What do research of method of off-gas treatment of coating industry industry and its project application have?

It is science in order to build coating production manufacturer to study a target, study its volatile scientificly organic matter (the blowdown of VOCs) is characteristic. Mix from soot waste gas severally contain system of machine dissolvent waste gas to begin product line equipment and off-gas treatment equipment to reorganize design program, make its VOCs blowdown exceeds standard of the environmental protection before look over to set, and be the off-gas treatment of enterprise of manufacturing industry of other building coating show the energy-saving kind decreasing a platoon that has economic value and working experience.

Chemical plant machines a process to include 2 levels to the environmental pollution of environment: It is the inorganic compose blowdown in machining a process; 2 because have the drawback of itself of orgnaization blowdown equipment,be, cause waste gas to lose reasonable solve and instantly blowdown takes air, cause the environmental pollution of pair of circumjacent environments.

Organic chemistry waste gas is the contaminant of steam condition air that pair of people and a kind of environment endanger, it is city of big city periphery one of crucial cause that actinic pollution produces. Its key comes from the pharmaceutical factory such as material of building coating, colophony to produce production job whole process, its key component is organic waste gas (VOCs) .

Building coating is made in production, engineering construction, dry impetuous, dry solid defeats breast in whole process, release the VOCs of certain amount to the middle of gas, although build coating to developing a tendency toward the azimuth of low pollution, free from contamination, show level water-solubility to change, pulverous shape is changed, change without solvent wait for green to make modelling build coating to hold whole world total production value 70% the left and right sides, but off-gas treatment is production company of production of each old building coating all the time cannot evasive difficulty. According to watch of standard of environmental protection of national VOCs waste gas, the VOC blowdown provision that shows level is less than 50 Mg/m3.

Can last what make a trade to maintain building coating development view, business of building coating production searchs VOCs continuously energy-saving the countermeasure that decreases a platoon and means method, ceaseless and perfect. Manufacturer of production of A building coating just began capital to throw asset to begin 2014 energy-saving model of coating product line transform newlier, increased transition to expand scope 2015, the heavy production in weighing is made energy-saving model building coating. From 2015 the 3rd quarter just began, carry out VOCs gradually the energy-saving countermeasure that decrease a platoon is improved continuously, if reflective whole process volatilizes,organic dissolvent cold doubt is bought maintain emerald production to make, in retort and cast the excessive outside balanced conduit promoting to prevent waste gas between batch can, to storing coal tub is prevented divulge a system to begin promotion to wait. The key in article introduces A plant in detail the promotion of off-gas treatment system.

The crucial phase of factory VOCs blowdown is included store coal tub casts the blowdown in makings and memory process, blowdown in blending boiler to cast canister of makings and the blowdown in blending whole process, commodity to install whole process to wait at ordinary times. Key of system of blowdown of industrial district waste gas has 2: (1) collect of treatment process waste gas solves a system, the key solves the Gao Nong in machining a process waste gas of low total flow; (2) join system of off-gas treatment of material whole process, crucial characteristic is value of settlement waste gas chroma low, wastage is big. Environmental protection bureau sets one plant one blowdown, so that nimble government orgnaization is begun to waste gas blowdown,detect, the later period in also be additionally is installed to all sewage draining exit long-range supervisory equipment makes Xuan prepare ahead of schedule.

Transform newlier to the confluence of system of waste gas collect include: (1) to batch can is being cast to open to the outside world instantly each inside raw production workshop the pipeline of blowdown begins confluence, system of convulsions of washer of first floor of convulsions system join; (2) cast 4 buildings system of makings station convulsions to close spell system of convulsions of first floor washer; (3) first floor system of convulsions of the automation line that pack closes spell washer convulsions system, soot sinks according to washer after deciding solve on time together with waste liquid of caustic soda solution.

