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wholesale feed production line Feed mill produces workshop dust control

Mar 22, 2018
wholesale feed production line Dust control of summary feed-processing plant is one of important auxiliary working procedure in feed mill. The article elaborated feed mill to produce a workshop to remove dust the meaning of wind network system and importance, purpose of the form that introduced dust control, design and content, remove dust the problem in reaching a system to design, to remove dust the design of wind network system is mixed choose provide reference. Workshop of production of keyword feed factory removes dust purpose of design of wind net form and content problem Feed Factory Production Workshop Ventilation DustZhang Wei(School Of Animal Nutrition Science And Engineering Wuhan Polytechnic University Wuhanchina)Abstract Feed Processing Plant Dust Ventilation Is Feed Plant Important Auxiliary Process Of. This paper expounds the dust control system in feed mill system of meaning and significance introduces the ventilation dust form design purpose and content dust removal equipment and system design issues as dust ventilation system design and equipment selectionwords feed mill production workshop dust filter systems form design objective and content equipment problem Si Liao Jia Gong Chang Tong Feng Chu Chen Shi Si Liao Chang Zhong Zhong Yao De Fu Zhu Gong Xu Zhi Yi . Ventilated it is to point to to clean air is introduced inside pair of yard place or work space, replace the contaminative airy technology with higher dust content. Ventilated cent is nature ventilated and artificial and ventilated. Removing dust is to point to will contain dirt air medium or the dust of object surface undertakes depart, catch collect, cleared technology. Should say dust control is medium ventilated it is a method, removing dust is a purpose. So, the technology of dust control is the step with the most significant dust that reduces work environment. [Form of 1]1 dust control [the dust control system in 2] small and medium sized business, be called ventilated network or abbreviation wind net normally. Wind net has two kinds of forms one kind is, a machine or an aspiration dot configure machine of a dust catcher, one typhoon to undertake suction wind alone, this calls alone wind the net; Another kind is, the machine of stage or two two above or aspiration dot are operable an a dust catcher, fanner undertakes suction wind, this calls concentration wind net. The machine that decides the principle of form of alone wind net has one of following requirements or suck a dot to use the air containing dirt with epispastic ① of alone wind net to must do alone processing aptly; ② absorbs wind force the requirement is accurate and often must adjust; ③ need wind force is larger; ④ machine itself takes fanner oneself; Need to suck wind to may incorporate without other near ⑤ suck the machine of wind or attract a particle. Two when do not accord with afore-mentioned either conditions or the machine of two above or attract a particle, should use concentration wind net. Of course, of the high demand as environmental protection and bag type dust catcher be perfected increasingly and miniaturization, the wind net form of medium and small businesses is developing to alone, local direction. On the technology that attracts wind to remove dust in every need namely, not only bring fan oneself, and take dust catcher oneself, on the spot purifies the air that contain dirt, or will contain dirt air preliminary the loop after purifying is used. Such, center wind net the malady of the sort of conduit freely across is nonexistent. The assorted principle that centers wind net is in an a few ministry machines or when combination suction a particle centers wind net into, should take care of below 4 principles. The character likeness of.1 epispastic content combines the dust that inhales in same wind net inside each namely, should similar on character. The craft job of each machine is different, they send out the dirt that come out, different also on character and value. Produce a workshop in feed mill for example preliminary the dirt that when clearing, forms is marl, sandy soil, magnetic metal mostly, use value lesser; And the dust that produces when later period clears, contain the organic sex dirt such as a few chaff, Mai Pi and broken grain bead, it is a few valuable by-product. So around clears of the process suck wind, should part as far as possible furnish, so that make,epispastic content is collected respectively. .2 working hours is same the working hours that assembles each machine in same wind net should be same, can make the bear of fanner stable so. Go up in same wind net to undertaking working machine can be received alternately each other, but their wind force should be identical. Setting of.3 wind canal wants reasonable and simple, specific content to include wind canal to answer as far as possible perpendicular lay, to necessary horizontal wind canal, should install sweep aperture airtightly. To dust and the dirt source with accrete lunt, should configure dust catcher directly as far as possible sucking fan housing upper part, make dust, lunt enters dust catcher through perpendicular canal. It is advisable that the included angle of 3 canals uses 30° , 45° commonly. Should install appropriately on the canal flashboard and the wind force regulating unit such as butterfly a powerful person. . Wind canal is general should bright set, cannot hamper footpath and operation, below the requirement that does not increase investment, also should take care of the exterior orderly, beautiful. Fanner of.4 fanner postposition should be decorated commonly after dust catcher (inspiratory type) , in order to reduce dust to fanner wear away; Decorate when fanner before dust catcher (type of calm sb's anger) when, should choose the fanner that discharge dirt. Of course above 4 principles are mutual contradiction sometimes. So, balance weight, comprehensive consideration answers when be being designed. To more complex case, can draft plan of a few combination undertakes contrasting analytic, decide most the network combination with the soundest economy. When