO2 emissions by 987 tons/year year, reducing NOx emissions by 373 tons/year.
实施例2Example 2
(1)20℃的低温工业冷却循环水，由循环泵送入水源热泵机组的蒸发器中，放出热量后返回到工业生产流程中作为冷却水继续使用；(2)一次管网中40℃的采暖热水进入水源热泵的冷凝器中，吸收热量后升高到60℃的水一部分进入第一换热装置换热后降温至40℃后返回冷凝器同时第一换热装置中的A类热用户二次供热管网中的第一管道水经换热升温至60℃后，再由燃气调峰锅炉将第一管道水加热到70℃供A类热用户采暖，第一管道水经散热后降低到40℃，再返回第一换热装置吸热后温度再升高到60℃，再经燃气调峰锅炉加热到70℃重新进入A类热用户采暖从而构成二次网热水循环；另一部分温度为60℃的水与B类热用户二次供热管网中的管道水换热后降温至35℃后返回冷凝器同时B类热用户二次供热管网中的第二管道水的温度经换热后升温至45℃直接供B类热用户采暖，第二管道水在室内经散热后降低到35℃再返回到第二换热装置换热，形成二次管网热水循环。(1) Low-temperature industrial cooling circulating water at 20°C is sent to the evaporator of the water source heat pump unit by a circulating pump, and after releasing heat, it is returned to the industrial production process for continued use as cooling water; (2) 40°C in the primary pipe network Heating hot water enters the condenser of the water source heat pump, and part of the water that rises to 60°C after absorbing heat enters the first heat exchange device for heat exchange, then cools down to 40°C, and then returns to the condenser. At the same time, the A-type heat in the first heat exchange device After the water in the first pipe in the user's secondary heating pipe network is heated up to 60°C by heat exchange, the water in the first pipe is heated to 70°C by the gas-fired peak-shaving boiler for heating for Class A heat users, and the water in the first pipe is heated by heat dissipation After that, it is lowered to 40°C, and then returned to the first heat exchange device to absorb heat, and then the temperature rises to 60°C, and then heated to 70°C by the gas-fired peak-shaving boiler, and then enters the A-type heat user for heating to form a secondary network hot water cycle; The other part of water with a temperature of 60°C exchanges heat with the pipe water in the secondary heating pipe network of Class B heat users, then cools down to 35°C and returns to the condenser. At the same time, the second pipe in the secondary heat supply pipe network of Class B heat users The temperature of the water rises to 45°C after heat exchange and is directly supplied to Class B heat users for heating. The water in the second pipe is cooled to 35°C after cooling indoors and then returns to the second heat exchange device for heat exchange to form hot water in the secondary pipe network. cycle.
在总供热面积200万平方米的项目投产后，每个供暖季的总共热量约为772960GJ，利用工业余热547657GJ。与直接燃煤供热相比，一次能源利用率高达140％，相当于每年节约标准煤18686吨，同时节水134584吨/年，减少CO2排放48953吨/年，减少SO2排放448吨/年，减少NOx排放169吨/年。After the project with a total heating area of 2 million square meters is put into operation, the total heat in each heating season is about 772,960GJ, and the industrial waste heat is 547,657GJ. Compared with direct coal-fired heating, the primary energy utilization rate is as high as 140%, which is equivalent to saving 18,686 tons of standard coal per year, saving 134,584 tons/year of water, reducing CO2 emissions by 48,953 tons/year, and reducing SO2 emissions by 448 tons/year year, reducing NOx emissions by 169 tons/year.
