CN202638153U - High-efficiency long-bag low pressure pulse bag-type dust remover - Google Patents

Abstract

The utility model discloses a high-efficiency long-bag low-pressure pulse cloth bag dust collector, relates to a long-bag low-pressure pulse cloth bag dust remover, and solves the problem of blowing holes on each blowing pipe in the pulse dust cleaning device in the prior art. The amount is not equal, and the bag cannot be cleaned evenly and fully, which will affect the dust removal efficiency of the dust collector. The utility model consists of a compressed air system, a steel bracket for a bag-type dust collector, an upper box body, a lower box body, an instrument detection device, a lift valve device, a bypass valve device, a pulse valve, a pulse air bag, a blowing pipe device, and a filter bag device. etc., the blowing pipe device is provided with a round hole, and a short pipe is connected to the round hole to form a nozzle. Along the direction of the pulse air flow, the diameter of the round hole on the blowing pipe device decreases successively. In the dust cleaning device of the utility model, the air volume and blowing pressure sprayed by each blowing hole on each blowing pipe to each cloth bag are basically the same, so that each cloth bag can be fully cleaned and the efficiency of the dust collector is improved.

Description

A kind of efficient long bag low-pressure pulse bag filter

Technical field

The utility model belongs to the industrial dedusting technical field, relates to a kind of deashing device of long bag low-pressure pulse bag filter, the architecture advances of the injection hole that particularly arranges on the injection tube in a kind of long bag low-pressure pulse bag filter deashing device.

Background technology

The deashing of sack cleaner is the key technology of sack cleaner, and the quality of sack cleaner ash-removal effect has considerable influence to efficiency of dust collection, and the deashing of sack cleaner is finished by the pulse jet system.In the prior art, because it is identical that injection tube arranges the winding-up aperture, the gas of every injection tube is ejected into one and arranges in the bag in injection system, is ejected into each filter bag tolerance and does not wait, along the pulse qi of chong channel ascending adversely flow path direction, the jet amount of front end is generally less, and terminal jet amount is larger, like this, the cloth bag that causes being positioned at front end can not get sufficient deashing, dust is deposited on the cloth bag surface gradually, makes a part of cloth bag cisco unity malfunction, can not give full play to the effect of each cloth bag.If the winding-up amount is excessive, concentrate, it is very large to be positioned at the terminal jet amount of injection hole, and it is very fast damaged to cause the terminal filter bag of injection tube to occur, and need often change bag, and economic loss and soot emissions exceed standard; If the winding-up amount is too small, the filter bag surface dirt is not got off clearly, and it is blocked up that dust is attached to the filter bag surface, and equipment resistance increases, and the Bag filter effect is bad, and efficiency of dust collection significantly descends.The spray angle of injection hole pipe and filter bag length one regularly, whether the gas emitted dose in each hole uniform on every injection tube just seems particularly important.By improving the diameter of injection hole on the injection tube, can make the gas emitted dose of each injection hole even, make all cloth bags all obtain sufficient deashing, thereby improve bag-type dust efficient.

The utility model content

The utility model purpose is to have overcome the defective that above-mentioned prior art exists, provide a kind of ash-removal effect good long bag low-pressure pulse bag filter, in this long bag low-pressure pulse bag filter, it is basic identical that injection hole on the every injection tube in the injection system is ejected into the tolerance of each cloth bag, jetting pressure is basic identical, so that the ash-removal effect of each cloth bag improves greatly, a kind of efficiency of dust collection is high, dust emission concentration can reach the long bag low-pressure pulse bag filter near zero-emission thereby provide.

For achieving the above object, the utility model adopts following technical scheme:

