> My factory Phi 2.2×18m crude material rubs the
tail originally to use the common electric precipitator to carry on
the dust removal. Although has the certain effect, but because
the failure rate is high, could not solve 排空 the dust
environmental pollution problem, was compelled for a long time with
自然通风, caused the grinding machine 通风?not to be able to
satisfy the request, often appeared full rubs the phenomenon, affected
the grinding machine the revolution rate. Based on this kind of
situation, according to the scene concrete condition, my factory has
used the Cangxian scientific research institute's transistor high
pressure electrostatic precipitator. After the investment use,
is qualified after the city environmental protection bureau approval,
the test result indicated, in the waste gas contains the dust density
52.3mg/Nm3, dust removal efficiency is above 99.8%. This article
mainly unifies my factory service condition, performs to the
transistor high pressure electrostatic precipitator characteristic to
introduce.
1 transistor high pressure electrostatic precipitator principle
of work
This dust remover and common electric precipitator
principle of work same, but the work power source and the common
electrostatic precipitator power source is different, this kind of
power source belongs to the soft characteristic, is different to the
current hard characteristic power source. First it is exchanges
50Hz, the 220V loss of voltage to several dozens volts, becomes the
low pressure direct-current power supply after the rectification
filter, then the supplies transistor oscillator, while will enhance
the frequency 电压?to more than 10,000 volts, again the process
will double the pressure levelling circuit, will become the stable
100,000 volt direct current high pressure. Its electric circuit
structure is simple, does not need to set up the complex spark
automatic tracking and the suppression system, can the automatic
control output voltage, cause the output the high-tension current
completely all is the corona current. The theoretical analysis
and the actual test data all indicated this dust removal work power
source output voltage high, voltage waveform straight, the power
damages 失少, the transfer efficiency is high, is one kind of high
efficiency low cost new power source.
2 transistors high pressures electrostatic precipitator
performance specification
(1) pattern: Single room three electric fields;
(2) electric field sectional area: 16m2;
(3) processes the waste spirit: 20000m3/h;
(4) electric field wind speed: 0.35m/s;
(5) electric field 极距: 0.4m;
(6) dust in electric field resident time: 18s;
(7) electronics corona extremely: Stainless steel awn
barbed wire, its effective length 448m;
(8) receives the dust extremely: 金属? total area
60m2;
(9) inspires hits the way: Uses the B - 0.5 plate
vibrator, electric motor power 0.8kW, the vibration frequency is 2,800
/min;
(10) high-voltage power supply unit: JG - 2 100kV/10mA,3;
(11) the entrance contains the dust density: < 100g/Nm3;
The exportation contains the dust density: < 150mg/Nm3;
(12) shell size: 6410×4480×4950mm;
(13) equipment gross weight: 20t.
3 transistors high pressures static electricity dust removal
system heat preservation measure
Does the dust removal system heat preservation question,
whether relate removes dust the equipment normally to use. In
our country north, this question outstandingly. The heat
preservation question has solved, the dust removal system condensation
question also is solved.
3.1 blast pipes and dust remover heat preservations
Grinding machine in revolution because 钢球 the
impact, the abrasive action, the material while which degrades in size
can produce the massive quantity of heats in, along with rubs
temperature elevating, in the material residual moisture content is
evaporated, therefore forms in rubbing contains the dust the hot and
damp gas. When the dust remover moves in, rubs the hot and damp
gas experience to enter in the dust remover through the blast pipe, in
order to does not reduce the stream temperature, should take the heat
preservation measure, the heat preservation method is: Surrounds
a galvanized iron sheet outside the shell, its connection external use
rivet connection, the shell and among the periphery circle band fills
the crag cotton and kapok. The crag cotton and kapok is the
thermal conductivity lower thermal insulation material, the heat
preservation effect is better.
3.2 unloads 灰斗 heat preservation
Unloads 灰斗 the heat preservation by heats up and
keeps warm two parts to be composed, namely besides in 灰斗 Bao
Fuyan outside cotton and kapok heat preservation felt heat insulating
layer, but also in 灰斗 lower part outside periphery uses
electricity the heat pipe to heat up, this means effectively enhanced
unloads 灰斗 the temperature, solved has returned to the ash to
agglomerate the question which produced because of the condensation.
4 uses effects
The transistor high pressure electrostatic precipitator
after the crude material rubs the tail to put into the use, receives
the dust effect remarkably, basically has solved the environmental
pollution which the grinding machine created, simultaneously recycled
the massive crude materials, reduced each kind of raw material and the
power consumption, has saved the maintenance cost; Strengthened
the grinding machine to ventilate, enhanced the grinding machine
revolution rate, thus reduced the ton cement production cost.
After the determination, this dust remover entrance dust density
is the 40.3g/Nm3, exportation dust density is the 52.3mg/Nm3, amount
of wind is 15880Nm3/h, receives the dust efficiency to achieve above
99.8%, each hour may recycle crude material 639kg. In 1992 this
grinding machine actual operation 7216h, year recycling crude material
4611t, according to 25 Yuan /t crude material computation, the year
recycling crude material value might amount to 115,000 Yuan.
Above analyzes the proof, after this dust remover throws
transports, very quickly displays the obvious social efficiency and
the economic efficiency.
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