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Plate-type DeNOx catalysts
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GB/T 31584-2015: PDF in English (GBT 31584-2015) GB/T 31584-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.99
G 75
Plate-type DeNOx catalysts
平板式烟气脱硝催化剂
ISSUED ON. JUNE 02, 2015
IMPLEMENTED ON. JANUARY 01, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
3. No action is required - Full-copy of this standard will be automatically &
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Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Product specifications ... 7
5 Requirements... 7
6 Test methods ... 9
7 Inspection rules ... 15
8 Marking, packaging, transportation and storage ... 16
9 Product accompanying documents ... 17
Annex A (informative) Flue gas composition analysis methods ... 18
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard is proposed by China Petroleum and Chemical Industry Association.
This Standard is under the jurisdiction of National Standardization Technical
Committee of Chemical (SAC/TC 63).
Drafting organizations of this Standard. Datang Nanjing Environmental Protection
Technology Co., Ltd., Guodian Environmental Protection Research Institute, Xi'an
Thermal Power Research Institute Co., Ltd., Zhejiang Tuna Environmental Protection
Technology Co., Ltd., Research Institute of NCIG.
Main drafters of this Standard. Jiang Xiaoming, Xu Xusheng, Li Qian, Wang Hu, Li
Xiaohai, Zhu Lin, Kong Fanhai, Zhao Bo, Li Zhefei, Dong Xiaozhen.
Plate-type DeNOx catalysts
1 Scope
This Standard specifies the terms and definitions, product specifications, requirements,
test methods, inspection rules, marking, packaging, transportation and storage,
product accompanying documents of plate-type flue gas DeNOx catalysts.
This Standard is applicable for vanadium and titanium NH3 selective catalytic reduction
plate-type flue gas DeNOx catalyst.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the dated edition cited applies. For undated
references, the latest edition of the referenced document (including all amendments)
applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 19587 Determination of the specific surface area of solids by gas adsorption
using the BET method
GB/T 21650.1 Pore size distribution and porosity of solid materials by mercury
porosimetry and gas adsorption - Part 1. Mercury porosimetry
GB/T 31590 Analytical method of chemical composition of flue gas DeNOx catalysts
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
plate-type catalysts
DeNOx catalysts obtained by roasting after coating the active material on the surface
thereof with metal meshes as the base material.
3.2
NH3 selective catalytic reduction
DeNOx method that the ammonia reducing agent reacts with the nitrogen oxides to
produce nitrogen and water under the action of the catalyst.
3.3
plate
Catalyst plate formed by metal meshes with the surface evenly coated with active
components, folded and sheared according to a certain specification, which is the
basic component of plate-type catalysts.
3.4
element
Assembled by a certain number of catalyst plates in a metal box.
3.5
module
Assembled by a certain number of catalyst elements in a module box.
3.6
pitch
Distance between the center layer of two adjacent plates in the catalyst element.
3.7
geometrical specific surface area
The ratio of the total surface area of the catalyst channel for flue gas circulation to the
catalyst volume.
3.8
opening ratio
The ratio of the cross-sectional area of the catalyst channel for flue gas circulation to
the total cross-sectional area of the catalyst.
3.9
abrasion resistance
Ability of the active material coating on the surface to resist frictional force without
forming debris or powder when the plate-type catalyst is rubbed by external forces.
6.3.1.1.3 Electronic balance. accurate to 0.0001 g.
6.3.1.1.4 Drying oven (dryer).
6.3.1.1.5 Cutting machine.
6.3.1.1.6 Cone drill. with drill diameter of 8 mm.
6.3.1.2 Preparation of sample
USE a cutting machine to cut the sample with a length and width of 90 mm (excluding
the corrugated part) and smooth surface; USE a cone drill to drill holes at the center
of the sample. PLACE the sample after drilling into the oven; DRY at 60 °C for 30 min;
REMOVE the sample and PLACE it in the dryer for 30 min; SEAL and WEIGH. For
further use.
