JB/T 8532-2008 English PDF (JB/T8532-2008)

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JB/T 8532-2008: Pulse-jet bag filter
JB/T 8532-2008
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 13.030.40
J 88
Filing No.: 23312-2008
Replacing JB/T 8532-1997
Pulse-jet Bag Filter
ISSUED ON: MARCH 12, 2008
IMPLEMENTED ON: SEPTEMBER 1, 2008
Issued by: National Development and Reform Commission of the People's
Republic of China
Table of Contents
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 6
4 Technical Requirements ... 7
4.1 Basic Requirements ... 7
4.2 Operating Conditions and Main Properties ... 7
4.3 Material ... 8
4.4 Machining Requirements ... 8
4.5 Requirements on Key Spare Parts and Components ... 10
4.6 Installation Requirement ... 10
4.7 Painting ... 11
5 Test Method ... 11
6 Inspection Rules ... 12
6.1 Inspection Classification ... 12
6.2 End-of-manufacturing inspection ... 12
6.3 Type Inspection ... 12
7 Marking, Packaging, Transportation and Storage ... 12
7.1 Marking ... 12
7.2 Packaging and Transportation ... 13
7.3 Storage ... 14
Pulse-jet Bag Filter
1 Scope
This Standard specifies technical requirements, test methods, inspection rules, marking,
packaging, transportation and storage of pulse-jet bag filters.
This Standard is applicable to pulse-jet bag filters (hereinafter referred to as bag filter).
2 Normative References
The following standards contain provisions which, through reference in this text, constitute
provisions of this standard. For dated reference, subsequent amendments to, or revisions
(excluding amended content) of, any of these publications do not apply. However, the parties
whose enter into agreement according to these specifications are encouraged to research
whether the latest editions of these documents are applied or not. For undated references, the
latest edition of the normative document referred to applies.
GB/T 699 Quality Carbon Structural Steels
GB/T 700 Carbon Structural Steel (GB/T 700-2006, ISO 630:1995, NEQ)
GB/T702 Hot-rolled Round and Square Steel Bars - Dimension, Shape,
Weight and Tolerance (GB/T 702-2004, ISO 1035.1~1035-2:1980,
MOD)
GB/T 704 Hot-rolled Flats - Dimensions, Shape, Weight and Tolerances
(GB/T 704-1988, neq ISO 1035-4:1982)
GB/T 706 Hot-rolled beam steel - Dimensions, Shape, Weight and Tolerances
(GB/T 706-1988, neq FOTC 8239:1972)
GB/T 707 Hot-rolled Channel Steel - Dimensions, Shape, Weight and
Tolerances (GB/T 707-1988, neq FOTC 8240:1972)
GB/T 912 Hot-rolled Plates and Strips of Carbon Structural Steels and High
Strength Low Alloy Structural Steels
GB/T 985-1988 Basic Forms and Sizes of Weld Grooves for Gas Welding Manual
Arc Welding and Gas-shielded Arc Welding
GB/T 986-1988 Basic Forms and Sizes of Weld Grooves for Submerged Arc Weld
GB/T 1804-2000 General Tolerances - Tolerances for Linear and Angular
Dimensions without Individual Tolerance Indications (eqv ISO
2768-1:1989)
JB/T 5916-2004 Electro-magnetic Pulse Jet Valve for Bag-house Filters
JB/T 5917-2006 Bag Cage for Baghouse Filters
JB/T 8471-1996 Technical Requirement and Acceptance Regulation for Bag Filter
Erection
JB/T 10191-2000 Bag Filter - Safety Rules - Manifold for Pulse-jet Bag Filter
3 Terms and Definitions
For the purposes of this Standard, the following terms and definitions apply.
3.1
Pulse-jet bag filter
Bag filter that removes dust by shock vibration and counterblast -- using the compressed gas
ejected instantly by the pulse jetting mechanism with compressed gas as dust removal power
so as to induce multiples of secondary gas to inject into the filtering bag and make the
filtering bag expended sharply.
3.2
Contrary flow pulse-jet bag filters
Pulse-jet bag filter in which jetting air flow is reverse to the clean air flow in the filtering bag
(house) and clean air is discharged from the upper clean air box.
3.3
Consistent flow pulse-jet bag filters
Pulse-jet bag filter in which jetting air flow is consistent to the clean air flow in the filtering
bag after filtering and clean air is discharged from the lower clean air box.
3.4
Two directions pulse-jet bag filters
Pulse-jet bag filter in which jetting air flows are injected from upper and lower positions of
the filtering bag and the clean air is discharged from the clean air manifold.
3.5
Round gap ejector pulse-jet bag filters
Pulse-jet bag filter in which round gap jet exhauster is used for contrary jetting.
4.7 Painting
4.7.1 Surface rust, residue, oil stain, dust and other dirt shall be cleaned up before bag filter
painting. Derusting method and grade shall meet the requirements of GB/T 8923; where
ejecting or blast cleaning is used, the derusting grade shall not be lower than Sa2; where hand
scrubber or power tool is used for derusting, the derusting grade shall not be lower than St2.
4.7.2 For whole-set bag filter to be delivered, their external surfaces shall be painted with
two passes of primer and two passes of finish coats; for large scale bag filter transported to
site in a split way, last pass of finish coat is painted on site.
4.7.3 Paint film of bag filter shall be uniform and solid-colored, and free of defects like
crisping, flaking, cracking, curling and brush mark; the paint film thickness shall not be less
than 50μm.
5 Test Method
5.1 Tests for outlet dust concentration and equipment resistance of bag filter shall meet the
requirements of GB/T 12138-1989; bag filters may be tested in the operating conditions half a
year after completing the field installation.
5.2 Air leakage rate of bag filter is the ratio of the difference between outlet air volume and
inlet air volume to the inlet air volume of bag filter. Air leakage rate is tested in the condition
where the bag filter runs normal filtering; stable negative pressure shall be kept in the system
during the test. The test condition is that negative pressure in bag filter clean air box is
2000Pa. When there is deviation of negative pressure, it is calculated according to the
following formula:
Where,
ε -- The air leakage rate, %;
ε1 -- The measured air leakage rate, %;
p -- The averaged negative pressure in the clean air box, Pa.
5.3 Bag filter film thickness shall be tested with paint film thickness gauge, and the number
of test points shall not be less than two per square meter.
5.4 Inspection of paint film adhesive force shall comply with the requirements of JB/T
5000.12.
6 Inspection Rules
6.1 Inspection Classification
Inspections of bag filter include type inspection and end-of-manufacturing inspection.
6.2 End-of-manufacturing inspection
6.2.1 Each product may be delivered upon it passes the inspection performed by the
manufactory quality inspection department and is accompanied by the quality certificate.
6.2.2 End-of-manufacturing inspection shall comply with the requirements of Chapter 4,
and it shall cover the items blow:
a) No load test of driving mechanism;
b) Test for pulse jet device;
c) Accuracy test for machining and assembling;
d) Welding quality inspection;
e) Appearance quality inspection;
f) Inspections on other technical requirements specified in order arrangement.
6.3 Type Inspection
6.3.1 Under any of the following conditions, type inspection shall be carried out:
a) Where it is produced in the first batch;
b) Where great change of structure, material or process may affect performance of the bag
filters after normal production;
c) Periodic random inspection shall ...