Minnesota Administrative Rules
Agency 167 - Pollution Control Agency
Chapter 7011 - STANDARDS FOR STATIONARY SOURCES
CONTROL EQUIPMENT
Part 7011.0070 - LISTED CONTROL EQUIPMENT AND CONTROL EQUIPMENT EFFICIENCIES
Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1. Listed control equipment efficiencies.
Subp. 1a. Exceptions where control efficiency disallowed.
The owner or operator may not use a control efficiency listed in Table A if:
CONTROL EQUIPMENT EFFICIENCY - TABLE A
| ID# | CONTROL EQUIPMENT DESCRIPTION | POLLUTANT | CONTROL EFFICIENCY | ||
| TOTAL ENCLOSURE | HOOD: CERTIFIED | HOOD: NOT CERTIFIED | |||
| Table A - Section 1 - Equipment Designed Primarily for Particulate Matter Control | |||||
| PM CONTROL CATEGORY-CYCLONES means a device where airflow is forced to spin in a vortex through a tube | |||||
| 007 | Centrifugal Collector | PM | 90% | 72% | 54% |
| (cyclone)-high efficiency means: a cyclonic device with parameters stated in drawing 1 and table 1 | PM-10 | 78% | 62% | 46% | |
| 008 | Centrifugal Collector | PM | 80% | 64% | 48% |
| (cyclone)-medium efficiency means: a cyclonic device with parameters stated in drawing 1 and table 1 | PM-10 | 60% | 48% | 36% | |
| 009 | Centrifugal Collector | PM | 25% | 20% | 15% |
| (cyclone)-low efficiency means: a cyclonic device with parameters stated in drawing 1 and table 1 | PM-10 | 25% | 20% | 15% | |
| 076 | Multiple Cyclone without | PM | 90% | 72% | 54% |
| Fly Ash Reinjection means: a cyclonic device with more than one tube where fly ash is not reinjected | PM-10 | 72% | 58% | 43% | |
| 057, | Wet Cyclone Separator or | PM, | 84% | 68% | 51% |
| 085 | Cyclonic Scrubbers means: a cyclonic device that sprays water into a cyclone | PM-10 | |||
| 010, | PM CONTROL CATEGORY- | ||||
| 011, | ELECTROSTATIC | ||||
| 012, | PRECIPITATORS means: | ||||
| a control device in which the | |||||
| 146 | incoming particulate matter receives an electrical charge and is then collected on a surface with the opposite electrical charge | ||||
| -assumed efficiency for boiler fly ash control | PM-10 | 40% | NA | NA | |
| -assumed efficiency for other | PM | 98% | 78% | 59% | |
| applications PM CONTROL CATEGORY - OTHER CONTROLS | PM-10 | 94% | 75% | 56% | |
| 016, | Fabric Filter means: a control | PM | 99% | 79% | 59% |
| 017, | device in which the incoming | PM-10 | 93% | 74% | 56% |
| 018 | gas stream passes through a porous fabric filter forming a dust cake | ||||
| 052 | Spray Tower means: a control | PM | 85% | 68% | 51% |
| device in which the incoming gas stream passes through a chamber in which it contacts a liquid spray | PM-10 | 84% | 68% | 51% | |
| 053 | Venturi Scrubber means: a | PM | 94% | 76% | 57% |
| control device in which the incoming gas stream passes through a venturi into which a low pressure liquid is introduced | PM-10 | 84% | 68% | 51% | |
| 055 | Impingement Plate Scrubber | PM | 77% | 62% | 46% |
| means: a control device in which the incoming gas stream passes a liquid spray and is then directed at high velocity into a plate | PM-10 | 77% | 62% | 46% | |
| 056, | Mechanically Aided Separator | PM | 64% | 52% | 39% |
| 113 | means: a device that relies on inertia for separating particles from a gas stream | PM-10 | 5% | 4% | 3% |
| 058, | Wall or Panel Filter means: | PM | 85% | 68% | 51% |
| 086 | a control device in which the exiting gas stream passes through a panel of coarse fibers. Other Wall Filters | PM-10 | 85% | 68% | 51% |
| means removable panels for cleaning and replacement, or liquid curtains for particulate removal that provide little resistance to air flow | |||||
| 101 | HEPA Filter or ULPA Filter means: a high efficiency wall or panel filter designed for collection of submicron particles | PM | 99.98% | 80% | 60% |
| PM-10 | 99.98% | 80% | 60% | ||
