CN203329565U - Urea negative pressure dust removing system - Google Patents

Abstract

The utility model discloses a urea negative pressure dust removing system which solves the problems that a cyclone dust extractor is not high in efficiency of removing fine dust, and a high temperature electric dust removing method is immature in technology and difficult to popularize in the prior art. The urea negative pressure dust removing system comprises cyclone dust extractors, cleaners and induced draft fans. The airflow inlet of the cyclone dust extractor is connected with a dust production portion through a pipeline, the airflow outlet of the cyclone dust extractor is connected with the air inlet of the cleaner through a pipeline, the air outlet of the cleaner is connected with the air inlet of the induced draft fan through a pipeline, a plurality of sets of filter screens parallel to one another are arranged in the cleaner, the included angle alpha between the filter screens and the horizontal plane is larger than or equal to 90 degrees and smaller than or equal to 150 degrees, a storage cavity and an opening-closing device are arranged at the bottom of the cleaner, and a vibrator is fixed to the middle of the filter screens. The urea negative pressure dust removing system has the advantages of being simple in structure, low in manufacturing cost, low in power consumption and the like, and can recycle fine dust, save raw materials and reduce dust pollution to the atmosphere.

Description

A kind of urea depression dust-removing system

Technical field

This utility model relates to a kind of except dust recovery system, particularly relates to a kind of urea depression dust-removing system.

Background technology

Dust is one of atmosphere pollution reason, health that can harm humans.Dust generally results from mechanical process (fragmentation, screening, transportation etc.), can in gas, disperse (suspension) certain hour.The particle size range of dust is very wide, by carefully to 1/10 μ m to hundreds of micron.

At present, generally use the cyclone dust collectors dedusting in industrial production, the application of middle low temperature cyclone dust collectors (<400 ℃) is very extensive, be characterized in simple in structure, processing ease, cheap, but efficiency of dust collection is not high, even the most efficient cyclone dust collectors, for 50 μ m dust, efficiency of dust collection can only reach 96% left and right; To 5 μ m dust, only has 73% left and right; And, to 1 μ m, be only 27% left and right.In the high-temp. vortex dust removal process, it is large that dusty gas viscosity becomes, and the hot properties of particle also changes thereupon, and therefore when using cyclone dust removal, effect can be poorer.Even three cyclone dust collectors series connection are used, its dust removing effects can not meet environment protection emission, so cyclone dust collectors can only be as pre-dedusting.

And, for the high-temperature electric dust collection method, according to current prior art operation experimental record of 100 hours under 650 ~ 790 ℃, 570kpa, efficiency of dust collection can reach 95% ~ 99.5%.But it exists, and corona discharge is unstable, electrode life is short, to problems such as smoke components sensitivity and high-temperature insulations, the technological difficulties difficulty has breakthrough at short notice.In actual production, the dust that for example composite fertilizer produces in producing, need timely recycling, not only saves material, and can also reduce the dust pollution to atmosphere.

The utility model content

It is not high to the fine solid particle efficiency of dust collection that the utility model has overcome in prior art cyclone dust collectors, and the problem of the immature difficult popularization of high-temperature electric dust collection method technology, provide a kind of with low cost, the urea depression dust-removing system of good dedusting effect.

Technical solution of the present utility model is, provide a kind of urea depression dust-removing system with following structure: contain cyclone dust collectors, clarifier and air-introduced machine, the air flow inlet of cyclone dust collectors connects dust by pipeline and produces position, the air stream outlet of cyclone dust collectors connects the air inlet of clarifier by pipeline, the gas outlet of clarifier connects the air inlet of air-introduced machine by pipeline, described clarifier inside is provided with the parallel screen pack of many groups, the angle of screen pack and horizontal plane is α, 90 °≤α≤150 °, the bottom of clarifier is provided with storage cavity and closing device, the middle part of screen pack is fixed with vibrator.

Cyclone dust collectors are dry cyclone dust collectors, cooling cyclone dust collectors and dedusting cyclone dust collectors.It is drying machine, cooler and each dust collection point that dust produces position.Vibrator is vibrating motor or electromagnetic vibrator.Closing device is weight turner or electric butterfly valve.

Compared with prior art, the utility model urea depression dust-removing system has the following advantages: thick, the intermediate dust that cyclone dust collectors produce in can production process is purified and is reclaimed.The recycling of clarifier to reluctant fine solid particle, not only save material, and can also reduce the dust pollution to atmosphere.。The utlity model has the advantages such as simple in structure, low cost, power consumption be little.

