1. The scope of technical application is applicable to the energy-saving technical transformation of distillation process in chemical, petrochemical, light industry, pharmaceutical and other industries. 2. Technical principle and process self regenerative distillation energy saving technology (shrt) is to compress the low-temperature steam on the top of the distillation system through the compressor, increase its temperature and pressure, and then send it to the reboiler to heat the tower kettle liquid and release heat for condensation. The system operates only through the compressor to maintain the energy balance of the distillation process, and the system uses a small amount of electric energy to improve the thermal grade of the steam on the top of the tower, The latent heat of vaporization of the overhead steam is efficiently recovered, the external energy demand for the heating of the tower kettle liquid is reduced, the overhead cooling water consumption is reduced, and the energy-saving and economic operation of the distillation process is realized. The energy consumption is only 60% ~ 80% of that of the traditional distillation process. The process schematic diagram is as follows: the first preheater and the second preheater of compressor distillation tower 3 Technical index (1) power consumption per ton of methanol compressed by steam compressor: ≤ 60 kwh, flow: 120 ~ 7000 m3 / min, pressure ratio range of 2 ~ 8. (2) The heat transfer coefficient (k value) of reboiler is more than 20% higher than that of traditional reboiler (thermosyphon). 4. Technical functional characteristics (1) direct compression self regenerative distillation system and indirect self regenerative distillation system can be developed and designed according to different distillation systems and distillation purity requirements. (2) A horizontal tube falling film reboiler with small temperature difference suitable for distillation was designed and developed, and the structure and process matching mode of the heat exchanger were optimized. (3) Equipped with intelligent measurement and control system, the operating frequency and other parameters of the system compressor can be remotely configured, monitored and controlled. (4) The original overhead condenser and connecting pipeline are retained and used as standby with the newly modified self regenerative distillation circuit, which enhances the reliability of system operation. 5. Application case: Nantong TALIDA self regenerative distillation project. The technology provider is Jiangsu LECO Energy Saving Technology Co., Ltd. (1) Brief description of the user's energy consumption: the total feed volume of ethanol distillation of Nantong TALIDA project is 7.3m3/h. The original system adopts the conventional atmospheric distillation system, with the tower kettle temperature of 103.5 ℃ and the tower top of 79.5 ℃. The original system consumes 3.5t/h of steam (equivalent to 45.6kg/m3 of standard coal) and 150m3 / h of cooling water, resulting in a large waste of energy. (2) Implementation content and cycle: the direct compression self regenerative distillation technology is adopted to carry out energy-saving transformation of the distillation system, the overhead condenser of the original system is cancelled, and the high-efficiency twin-screw compressor (installed power 250 kW) is used to compress and warm the overhead steam to 108 ℃ (saturation temperature). The heated steam is used to heat the tower kettle materials, and the steam condensate preheating system is fed, The tower kettle reboiler adopts a horizontal tube falling film reboiler with an area of 425 square meters. The implementation cycle is 4 months. (3) Energy saving and emission reduction effect and investment payback period: after the transformation, the system saves steam by 66.67%, the power consumption of the new compressor is 36.8 kwh / m3, and the energy consumption of the system is equivalent to 27.4 kg / m3 of standard coal, reducing 18.2 kg of standard coal / m3. The production system operates for about 2 / 3 of a year, saving 061000 tons of standard coal and reducing CO2 emission by 20 170000 tons. The payback period is 1.5 years. 6. Promotion prospect and potential of energy conservation and emission reduction in the next three years. It is expected that the proportion of promotion and application will reach 3% in the next three years, which can save 1.3 million tons of standard coal and reduce co2360.3 million tons per year 10000 tons. （2） Heating industrial waste heat utilization technology 1 The scope of application of the technology is applicable to the technical transformation of industrial waste heat utilization and energy saving. 2. The technical principle and process take the second type of lithium bromide absorption heat pump as the main equipment and is driven by medium temperature heat source. The evaporation pressure and absorption pressure in the heat pump cycle are higher than the generation pressure and condensation pressure. With the help of its potential difference with low-temperature heat source, it can absorb low-grade waste heat (hot water, steam or other media) and raise another part of medium temperature heat to a higher temperature, Produce high-grade hot steam or hot water to improve the grade of energy. The purpose of this kind of heat pump is to obtain higher output temperature. Because it discharges some heat to the environment or low-temperature heat source, its performance coefficient cop is generally less than 1, between 0.3 and 0.5. Only a small amount of electric energy is consumed during the operation of the system, which has a significant energy-saving effect. The technical roadmap is as follows: 3 Technical index (1) medium temperature waste heat above 70 ℃ can be recycled. (2) Single stage heating can provide hot water or saturated steam with a temperature 30 ~ 40 ℃ higher than that of waste heat source but no more than 150 ℃, and the energy efficiency is 0.45 ~ 0.48. (3) The two-stage heating can provide hot water or saturated steam whose temperature is 40 ~ 60 ℃ higher than that of waste heat source, but not more than 175 ℃, and the energy efficiency is 0.3. 