Urea direct injection pyrolysis spray gun characteristic test experimental device and method

Abstract

The invention discloses a urea direct injection pyrolysis spray gun characteristic test experimental device and method. The middle of a double-fluid urea direct injection pyrolysis spray gun is mounted in a tubular heater; an outlet of the air blower is communicated with an inlet of the hot air gun through the first manual valve, and an outlet of the hot air gun is communicated with a hot air inlet of the tubular heater; an outlet of the water tank is communicated with a liquid pipeline inlet of the double-fluid urea direct injection pyrolysis spray gun through a gear pump; an outlet of the air compressor is divided into two paths after passing through a filter pressure reducer, one path is communicated with an atomized air interface of the double-fluid urea direct injection pyrolysis spray gun through a second manual valve, and the other path is communicated with a cooling air interface of the double-fluid urea direct injection pyrolysis spray gun through a third manual valve; the device and the method can simulate the test of the characteristics of the urea direct-current pyrolysis spray gun.

Description

technical field [0001] The invention relates to a test device and method, in particular to a test device and method for testing the characteristics of a urea direct-injection pyrolysis spray gun. Background technique [0002] Gas-steam combined cycle power generation technology has been widely used in my country for its clean and efficient features. In recent years, with the improvement of national environmental protection standards, many regions have put forward more stringent requirements on the NOx emissions of gas turbines. For example, the Shenzhen Municipal People's Government issued the Shenfu [2017] No. -2020)" requires that the NOx emission concentration of new gas-fired generating units be controlled at 15mg / m 3 Below, before 2020, the NOx emission concentration of E-class gas-fired generator sets will be controlled at 25mg / m 3 Below, the NOx emission concentration of Class F gas-fired generator sets is controlled at 15mg / m 3 the following. Jiangsu, Beijing and...

AI Technical Summary

Problems solved by technology

In order to mix the urea pyrolysis product and the NOx in the flue gas evenly, it is usually necessary to extend the urea direct injection pyrolysis spray gun into the flue. The longest distance reached 2 to 3 meters; on the other hand, due to the low initial NOx value of the gas turbine, the urea solution flow rate of a single spray gun is small, resulting in the flow rate of the urea solution inside the spray gun is usually lower than 0.1m / s, so the spray gun In the high-temperature flue gas environment, there is a risk that the urea solution will be evaporated to dryness by high temperature during the internal flow process, thereby blocking the spray gun

[0004] In this case, the structure and characteristic parameters of the spray gun are particularly important for the successful application of urea direct injection pyrolysis technology, but the cost of performing the characteristic test of the spray gun on the actual unit is relatively high. Experimental research on the structure and characteristic parameters of the spray gun in the exhaust gas condition of the cycle unit

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