Title: Experimental study on gas-solid flow performance of a Jet J-valve

Authors: Xiaocheng Liu; Yuwei Zhang; Xiang Xu; Xiquan Li; Xiaoyong Xue

Addresses: CAS Key Laboratory of Advanced Energy and Power, Institute of Engineering Thermophysics, 11th on North Fourth Ring West Road, Haidian District, Beijing, 100190, China ' University of Chinese Academy of Sciences, 11th on North Fourth Ring West Road, Haidian District, Beijing, 100190, China ' University of Chinese Academy of Sciences, 11th on North Fourth Ring West Road, Haidian District, Beijing, 100190, China ' Research Center for Clean Energy and Power, Chinese Academy of Sciences, 56th on Huanghai Road, Lianyun District, Liangyugang, 222069, China ' Research Center for Clean Energy and Power, Chinese Academy of Sciences, 56th on Huanghai Road, Lianyun District, Liangyugang, 222069, China

Abstract: To solve the problem of a high pressure drop in an ordinary J-valve, this paper describes the design of a new type of J-valve, namely, the Jet J-valve. We contrast the ordinary J-valve with the Jet J-valve and analyse the material transport capacity and stability of pressure drops. The experimental results show that the pressure drop fluctuations of the riser, standpipe and J-valve are slightly greater in the states of dilute-phase and dense-phase transport for the Jet J-valve than for the ordinary J-valve. However, under the same operating conditions, the solids circulation rate is 41-84 kg·m^–2·s^–1 higher when the Jet J-valve is used. In addition, the pressure drop of the Jet J-valve is approximately 18% lower than that of the ordinary J-valve. When the steady state transitions to a slugging state, the solids circulation rate decreases by 76.5% and the pressure drop of the J-valve decreases by 23.3%, which is relatively small compared with that of the riser and the standpipe. [Received: December 30, 2017; Accepted: July 5, 2018]

Keywords: Jet J-valve; gas-solid flow; fluidisation number; pressure fluctuation; dense-phase transport; coefficient of variation.

DOI: 10.1504/IJOGCT.2020.107026

International Journal of Oil, Gas and Coal Technology, 2020 Vol.24 No.2, pp.241 - 265

Received: 30 Dec 2017
Accepted: 05 Jul 2018
Published online: 01 May 2020 *

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