4. Technical functional characteristics (1) the control parameters and operation of the unit have remote monitoring function. (2) based on the "Internet plus" monitoring platform, data collection, sorting and publishing are carried out through the Internet. 5. Application case: CNOOC Ningbo Daxie Petrochemical 300000 t / a ethylbenzene unit process hot water waste heat recovery project. The technology provider is Beijing Huayuan taimeng energy saving equipment Co., Ltd. (1) A brief description of the user's energy consumption: the cooling of high-temperature materials in the 300000 ton ethylbenzene plant produces a large amount of hot water, with a temperature of 120 ℃ and a total amount of 468.4 tons / hour, which directly enters the cooling tower for heat dissipation, resulting in great waste. (2) Implementation content and cycle: install class II heat pump unit to recover the hot water waste heat of ethylbenzene process unit, use 120 ℃ hot water as the driving heat source to produce 0.30 MPa (gauge pressure) steam, which is incorporated into 0.25 MPa (gauge pressure) steam pipe network. The implementation cycle is 2 months. (3) Energy saving: 1400 T / h of steam and recovery effect after reconstruction: 3.5 MPa / h. The annual operation time of the equipment is calculated as 8000 hours, with an annual saving of 90000 tons of standard coal and an annual emission reduction of CO2 of 22.5% 490000 tons. The payback period is 10 months. 6. Promotion prospect and potential of energy conservation and emission reduction in the next three years. It is expected that the proportion of promotion and application will reach 5% in the next three years, which can save 100000 tons of standard coal and reduce co227.5 tons per year 720000 tons. （3） Cogeneration low energy heating technology based on cascade utilization of thermal energy 1 The scope of application of the technology is applicable to the energy-saving technical transformation of large-scale domestic heating in thermal power plants. 2. Technical principle and process use the low-grade heat energy demand of residents' heating to transform the key equipment such as low-pressure cylinder rotor and condenser of steam turbine. During the heating period, the operating back pressure of the unit shall be appropriately increased. The circulating water of the heat supply network shall be used as the steam exhaust cooling water of the unit, and the waste heat of the low-grade steam exhaust of the unit shall be recovered as the basic heat source of the heat supply network. After heating the circulating return water, the external heating shall be conducted. The insufficient part of the heating shall be heated by the high-grade middle exhaust steam extraction for peak heating, so as to realize the cascade utilization of energy, improve the power generation output of the unit and significantly reduce the cost of heating energy consumption. The cascade low energy heating system of air cooling unit and wet cooling unit is shown in the figure below. 3. Technical index (1) compared with traditional extraction heating, the heating capacity of the unit is increased by more than 40%, and the power generation output of the unit is increased by more than 5%. (2) The coal consumption of generating units can be reduced to less than 150g / kWh. 4. The technical functional characteristics realize waste heat recovery and effectively release the heating capacity of cogeneration unit. 5. Application case: heating and energy saving transformation project of unit 1 of thermal power plant in Dalian Development Zone of Guodian power. The technology provider is Guoneng Longyuan Lantian Energy Saving Technology Co., Ltd. (1) Brief description of energy consumption of users: two 350 MW supercritical cogeneration units adopt medium exhaust steam extraction for heating, the actual steam extraction capacity of a single unit is 490 tons / hour, and the maximum heating area of the power plant is 1145 square meters. (2) Implementation content and cycle: comprehensively considering the heating load of the power plant, coal consumption rate of power generation, load rate in non heating period, 㶲 loss and other conditions, the transformation scheme of "wide back pressure low-pressure cylinder rotor" is adopted. The new rotor can adapt to the high back pressure heating conditions in heating period, and can also take into account the economy of pure condensation operation in non heating period. During heating period, the exhaust steam of main engine and small turbine of unit 1 are recovered together It is used as the basic heat source of the heat supply network to heat the circulating water of the heat supply network. In the non heating period, the cooling water in the re condenser is replaced with