CN2156923Y - Automatic control long net dust remover - Google Patents

Abstract

The automatic control fourdrinier dust remover consists of a power driving part, a filter material movement and adjustment mechanical part, a filtering system, an ash removal system and an automatic control system, and is characterized in that the dust remover removes dust by adopting a movement filter material, the ash removal system is arranged outside the filter material system, a complex ash removal device is omitted, the manufacturing cost is reduced, the automatic control system is used for controlling the operation speed of a filter screen, the concentration change of dust-containing gas is automatically tracked, the dust removal efficiency is high, and the dust removal effect is stable; the high adaptability can collect dust of various physicochemical properties, retrieves the drier, and job stabilization has characteristics such as small, the energy saving, easy maintenance, is an ideal high-efficient energy-saving dust remover.

Description

Auto-controlled long mesh duster

The utility model relates to the dedusting technology field, is to utilize control system to regulate the speed of service of filtrate that the variation of tracing gas dust content automatically is controlled at a kind of energy-efficient deduster on the set-point with the resistance of catching dirt body and dust layer on the filter screen.

Existing deduster kind is a lot, and wherein sack cleaner is a kind of preferably in the various high-efficiency dust removers, and it belongs to filter collector.Present filter collector both domestic and external all uses static filtrate, and its filter process is not as catching the dirt Analysis on Mechanism about filtering: " catch irrelevant so-called stabilization process of dirt process and time." in fact As time goes on; the dust layer of filter course surface attachment constantly increases; not only changed the geometry of filter course; influenced the distribution in flow field; and catch the charged of dirt body also in variation; and resistance constantly increases, efficiency of dust collection is also increasing, when resistance reaches certain value, hindered the normal discharging of dusty gas, need carry out deashing and handle, if when filtration velocity is high slightly, or the gas dust content is when changing greatly, can make this erratic process become very very brief, the deashing frequency increases greatly, and therefore static filtrate deduster requires low filtration velocity, Chalk-dust filtering concentration is selected all higher when design, this just causes equipment excessive, and volume is excessive, and it is excessive to consume energy.

The purpose of this utility model is to adopt the dedusting of motion filtrate, deashing carries out in the filtration system outside, filtrate behind the deashing advances filtration system again, use automatic control system, the speed of service of control filter screen, change in concentration from the motion tracking dusty gas, the resistance of catching dirt body and dust layer of filter screen is controlled on the set-point, filtering material resistance is relatively stable, this just becomes " relatively stable process " to original " erratic process ", characteristics such as it is stable to the utlity model has efficiency of dust collection height, dust removing effects, and the deduster volume is little, adaptability is strong, and it is low to consume energy.

For realizing the following technical measures of taking of goal of the invention:

A, drive part: buncher decelerator, the drive installation drive roll on frame, this drive roll drives filter screen and makes unidirectional shuttling movement;

B, filtrate motion and speed governing mechanical part: filter screen pile warp idler roller, driven voller, diastole roller and carrying roller under the driving of drive roll are made cycle operation;

C, filtration system: dusty gas enters elbow under suction function, enter expansion chambers again and pass filter screen, dust is caught by filtrate on the filter screen and dust layer, filter screen is divided into female net and filtrate net, female host will bear the pulling force of running, require distortion little, the filtrate net requires to be attached to tightly female online, and the selection of female net and filtrate net is according to different select different with temperature of the physicochemical property of dust;

D, soot cleaning system: soot cleaning system is in the filtration system outside, when the filter screen with dust leaves filtration system, dust is along with the vibration of net, some comes off in disposal box, again through the brush roll cleaning, the remaining dust of not removing is blown in the water seal tank that falls into the dust tank bottom in the dust tank by the high-pressure blast of blowback bellows and is absorbed by water seal tank, discharges from the dust tank outlet through purified gas;

E, automatic control system: the pressure transmitter of automatic control system is located at before the air-introduced machine of filter screen rear portion, when dust content changes, dust layer on the filter screen thickens or attenuation, resistance increases thereupon or reduces, and pressure transmitter flows to the PID adjuster with the signal that changes, after this adjuster arrangement, input buncher YCT adjuster control motor speed, make network speed accelerate or slow down, online resistance or increase or minimizing are controlled on the set-point resistance of filter screen.So just eliminated " erratic process " of quiet filtrate.Because the resistance " relatively stable " of filter screen, efficiency of dust collection is also just relatively stable, and can adjust; Soot cleaning system is located at the filtration system outside, and deashing and filtrate carry out simultaneously, thereby has saved loaded down with trivial details deashing device, has improved the utilization rate of filtrate again.

The utility model and its advantage of existing static filtrate deduster comparison are: owing to adopt the dedusting of motion filtrate, deashing is in the filter media systems outside, save loaded down with trivial details deashing device, reduce cost, owing to utilize automatic control system, the speed of service of control filter screen, from the change in concentration of motion tracking dusty gas, the resistance of catching dirt body and dust layer of filter screen is controlled on the set-point, make original " erratic process " become " relatively stable process ", the efficiency of dust collection height, dust removing effects is stable; Adaptability is strong, can collect various dust of different nature, and is effective equally to high resistivity dust, not limited by temperature, not limited by dew point, and strong to caking property, bibulous dust is effective equally; Working stability is convenient to reclaim siccative, does not have Treatment of Sludge and etching problem to exist.And have characteristics such as volume is little, power consumption is low, easy to maintenance, be a kind of desirable energy-efficient deduster.

Description of drawings:

Fig. 1 controls fourdrinier wire deduster structural representation automatically;

Fig. 2 is that this deduster is controlled electrical schematic diagram automatically.

