Please select the most similar patent number from A, B, C and D. Which number is?
A preparation device (100) and preparation method for a supersaturated hydrogen solution. The preparation device (100) comprises a housing (4) and a hollow fiber membrane group (18). A liquid inlet (42) communicated with a liquid source, a liquid outlet (43), and a gas inlet (44) used for communicating with a hydrogen source are provided on the housing (4); the hollow fiber membrane group (18) comprises a plurality of hollow fiber membrane tubes (19) contained in the housing (4); an inlet end (20) of the hollow fiber membrane group (18) is communicated with the liquid inlet (42), so that liquid can flow in the hollow fiber membrane tubes (19), and hydrogen from the hydrogen source can flow from membrane holes (191) of the hollow fiber membrane tubes (19) into the hollow fiber membrane tubes (19) and can be mixed with the liquid; and an outlet end (23) of the hollow fiber membrane group (18) is communicated with the liquid outlet (43). Hydrogen serving as bubbles in a nano-scale diameter is fully mixed with liquid, the hydrogen concentration and the preparation time of an obtained solution are both superior to the prior art, the preparation efficiency is high, the cost is low, and the application range is wide.
A: A breathable membrane component (7), a membrane biofilm reactor, and a membrane biofilm reactor assembly equipped with same. The membrane biofilm reactor has multiple membrane components (7) fixed on a membrane frame (10) and placed in a membrane housing (2). As core components, the breathable membrane components (7) have multiple woven membrane fabrics (13) spirally wrapped on a central core pipe (15) to constitute a radial woven layer over the pipe, where the membrane fabrics (13) are formed by weaving a large amount of hollow fiber membrane filaments (19) and barrier filaments (20). Sewage is introduced into the central core pipe (15), a gas is introduced into the cavities of a hollow fiber membrane for the growth of microorganisms on the outer surface of the hollow fiber membrane, and the sewage outflows from a perforated area of the central core pipe to come into contact with the microorganisms on the outer surface of the hollow fiber membrane, thus forming a radial flow.
B: Provided are a reinforced polyacrylonitrile hollow fiber membrane and preparation method therefor. The preparation method comprises the following steps: (1) weaving a polyacrylonitrile fiber hollow woven pipe by using a two-dimensional weaving technique, and using the hollow woven pipe as a reinforcement body for the hollow fiber membrane; (2) preparing a polyacrylonitrile membrane-casting solution, the mass fraction compositions thereof being: polyacrylonitrile resin 3-25%; solvent 50-95%; and additives 2-30%, the sum of each component being 100%; (3) soaking the hollow woven pipe with a poor polar organic liquid for 1-60 s, the poor polar organic liquid is ethanol, glycerol, isopropanol or PEG-600; and (4) coextruding the hollow woven pipe and membrane-casting solution through an annular spinneret and solidifying sufficiently in a coagulating bath to obtain the reinforced polyacrylonitrile hollow fiber membrane.
C: A preparation device (100; 200) and a preparation method for a supersaturated gas solution. The preparation device (100; 200) comprises a gas-liquid mixing device (1024; 202) and a water tank (104; 204), wherein the gas-liquid mixing device (1024; 202) is provided with a water inlet (102a; 202a), a water outlet (103b; 202c) and a gas inlet (105b; 202b) which is used for being in communication with a gas source (101; 201), and the water tank is provided with a water suction port (1011; 2011) and a water inlet (1012; 2012), wherein the water inlet (102a; 202a) of the gas-liquid mixing device (1024; 202) is connected with the water suction port (1011; 2011) of the water tank (104; 204) via a water suction flow branch line (1022; 2020), the water outlet (103b; 202c) of the gas-liquid mixing device (1024; 202) is connected with the water inlet (1012; 2012) of the water tank (104; 204) via a discharge flow branch line (1023; 2021), and a pressure relief device (106; 206) is arranged on the discharge flow branch line (1023; 2021), such that a gas-liquid mixing flow from the gas-liquid mixing device (1024; 202) flows through the pressure relief device (106; 206) and then is discharged into the water tank (104; 204).
D: A hollow fibrous membrane element comprises a pressure-bearing housing (7), and hollow fibrous membranes (6), and a water distributing pipe (5). A head sealing cover (3) is disposed at one end of the pressure-bearing housing (7). The head sealing cover (3) is used for fixing the water distributing pipe (5) and sealing the pressure-bearing housing (7). A housing liquid port (8) is disposed in the pressure-bearing housing (7). A cover head liquid port (2) is disposed in the head sealing cover (3). One end of each hollow fibrous membrane (6) is fixed with the pressure-bearing housing (7). The interior of the hollow fibrous membrane (6) communicates with the cover head liquid port (2). The other end of each hollow fibrous membrane (6) is sealed. Each hollow fibrous membrane (6) is radially distributed in the pressure-bearing housing (7).
Answer: C