setting wind network, still must notice wind net total wind force shoulds not be too big, dot suction wind is unfavorable and too much, go to the lavatory with making adjust and move reliable. The conduit of net of.1 alone wind is compared commonly short and simple, network of unlike concentration wind is intricate in that way. The wind force of net of.2 alone wind adjusts easily and control. And in centering wind net, when some machine or the suction that attract a particle wind force happening changes when, will affect the other machine in the network or the wind force that absorb a dot, it is more difficult to adjust. Net of.3 alone wind often because wind force is less and used small-sized fanner and dust catcher, opposite ground occupied an area more and make arrangement more difficult, and small-sized electromotor efficiency is inferior, wasteful. Center wind net to often keep watch a lot of machines with the volume is minor and adjacent position or combination suction a particle is together, be used up in motivation and invest a respect to contrast economy. The design purpose of 2 dust control and content [the purpose that ventilated network designs 2] design purpose basically is to want to finish two such tasks to decide each of the measure that Duan Feng provides and entire network obstruction. The wind canal with appropriate measure just can make sure each machine has absorb wind force certainly, make air maintains the speed that presses a regulation to move in conduit. In the meantime, air been flowinging conduit and all sorts of when, can encounter resistance, these obstruction must be calculated come out, choose appropriate fanner next, make its produce enough pressure to overcome these resistance. Such, the wind force talent that machine place needs gets assuring, ability achieves dustproof goal. .1 is mixed according to the craft inside the workshop manufacturing characteristic, correctly estimation dust sends out source, send out degree and send out dust property, how does the decision adopt dustproof measure. According to the design the principle determines the assorted shape of wind net correctly, undertake assorted reasonably, decorate, the network that draws a computation to use by space, planar relative position pursues (the axis measures graph or sketch map) . .2. Decide what machine or place of spot suction wind need to suck wind force and wind resistance. . The air current speed inside the canal of wind speed wind in deciding wind is in charge of presses following principle not to make dust is inside horizontal wind canal certainly deposit, cause wind canal to jam; Do not be in charge of because of wind inside wind speed is exorbitant and the motivation that makes the system moves is used up increase. Inside the range that holds 10 ~ 15m/s in the wind speed in the wind canal of the feed-processing plant normally. The wind canal with small diameter should take lesser wind speed, the wind canal with big diameter is desirable higher wind speed, can consult next watches are chosen. Additional, manage medium wind speed to longer horizontal wind, should on the high side a few. Draw near the wind speed in the total wind canal of fan should be wind net in highest. Above place says is the general principle that shows wind speed is certain. To increasing wind speed to balance obstruction simply individually, do not accept the restriction of afore-mentioned limits. . The measure that each paragraphs of wind in computational wind net provides. Be in charge of according to each paragraph the velocity of flow of wind force and make choice of, be in charge of each certainly paragraph section dimension (tubal diameter) . Remove dust certainly when wind is in charge of a diameter, should use the uniform standards that expresses 2 kinds, be helpful for industrialized treatment making. . The form of dust catcher of make choice of, norms, calculate its obstruction. . Computation all obstruction of the obstruction zephyr network that each paragraphs of wind manages, undertake to shunt-wound pipeline obstruction is balanced. Calculate above all each canal paragraph all obstruction of obstruction zephyr net is calculated namely each paragraphs of obstruction of the series connection pipeline with the greatest resistance and accumulative total is total obstruction. Namely the ∑P in ∑P=P1+P2+…+Pn type is obstruction the biggest 2P1, P2, … provides paragraph of instruction for each (each run department of paragraph of standoff of edge Cheng obstruction obstruction) the instruction that considers shunt-wound pipeline next balances computation to show a tentative idea to have one shunt-wound pipeline, be in charge of paragraph of ① and provide paragraph of ② look relatively nod at A (node) , if plan institute is shown. In node A place can have a collective pressure only. But when undertaking wind is in charge of obstruction to calculate, two canals paragraph obstruction is not certain and equal, short of of wind force of as a result designs a requirement. For this, when the two relative value that provide paragraph of computation instruction exceed 10% , need to balance consideration. Block equilibrium method has two to plant is to adjust local resistance, be in namely control damage small raising adds outfit valve on the canal, use its additional resistance to achieve a balance; Another kind of method is the contractible diameter that raise a canal, increase the wind speed that raises a canal thereby, in order to achieve the goal of block equilibrium. When actual computation, , namely before the =d after D is moved is moved (before P is moved / after P is moved) . .6 decides the model of fanner, rotate speed and power are used up, decide electromotor norms. Blueprint of.3 scale construction. 