To whom it may concern Apr.24.2018

Light Scattering Method Dust Density Meter(Relative continuous measuring monitor system)

Model

ＤＤＭ－ f C

Technical Introduction
R&D , Manufacture , Sales , MaintenanceTanaka Electric Laboratory Co., Ltd.

Table of contents• Corporate profile• Necessity of dust density meter for CEMS
• Type of dust density meter• About our model : DDM-fC• Recent news! JIS B7996• Installation photos• Customer list

Corporate profile
Established 17.Dec. in 1963
Capital 25,000,000 JPY
Employee

35

Business Scope :1. Dust density meter R&D, manufacture2. Electronics instruments design &manufacture for industry use
3.PCB design , mounting & soldering.

About CEMS (Continuous Emission Monitoring System)■ CEMS is an equipment used to measure emissions
discharged from stationary sources.
■ CEMS helps in the continuous assessment ofpollutants discharged into the atmosphere in theform of exhaust gases from combustion orindustrial processes.
■ Initially, CEMS was used to monitor oxygen,carbon dioxide, carbon monoxide.
■ Currently, CEMS including dust is used to adhere
to air emission standards.

CEMS Instruments
Our Products

HCl Gas analyzer

Dust density meter DDM-fC
NOx, SO2 , CO, CO2, O2 Gas analyzer

A lot of dust from chimney !

The emitted dust exceeded the applicable limit concentrations,the residents in adjacent plants will complain to the relevant
authorities.

Type of dust density meter
Advantage: Cheap
Disadvantage : The detection
sensitivity is low, and optical axis
shifts.

① Optical
penetration type
② Electrode type

Advantage : Easy installation.
Disadvantage : The moisture influences to the output
signal. This type cannot be span-calibration underplant operation.
Our system !
③ Light scattering type

Advantage: Low concentration can be measured.
The correlation coefficient is high.
Disadvantage: Multiplex scattering appears over about
500mg/Nm3 .
Note: The typical dust limits for industries in Malaysia
is 50mg/Nm3.
Light scattering type is suitable !

About our model DDM－fC( Main body control box and purge air system box )Purge air system box

Main body control box

1) Our DDM-fC is non-sampling method dust density meter.
2) It is easy to be installed and maintained.
3) There is no optical shifts and influence from moisture,4) It is possible to zero-calibrate the system and adjust the measurement spanunder different plant operating conditions, such as high pressure (up to246kPa) or high temperature (typically 380℃, optional up to 820℃) .
5) Our design concept is easy maintenance for a long time in plants. Selected
general purpose parts as consumer matter such as halogen lamp & motor.

Easy installation
Installation on the duct is only one place, the optical axis match is unnecessary.
The air piping also. By using existing handrail, it is very easy to install. The
construction cost will be half compared to the optical penetration type.

A hole making to the duct, andwelding of a detector attachment
flangeAttach the detector head

Inside of duct

Wiring,piping and install the optical fiber cables.

Calibration (It is possible to adjust zero & span under plant operating.）

It is possible to connect to the calibration box by removing optical fiber
cables from detector head even if flue gas flows.

Under high pressure 246kPa、 20%CO gas
Calibration by safety. (Blast furnace plant)Three-dimensional measurement range image of back scattering type
dust density meter detector (DDM-fc)
Our DDM-fc uses a halogen lamp with overwhelmingly large amount of light as a light source.

Projected light zone

Light receiving zone
Note :This figure shows DDM-2001■ Measuring zone is the area where the projected light and crossing with the light receiving.
■ This is very high volume zone.
■ This means, our DDM-fc is very high sensitivity instrument.

Light scattering method : comparison between sampling method and non-sampling our DDM-fc.
... The sampling type only measures the nozzle inlet for aspirating dust particles, so there is littlechange in output signals. Meanwhile, our company's non-sampling type has a wide measuring range,
so the indication change can be seen largely.
Coal fired electric power station. Inlet of FGD.
70
既設ばいじん計（柴田）DDM-fc
仮設ばいじん計（田中）Other maker’s sampling type60

(light scattering type )ばいじん濃度（mg/m3)
Dust density meter
output

50

40

30

20

100
2016/8/4 23:31

2016/8/5 1:55

2016/8/5 4:19

Time

2016/8/5 6:43
時刻

2016/8/5 9:07

2016/8/5 11:31

Measurement data (tendency management)

