[Comment: For dates of non-regulatory government publications,
publications of recognized organizations and associations, federal rules, and
federal statutory provisions referenced in this rule, see the last paragraph of
rule
3745-76-01 of the
Administrative Code titled"Incorporation by reference."]
(A) General requirements
(1) Flares shall be designed for and operated
with no visible emissions as determined by the methods specified in paragraph
(D)(1) of this rule, except for periods not to exceed a total of five minutes
during any two consecutive hours.
(2) Flares shall be operated with a flame
present at all times, as determined by the methods specified in paragraph
(D)(2) of this rule.
(3) Flares
used to comply with provisions of this chapter shall be operated at all times
when emissions may be vented to them.
(4) Flares used to comply with this rule
shall be steam-assisted, air-assisted, or nonassisted.
(B) The owner or operator shall either comply
with the requirements for the heat content specifications and the maximum tip
velocity in paragraphs (B)(1) of this rule or the requirements for nonassisted
flares having a hydrogen content of 8.0 per cent or greater in paragraph (B)(2)
of this rule:
(1) Heat content and maximum
tip velocity specifications
(a) Flares shall
be used only with the net heating value of the gas being combusted being 11.2
megajoules per standard cubic meter (three hundred Btu per standard cubic foot)
or greater if the flare is steam-assisted or air-assisted; or with the net
heating value of the gas being combusted being 7.45 megajoules per standard
cubic meter (two hundred Btu per standard cubic foot) or greater if the flare
is nonassisted. The net heating value of the gas being combusted shall be
determined by the methods specified in paragraph (D)(3) of this rule.
(b) Steam-assisted and nonassisted
flares shall be designed for and operated with an exit velocity less than 18.3
meters per second (sixty feet per second), as determined by the methods
specified in paragraph (D)(4) of this rule, except as provided in paragraphs
(B)(1)(c) and (B)(1)(d) of this rule.
(c) If the net heating value of the gas being
combusted is greater than 37.3 megajoules per standard cubic foot (one thousand
Btu per standard cubic foot), steam-assisted and nonassisted flares can be
designed for and operated with an exit velocity equal to or greater than 18.3
meters per second (sixty feet per second) but less than one hundred and
twenty-two meters per second (four hundred feet per second), as determined by
the methods specified in paragraph (D)(4) of this rule.
(d) Steam-assisted and nonassisted flares may
be designed for and operated with an exit velocity less than that calculated
for the velocity (V max,2) below and less than one hundred and twenty two
meters per second (four hundred feet per second). This maximum permitted
velocity shall be calculated as follows:
Log10 (Vmax) = (HT + 28.8 )/ 31.7
where:
Vmax = maximum permitted velocity, meters per second;
28.8 = constant;
31.7 = constant; and
HT = the net heating value as determined in paragraph (D)(3) of
this rule.
The actual exit velocity of the flare shall be determined by
the methods specified in paragraph (D)(4) of this rule.
(e) Air-assisted flares shall be designed and
operated with an exit velocity less than the velocity, Vmax MAX, calculated as
follows:
Vmax = 8.706 + 0.7084(HT)
where:
Vmax = maximum permitted velocity, meters per second;
8.706 = constant;
0.7084 = constant; and
HT = the net heating value as determined in paragraph (D)(3) of
this rule.
The actual exit velocity of the flare shall be determined by
the methods specified in paragraph (D)(4) of this rule.
(2) Nonassisted flares with a
hydrogen content of at least eight per cent (by volume)
(a) Nonassisted flares shall be used that
have a diameter of three inches or greater, and a hydrogen content of 8.0 per
cent (by volume), or greater, and shall be designed for and operated with an
exit velocity of less than 37.2 meters per second (one hundred and twenty two
feet per second) and less than the velocity, Vmax , as determined by the
following equation:
Vmax = (XH2 -K1) K2
Where:
Vmax = maximum permitted velocity, meters per second;
K1 = constant, 6.0 volume-per cent hydrogen;
K2 = constant, 3.9 meters per second per volume-per cent
hydrogen; and
XH2 = the volume-per cent of hydrogen, on a wet basis, as
calculated by using the ASTM D1946-90.
The actual exit velocity of the flare shall be determined by
the methods specified in paragraph (D)(4) of this rule.
(C) Owners or operators
of flares used to comply with the provisions of this chapter shall monitor
these control devices to ensure that they are operated and maintained in
conformance with their design. Monitoring and record keeping shall be
maintained as required in paragraph (C)(4) of rule
3745-76-13
and paragraph (C) of rule
3745-76-11
of the Administrative Code.
(D)
Compliance determination
(1) Reference Method
22 shall be used to determine the compliance of flares with the visible
emission provisions of this rule. An observation period of two hours shall be
used in accordance with the requirements of Method 22.
(2) The presence of a flare pilot flame shall
be monitored using a thermocouple or other equivalent device to detect the
presence of a flame.
(3) The net
heating value of the gas being combusted in a flare shall be calculated using
the following equation:
For Equation - To obtain the appendix, table, image, etc.
please call LSC's ERF Helpdesk at 614-387-2078 or send an email to
erfhelpdesk@lsc.state.oh.us.
Where:
k = constant, 1.740 x 10- 7 (megajoule-gram mole per parts per
million-standard cubic meter-kilocalorie), where the standard temperature for
(gram mole/ per standard cubic meter) is twenty degrees Celsius;
HT = net heating value of the sample, megajoules per standard
cubic meter; where the net enthalpy per mole of offgas is based on combustion
at twenty five degrees Celsius and seven hundred sixty millimeters of mercury,
but the standard temperature for determining the volume corresponding to one
mole is twenty degrees Celsius;
Ci = concentration of sample component i in ppm on a wet basis,
as measured for organics by Method 18 of Appendix A of 40 CFR Part 60an d
measured for hydrogen and carbon monoxide by ASTM D1946-90;
Hi = net heat of combustion of sample component i, kilocalorie
per gram mole at twenty five degrees Celsius and seven hundred sixty
millimeters of mercury. The heats of combustion may be determined using ASTM
D4809-95 if published values are not available or cannot be calculated.
(4) The actual exit velocity of a
flare shall be determined by dividing the volumetric flowrate (in units of
standard temperature and pressure), as determined by Reference Methods 2, 2A,
2C, or 2D as appropriate; by the unobstructed (free) cross sectional area of
the flare tip.
Notes
Ohio Admin. Code
3745-76-15
Five Year Review (FYR) Dates:
03/24/2016 and
03/24/2021
Promulgated
Under: 119.03
Statutory
Authority: 3704.03(E)
Rule Amplifies:
3704.03(A),
3704.03(E)
Prior Effective Dates: 1/31/98,
10/10/06
R.C. 119.032 review dates:
06/16/2011 and
06/16/2016
Promulgated
Under: 119.03
Statutory Authority: 3704.03(E)
Rule
Amplifies: 3704.03(A), 3704.03(E)
Prior Effective Dates: 1/31/98,
10/10/06