In ministry of American Chinese and Western, manufactory of large minority food applies constrictive air and spot to make nitrogen stop to consume and be packed to a variety of food. It is 4.5 cent when electrovalency / when KWh, the income that goes up every year in the specific power consumption with constrictive fragmentary air is manufacturer 430, 344 dollars.

Food of this project secondary delibrate packs a process medium air is constrictive and fragmentary, delibrate effect can make the works increases the aeriform flow of 689scfm, waste $54, the capital of 671. This project uses open mode to blow rehabilitate of divulge of gas, nitrogen and the method that use air oscillator to maintain the move of the product.

Because the word counts limitation, the article will show us for the reader the consequence that in constrictive gas observation of fragmentary demand square place goes to, stop to be discussed in detail to dropping the detailed plan of aeriform discharge.

Constrictive gas is fragmentary evaluation

This factory has two constrictive computer rooms, among them central computer room makes azotic installation offer constrictive air for mill consumption area and pressure swing adsorption, another computer room gives birth to inn to supply constrictive gas for biscuit.

The constrictive air of central computer room is fragmentary include 3 250-hp to be decided without oil fast rotate screw air is constrictive machine, at the same time they do not have oily gearshift drive to rotate through conduit and two 400-hp screw air constrictive machine is linked together, recommend constrictive gas together by these 5 equipment two large and refrigerant gas is finished in as dry as a chip machine as dry as a chip.

And another computer room by rotate of two 250-hp without oil constrictive aircrew becomes helix rod, and in constrictive machine inside buy has billabong HOC (hot pressing) gas bosomy type is as dry as a chip implement, in order to is as dry as a chip gas.

The constrictive air in two computer rooms is fragmentary and annual the task 8, 600 hours. Fragmentary laden curve (air demand) absolutely in all locomotive orders wave motion. As a whole, discharge of annual and fragmentary gas is in 4, 000scfm arrives 6, between 200scfm, it is about equably 5, 200 to 5, 500scfm.

If the watch is shown 1 times, the even and fragmentary discharge of central computer room is 3, 627scfm, constrictive machine discharges even air pressure is 105psig, fragmentary and even pressure is 9psig. Central computer room always outputs power to be 748kW, it is 4.85scfm/kW than power. Constrictive airy charge of electricity is every unit discharge annual $79.81/scfm, charge of electricity of airy of every unit pressure is annual $1, 447.38 Psig. The charge of electricity with central annual computer room is $289, 476.

The even and fragmentary discharge of bakery computer room is 1, 968scfm, discharge pressure to be 90psig equably, even and fragmentary pressure is 80psig. The computer room always outputs power to be 364kW, it is 5.4scfm/kW than power. Constrictive airy charge of electricity is every unit discharge annual $71.58/scfm, charge of electricity of airy of every unit pressure is annual $704.34psig. The charge of electricity with central annual room is 140, 868 dollars.

The task that passes constrictive opportunity is analysed, constrictive equipment runs in two place good. But the situation that no less than often encounters when stopping constrictive air to evaluate is same, our group discovers, constrictive function is in an air quite when power reached additional power, offerred empty throughput is gotten lesser than what what need however much. But from the watch 2 we can see, air current (bear) the electric power that carries out demand and aircrew is expended marry, consequently this kind of state was not in this food factory appear.

Remove dust fragmentary evaluation: Food factory the achievement of inevitability

In any food factories, remove dust fragmentary evaluation appears very important. In this food factory, we meditated 12 dust catcher handle constrictive airy situation, discover dust catcher take makings measure appropriate, and there is enough store space between every dust arrester. Demand control is very invalid, the hop-pocket of dust arrester also changes in appropriate time. In addition, the movement of these installation did not apply timer, but the other pipeline that even if opens high-pressured gas nearby or be result also won't produce in connecting dust catcher.

Remove dust in typical pulse efflux fragmentary in, dust is used hop-pocket probably pectination eliminate implement after collect, can form the dust with tectonic and appropriate measure piece, can use constrictive air pulse to erode its from hop-pocket. Should dust piece is moved to divide from inside dust catcher by correct ground when, fragmentary will appoint dust eliminate of the environment successfully, and hop-pocket is had use life normally; But if dust piece cannot be disabled the ground from the eliminate in dust catcher, dust arrester will get the use that remove dust, and meet what lengthen hop-pocket greatly use life.

When the condition of constrictive gas feed of equipment is normal, use demand to controller can expend fewer air and achieve better result. But if be in,demand controller was not applied below condition of appropriate constrictive air feed, can meet expend more air, and reduce hop-pocket handle life and function. Consequently, correct operation dust catcher is fragmentary to reducing capital and progress efficiency is crucial. In the meantime, the dust collection that also has a lot of is fragmentary be to pass timer to control constrictive air pulse, operation personnel installs timer through detailed state, so that move invalidly,divide dust piece uses life with what assure hop-pocket.

