US 11,939,238 B2
Apparatus and method for hydrate-based wastewater treatment and cold storage
Lunxiang Zhang, Liaoning (CN); Yongchen Song, Liaoning (CN); Xiaodong Wu, Liaoning (CN); Jiazhu Bao, Liaoning (CN); Chuanxiao Cheng, Liaoning (CN); Zheng Ling, Liaoning (CN); Jie Wang, Liaoning (CN); Fan Wang, Liaoning (CN); Yu Liu, Liaoning (CN); Lei Yang, Liaoning (CN); Mingjun Yang, Liaoning (CN); Yanghui Li, Liaoning (CN); and Peng Wu, Liaoning (CN)
Assigned to DALIAN UNIVERSITY OF TECHNOLOGY, Liaoning (CN)
Filed by DALIAN UNIVERSITY OF TECHNOLOGY, Liaoning (CN)
Filed on May 15, 2023, as Appl. No. 18/317,098.
Claims priority of application No. 202210528011.1 (CN), filed on May 16, 2022.
Prior Publication US 2023/0365431 A1, Nov. 16, 2023
Int. Cl. C02F 1/04 (2023.01); C02F 1/00 (2023.01); C02F 1/68 (2023.01)
CPC C02F 1/048 (2013.01) [C02F 1/002 (2013.01); C02F 1/683 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An apparatus for hydrate-based wastewater treatment and cold storage, comprising a water chilling unit, a heat exchange system, a finned tube heat exchanger, a first two-way valve, a second two-way valve, a system monitoring device, a wastewater tank, a spraying device, a wastewater treatment and cold storage tank, a water layer positioning device, a return tank, a temperature sensor group, an evaporator coil, a first branch pipeline, a second branch pipeline, a third branch pipeline, a fourth branch pipeline, a fifth branch pipeline, a sixth branch pipeline, a seventh branch pipeline, a filter screen disc, and an eighth branch pipeline, wherein
the finned tube heat exchanger is arranged in the heat exchange system;
an outlet end of the water chilling unit is connected to an inlet of the finned tube heat exchanger through the first branch pipeline, and an inlet end of the water chilling unit is connected to an outlet of the finned tube heat exchanger through the fourth branch pipeline; a first solution pump, a first flow meter, a first one-way valve, a second one-way valve, and a second solution pump are sequentially arranged on the first branch pipeline along a flow direction of a secondary refrigerant; a third one-way valve, a fourth one-way valve, and a second flow meter are sequentially arranged on the fourth branch pipeline along the flow direction of the secondary refrigerant;
the wastewater treatment and cold storage tank is a double-layer sealed container, a first air pump is arranged at an upper end of an outer wall of the wastewater treatment and cold storage tank, a concentrated wastewater discharge pipe is arranged at a lower end of the outer wall of the wastewater treatment and cold storage tank, a fifth one-way valve is arranged on the concentrated wastewater discharge pipe, the spraying device and a two-way air valve are arranged at a top of an inner tank of the wastewater treatment and cold storage tank, the filter screen disc is arranged at a lower portion of the inner tank of the wastewater treatment and cold storage tank, a gas generator is arranged on an upper side of a surface of the filter screen disc, and the gas generator is connected to a second air pump; a bottom of the inner tank of the wastewater treatment and cold storage tank is ellipsoidally depressed, and is provided with a solid-liquid separation switch, and a sealing ring is sleeved over a periphery of the solid-liquid separation switch;
the evaporator coil is located at a center of the inner tank of the wastewater treatment and cold storage tank, the inner tank of the wastewater treatment and cold storage tank is filled with a hydrate former, the temperature sensor group and the water layer positioning device are arranged in the wastewater treatment and cold storage tank, and a terminal of the temperature sensor group and a terminal of the water layer positioning device are connected to the system monitoring device; the first branch pipeline between the first one-way valve and the second one-way valve is connected to a first end of the evaporator coil through the second branch pipeline, the fourth branch pipeline between the third one-way valve and the fourth one-way valve is connected to a second end of the evaporator coil through the third branch pipeline, the second two-way valve is arranged on the second branch pipeline, and the first two-way valve is arranged on the third branch pipeline;
the fifth branch pipeline, the sixth branch pipeline, and the eighth branch pipeline are arranged outside the wastewater treatment and cold storage tank, an upper end of the fifth branch pipeline is in communication with the wastewater tank, and a lower end of the fifth branch pipeline is in communication with the top of the inner tank of the wastewater treatment and cold storage tank; the spraying device is sequentially connected to a sixth one-way valve, the sixth branch pipeline, a seventh one-way valve, and a third solution pump to be in communication with the return tank, and is configured to spray water in the return tank into the inner tank of the wastewater treatment and cold storage tank; the sixth branch pipeline is additionally connected to the eighth branch pipeline, and the eighth branch pipeline is sequentially connected to an eighth one-way valve and a fourth solution pump to be in communication with the return tank; the sixth branch pipeline is additionally connected to the seventh branch pipeline, and the seventh branch pipeline is sequentially connected to a ninth one-way valve and a telescopic pipe; the telescopic pipe extends into the inner tank of the wastewater treatment and cold storage tank, and is configured to draw water formed from a hydrate decomposition back to the return tank; and
an air thermal insulation layer is arranged between an outer shell of the wastewater treatment and cold storage tank and the inner tank of the wastewater treatment and cold storage tank.