A kind of efficient long bag low-pressure pulse bag filter is comprised of sack cleaner ash precoating device, electric autocontrol device, compressed air system, sack cleaner steel bracket, upper box, lower box, instrument checkout gear, poppet valve device, bypass valve device, pulse valve, pulse gas bag, injection tube device, filter bag device, air inlet adjustment valve plate, flue gas inlet duct, ash bucket; Lower box comprises column, all around wallboard, intermediate plate, and wallboard and intermediate plate are organized in lower box and consisted of the dust chamber that is isolated from each other all around, and lower box is fixed on sack cleaner steel bracket top, and is connected around the ash bucket; The filter bag device is comprised of filter bag and a bag cage, and the top sack of filter bag is fixed on the card between upper box and the lower box, and a bag cage is enclosed within on the filter bag, plays a supportive role; Instrument checkout gear, poppet valve device, bypass valve device, pulse valve, pulse gas bag, injection tube device are installed on the upper box, pulse valve links to each other with the pulse gas bag by flange, a pulse gas bag is connected with set of pulses valve, pulse gas bag, pulse valve, injection tube device connect successively, form soot cleaning system with compressed air system, the injection tube device is provided with circular hole, be connected with short tube at circular hole, form nozzle, along the pulse qi of chong channel ascending adversely flow path direction, the Circularhole diameter on the described injection tube device successively decreases successively.

The diameter of the injection tube in the described injection tube device is 89 millimeters.

Because the Circularhole diameter on the utility model injection tube along the pulse qi of chong channel ascending adversely flow path direction successively decreases successively, like this, so that on every injection tube each injection hole to be ejected into the tolerance of each cloth bag basic identical, jetting pressure is basic identical, thereby so that each cloth bag all obtains sufficient deashing, improve ash-removal effect, improved the dust removing effects of whole sack cleaner.After testing, a kind of efficient long bag low-pressure pulse bag filter dust removal efficiency of the utility model reaches 99.99%, and dust emission concentration can reach 20mg/m ³Below, even basically can be near zero-emission.To the very large fine particle PM2.5～PMIO of human respiratory harm, sack cleaner has very high capture effect.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a kind of efficient long bag low-pressure pulse bag filter structural representation of the utility model;

Fig. 2 is Fig. 1 side view.

Each sign expression among the figure:

1, ash precoating device; 2, electric autocontrol device; 3, compressed air system; 4, sack cleaner steel bracket; 5, upper box; 6, lower box; 7, instrument checkout gear; 8, poppet valve device; 9, bypass valve device; 10, pulse valve; 11, pulse gas bag; 12, injection tube device; 13, filter bag device; 14, air inlet adjustment valve plate; 15, flue gas inlet duct; 16, ash bucket.

The specific embodiment

As depicted in figs. 1 and 2, a kind of efficient long bag low-pressure pulse bag filter of the utility model, lower box 6 by channel steel upright post, wallboard is welded all around, welds card between the top of lower box 6 and the upper box 5.Lower box 6 is divided into several dust chambers by median septum, and each chamber is mutually airtight.Be arranged as the air inlet flue at lower box 6 along the housing longitudinal middle part, flue gas advances from the bottom, and top goes out.Welding around the bottom collar tie beam of lower box 6 and the ash bucket 6, filter bag device 13 is comprised of filter bag and a bag cage, and the top sack of filter bag is fixed on the card between upper box 5 and the lower box 6, and a bag cage is enclosed within on the filter bag, plays the effect of support filter bag; Instrument checkout gear 7, poppet valve device 8, bypass valve device 9, pulse valve 10, pulse gas bag 11, injection tube device 12 etc. are installed on the upper box 5.Pulse valve 10 links to each other with pulse gas bag 11 by flange, and a pulse gas bag 11 is connected with set of pulses valve 10, and pulse gas bag 11, pulse valve 10, injection tube device 12 connect successively, forms soot cleaning system with compressed air system 3.Ash-laden gas enters from lower box 6 middle part flues, after deflector evenly distributes air-flow, enter ash bucket 16 each unit by flue gas inlet duct 15, the filter bag of bagging apparatus 13 is filtered outward after filtration, and clean flue gas enters upper box 5 and discharged by air outlet by filter bag, card hole.It is that the steel pipe of 89mm is made that injection tube in the pulse blowing pipe device 12 adopts diameter, is provided with circular hole in injection tube, and connecting a diameter at circular hole is 1 cun short tube, forms nozzle.Along the pulse qi of chong channel ascending adversely flow path direction, the Circularhole diameter on the injection tube device 12 successively decreases successively.When the gas with certain pressure sprays to cloth bag by the circular hole of certain jet angle on injection tube device 12, compressed air is through nozzle directive filter bag, inject filter bag inside with the ambient gas of its injection, cause filter bag comprehensively shake and formation blowback airflow function from inside to outside, under the acting in conjunction of acceleration that filter bag expand to produce and back draught, the dust that is attached to the filter bag outer surface breaks away from filter bag and falls into ash bucket, delivers to ash-storing bin by ash-transmission system.Because qi of chong channel ascending adversely flow path direction along the pulse, Circularhole diameter on the injection tube successively decreases successively, the nose circle bore dia is larger, terminal Circularhole diameter is less, like this so that the throughput that each circular hole is ejected into each cloth bag on injection tube be close uniformly so that each filter bag all obtains sufficient deashing, thereby prolonged life of bag filter, make the work of sack cleaner be in optimum state, can reach higher efficiency of dust collection.Dirt gas enters each filter chamber, unit by mozzle, because, there is enough reasonably headroom at the bag end from air inlet vertical range suitable for reading in the design, the filter bag spacing has also been carried out specialized designs, air-flow is by after being arranged at the intake air distribution system water conservancy diversion in the ash bucket, rely on Drag distribution principle NATURAL DISTRIBUTION, reach being evenly distributed of whole filtration indoor air flow and each space resistance, guarantee rational plume rise speed, reduce to greatest extent turbulent flow, prevent reentrainment of dust.Pulse valve 10 is key equipments of pulse ash remover, it select the ash-removal effect that is related to deduster.Pulse valve l0 selects 3 cun quick type submerged electromagnetic pulse valves of low pressure.Self resistance is little, rises and closes rapidly.Be 1,000,000 service life, satisfied the efficient service requirement of pulse valve, greatly reduced maintenance workload.

