Two-phase sulfate reduction device and treatment method for preventing sludge calcification

A two-phase sulfate reduction device for preventing sludge calcification, comprising a device body (100), an internal circulation unit (200), and an alloy catalyst two-phase connection unit (300);

• characterized by:
• the device body (100) is internally configured from bottom to top with an acid-producing zone (110), a methane-producing zone (120), and a precipitation zone (130);
• the acid-producing zone (110), the methane-producing zone (120), and the precipitation zone (130) have a volume ratio of 2:4:1;
• an acid-producing zone three-phase separator (111) is arranged at a top of the acid-producing zone (110);
• a methane-producing zone three-phase separator (121) is arranged between the methane-producing zone (120) and the precipitation zone (130);
• the internal circulation unit (200) comprises a cyclone gas-liquid separator (210), an exhaust pipe (220), an acid-producing zone riser pipe (230), a methane-producing zone riser pipe (240), and a reflux pipe (250);
• the cyclone gas-liquid separator (210) is arranged at a top of the device body (100);
• the exhaust pipe (220) is located at a top of the cyclone gas-liquid separator (210);
• the cyclone gas-liquid separator (210) is connected to the acid-producing zone three-phase separator (111) through the acid-producing zone riser pipe (230);
• the cyclone gas-liquid separator (210) is connected to the methane-producing zone three-phase separator (121) through the methane-producing zone riser pipe (240);
• the cyclone gas-liquid separator (210) is connected to the methane-producing zone (120) through the reflux pipe (250);
• the alloy catalyst two-phase connection unit (300) comprises a first alloy catalyst zone (310), a second alloy catalyst zone (320), and a U-shaped pipe (330);
• the first alloy catalyst zone (310) is arranged within an influent pipe (101) connected below the device body (100);
• the second alloy catalyst zone (320) is arranged within the U-shaped pipe (330);
• the U-shaped pipe (330) is arranged on a side wall of a reactor main body between the acid-producing zone (110) and the methane-producing zone (120);
• one open end of the U-shaped pipe (330) is connected to the acid-producing zone (110), and the other open end is connected to the methane-producing zone (120);
• the acid-producing zone (110) is connected to the methane-producing zone (120) through the U-shaped pipe (330);
• the effluent of the acid-producing zone (110) enters the methane-producing zone (120) through the U-shaped pipe (330);
• a baffle (400) is arranged between the acid-producing zone (110) and the methane-producing zone (120), and the baffle (400) is located between two open ends of the U-shaped pipe (330);
• a pH adjustment port (340) is arranged on a side of the U-shaped pipe (330);
• the pH value of the acid-producing zone (110) is 4.0 to 4.5;
• the pH value of the methane-producing zone (120) is 6.8 to 8.5;
• the first alloy catalyst zone (310) and the second alloy catalyst zone (320) is filled with porous alloy catalyst material, and the porous alloy catalyst material is a cylindrical body material composed of 30% to 50% Zn, 15% to 35% Cu, 10% to 30% Co, 5% to 20% Ni, 0.5% to 10% Fe, and 0.1% to 5% Sn by mass percentage;
• multiple channels are arranged along an axial direction of the cylindrical body to increase a contact surface area between the catalyst and the water flow.