API Publ 4704-2001 pdf free download

API Publ 4704-2001 pdf free download.Gas Fired Heater-Test Report Site B Characterization of Fine Particulate Emission Factors and Speciation Profiles from Stationary Petroleum Industry Combustion Sources.
The tests were performed on a gas-fired process heater at Refinery Site B. The heater has a maximum firing rate of 114 MMBtu/hr with a typical rate of approximately 70 MMBtuh. The unit is made up of 4 box-type heaters, with 30 burners on each side in an opposed fired configuration (60 per box), vented to a common stack. Each furnace is radiant-wall fired, and all four share one common convection coil. The heater is fired on refinery fuel gas and is a low temperature duty design with a typical furnace temperature of approximately 1500°F. The unit is not equipped with air pollution controls for NO,, SO, or particulate. The heater appeared to be in good working condition during the test. Operating conditions during the test are given in Section 4. Process parameters monitored during testing include: fuel gas flow rate, specific gravity, heating value and H,S content; process fluid flow rate; process fluid outlet temperature; excess oxygen; and burners in service (in or out). SAMPLING LOCATIONS Figure 2- 1 provides an overview of the boiler process and the sampling and monitoring locations. Flue gas samples were collected from the stack. The single stack is equipped with a 360-degree sampling platform located 100 feet above the ground, which is accessible via a ladder. There are four threaded 4-inch diameter sampling ports with 4-inch pipe nipples welded to the stack, located orthogonally around the circumference approximately 52 inches above the platform. The stack diameter at this elevation is 74.3 inches. The sample ports are located 630 inches (8.5 diameters) downstream and 304 inches (4.1 diameters) upstream of the nearest flow disturbances. Following velocity and 0, traverses to check for stratification, all sampling was performed at a single point in the center of the stack to facilitate Co-location of the dilution tunnel and EPA Method 201N202 probes.
An overview of the sampling and analysis procedures is given in Table 3- 1. Figure 3- 1 shows the testing chronology for the dilution tunnel and in-stack methods. The time of day for the start and finish of each measurement run is shown on the figure. For example, Method 201N202 Run 1 began at 1 3 5 1 hours and finished at 195 1 hours on Tuesday, October 13. Dilution tunnel testing and in-stack testing were performed concurrently. All samples were collected at approximately the same point in the center of the stack; the dilution tunnel and in-stack test method probes were Co-located. STACK GAS FLOW RATE, MOISTURE CONTENT AND MOLECULAR WEIGHT An S-type Pitot tube (EPA Method 2) was used to determine the average stack gas velocity and volumetric flow rate. Stack gas molecular weight was calculated in accordance with EPA Method 3. Moisture content of the sample was determined based on weight gain of the impingers used in the Method 201N202 train according to EPA Method 4. A full velocity traverse of the stack was performed before and after each test to determine total stack gas flow rate. 02, COZ, CO, NO, AND SO2 Major gases and pollutant concentrations in the stack sample were measured using a continuous emission monitoring system (CEMS), illustrated schematically in Figure 3-2. Table 3-2 lists the CEMS specifications. The sample was collected from a single traverse point in the stack after verifying that the gas concentration profile deviated by less than 1 O percent of the mean concentration. Sample gas was passed through a primary in-stack sintered metal filter, a heated stainless steel probe, a heated Teflon@ transfer line, a primary moisture removal system (heat exchanger impingers in an ice bath), a heated secondary filter, a diaphragm pump, and a heated back-pressure regulator to a thermoelectric water condenser.