The pulse dust cleaning of sack cleaner electric autocontrol device 2 control dedusters.The PLC automated manner is adopted in the pulse dust cleaning control of deduster, and pressure reduction and timing controlled mode are adopted in control automatically.Automatically during control, when reaching the pressure difference of setting or during the time cycle, each chamber of deduster is carried out pulse jetting deashing successively, and the selection of deashing state is realized by PLC.The deashing program implementation is realized by master control cabinet (PLC).Dust collector ash hopper is established high charge level and low material level indication, and the material level signal shows and warning at the machine room switch board.Deashing gas circuit and lifting cylinder gas circuit arrange pressure transmitter, and pressure ratio sets value high or low alarm.

Claims (2)

1. A high-efficiency long-bag low-pressure pulse bag filter, which consists of a bag filter pre-coating device [1], an electrical automatic control device [2], a compressed air system [3], a bag filter steel bracket [4], Upper box body [5], lower box body [6], instrument detection device [7], poppet valve device [8], bypass valve device [9], pulse valve [10], pulse air bag [11], spray valve Blowpipe device [12], filter bag device [13], air intake control valve plate [14], flue gas air intake device [15], ash hopper [16]; the lower box includes columns, surrounding wall panels, and middle panels , the surrounding wall panels and intermediate panels are assembled in the lower box [6] to form a dust collection room isolated from each other, and the lower box [6] is fixed on the upper part of the steel bracket [4] of the bag filter and connected with the ash hopper [16] The filter bag device [13] is composed of a filter bag and a bag cage, the upper pocket of the filter bag is fixed on the flower plate between the upper box body [5] and the lower box body [6], and the bag cage is set on the filter bag , plays a supporting role; instrument detection device [7], poppet valve device [8], bypass valve device [9], pulse valve [10], pulse air bag [11], blowing pipe device [12] are installed on the upper box On the body [5], the pulse valve [10] is connected with the pulse gas bag [11] through the flange, and a pulse gas bag [11] is connected with a group of pulse valves [10], the pulse gas bag [11], the pulse valve [10] ], the blowing pipe device [12] is connected in turn, and the dust removal system is formed with the compressed air system [3]. The blowing pipe device [12] is provided with a round hole, and a short pipe is connected to the round hole to form a nozzle. It is characterized in that , along the pulse air flow direction, the diameter of the circular hole on the blowing pipe device [12] decreases successively. 2. A high-efficiency long-bag low-pressure pulse bag filter according to claim 1, characterized in that the diameter of the blowing pipe in the blowing pipe device [12] is 89 mm. the

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