The volume of the sample could be adjusted according to the concentration of the solution and the consumption in the titration.

One end of the absorption bottle was connected with the sampling tube, while the other end was connected with the wet ?owmeter and the vacuum pump to continuously extract 2 L of gas.

The 500 ml alkaline absorption solution was respectively absorbed into two gas absorption bottles in series. In order to fully absorb the gas and ensure the accuracy of gas production, the two-stage absorption method was adopted to absorb the coke-oven raw gas. A sampling tube was set at the bridge tube, and a certain volume of raw gas was extracted into the absorption liquid then the contents of thiocyanate, hydrogen cyanide, and H 2 S were measured, and the temperature was recorded at regular intervals. The spray point and temperature measurement point are shown in Fig. The spray tube was inserted from the top into the riser with its equal length thermocouple. The desul- furization wastewater was stored in the raw material storage tank ?rst, then ?ltered and sent into the spray pipe at different positions through the pipeline.

114 of 4.3 m in height at the Yixing coking plant was used as a pyrolysis reactor, and the test device, including a sample tank, pressurized pump, and ?lter was added. In the experiment, the single riser of coke oven no.

Sampletank 3.0