Number in the figure: 1, buncher decelerator; 2, drive roll; 3, idler roller; 4, brush roll; 5, driven voller; 6, diastole roller; 7, the blowback bellows that have high pressure positive blower; 8, disposal box; 9, water seal tank; 10, elbow; 11, expansion chambers; 12, PID adjuster; 13, YCT controller; 14, filter screen; 15, pressure transmitter; 16, spiral Machine for cleaning-out ash; 17, carrying roller; 18, dust tank outlet; 19, disposal box; 20, blowoff valve; 21, overfall.

Further specify embodiment of the present utility model below in conjunction with accompanying drawing:

Automatically control fourdrinier wire deduster is by power drive part, filtrate motion and adjustment mechanical part, and filtration system, soot cleaning system, automatic control system constitute.Wherein power drive partly comprises: be installed in buncher decelerator 1, the drive roll 2 of drive installation on frame of frame lower head, drive filter screen 14 and do unidirectional shuttling movement; Filtrate motion and adjustment mechanical part comprise filter screen 14 rack-mounted idler roller 3 of pile warp under drive roll drives, and driven voller 5, diastole roller 6, carrying roller 17 are made shuttling movement; Filtration system comprises filter screen 14, is contained in the expansion chambers 11 of upper rack, is contained in the elbow 10 on expansion chambers top, and filter screen is divided into female net and filtrate net, and it is little that female host will bear running pulling force requirement distortion, and the filtrate net tightly is attached to female online; Soot cleaning system is in the filter media systems outside, it comprises disposal box 19, spiral Machine for cleaning-out ash 16 below the installation collection case, be contained in the dust tank 8 of machine afterbody, the blowback bellows 7 of band high pressure positive blower are housed on dust tank top, and the dust tank bottom is provided with water seal tank 9, and a blowoff valve 20 is equipped with in the water seal tank bottom, purified gas outlet 18 is equipped with in the dust tank outside, and water seal tank 9 tops are provided with overfall 21; Automatic control system comprises: be located at the pressure transmitter 15 of air-introduced machine front, filter screen rear portion, PID adjuster 12 and YCT electric machine controller.(1) pressure control: pressure transmitter 15 is converted into current signal with pressure signal, and current signal is set through the PID adjuster again, and adjuster is regulated by setting range, the signal of telecommunication UP of output pressure control; (2) control of rotating speed: for reaching the requirement adjusting speed accuracy, added the rotating speed negative-feedback in this system, tachometer generator CF and the coaxial connection of YCT motor output end, tachometer generator CF takes out a part of voltage U F with generating voltage and participates in control after rectification; (3) system's master control: by pressure signal, speed feedback signal is delivered to the YCT controller and is carried out system's control, the YCT electric machine controller constitutes the input that (by the given voltage U G three's of UP, UF and YCT controller algebraical sum △ U=(Ug+Up-UF) constitutes amplifier by given potentiometer Rg, amplifier, trigger and controlled rectifier, again through trigger, adjustable rectifier is exported the dc coil that controlled DC voltage is supplied with the YCT motor, according to size of current, decision YCT motor speed size; When pressure P increases, UP ↑, △ U ↑, n ↑, UF ↑, regulate the ratio of Up value added and UF value added, make Up ↑ back n ↑, the increase of UF only participates in n stable operation afterwards in a speed of fixing, promptly reach P ↑, n ↑ from motion tracking.In a word, pressure transmitter 15 flows to PID adjuster 12 with the signal of telecommunication that changes, after arrangement, be input to YCT controller 13, YCT controller regulation and control rotating speed of motor makes the network speed quickening or slows down online resistance increase or minimizing, the resistance of filter screen is controlled on the set-point, so just eliminated " erratic process " of filtrate, made the resistance of filter screen relatively stable, realized the relatively stable of dust removing effects.

Claims (4)

1, controls the fourdrinier wire deduster automatically by the power drive part, filtrate motion and speed governing mechanical part, filtration system, soot cleaning system and automatic control system constitute, wherein power drive partly comprises: the motor reducer 1 that is installed in the frame lower head, rack-mounted drive roll 2 drives filter screen 14 and does unidirectional shuttling movement; Filtrate motion and adjustment mechanical part comprise filter screen 14 rack-mounted idler roller 3 of pile warp under drive roll drives, and driven voller 5, diastole roller 6, carrying roller 17 are made shuttling movement; It is characterized in that filtration system comprises: be installed in the expansion chambers 11 of upper rack, be contained in the elbow 10 on the expansion chambers; Soot cleaning system is in the filter media systems outside, it comprises: disposal box 19, be contained in the spiral Machine for cleaning-out ash 16 below the disposal box, be contained in the dust tank 8 of machine afterbody, the blowback bellows 7 of band high pressure positive blower are housed on disposal box top, dust tank 8 bottoms are provided with water seal tank 9, and the dust tank outside is provided with purified gas outlet 18; Automatic control system comprises: be located at the preceding pressure transmitter 15 of filter screen rear portion air-introduced machine, PID adjuster 12 and YCT speed-regulating motor controller 13;

2, according to the described fourdrinier wire deduster of claim 1, the YCT controller 13 that it is characterized in that automatic control system is by given potentiometer Rg, amplifier, and trigger and controlled rectifier constitute;

3, according to the described fourdrinier wire deduster of claim 1, feature is in water seal tank 9 bottoms a blowoff valve 20 to be housed altogether, and top is provided with overfall 21;

4, according to the described fourdrinier wire deduster of claim 1, the filter screen that it is characterized in that filter media systems is divided into female net and filtrate net, female host will bear pulling force, and the filtrate net tightly is attached to female online, and the selection of female net and filtrate net is to select according to the physicochemical property of dust is different with temperature.

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