Figure 5.1 presents the structural diagram of experiment apparatus for the synergy inhibition of syngas explosion using the ultrafine water mist and metal wire mesh. The main structure was introduced in detail in the previous work (Cao et al. in Int J Hydrogen Energy 70:1089–1100; 2024). This experimental apparatus was mainly equipped with a metal mesh flame resistance system and a spray system. The flame resistance system consisted of two wire mesh press plates, the multi-layer metal wire mesh (the stainless steel) and four support rods. The metal wire mesh was made of 304 stainless steel material and its thermal conductivity was 16.3 W m−1 K−1 at 100 °C. The melting point could reach 1457 °C. The wire mesh with determined layer and mesh numbers was placed inside the press plate, and four support rods were adopted to support it. The wire mesh was compressed tightly and the height of press plate was adjusted through bolts (Effective area: H × D = 100 mm × 100 mm). To ensure the same compression strength, a metal compression ring with a certain height was installed on the internal support rod of press plate and tightened with bolts. The structure size of press plates was designed and processed based on the cross-sectional area of explosion vessel to achieve close integration. Meanwhile, the gap of wall surface and the press plate was blocked by the vacuum sealing mud. The spray system included a water storage tank, a solenoid valve, one-way valve and a fine nozzle, as shown in Fig. 5.1. The fine nozzle was installed at the bottom end of vessel top flange. The water storage tank was filled with the deionized water and its internal pressure was determined by a precision pressure gauge. By controlling the opening and closing of the solenoid valve through the program, the different spray time was achieved.