The accompanying drawing explanation

Fig. 1 is the structural representation of the utility model urea depression dust-removing system;

Fig. 2 is the internal structure schematic diagram of the utility model urea depression dust-removing system purification device;

Fig. 3 is the structural representation of the utility model urea depression dust-removing system screen pack.

The specific embodiment

In the accompanying drawing explanation, label 1 is dry cyclone dust collectors, the 2nd, and air-introduced machine, the 3rd, clarifier, the 4th, storage cavity, the 5th, screen pack, the 6th, cooling cyclone dust collectors, the 7th, the dedusting cyclone dust collectors, the 8th, dust produces position, the 9th, vibrator, the 10th, closing device.

Below in conjunction with the drawings and specific embodiments, the utility model urea depression dust-removing system is described further:

As shown in the figure, the Main Function of cyclone dust collectors is that the dust that air-introduced machine 2 is extracted to each dust point is separated, and turns back to production line and applies.The utility model shares three cyclone dust collectors, respectively dry cyclone dust collectors 1, cooling cyclone dust collectors 6 and dedusting cyclone dust collectors 7, respectively by the outside air inducing of air-introduced machine 2 separately, the dust that dry air-introduced machine 2 extracts in drying machines, then 1 dedusting of drying cyclone dust collectors; The dust that cooling air-introduced machine 2 extracts in cooler, then through cooling cyclone dust collectors dedusting 6; Dedusting air-introduced machine 2 will be collected again through 7 dedustings of dedusting cyclone dust collectors by the dust (comprising belt, bucket elevator, sieve, disintegrating machine etc.) except dirt pits from each.

Air bubble and vibrator are installed on each deduster, pile up on wall to avoid dust, a hopper and two weight flap valves also are installed on each deduster, the dust of collecting can be discharged on return conveyer.Be provided with the system pressure test point on the import of cyclone dust collectors and outlet line, and detect and pressure difference detected by inlet and outlet pressure, judge whether cyclone dust collectors inside exists clogging, this pressure difference should be at 1-1.5kpa, and any numerical value beyond this scope has reflected that there is fault (stopping up appears in cyclone dust collectors) in system usually.If the entrance of whirlwind stops up, pressure reduction will increase, and throughput will reduce.This may cause can't carrying out sufficient dedusting from the dust in equipment, makes the dust in device too much, to subsequent handling, brings problem.On the other hand, if dust can not separate effectively from cyclone dust collectors, so just lost " whirlwind " effect, now pressure drop meeting is showing and is reducing, and efficiency of dust collection descends, and excessive dust enters clarifier 3, causes a series of problem.

For reluctant fine solid particle, by negative pressure draw phoenix by the multiple filtration net 5 in clarifier 3 after, can be filtered net 5 absorption, final under the vibrating device effect of screen pack 5 middle part vibrators 9, dust can be collected in storage cavity 4, closing device 10 by bottom, pour to powder on conveyer belt recycling.

Claims (5)

1. a urea depression dust-removing system, contain cyclone dust collectors, clarifier (3) and air-introduced machine (2), the air flow inlet of cyclone dust collectors connects dust by pipeline and produces position (8), the air stream outlet of cyclone dust collectors connects the air inlet of clarifier (3) by pipeline, the gas outlet of clarifier (3) connects the air inlet of air-introduced machine (2) by pipeline, it is characterized in that: described clarifier (3) inside is provided with the parallel screen pack (5) of many groups, screen pack (5) is α with the angle of horizontal plane, 90 °≤α≤150 °, the bottom of clarifier (3) is provided with storage cavity (4) and closing device (10), the middle part of screen pack (5) is fixed with vibrator (9).

2. urea depression dust-removing system according to claim 1, it is characterized in that: described urea depression dust-removing system contains three cyclone dust collectors, is respectively dry cyclone dust collectors (1), cooling cyclone dust collectors (6) and dedusting cyclone dust collectors (7).

3. urea depression dust-removing system according to claim 1 is characterized in that: described dust produces position (8) and comprises drying machine, cooler and dust collection point.

4. urea depression dust-removing system according to claim 1, it is characterized in that: described vibrator (9) is vibrating motor or electromagnetic vibrator.

5. urea depression dust-removing system according to claim 1, it is characterized in that: described closing device (10) is weight turner or electric butterfly valve.

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