Remove dust fragmentary design is regular invalid remove dust the pressure of the mouth that take energy of life of needs manifold and pulse a powerful person.

Pulse a powerful person will give mensurable constrictive gas to send to hop-pocket with booking speed, the dust that goes up in order to erode with liquidation hop-pocket piece. Given empty tolerance size depends on pulse nozzle falls in booked state, by the constrictive airy pressure of constant voltage infuse.

About every time pulse, dust catcher is indispensible at correct ground (or adjacent at it) , on the pressure degree that wave motion can relapse, what apply timer to control pulse especially is time. Operation personnel can pass a test, find the sequential ” with the correct “ below needs inlet pressure. But once pressure alters, fragmentary function can be met become poor.

Dust piece go up from hop-pocket hard clean up is the result that often presents, less important cause can be pulse implement call in to hop-pocket in the time of impropriety pulse, also can be the time between pulse grows too two, bring about dust piece accumulates bigger more, cause disable hard clean up. This not only meet those who lengthen hop-pocket use life, still can make fragmentary function drops greatly. A few when present this kind of state primary reason have:

The timer setting of 1. operation condition is incorrect. The practice demand that decides optimal timer is installed can be met as the change of consumer goods change, change along with season even and change. Consequently timer from one germinant install meticulously with respect to demand, and time monitoring.

2. lacks enough storage space or enough air to supply in place of air admission hole, make fragmentary the empty tolerance that must reduce aeriform pressure to satisfy pulse place to need.

The air inlet duct of 3. dust catcher is transient small, also can happen to lack similar result with air supply.

4. too small or the recuperation a powerful person of impropriety, cannot deal with the aeriform flow that dust arrester place needs.

Everything these states can bring about aeriform discharge is restricted. The reason that presents these states is, be before device or change in certain operation before, not do-nothing remove dust the aeriform discharge with affirmatory and proper operation. The size of air inlet duct, size that recuperates a powerful person and enter tolerance how many demand consults fragmentary and detailed gas “ carries out discharge ” , and cannot apply ” of even discharge of so called “ .

” of “ even discharge is constrictive airy discharge (with cubic metre foot / minute for unit) , need with process place or it is to output fragmentary air quantity to concern. And ” of “ practice discharge is the empty throughput that shows fragmentary place needs (with cubic metre foot / minute for the unit) . If be inside casual laborer husband, the empty tolerance that fragmentary place requires even if is likened to small, still can very big “ carries out discharge ” . This is the characteristic that dust catcher has.

Sequence control implement the ” of “ practice discharge that can need to fragmentary place produces very apparent effect. E.g. , a dust catcher of 6 pulse a powerful person can apply 3.5 cubic metre foot constrictive air, every pulse surmounts half second.

If these two kinds different “ discharge ” is used at control,give tracheal road flow, criterion their exchange manages implement the influence of the respect such as dimension will present similar difference. Enter manifold to be able to form rated pressure loss with high velocity of flow, affect pulse cleanness then implement function. If be necessary, similar result also can be used in alter air is admitted implement on dimension, in order to reduce fragmentary press with what give tracheal way fall.

  The recommend that quality pressure expresses

Pressure of a quality expresses the device of nearby of dust catcher entrance that we suggest to give tracheal way in every normally. Look carefully at pulse to pound the pressure on the watch, if press,fall exorbitant, be necessary to find out its cause. Time of time of pressure of feed of the aeriform discharge that understands dust catcher norms, every pulse, pulse, the circulation between pulse. Calculate next fragmentary air flow, introspection conduit diameter and storage space whether appropriate, with resolution whether add storage space. Should control estrangement probably conduit joins when presenting result, can have a few constrictive gas is divulged (10 to 15 cubic metre foot / minute more even) . And such divulging often discover hard, very difficult also rehabilitate.

Choose proper measure and memory installation for dust catcher, the operation that there can be demand of larger volume gas inside will brief period changes the operation with even very small discharge. If not the high demand pulse with short demand (be less than 1 minute) , should be in admit implement later device recuperates a powerful person.

Adding storage space appropriately is not merely ponder from energy level, ponder from airy quality level more. Correctly control dust catcher can let what nozzle is in press fall right all around fragmentary influence is reduced, of the function that dust catcher also can progress in the meantime and outspread hop-pocket use life. Dust catcher is a main divulge source, detect very hard. Pulse controls estrangement also constant divulge, and warning apparatus of electronic air current can discover this achievement far removed ground, intuitionisticly and receive order of letter in reply.