circulating cooling water. The implementation cycle is 1 year. (3) Energy saving and emission reduction effect and investment payback period: after the transformation, the thermal load of the unit can reach 490 MW, the design heating area of the power plant can reach 16 million square meters, the heating capacity of the unit increases by 31.6%, the power generation output increases by 11.4%, and the coal consumption for power generation decreases by 105.9 g / kWh. Based on the calculation of 870 million kwh generated by the unit during the heating period, 92000 tons of standard coal will be saved and co225.5 million tons of CO2 will be reduced annually 50000 tons. The comprehensive annual benefit of the project is 92.1 million yuan, the total investment is 276 million yuan, and the investment payback period is 3 years. 6. Promotion prospect and energy conservation and emission reduction potential in the next three years. It is expected that the proportion of promotion and application can reach 25% in the next three years, which can save 810000 tons of standard coal and reduce CO2 emission by 2224 million tons per year 370000 tons. （4） Large cavity high temperature vacuum electrothermal nitriding sintering system and waste heat utilization technology 1 The scope of application of the technology is applicable to the energy-saving technical transformation in the field of silicon carbide ceramic product preparation technology. 2. The technical principle and process adopt high-strength and large cavity furnace, with excellent vacuum degree, sealing and thermal insulation design, large product loading capacity, reduce the layered temperature difference in the furnace by using the jet temperature equalizing system at high temperature, high nitriding rate, full recovery and utilization of waste heat and high heat utilization rate; At the same time, through the combination of industrial DCS control system and industrial configuration software, the intelligent control functions of large cavity nitriding furnace such as heating and heating, blast cooling, air supply and impurity removal, jet uniform temperature, automatic nitrogen supplement and waste heat utilization are realized. The unit ton consumption is low. Compared with the industry advanced indicators, it saves 250 kwh / ton of electricity and 55 m3 / ton of nitrogen (standard state). The technical schematic diagram is as follows: 1-high strength steel structure furnace body, 2-water cooling sealing electrode, 3-floating anchor masonry insulation layer, 4-jet temperature equalizing system, 5-multi row electric heating device, 6-high pressure nitrogen preheating and air supply pipeline, 7-silicon nitride combined with silicon carbide products, 8-kiln pressure high and low pressure control system, 9-heavy duty movable furnace truck, 10-smoke exhaust and flue gas regulation control system, 11 - waste heat utilization system of clean flue gas, 12 - impurity flue gas purification and treatment system 3 Technical indicators (1) the effective loading volume is 23 cubic meters and the loading capacity is 30 tons. (2) The maximum service temperature is 1450 ℃, and the temperature uniformity is ± 5 ℃. (3) Use pressure range ± 0.1 MPa. (4) The power consumption is 850 kwh / T, and the nitrogen consumption is 20 ~ 30 m3 / T (standard state). (5) The production cycle (cold to cold) is about 10 days. 4. Technical functional characteristics (1) high temperature, high pressure and high vacuum, good temperature uniformity and high nitriding efficiency. (2) Large loading capacity, low consumption per ton, efficient utilization of waste heat and high heat utilization rate. (3) Combination of automatic intelligent control and network collaborative operation and maintenance services. 5. Application case: the project of Sinosteel refractory Tianzhu Yutong science and technology new materials Co., Ltd., and the technology provider is the Sixth Design and Research Institute Co., Ltd. of machinery industry. (1) Brief description of user's energy consumption: the total installed capacity of nitriding equipment is 7500kw, and the total annual power consumption of the whole plant is 14 million kwh, including power for nitrogen production. (2) Implementation content and cycle: Transform ten nitriding furnaces into 23 m3 large cavity nitriding sintering furnace system + Intelligent utilization of waste heat. The implementation cycle is 10 months. (3) Energy saving and emission reduction effect and investment payback period: after the transformation, the annual output is 10500 tons, the average power saving of the system is 250 kwh / ton, the average nitrogen saving is 55 m3 / ton (standard state), the annual standard coal saving is 079000 tons, and the annual emission reduction of co20 220000 tons. The new output of the project is 7800 tons, the new benefit is 21.06 million yuan, the total investment is 19.8 million yuan, and the investment payback period is 11 months. 6. Promotion prospect and potential of energy conservation and emission reduction in the next three years. It is expected that the proportion of promotion and application will reach 3% in the next three years, which can save 2300 tons of standard coal and reduce CO2 emission by 20 million tons per year 6.37 million tons. （5） Sludge coupling power generation technology 1 The scope of application of the technology is applicable to the waste heat and residual pressure energy-saving technical transformation of sludge and other solid waste treatment. 