| 503 | Charged Scrubber means: a control device in which electric power is used to precharge particulate matter in the gas stream as a means of increasing the scrubber's collection efficiency for fine particles | PM | 94% | 76% | 57% |
| PM-10 | 84% | 68% | 51% | ||
| 517 | Condensation Scrubber means: a control device in which steam is injected into a wet scrubber to create supersaturated conditions and promote condensation of water on fine particulate matter in the gas stream | PM | 94% | 76% | 57% |
| PM-10 | 84% | 68% | 51% | ||
| Table A - Section 2 - Equipment Designed for VOC Control (includes efficiencies for pollutants where there is a co-benefit of control) | |||||
| VOC CONTROL CATEGORY | |||||
| 019, | Catalytic Afterburners | ||||
| 020, | (catalytic oxidation) means: | VOC | 94% | 76% | 57% |
| 109 | a device used to reduce VOCs | PM | 62% | 50% | 37% |
| to the products of combustion | PM-10 | 62% | 50% | 38% | |
| through catalytic (use of a catalyst) oxidation in a combustion chamber | CO | 94% | 76% | 57% | |
| 021, | Thermal Afterburners (thermal | VOC | 97% | 78% | 58% |
| 022, | oxidation) means: a device | PM | 62% | 50% | 37% |
| 131, | used to reduce VOCs to the | PM-10 | 62% | 50% | 37% |
| 133 | products of combustion | CO | 97% | 78% | 58% |
| through thermal (high temperature) oxidation in a combustion chamber | |||||
| 023 | Flaring or Direct Combustor | VOC | 98% | 79% | 59% |
| means: a device in which air, | PM | 61% | 50% | 37% | |
| combustible organic waste | PM-10 | 61% | 50% | 37% | |
| gases, and supplementary fuel | CO | 98% | 79% | 59% | |
(if needed) react in the flame zone (e.g., at the flare tip) to destroy the VOCs
Table 1
| Cyclone Type | |||
| Ratio Dimensions | High Efficiency | Medium Efficiency | Low Efficiency |
| Height of inlet, H/D | <="0.44 | >0.44 and <0.8 | >="0.8 |
| Width of inlet, W/D | <="0.2 | >0.2 and <0.375 | >="0.375 |
| Diameter of gas exit, De/D | <="0.4 | >0.4 and <0.75 | >="0.75 |
| Length of vortex finder, S/D | <="0.5 | >0.5 and <0.875 | >="0.875 |
If one or more of the "ratio dimensions," as listed in table 1, are in a different efficiency category (high, medium, low), then the lowest efficiency category shall be applied.
Subp. 1b. Transition period.
Any owner or operator of a stationary source that used the control efficiencies in part 7011.0070 to qualify for its permit and is ineligible for its permit on or after January 1, 2007, shall apply for another type of permit on or before December 31, 2008.
Subp. 2. Alternative control equipment and capture efficiencies; control efficiencies for hazardous air pollutants. The owner or operator of a stationary source may use an alternative control equipment efficiency or capture efficiency or both for the control equipment listed in subpart 1, if the actual control efficiency or capture efficiency has been verified by a performance test approved by the commissioner under parts 7017.2001 to 7017.2060. The owner or operator of a stationary source may use a control equipment efficiency for listed control equipment for a hazardous air pollutant, if the control efficiency has been verified by a performance test approved by the commissioner under parts 7017.2001to7017.2060. The request for the alternative control efficiency or capture efficiency or both may be made through a permit application for a part 70, state, registration, capped, or general permit, or in a required notice or application submitted under parts 7007.1150 to 7007.1500, by including the verification or approval letter and the required operating parameters in the application or notice. The owner or operator of a stationary source must attain at all times the alternative control efficiency or capture efficiency or both for a piece of listed control equipment at the stationary source established under this subpart.
Statutory Authority: MS s 116.07