After fragmentary replacement is fluctuant, introspection the locomotive condition of every dust catcher, ensure timely ground is right of hop-pocket stop to change, control task demand, ensure fine of all without exception between photograph adjacent equipment is affected even.

  Processing opens type to play gas result, attain the optimal result that blow air

To the factory the constrictive air of two area is fragmentary stopped audit and complete evaluation, discovery can increase air flow through a few kinds of method. Among them one is open mode aspirated optimize.

Onflow is constrictive air is direct from inside conduit ejective, meeting waste a few constrictive air, violate a profession restful with in good health standard (OSHA) in the regulation of concerned tone, and demand of pressure of far still short of. The spray head that uses air efflux and revulsive air activity replaces open mode to blow air, can lower tone rate, increase constrictive airy to apply, still can progress normally the efficiency that blows an exercise and quality.

Plant plant narrow in proper Wen Qiu implement with controller. And use mechanical wrist germinant and morely liquidate dust piece, use constrictive air in order to increase. These optimize measure to make air current demand increases 305scfm, annual power consumption increases 539, 644kWh, be equivalent to saving $24 every year, 284.

The product that there are a lot of jet efflux installations and revulsive air stream on market is usable. But the experiment of a nozzle can differ somewhat with another nozzle of same manufacturer, difference is not big nevertheless. It is the point that demand remembers below:

5. is in the process that blow air, demand pressure thrust (Psig) will become loose should blow the dirt that remove.

6. once air parts “ blows ” installation, thrust is met rapid be lost.

7. is being blown in eliminating a process, total wind force (Cfm) , constrictive air and bring wind to divide work about blowing crucial.

8. regards first artifice; machine, hydraulic pressure as to wait costly constrictive air is more energy-saving artifice forever, often more restful also.

The air that all blowing go out should recuperate 9. to disable to lowest pressure. Taller pressure be accompanying is worn larger flow, and this often is done not have necessary, because higher pressure can make consumptive capital taller. The pressure air that air-blower offers is met more economy.

10. whenever, should use up can the ground applies the air in Wen Qiu to narrow implement the air thrust that nozzle —— comfortable other place chooses to offer and bulk, this can increase normally at most of 50% blow clean to enrage, the air that issues the province is used other on more valuable exercise.

11. is in consumption not the time of demand, all processes that blow clean air are OK and voluntary break down.

12. can be used when the air of air-blower happening or be in economically trenchant and feasible when, should its capital of only motive force and replace motivation to stop to be likened to.

Better nitrogen is controlled, better air vibration idea

The 2nd idea that raises throughput is emphasized in the factory to use nitrogen (on N2) . Delibrate group looked carefully at 20 groups to install bag of exercise hind in a district, discovery removes a kind of product outside, bagging of ministry of other overall situation is fragmentary use nitrogen. Nitrogen is the automata that is 580-scfm by the capacity makes nitrogen install site preparation, serve as with liquid N2 reserve. The dosage of nitrogen is 320 ~ 350 Scfm, purity is in 99.7% ~ 99.8% between. Of nitrogen generate than be 5:1 about, every cross 60 ~ 65 seconds, can have 1750 cubic metre foot air is used to produce 350 cubic metre foot nitrogen. Normally, when consumptive line stops, the supply of nitrogen still is stopping. In be investigated on the spot, about 7 sack filling machine were stayed to be on the consumptive line that does not run, the remain in every sack filling machine has 3 to arrive 20 cubic metre foot nitrogen.

The factory was used close automatically control will handle this success. When not when demand nitrogen, it will be automatic the supply of break down nitrogen. It returns unit the carry dosage that control a powerful person will come to recuperate nitrogen. This optimizes measure to make air current demand increases 300scfm, annual power consumption increases 530, 800kWh, be equivalent to saving $23 every year, 886.

Original, the factory applied a kind of better idea, apply air oscillator to hold to product or the move that pack or take leave of. The air of the air oscillator that factory of false consistent home applies carries dosage is every 10 Cfm to control, so similar dynamoelectric oscillator should consume the word of contrary product, with respect to demand 2.5-hp or higher power, and this can the power output that demand 0.25-hp controls. Demand of this air current when optimizing measure increases 84scfm, annual power consumption increases 144, 480kWh, be equivalent to saving $6 every year, 501.


Food packed business empty to show to want an end next, apply namely the measure with capital expensive benefit, be opposite in order to increase central consumption area and bakery constrictive airy demand, saved capital in this one process. We will last delibrate applies new measure, in order to raise pair of constrictive airy requirement, improve supply to run, in order to arrive more saving.