2. The technical principle and process adopt low-temperature steam sludge drying equipment. The low-grade steam of the power plant is used to dry the sludge to improve the calorific value of the sludge. The dried tail gas is sent to the boiler of the power plant for thermal decomposition, and the latent heat of the dried tail gas is recycled. At the same time, it is ultra clean discharged after denitration, dust removal and desulfurization of the boiler tail gas, and the condensate is reused after biological treatment; Then the dried sludge is mixed with coal and sent to the boiler of the power plant for combustion. The combustion ash is used as the building auxiliary material. While harmlessly treating the sludge, it is coupled with power generation to realize resource utilization. The core equipment of sludge coupling power generation is low-temperature steam type high-efficiency sludge drying equipment and high humidity dust collector. The process flow chart is as follows: 3 Technical indicators (1) the single area of main equipment is 420 square meters. (2) The amount of dried sludge per unit area is 12.2kg/h (water content is 80%). (3) The power consumption of the main engine is 17.6 kwh / T. (4) Net steam heat consumption 1400 kJ / kg (water content 80%). 4. Technical functional characteristics (1) low temperature steam high-efficiency sludge dryer. The steam consumption of sludge drying is less than 0.5 tons, all sludge is recycled, the waste gas generated by sludge drying is ultra clean discharged, and the dried condensate is reused up to standard. (2) New water mist dust removal technology and equipment. Under high humidity conditions with relative humidity greater than 90%, the dust content of dried tail gas is less than 20 mg / m3. (3) Intelligent control and system control to realize unattended operation on site. 5. Application case: comprehensive utilization project of sludge coupling power generation in thermal power plant of Nanjing Chemical Industry Park. The technology provider is China Power Environmental Protection Co., Ltd. (1) Brief description of energy consumption of users: the installed capacity is 300000 kW, and the first phase of thermal power plant is 2 × 50MW high-pressure double extraction condensing steam generator set, 3 sets of 220t / h high-temperature and high-pressure coal-fired boilers, supplying 10MPa steam of 30 ~ 40t / h, 4.3mpa steam of 100 ~ 150t / h and 1.4mpa steam of 270 ~ 360t / h. (2) Implementation content and cycle: build a new set of sludge treatment and disposal system, share the coal handling, boiler, environmental protection and other facilities of the thermal power plant in the chemical park, adopt the sludge "indirect drying + coupled power generation" treatment method, collect and treat all the generated wastewater, discharge it to the Binjiang sewage plant after reaching the standard, and send the waste gas to the boiler of the power plant for incineration after treatment, All the produced dry sludge is sent to the power plant and burned for power generation after being mixed with coal. The implementation cycle is 10 months. (3) Energy saving and emission reduction effect and investment payback period: after the transformation, 100000 tons of sludge will be treated annually. After drying, the available calorific value of sludge will be calculated according to 1500 kcal (1 kcal = 4.1868 kJ), 6400 tons of standard coal will be saved annually and co2.1 million tons will be reduced annually 780000 tons. The total investment of the project is 65 million yuan. The sludge disposal fee is priced by ton, and the investment payback period is 5 years. 6. Promotion prospect and potential of energy conservation and emission reduction in the next three years. It is expected that the proportion of promotion and application can reach 51% in the next three years, which can save 100000 tons of standard coal and reduce co227.5 tons per year 70000 tons. （6） Key technology and application of efficient recovery and utilization of waste heat in automobile hub production line 1 The scope of technical application is applicable to the waste heat utilization and energy-saving technical transformation of vehicle hub production line. 2. The technical principle and process adopt the self-developed waste heat recovery and utilization system to recover the high, medium and low-temperature waste heat of the hub production line step by step. At the same time, the efficient extraction of low-grade waste heat of the hub production line and the dual supply technology of cold and heat are adopted to produce ultra-low temperature cold water (7 ~ 12 ℃) for cooling but recycling of the unit; Combined with energy control database and cloud platform, realize remote monitoring and debugging, energy consumption tracking, energy data sharing and other functions; At the same time, the low-temperature waste heat generator set using magnetic levitation technology converts the excess waste heat resources into electric energy, and the thermoelectric efficiency of the whole machine can reach 13%. The process flow chart is as follows: high temperature recovery unit high temperature process medium temperature recovery unit medium temperature process low temperature recovery unit low temperature process auxiliary facilities intelligent control system magnetic bearing generator set cooling water high temperature medium temperature low temperature heat high temperature 3