3 dust control remove dust in what basically use in feed mill have fan, dust catcher, reach its corresponding auxiliary —— dust shield, airlock to wait. Dust shield [3] differs according to craft condition, suck fan housing to have two kinds of forms one kind is enclosed suck fan housing; Another kind sucks fan housing to open wide type. Enclosed sucking fan housing is to suck fan housing to be linked together with dustproof and airtight cover, the dirt source that its characteristic is a generation dust local or whole is completely airtight, dust is by limitation inside a little space. Open wide type to suck fan housing (say again exterior suck fan housing) because craft condition place is restricted,be, the machine cannot undertake airtight, can suck fan housing setting to be near dirt source (upside, bottom or flank) , the negative pressure that relies on fan sucks the air that contain dirt. If in bags type casts makings hole and packer,remove dust systematic suction wind device belongs to this kind of form. Dust catcher dust catcher is dust control system important one of, its action is to will contain dirt gas to undertake depurative, come out dust depart, emit into the air after purifying atmosphere again. The classification of.1 dust catcher [the form of dust catcher sort that 2] uses at present is various, mix according to dust catcher principle remove dust the action of the gravity that the method has the following kinds of ① to use grit normally or inertial and centrifugal force, for example dust catcher of expansion chamber, tornado; Use filtering function, for example bag type dust catcher, grain layer dust catcher; ③ is wet catharsis action, for example water bath dust catcher, self-excitation type dust catcher; ④ is used electrostatic remove dust action, for example electric dust catcher. To improve the efficiency of dust catcher, removing dust design middling removes dust a few times integratedly principle, if tornado and bag type dust catcher are combined, it has those who leave mental efforts to remove dust already action, have filter bag again filter action; Have already thick purify, again essence of life is purified. The mill of dust catcher feed with commonly used.2 produces a workshop to use centrifugal dust catcher and bag type dust catcher normally. Centrifugal dust catcher is used rotate the dry type that the inertial and centrifugal force of air current comes out dirt from air depart is purified call centrifugal dust catcher, or call tornado dust catcher. Its structure it is simple, easy to make, cost and moving cost is inferior. [The action that 5] is centrifugal force in the grit in containing dirt air current to move by the action of two force makes grit presses some radial rate moves outwards another force is radial wind resistance radial of edge of dirt of its block up moves outwards the radial speed of grit jumps over big grit by. Tangential to the grit of certain bead diameter rate is older, rotate radius is smaller radial speed removes dust greatly more efficiency is taller. By principle of job of tornado dust catcher knowable grit proportion leaves mental efforts is bigger diameter bigger to leave mental efforts bigger also greatly more. [6] the dust to 10μm above, purify efficiency to arrive high 90% the left and right sides. Centrifugal dust catcher is in the feed-processing plant, customarily calls “ Sha Kelong (Cyclone) ” , basically use as multistage removes dust medium one level removes dust. [Dust catcher of 5] bag type [the efficient dust catcher that dust catcher of 5] bag type is a kind of dry type, it uses fiber tissue filter action undertakes removing dust. It has ① of the following characteristic to remove dust efficiency is tall. The dust of μm, efficiency is as high as 98—99% ; ② is in usually, from the airy of the eduction of dust catcher dust content can reach wholesome level, can return a workshop to be used circularly directly, in order to save heat energy; It is dry that ③ gathers the dust that come down can be used directly or handle; ④ is corroded not easily commonly; The dirt chroma in ⑤ dust catcher may reach explosive level, at this moment if has kindling to enter, can produce an accident; ⑥ changes the labor condition of the worker when filter cloth is poorer; ⑦ place requires cost costlier; If ⑧ is handled is wet sex dust, fabric can appear like incrustation agglomerate or jam phenomenon. The efficiency key of bag type dust catcher depends on crossing the property of makings. Carry out a proof, tabby expects without downy filter comfortable at filtering fiber sex dirt. Bag type dust catcher basically is changed with Yu Zhongjing with purify subtly, when dirt quantity is being contained to exceed 5g/ M3 at the beginning of the air that should be purified, can purify as the 2nd class, efficiency of bag type dust catcher can amount to 99% above. [6] fan [2] fan is to be used at transporting gas. From the point of energy viewpoint, it is a prime mover can transform a kind of the energy that is gas. The fan with ventilated common system has centrifugal type fanner and axis to shed type fanner two kinds, in dust control of workshop of feed factory production amiable force is carried use most is centrifugal type fanner. The pressure that centrifugal type fanner generates is less than 15000Pa or 1500mmH2O commonly. Pressure is less than 1000Pa call low-pressure fan, use at air regulating system commonly; Pressure is less than 3000Pa or 300mmH2O call middling pressure fan; Use at dust control system commonly; Press what force is more than 300mmH2O to call high-pressured fan, use at effort to carry a system commonly. Airlock [5] airlock or make shut wind implement, it is to make separator or dust catcher are below the case that has pressure difference, can smoothly eduction stock, and do not send divulge airy a kind. Airlock is effort conveyor in very crucial. It asks to have good airtight performance, platoon makings wants successive and reliable, not easy and broken stock, over all dimension wants small, want highly especially low. Commonly used airlock has those who need drive to call impeller type airlock and the material that do not want drive to seal pressure door airlock to wait. The structure of impeller type airlock and function and common rotate impeller type offers glassware identical. It is certain to expect sealing pressure door airlock is support accumulation high stock will maintain airtight to ask. Its structure is simple, make convenient, do not need drive. Defect is to need to have taller perpendicular height, otherwise easy leak out. Poorer to farinaceous stock result.

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