Condition of environment of Chinese the sources of energy is main the problem is specific power consumption pressure of tall, environment is great, world energy resources uses efficiency on average for 50.32% , and China is less than 40% , how extracting high-energy effect is the problem that we are badly in need of solving.
The trade that reduces air place application includes to be spun mechanical, car, electron, electric power, metallurgy, mining industry, building, building materials, oil, chemical industry, petrifaction, gently, each domains of the of all kinds industry such as environmental protection, war industry and civil production and life.
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Compress air to become one of the most extensive power sources in industrial domain, but good compresses air admirably to need to waste a large number of the sources of energy to character. In enterprise of mass type of production, compress airy the sources of energy to use up the 10% ～ that occupy full electric power to use up 35% . Investigate an analysis according to the industry, moving charge of 5 years forms pneumatics engine system in: 23% what earlier installation cost of the system and equipment safeguard charge to take total charge, electric energy is used up (charge of electricity) occupy 77% , among them the energy changeover of 15% is air potential energy, the energy changeover of 85% is heat energy, through wind cold or the means of water-cooling is discharged go in air.
This paper aims to discuss how to change lithium to draw type with bromine cold (lukewarm) water unit is reasonable and tie-in, form suit the system of utilization of waste heat with pneumatics engine energy-saving system, to the low temperature of pneumatics machine more than heat undertakes be usinged effectively, implementation raises the energy efficiency, goal that reduces contaminant discharge. Solve pneumatics machine more than heat reclaims, satisfy requirement of heating of summertime refrigeration winter at the same time, can bring tremendous benefit for the enterprise, implementation is energy-saving at the same time decrease a platoon.
1, normally pneumatics engine system is energy-saving means
If the quantity of heat of pneumatics machine is not discharged, the regular job that affects pneumatics engine, the influence reduces airy quality. Current, these quantity of heat of aircrew of great majority pneumatics are direct platoon dropt, wasted much heat energy not only, still can cause hot pollution. As these year energy-saving the demand that reduces a platoon, what manufacturer of aircraft of a few pneumatics rolled out him is energy-saving use means. But with respect to screw pneumatics machine, major way is to use heat exchanger to take heat, displacement is the mode that hot water outputs. But from use on for, can offer the switch that heat up heat only, realize heating to perhaps defend function of heat build-up water namely.
2, how to optimize pneumatics engine system energy-saving means?
2.1 bromine change lithium to absorb type aircrew introduction
The main principle that draws type refrigeration engine is to use water to be in what pressure evaporates to reduce the water imbibition that reachs the bromic solution that change lithium to come true below low pressure. Water falls in the pressure of 6mmhg, its evaporate temperature is 4 ℃ , absorb outside quantity of heat to achieve refrigeration goal when water evaporates, the water imbibition that the bromic solution that change lithium regards absorbefacient as to basically use its oneself makes sure aircrew interior keeps the pressure of 6mmhg. Main part has unit evaporator, absorb implement, condenser, second birth implement, if specific loop principle pursues 3.
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Bromine changes lithium to absorb type unit main characteristic is: It is motivation with all sorts of low character heat energy, and can reclaim use various low character heat energy, wait like medium of low-pressure vapour, hot water, flue gas, conduction oil, much constituent; Safe environmental protection, aircrew employs the bromic solution that change lithium to absorb fluid, water is refrigeration agent; Locomotive part is little, fragile little, care and maintenance is convenient, vibration is little, noise is low; Set a room the demand is low, can transform a circumstance to be placed neatly according to the project; Intelligence turns control, can realize a computer room unmanned management; But according to low character heat energy actual condition undertakes “ measures a body custom-built ” , achieve first-rate solution.
Bromine changes lithium to absorb type aircrew to basically be divided to draw type refrigeration machine is mixed absorb type to heat up pump, absorb type refrigeration machine to basically use second birth implement reclaim 60 ℃ above more than heat, make through evaporator take 5 ～ 30 ℃ cold water satisfies refrigeration requirement; Absorb type to heat up pump to basically use evaporator to reclaim 60
℃ is the following more than heat, through absorbing implement, condenser is made take hot water of 45 ℃ above to satisfy heat addition or craft requirement. Bromine changes lithium to absorb type aircrew to be able to reclaim all sorts of liquid state carrier more than heat and gaseous carrier more than heat, wait like gas of steam of water, conduction oil, flue gas, lack, much constituent.
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System of 2.2 pneumatics engine is energy-saving means and technical index
More than heat reclaims system to pneumatics machine more than heat undertakes reclaiming heating of summertime refrigeration, winter, implementation compresses heat beyond heat to reclaim, and the summer is made take cold quantity to be able to satisfy heating of craft cold demand, winter completely not only can satisfy plant area heating, still have very big have more than needed, but more than heat to the heating outside plant area, specific specification is as follows:
1) economic benefits is remarkable, the system invests ＜ of pay back period 2 years
The project of engine of pneumatics of fuel injection screw that is 4000kW with power is exemple, year economic charge of electricity 1.36 million yuan.
2) social benefit is distinct
The project of engine of pneumatics of fuel injection screw that is 4000kW with power is exemple, year economic vapour comparatives mark coal 2688 tons, CO2 decreases a platoon 6570 tons / year, SO2 decreases a platoon 197 tons / year, NOX decreases a platoon 98 tons / year.
Use case:
Some pharmacy company has 6 short for Shaanxi Province to beat centrifugal pneumatics unit, among them 7200kW of general power of 2 4 1000kW, 1600kW, medicinal powder hot means is water-cooled medicinal powder hot. Transform installation 6 pneumatics machine more than heat reclaims system and machine of pneumatics of form a complete set more than heat reclaims special refrigeration unit, reclaim heating of refrigeration of more than hot summer, winter.
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3, last word
This project is pneumatics machine to more than heat reclaims and offer solution of a complete set of, heat of the problem extraction heat that solves pneumatics machine, leak problem, caustic problem, liquidity problem, microtherm beyond reclaims and problem of technology of heating of summertime refrigeration, winter, heat exchange, implementation beyond heats up deepness to use, development system intelligence changes the crucial technology development such as control, the system controls a technology centrally, systematic executive monitoring, long-range visit, analysis, hold accuse.
This plan in pneumatics machine more than heat undertakes reclaiming and heating of summertime refrigeration, winter, be in Chinese banner level, use technology and contrast of main technique index, reach an industry banner level.
The place on put together is narrated, draw type through changing lithium with bromine cold (lukewarm) water unit is reasonable and tie-in, form suit the system of utilization of waste heat with pneumatics engine energy-saving system, implementation raises the energy efficiency, goal that reduces contaminant discharge. Solve pneumatics machine more than heat reclaims, satisfy requirement of heating of summertime refrigeration winter at the same time, can bring tremendous benefit for the enterprise, implementation is energy-saving at the same time decrease a platoon.
Bibliographical reference
[1] Wang Zhonghai. ” the utilization of waste heat of air compressor ” . ” hydraulic pressure and pneumatic ” .2009 year the 3rd period
[2] Dai Yongqing compile. ” bromine changes lithium to absorb technology of type refrigeration air conditioning practical manual ” . [M] . .1999 of machinist trade publishing house year
Author brief introduction
Li Dequan (1987- ) , male, intermediate engineer, the refrigeration below the pine (Dalian) production factory, main research direction uses systematic development and application for source of more than heat energy.