CN201140111Y

CN201140111Y - High voltage commutation direct current return circuit series filter arrangement for electrostatic dust collection

Info

Publication number: CN201140111Y
Application number: CNU2008200818157U
Authority: CN
Inventors: 赵西平
Original assignee: Zhejiang Guangtian Transformer Co Ltd
Current assignee: Zhejiang Guangtian Transformer Co Ltd
Priority date: 2008-01-01
Filing date: 2008-01-01
Publication date: 2008-10-29
Anticipated expiration: 2018-01-01

Abstract

Disclosed is an electrostatic precipitation high-voltage rectification DC circuit combo filtering device, which comprises that a booster transformer T<1> is connected with full-wave rectifiers VD<1>, VD<2>, VD<3> and CD<4>, and the full-wave rectifiers are connected with a precipitation static electrode plate Q. The filtering device is characterized in that filters W are installed on circuits of the full-wave rectifiers VD<1>, VD<2>, VD<3>, CD<4> and the precipitation static electrode plate Q. The filtering device can obtain straight output voltage, with less AC components and fine precipitation efficiency.

Description

Electrostatic precipitation high-voltage rectifying DC loop string filter

Technical field

The utility model relates to electrostatic precipitation high-voltage rectifying DC loop string filter, can be applicable to the electrostatic precipitation of industries such as thermal power plant, building materials manufacturing, chemical industry.

Background technology

Building material industry such as thermal power plant, cement plant, Chemical Manufacture industry etc. are because dust is many in the air of discharging, so need the configuration high-voltage electrostatic dust separator.It is that the high side voltage of single-phase step-up transformer is carried out the voltage that produces after the full-wave rectification that the high voltage electric field of existing electrostatic precipitator uses, owing to be full-wave rectification, thereby voltage just has ripple component.Thereby the fixed DC voltage that weighed originally is to after the finishing of the charging of certain value electric capacity, thinking does not in theory have electric current, but because the existence of pulsation alternating component after the full-wave rectification, thereby after rectification, the composition that must also have an interchange, thereby along with its useless AC energy that needs of the increase of plates capacitance amount just the capacity of transformer also increasing, three at least in the transformer that one of adds a large-scale dedusting needs, more than ten at most, total AC energy is the power consumption of a very jumbo no useful use from 200 kilovolt-amperes to 1500 kilovolt-amperes.Particularly all-wave exchange its voltage change of ripple component from zero to 1.414 times of virtual value, when voltage is low, can not make dust effectively charged and seizure in deduster, and swoon and discharge higher can the generation than forceful electric power of voltage, thereby produce the low of unnecessary waste of energy and efficiency of dust collection, can not reach desirable dust removing effects, and expend more electric energy.Existing electrostatic precipitation high pressure full-wave rectification technology exists following shortcoming: the one, bigger ripple component is arranged after the rectification, and the deduster pole plate that DC voltage applies is equivalent to capacitor plate, ripple component wherein will be passed through at the electric capacity that pole plate produces, thereby need certain AC power to keep the generation of this process, because deduster is huger, keeps the AC power that this DC electric field need expend bigger no benefit; The 2nd, after the single-phase full wave rectification because wherein ripple component is bigger, its voltage change is from the effective voltage of 0%-141%, electric field in the deduster body also changes in this scope, just very weak when the low-voltage to the capture ability of dust, and voltage can produce the corona and the electric spark of high frequency time when high voltage, dust removing effects is reduced, produce bigger electric energy loss, that is to say, voltage is lower than average voltage and to be higher than average voltage to a certain degree low to the situation of dust removing effects all can be than the fixed voltage of weighing apparatus the time, and the electric energy during the flashover phenomenon when voltage is higher expends will significantly be increased, and this kind situation will be than voltage weighing apparatus timing efficiency of dust collection low about 30%; The 3rd, because being the impedance of capacitive load and transformer, the deduster body generally is 25%, thereby is equivalent to short circuit that the overcurrent multiple is bigger, and is bigger to the infringement of rectifying device in the moment of energising.And the electric spark that produces in dust removal process, flashover all can produce over-current shock, the possibility of the device failure of traditional full-wave rectification is bigger, so device has all been used the high-current rectifier spare that surpasses its operating current far away in order to ensure using, and guarantees the safe operation of rectifier.

Summary of the invention

The purpose of this utility model is in order to overcome the shortcoming that prior art exists, to provide a kind of high-voltage rectifying part electric current straight, and AC compounent is few, the electrostatic precipitation high-voltage rectifying DC loop string filter that efficiency of dust collection is good.

The technical scheme of the utility model electrostatic precipitation high-voltage rectifying DC loop string filter is: comprise step-up transformer T ₁Connect full-wave rectifier VD ₁, VD ₂, VD ₃, VD ₄, full-wave rectifier connects dedusting static pole plate Q, it is characterized in that full-wave rectifier VD ₁, VD ₂, VD ₃, VD ₄With wave filter W is installed on the circuit of dedusting static pole plate Q.

Electrostatic precipitation high-voltage rectifying DC loop string filter of the present utility model is by step-up transformer T ₁The input voltage of determining is boosted, after being elevated to needed voltage, again by full-wave rectifier VD ₁, VD ₂, VD ₃, VD ₄Carry out rectification, after its rectification, use big capacity wave filter (filtering energy-storage reactor) again, obtain comparatively straight output voltage and less output current its filtering.Use detection according to reality, low pressure input power and transformer capacity have only the 1/3-1/4 of existing product, and efficiency of dust collection improves more than 30%, and guarantee the security of high-voltage rectifying components and parts.

Description of drawings

Fig. 1 is the utility model electrostatic precipitation high-voltage rectifying DC loop string filter circuit diagram.

The specific embodiment

The utility model relates to electrostatic precipitation high-voltage rectifying DC loop string filter, as shown in Figure 1, comprises step-up transformer T ₁Connect full-wave rectifier VD ₁, VD ₂, VD ₃, VD ₄, full-wave rectifier connects dedusting static pole plate Q, it is characterized in that full-wave rectifier VD ₁, VD ₂, VD ₃, VD ₄With wave filter W is installed on the circuit of dedusting static pole plate Q.This programme is by step-up transformer T ₁The input voltage of determining is boosted, behind the required making alive that raises, again by full-wave rectifier VD ₁, VD ₂, VD ₃, VD ₄Carry out rectification, after its rectification, use big capacity wave filter (filtering energy-storage reactor) again, obtain comparatively straight output voltage and less output current its filtering.Wave filter specifically be configured to prior art, purchase in market.Use detection according to reality, low pressure input power and transformer capacity have only the 1/3-1/4 of existing product, and efficiency of dust collection improves more than 30%, and guarantee the security of high-voltage rectifying components and parts.

Claims

1, electrostatic precipitation high-voltage rectifying DC loop string filter comprises step-up transformer (T ₁) connection full-wave rectifier (VD ₁, VD ₂, VD ₃, VD ₄), full-wave rectifier connects dedusting static pole plate (Q), it is characterized in that full-wave rectifier (VD ₁, VD ₂, VD ₃, VD ₄) with the circuit of dedusting static pole plate (Q) on wave filter (W) is installed.