Unusual state

Data after bag filter repair

The continuous dust monitor is an important tool to schedulepreventive maintenance.
As a result of performing preventive maintenance on the dust collector
systems (EP and FF)*, undesirable discharge of high loadings of dust to
the atmosphere can be effectively prevented.
* EP: Electrostatic Precipitators FF: Fabric Filter same as Bag Filter

Recent News!
• JIS B7996 will be effective in 2018
[Performance evaluation test method of automatedconcentration monitoring instrument of dust in flue gas.]
Tanaka Electric Lab. offered to make a Japan Industries Standard (JIS)about dust density meter’s evaluation method to METI in 2016.
(METI: Ministry of Economy, Trade and Industry in Japan)• This is the first standard of dust density meter’s
performance for type approval test.
• The most important point is a correlation coefficient
between isokinetic sampling method and automated dust
monitor. This must be over 0.9 by actual method by using
test duct at laboratory.

Test duct at Tanaka electric lab. in Karasuyama factory.

Duct : Straight length is 4,225mm , diameter is 300φ

Test for getting correlation coefficient
between isokinetic sampling method andautomated dust monitor.
Dust feeder

Our dust monitor DDM-2001(same as DDM-fC)
Isokinetic sampling method probe

Other maker’s electrode type dust monitor

ダスト濃度（JIS Z 8808)
mg/m3

ダスト濃度計（DDM-2001)
指示値（％）

フライアッシュ
10種

8.6
7.2
7.3
6.6
16
15
16
1720
21
2220
40
36
36
37

7.668
7.432
6.899
6.889
15.69815.68915.33015.51221.22219.66819.42419.36134.85833.99233.69132.551

相関係数

0.994

3
Isokineticダスト濃度,mg/mdust

試験用粉体

45y = 1.12x - 1.15
R = 0.994

403595% confidence interval

30252015Tolerance interval

105DDM-2001 output

0010203040

ダスト濃度計指示値（％）

解説図9－校正曲線
LinearCalibration Curve

Correlation Coefficient between isokinetic sampling and DDM-2001.
Result is very high 0.994 and linear calibration curve is narrow.

3Isokineticダスト濃度,mg/m
dust

4540y = 0.528x - 2.41
R = 0.969

3530252015105Electrode type output

00204060

ダスト濃度計指示値（％）

解説図11－校正曲線

Linear Calibration CurveCorrelation Coefficient between isokinetic sampling and electrode type.
Result is 0.969 and linear calibration curve is wide.

Correlation coefficient between isokinetic sampling (JISZ8808 )DDM-2001 VS. Optical penetration
碧南 手分析相関図
Coal fired electric
power station

I.e. JISZ8808 in
Japan or equivalentmethod MalaysianStand, MS 1596 as
required by law inonly an ad-hoc
analysis conducted
several times peryear

30
y = 13.889x + 4.1712
R2 = 0.9332

25

Dust density
meter output (%)
煤塵計指示（％）

Tanaka electric lab.DDM-2001

20y = 3.5261x + 7.2289
R2 = 0.7682

1510Oki electric optical penetration WX1028

5DDM2001

既設線形 (DDM2001)

線形 (既設)000.5

1Isokinetic sampling dust手分析値（ｍｇ/ｍ３N)
density

1.52

Note :model DDM-2001 is the same electronics circuit as DDM-fC

Comparison data with opticalpenetration dust density meter（Heavy oil electric power station.）
Generator output trend graph
Dust density meter installed to the outlet
duct of Desulfurization unit.
Dust density is under 1 mg / m3N
Other company’s optical penetration
type dust density meter output.
(Synchronization with the operating
condition is indefinite). trend databelow.
記録計の時計が約 15分進んでいます

DDM-2001 output trend data
（Synchronized with the operationcondition.）
Note :model DDM-2001 is the same electronics circuit as DDM-fC

Comparison data with optical penetration dust density meter（Coal fired electric power station）
Duct size is 8m

Optical penetration type dust
density meter output.

Measurement data near duct wall by
DDM-2001. The same trend data as
optical penetration type.
The sensitivity is higher than theoptical penetration type .

The same measurement was able tobe done with the optical penetration
type that measured the width of duct
and light scattering type thatmeasured near the wall of duct.

Note :model DDM-2001 is the same electronics circuit as DDM-fC

Installation photos.