实施例3Example 3
(1)30℃的低温工业冷却循环水，由循环泵送入水源热泵机组的蒸发器中，放出热量后返回到工业生产流程中作为冷却水继续使用；(2)一次管网中50℃的采暖热水进入水源热泵的冷凝器中，吸收热量后升高到70℃的水一部分进入第一换热装置换热后降温至50℃后返回冷凝器同时A类热用户二次供热管网中的第一管道水经第一换热装置换热升温至65℃后，再由燃气调峰锅炉将第一管道水加热到75℃供A类热用户采暖，第一管道水经散热后降低到45℃，再返回第一换热装置吸热后温度再升高到65℃，再经燃气调峰锅炉加热到75℃重新进入A类热用户采暖从而构成二次网热水循环；另一部分温度为70℃的水与B类热用户二次供热管网中的管道水换热后降温至45℃后返回冷凝器同时B类热用户二次供热管网中的第二管道水的温度经换热后升温至55℃直接供B类热用户采暖，第二管道水在室内经散热后降低到45℃再返回到第二换热装置换热，形成二次管网热水循环。(1) Low-temperature industrial cooling circulating water at 30°C is sent to the evaporator of the water source heat pump unit by a circulating pump, and after releasing heat, it is returned to the industrial production process as cooling water for continued use; (2) 50°C in the primary pipe network The hot water for heating enters the condenser of the water source heat pump, and part of the water that rises to 70°C after absorbing heat enters the first heat exchange device for heat exchange, then cools down to 50°C and then returns to the condenser. After the water in the first pipeline is heated up to 65°C by the first heat exchange device, the water in the first pipeline is heated to 75°C by the gas-fired peak-shaving boiler for heating for Class A heat users, and the water in the first pipeline decreases after heat dissipation to 45°C, and then return to the first heat exchange device to absorb heat, then the temperature rises to 65°C, and then heated to 75°C by the gas-fired peak-shaving boiler, and then re-enters Class A heat users for heating to form a secondary network hot water cycle; the other part The water with a temperature of 70°C exchanges heat with the pipe water in the secondary heating pipe network of Class B heat users, then cools down to 45°C and then returns to the condenser. After heat exchange, the temperature rises to 55°C and is directly supplied to Class B heat users for heating. The water in the second pipe is cooled to 45°C after cooling indoors and then returns to the second heat exchange device for heat exchange, forming a secondary pipe network hot water cycle.
在总供热面积350万平方米的项目投产后，每个供暖季的总共热量约为1502361GJ，利用工业余热1102336GJ。与直接燃煤供热相比，一次能源利用率高达152％，相当于每年节约标准煤37612吨，同时节水26617吨/年，减少CO2排放94030吨/年，减少SO2排放940吨/年，减少NOx排放338吨/年。After the project with a total heating area of 3.5 million square meters is put into operation, the total heat in each heating season is about 1,502,361GJ, and 1,102,336GJ of industrial waste heat is utilized. Compared with direct coal-fired heating, the primary energy utilization rate is as high as 152%, which is equivalent to saving 37,612 tons of standard coal per year, saving 26,617 tons/year of water, reducing CO2 emissions by 94,030 tons/year, and reducing SO2 emissions by 940 tons/year year, reducing NOx emissions by 338 tons/year.
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| CN103185332B (en) * | 2012-10-08 | 2015-03-11 | 哈尔滨工大金涛科技股份有限公司 | Water-to-steam heating method and steam direct-heating machine |
| CN103017230B (en) * | 2012-12-05 | 2016-01-20 | 大连优力特换热设备制造有限公司 | Two for heat-exchange unit |
| CN103256756A (en) * | 2013-05-31 | 2013-08-21 | 锦西天然气化工有限责任公司 | Chemical industry device circulating water cooling, low-grade heat energy utilization and water saving system and method |
| CN104949184B (en) * | 2015-07-06 | 2018-01-23 | 珠海格力电器股份有限公司 | Water waste heat recovery heating system and water waste heat recovery heating method |
| CN108072088B (en) * | 2016-11-15 | 2024-05-14 | 长春中安鸿程伟业节能科技有限公司 | Peak regulating system of electric heating pump of central heating secondary network |
| CN108930996B (en) * | 2017-05-22 | 2024-03-26 | 山西三合盛智慧科技股份有限公司 | Multi-energy complementary heat supply system and heat supply method for energy cascade utilization |
| CN109631131B (en) * | 2018-12-21 | 2020-07-07 | 哈尔滨工业大学 | Central heating system based on thermal radiation transmission pipe |
| CN111981552B (en) * | 2020-05-22 | 2021-12-14 | 太原大四方节能环保股份有限公司 | Heat pump and gas boiler combined heating system and regulation and control method thereof |
| CN113091122B (en) * | 2021-05-11 | 2022-05-20 | 浙江英集动力科技有限公司 | A kind of control method of supplementary combustion type building heat exchange unit |
| CN113757772A (en) * | 2021-09-22 | 2021-12-07 | 孟伟 | Multi-heat-source complementary heating system and method |
| CN119412318B (en) * | 2024-11-25 | 2025-10-31 | 机械工业第六设计研究院有限公司 | Method for improving utilization rate of waste heat of air compressor |
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