System of blowdown of convulsions of treatment craft conduit and bag Xuan cast makings convulsions system to close the difficult problem with a serious case is created after going all out, convulsions conduit must wind is many, power of the output after be forced to do opens washer system is 4 KW, platoon wind force is the centrifugal fan of 2 000 M3/h. goes out after opening centrifugal fan 2 difficult problem: (1) system of steam of the one part in former retort by system of infuse off-gas treatment, promoted off-gas treatment systematic load; (2) when washer system saturation the organic dissolvent that condition moment will suck Fu saturated condition inside washer is taken out come, the active carbon that urges off-gas treatment tail end is rapid and saturated condition, promote off-gas treatment expenditure. Relate difficult problem to handle place, launch promotion to off-gas treatment system.

1, close go all out cast expect the system that take wind and retort process system of convulsions of craft whole process

Cast makings suck whole process of system of fan housing convulsions and manufacturing technological process to breathe a powerful person to discharge wind system system to add up to value of chroma of the waste gas after going all out to rise substantially. Before enlarging a wind force, the VOCs in machining craft pipeline so always is delivering makings and report be taken out to come in whole process. Because raw material of ministry of coal tub is balanced,be measured to cast off by the convulsions that the side after sewage draining exit of breathing a powerful person enlarges, when consequently breathing a powerful person is opened, very much tall thick waste gas or steam is flashy outside canister be cominged to by eduction. These adding the settlement that took out the waste gas that come to add system of original off-gas treatment greatly greatly is laden. The basis launchs a record to taking wind force at present, design program gives two plans plan.

Plan of the first plan is to be in side of each breath a powerful person is rear promote with cast those who expect convulsions system is similar is cylindrical convulsions system, begin successive convulsions to breathing periphery of a powerful person, but produce automation line because of making a living each store coal tub often has a powerful person of a breath, gross is varied, at present convulsions quantity can not consider to store entirely coal tub above the demand that brings Xuan to obtain fan housing alone.

Plan of the 2nd plan is will all breath connection of a powerful person is in charge of to convulsions, in treatment subsequently system of blowdown of technology waste gas or steam closes the director that go all out and cast makings system total convulsions to be in charge of fork to close go all out place make attract fan housing type waterproof bushing. This means takes out waste gas not actively come, maintain convulsions of treatment technology waste gas or steam to be in charge of the air pressure that has 50 MPa only, it is not easy to assure waste gas system the waste gas of manufacturing technological process with compulsive overmuch infuse. Because should plan plan to did not take waste gas or steam actively,come out, bring about VOCs steam system to be inside vacuumize pipeline assemble, waste gas of the corner inside the director of the group that raise a canal that causes each canister to breathe a powerful person to stand to off-gas treatment, pipeline of waste gas blowdown will become can light aeriform pipeline, because this needs blowdown of full waste gas or steam,indicate again on pipeline ” can burn gas ” word.

Because join makings system must wind is many, reason opens wind of first floor 2 000m3/h a large number of air exhauster. If casting the stiletto on controller of makings convulsions system to be in charge of as convulsions of system of treatment craft convulsions instantly, will increase greatly cast expect those who suck system of fan housing convulsions is laden, consequently still 2 buildings machine open the centrifugal fan of 25 M3/min of craft convulsions system, its are ventilated wind canal arranges flow direction to be inserted into cast makings system convulsions to be in charge of, do not endanger cast makings the platoon wind force that absorbs system of fan housing convulsions. See a picture actually 1.

