# US 12,110,244 B2 · Device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling and anaerobic sludge digestion method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,110,244 B2 - Document ID: US12110244B2 - Status: Granted - Kind: B2 - Application number: 17/437,811 - Filed: 2020-08-14 - Published: 2022-10-13 - Granted: 2024-10-08 - Earliest claimed: 2020-05-15 - Assignees: Tongji University - Applicants: Tongji University; Shanghai Urban Pollution Control Engineering Research Center Co., Ltd. - Inventors: Ying Xu; Xiaohu Dai - Web page: https://patentgrep.com/patent/US12110244B2 ## CPC - C02F 3/2866: {Particular arrangements for anaerobic reactors} - C02F 3/006: {Regulation methods for biological treatment} - C02F 11/04: Anaerobic treatment; Production of methane by such processes - C02F 2301/026: Spiral, helicoidal, radial - Y02E 50/30: Fuel from waste, e.g. synthetic alcohol or diesel - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Disclosed are a device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling and an anaerobic sludge digestion method. The device comprises a feeder (A-3, B-3), a conical-coiled pipe coupling reactor (A-1, B-1) and a thermostat (A-4, B-4), wherein the bottom of the feeder (A-3, B-3) communicates with the top of the conical-coiled pipe coupling reactor (A-1, B-1), and the bottom of the feeder (A-3, B-3) is flush with the top of the thermostat (A-4, B-4); the conical-coiled pipe coupling reactor (A-1, B-1) is arranged in the thermostat (A-4, B-4); the whole coupling reactor (A-1, B-1) is in a regular cone shape or an inverted cone shape; and a main body of the coupling reactor (A-1, B-1) is a coiled pipe (A-2, B-2). ## Claims ### Claim 1 A device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling, comprising a feeder, a conical-coiled pipe coupling reactor and a thermostat, wherein a bottom of the feeder communicates with the-a top of the conical-coiled pipe coupling reactor; the conical-coiled pipe coupling reactor is arranged in the thermostat, and a bottom of the conical-coiled pipe coupling reactor extends out of the thermostat and is provided with a discharge hole; the conical-coiled pipe coupling reactor as a whole is in a regular cone shape or an inverted cone shape; a main body of the conical-coiled pipe coupling reactor is a coiled pipe; and a hole is formed in a shoulder of the conical-coiled pipe coupling reactor to collect biogas. ### Claim 2 (depends on 1) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 1, wherein the hole is formed in the shoulder of the coiled pipe in the conical-coiled pipe coupling reactor; and/or a pipe of the coiled pipe in the conical-coiled pipe coupling reactor is made of a heat-conducting and corrosion-resistant material. ### Claim 3 (depends on 2) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 2, wherein an interior of the coiled pipe in the conical-coiled pipe coupling reactor is a uniform surface. ### Claim 4 (depends on 2) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 2, wherein the coiled pipe in the conical-coiled pipe coupling reactor is made of stainless steel; and/or, an inner wall of the conical-coiled pipe coupling reactor is coated with a coating with electrocatalytic activity. ### Claim 5 (depends on 4) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 4, wherein the coating with electrocatalytic activity is a titanium dioxide coating. ### Claim 6 (depends on 1) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 1, wherein an interior of the coiled pipe in the conical-coiled pipe coupling reactor is a uniform surface. ### Claim 7 (depends on 1) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 1, wherein the coiled pipe in the conical-coiled pipe coupling reactor is made of stainless steel; and/or, an inner wall of the conical-coiled pipe coupling reactor is coated with a coating with electrocatalytic activity. ### Claim 8 (depends on 1) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 1, wherein a pretreatment structure is arranged in the feeder. ### Claim 9 (depends on 8) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 8, wherein the pretreatment structure is a screw blade. ### Claim 10 (depends on 1) The device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 1, wherein a temperature of the thermostat is 25-100° C. ### Claim 11 (depends on 1) An anaerobic sludge digestion method using the device for strengthening anaerobic sludge digestion based on conical-coiled pipe coupling according to claim 1, comprising: step 1: treating sludge by a feeder and then enabling the treated sludge to enter a conical-coiled pipe coupling reactor; step 2: adjusting a temperature of a thermostat so that anaerobic microorganisms in the conical-coiled pipe coupling reactor are subjected to constant-temperature culture for 1-40 days, collecting biogas, discharging an anaerobic digestion solution and biogas residues through a discharge hole, and meanwhile, repeating step 1; step 3: repeating step 2 for multiple times to complete starting of the conical-coiled pipe coupling reactor; and step 4: keeping the temperature of the thermostat, repeating step 1 so that retention time of the sludge in the conical-coiled pipe coupling reactor is 12-72 h, and collecting biogas. ### Claim 12 (depends on 11) The method according to claim 11, wherein repeating step 2 for multiple times to complete the starting of the conical-coiled pipe coupling reactor comprises: adjusting the temperature of the thermostat so that anaerobic microorganisms in a conical-coiled pipe coupling reactor are subjected to constant-temperature culture for 10-30 days, collecting biogas, discharging the anaerobic digestion solution and biogas residues through the discharge hole, and meanwhile, repeating step 1; adjusting the temperature of the thermostat so that anaerobic microorganisms in the conical-coiled pipe coupling reactor are subjected to constant-temperature culture for 5-20 days, collecting biogas, discharging the anaerobic digestion solution and biogas residues through the discharge hole, and meanwhile, repeating step 1; and adjusting the temperature of the thermostat so that anaerobic microorganisms in the conical-coiled pipe coupling reactor are subjected to constant-temperature culture for 1-10 days, collecting biogas, discharging the anaerobic digestion solution and biogas residues through the discharge hole to complete the starting of the conical-coiled pipe coupling reactor. ### Claim 13 (depends on 12) The method according to claim 12, wherein, in step 2 and step 4, the temperature of the thermostat is 25-100° C. independently. ### Claim 14 (depends on 12) The method according to claim 12, wherein, in step 2 and step 4, the temperature of the thermostat is 37° C. or 55° C. independently. ### Claim 15 (depends on 12) The method according to claim 12, wherein, in step 4, the retention time of the sludge in the conical-coiled pipe coupling reactor is 12-24 h. ### Claim 16 (depends on 11) The method according to claim 11, wherein, in step 1, a feeder treatment comprises a pretreatment method of strong acid, strong alkali, mechanical stirring, hydrothermal or hydrolase. ### Claim 17 (depends on 11) The method according to claim 11, wherein, in step 2 and step 4, the temperature of the thermostat is 25-100° C. independently. ### Claim 18 (depends on 11) The method according to claim 11, wherein, in step 2 and step 4, the temperature of the thermostat is 37° C. or 55° C. independently.