Installation at Cement plant 1

AQC(Air Quenching Cooler) EP outlet stack

The measurement is possible without being
affected by the sun light.

Detector head
installed at duct openend.

＊Note :This photo is DDM-2001 modelInstallation at Cement plant 2Mill bag filter outlet duct. Ryukyu Cement in Okinawa.

＊Note :This photo is DDM-2001 model

Detector head attached near end of duct.

Installation at Cement plant 3Mill bag filter outlet duct. Ryukyu Cement in Okinawa.

＊Note :This photo is DDM-2001 modelInstallation at Cement plant 4
CFB boiler bag filter outlet duct at Taiheiyo Cement Saeki plant in Kyusyu

CFB: Circulating Fluidized Bed boiler

Installation at Cement plant 5

Kiln cooler EP outlet duct at Mitsubishi material Iwate factory.

Installation at Electric power station 1

Coal electric power EP outlet

Heavy oil electric power EP outlet＊Note :This photo is DDM-2001 modelInstallation at electric power station 2

J-POWER Isogo Coal fired electric power plant near Tokyo

Cyubu electric and Okinawa electric oil fired power plantInstallation at Iron furnace

Kobe steel Kakogawa plantsinter plantsinter plantInstallation at Refinery
Detector attached to the concrete duct via stainless steel plate.

Customer list 1
Mitsubishi material Corp. Yokoze

Sludge incinerator Jyounanjima Tokyo

Mitsubishi material Corp. Kyusyu

Sumitomo osaka cement Co. Kochi

Cyugoku electric power Co. Ube

Iwaki daio paper Co. Iwaki

Onoda cement Co. Tsukumi

Sumitomo osaka cement Co. Tochigi

Ube kosan Co. Kanda,Kyusyu

Sumitomo metal industries Co. Kokura

Sumitomo metal industries Co. Kashima

Hachinohe cement Co. Hachinohe

Aso cement Co. Kanda,Kyusyu

Okinawa electric power Co. Kin

Ryukyu cement Co. Okinawa

Oji paper Co. Kasugai

Chichibu onoda cement Co. Chichibu

Nippon Seiko Co. Nakase

Mitsubishi material Corp. Kurosaki

Chichibu taiheiyo cement Co. Chichibu

Myojyo cement Co. Itoigawa

Mitsubishi material Corp. Kyusyu

Dai showa peper making mfg.Co. Fuji

Kyoei steel Co. YamaguchiTaiheiyo cement Co. Chichibu

Asahi glass Co. Keihin

Asahi glass Co. Sagami

Mitsui mining/Mitsui mike
manufacture Co. Omuta

Nippon steel chemical Co. Kimitsu
Nissshin steel Co. Kure

Mitsubishi material Corp. Naojima

Industrial garbage incinerator Kagoshima
Nikko metal Co. Saganoseki

Hokkaido electric power Co. Naie plant

Birla cement works chittorgarh

Iwaki daio paper Co./ MHI Yokohama

Tokuyama Corp. (soda) Tokuyama

Cyubu electric power Co, Atsumi plant

Bridgestone Corp. Hikone

Kyusyu electric power Co. karita plant

Tokuyama Corp.(cement) Nanyo

Cyubu electric power Co, Chita plant

Shinryo alumi recycle Co. Oyama

JFE Bars & Shapes Corp. Sendai

Taiheiyo cement Co. Saitama plant

Taiheiyo cement Co. Tosa plantJ-power Co. Matsuura power plant

Taiheiyo cement Co. Saiki plant

Kyoei steel Co. Nagoya

Nippon steel & Sumitomo metal Co.,Ltd.

Eco energy Japan Co. Chiba

Ube kosan Co. Ube IPP electric plant

JFE steel Co. Chiba, Fukuyama

Cyubu electric power Co,Nishi nagoya plant

Oji paper Co. Kasugai/MHI Yokohama

Hokuriku electric power Co,Nanaooota plant

Kobe steel Co. Kakogawa

Nippon paper Co. Ishinomaki plant

DC Co. Kawasaki cement plant

Yoshino Gypsum Co. Saitama plantKansai thermo chemical Co, Kakogaw

Usha Martin Jamshedpur,India

295 units in Apr.2018

EGAT Mae Moh coal electric fire power plant
Ulaanbaatar No.4 power station in Mongol

Thank you for the attention!