2, waste gas beforehand cold doubt, the organic dissolvent in waste gas of in advance collect

Washer adds active carbon to solve a system to be able to loosen easily gently solve low total flow, Gao Nong to machine technology waste gas or steam, great majority waste gas is in washer by in close, of washer of all previous classics remain waste gas to be begun finally according to active carbon suck Fu to solve, after solving can instantly blowdown enters air in. Show level, because join of former washer system joins hopper convulsions system, the wind that be forced to do opens first floor 2 000 M3/h is many and centrifugal fan. Cast expect into wind system and treatment craft system of whole process convulsions closes before going all out, waste gas can be amply in washer with caustic soda close in solution, subsequently according to side canister of rear and active carbon. After but washer side is rear centrifugal fan is opened, not only waste gas is not OK and enough in be being begun with solution of the caustic soda in washer, close, and become when condition of washer system saturation, quantity of convulsions of big centrifugal fan sucks the waste gas of Fu take out inside meeting general washer, the active carbon that urges off-gas treatment tail end is rapid and saturated condition. Consequently, be forced to do introduces new machine equipment to be opposite at present treatment craft begins off-gas treatment to be transformed newlier.

Most first, the damp inside the body of VOCs of organic dissolvent sex in wanting to solve waste gas system. The raw material key that because A processing factory casts makings and place of system of treatment technology waste gas or steam,takes is the fluid Zuo raw material such as various organic dissolvent, if do not have the side before washer,promotion goes wet equipment, the waste gas that contains organic dissolvent can make the caustic soda solution inside washer quickly saturated condition.

Take second place, the power after washer is centrifugal of fan open the waste gas that causes washer to contain the fungus infection of hand or foot inside body of caustic soda solution a lot of deliquescent, make back end develops value of waste gas chroma to rise not only, and can make system of carbon of tail end active wet, make activated carbon filters thereby working ability is reduced substantially.

Be aimed at or so standard, the difficult problem that must tackle first most is outside the promotion before washer buy goes wet equipment. Cold doubt chooses to go in transforming whole process newlier wet method, waste gas is in condenser of all previous classics is junior to mouth of waste liquid collect, subsequently reentry arrives washer. Waste liquid is sedimentationed by active force foundation enter chamfer of waste liquid collect, begin collect blowdown on time by full-time personnel. After development of front of waste gas system promotes condenser, because extremely fast cold to containing machine dissolvent waste gas to begin doubt, can have created situation of body of the excessive outside coagulating, crystallization, must be opposite on time with steam consequently the material of crystallization body chemistry in washer begins reactive force to clear.

3, choose system of off-gas treatment of microtherm plasma purifying device

Microtherm plasma purifying device is deliquescent the principle of contaminant of steam condition air is: Most first, source can electronic parts atttacks contaminant of organic chemistry air instantly, in the molecular structure that changes air contaminant according to bumping aux will be able to to measure or element, get the molecular structure of kinetic energy or element are aroused, structure of one part element can is by weak electrolyte particularity base round; Take second place, particularity base round from the source can excitation state jumps over change downward, can cause ultraviolet ray child, its begin report with harmful material instantly, make structure of steam system element bolt burst enough dissolves; Final, particularity object can dissolve instantly contaminant of steam condition air, it and effect of other member structure cause new oxygen freedom radical and arouse chemical material, can dissolve further the chemical material such as the acid of quality of small opposite element.

The factory is specific in machining a process, must the waste gas that appropriate handles large total flow, inferior pH indicator, be forced to do guides Zuo aids equipment of off-gas treatment machine. All previous is chosen via planning plan to compare more, use equipment of machine of off-gas treatment of microtherm plasma purifying device finally to be begun to the waste gas after washer solve.

Factory key endangers air contaminant is xylene and xylene, conjugate of equipment of machine of purifying device of plasma of reason low temperature is calculated with xylene, xylene plan, be like a watch actually 1 graphic representation.

Know via calculating place: Of the quantity of xylene and the material that Co2 reflects than 1 ∶ 9, of opposite element quality than 23 ∶ 36; Of the quantity of xylene and the material that Co2 reflects than 2 ∶ 21, of opposite element quality than 53 ∶ 84. Manage together knowable: Of the quantity of xylene and the material that active oxygen reflects than 1 ∶ 6, of opposite element quality than 23 ∶ 72; Of the quantity of xylene and the material that active oxygen reflects than 1 ∶ 7,