6.3.1.3 Determination procedure
FIX the sample in an abrasion tester at ambient temperature of 10 °C to 30 °C and a
relative humidity of 15 % to 75 %. The distance between the dust suction pipe and the
sample is 6 mm ± 0.5 mm, and the diameter of the dust suction pipe is 7.5 mm ± 0.5
mm.
During test, use rubber wheels with a hardness of 9 0HA ± 5 HA and a width of 13 mm
± 1 mm. The additional weight of the single grinding wheel is 750 g (the total weight of
the single grinding wheel and the total weight of the weight arm is 1.0 kg). The grinding
wheel speed is 60 r/min, and the number of revolutions is 300 r.
After grinding, PLACE the sample once again in the oven, DRY at 60 °C for 30 min,
and then PLACE the sample in the dryer for 30 min, SEAL and WEIGH.
6.3.1.4 Calculation of results
The abrasion resistance ζp of catalysts is expressed in milligrams per 100 revolutions
(mg/100 r), and calculated according to equation (3).
where.
m1 - the mass of the sample before test, in milligrams (mg);
m2 - the mass of the sample after test, in milligrams (mg);
n - the number of revolutions of the grinding wheel (n = 300 r).
6.4.2.5 Test
6.4.2.5.1 Determination of activity
After the completion of the aging, access all the gases according to the test
requirements in Table 4, stabilize and maintain for 1 h. DETERMINAE the
concentration of NOx in the inlet and outlet of the reactor once every 1 h. When the
results of 4 consecutive determinations do not have the same trend and the relative
deviation is less than 3 %, the NOx concentration test is completed. The arithmetic
mean of the results of 4 consecutive determinations is taken as the measurement
result.
6.4.2.5.2 Determination of SO2/SO3 conversion rate
After the completion of the activity determination, cut off the NH3 supply, and other flue
gas conditions remain unchanged, stabilize and maintain for 1 h. DETERMINAE the
volume fraction of SO3 in the inlet and outlet of the reactor and the volume fraction of
SO2 in the inlet of the reactor once every 1.0 h. When the results of 4 consecutive
determinations do not have the same trend and the relative deviation is less than 10 %,
the SO2/SO3 conversion rate test is completed. The arithmetic mean of the results of
4 consecutive determinations is taken as the measurement result.
6.4.3 Result calculation
6.4.3.1 Denitrification efficiency
The denitrification efficiency η of catalysts is calculated according to equation (4).
where.
C1 - the concentration of NOx (standard state, dry basis) in reactor inlet, in milligrams
per cubic meter (mg/m3);
C2 - the concentration of NOx (standard state, dry basis) in reactor outlet, in
milligrams per cubic meter (mg/m3).
6.4.3.2 Activity
When the NH3/NOx molar ratio is equal to 1, the activity K of catalysts is expressed in
meters per hour (m/h), and calculated according to equation (5).
7.2.2 Sampling and determination rules
7.2.2.1 Sampling rules
For plate-type DeNOx catalysts, each item is taken as a delivery batch, and catalysts
of not more than 150 m3 are taken as an inspection batch. Samples shall be marked
with item name, sampling date, sample person, etc.
7.2.2.2 Determination rules
Items fail the inspection shall be re-inspected with double sampling volume. If the re-
inspection result is qualified, then the batch of products is qualified; otherwise the batch
of products is unqualified.
7.3 Type inspection
The inspection items of the type inspection include all the items required in Clause 5,
and the inspection frequency of reaction performance is 2/delivery batch. The
inspection frequency of other items is shown in Table 5. The sampling and
determination rules shall be in accordance with the provisions of 7.2.2. Under normal
circumstances, carry out the type inspection once every six months, and the type
inspection shall be carried out in one of the following circumstances.
a) before approval evaluation of new products;
b) when there are great changes in the design, technology, materials, formulations
of catalysts;
c) when resume production after long-term shutdown;
d) when the National Quality Supervision Age...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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