| CPC C02F 9/00 (2013.01) [B01D 21/0006 (2013.01); B01D 21/0039 (2013.01); B01D 21/0087 (2013.01); B01F 27/191 (2022.01); B01F 27/90 (2022.01); B01F 35/1452 (2022.01); B09C 1/002 (2013.01); B09C 1/06 (2013.01); C02F 1/008 (2013.01); B01F 2101/305 (2022.01); B09C 2101/00 (2013.01); C02F 1/004 (2013.01); C02F 2001/007 (2013.01); C02F 1/68 (2013.01); C02F 2101/30 (2013.01); C02F 2103/06 (2013.01); C02F 2209/02 (2013.01); C02F 2209/42 (2013.01)] | 1 Claim |
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1. A control method of a sewage treatment device for a thermal desorption system, wherein sewage treatment device for the thermal desorption system comprises the thermal desorption system and a sewage treatment assembly connected with the thermal desorption system;
the sewage treatment assembly comprises a particle precipitation tank for removing first particles of suspended matters in sewage, a chemical purification tank for removing organic matters of the suspended matters in the sewage and a filter tank for removing second particles of the suspended matters in the sewage, which are connected in turn; and wherein the first particles have a larger particle size than the second particles;
the particle precipitation tank comprises a stirring cavity and a contaminant collection cavity, the stirring cavity is provided with a stirring mechanism, and the stirring mechanism comprises a stirring shaft and a first motor for driving the stirring shaft to rotate, the stirring shaft is provided with a plurality of groups of stirring blades along a length direction of the stirring shaft, the plurality of groups of stirring blades are unequal in length with each other, upper and lower sides of the plurality of groups of stirring blades are provided with a plurality of water barrier columns, and the water barrier columns are provided with a plurality of holes;
the chemical purification tank comprises a purification cavity, a top of the chemical purification tank is provided with a chemical agent storage box in which a plurality of chemical agent storage bottles are arranged, the chemical agent storage bottles are matched and connected with ends of first drain pipes, other ends of the first drain pipes are matched and connected with chemical agent control mechanisms, the chemical agent control mechanisms are matched and connected with second drain pipes, and the second drain pipes extend into the purification cavity;
the filter tank comprises a filter cavity in which a multi-layer filter screen is arranged from top to bottom;
the stirring cavity is also provided with a cleaning mechanism, the cleaning mechanism comprises a second motor, an output end of the second motor is matched and connected with a telescopic push rod, a tail end of the telescopic push rod is matched and connected with a circular sweep ring, the circular sweep ring is provided with a groove, a side wall of the groove is circumferentially provided with a plurality of spray nozzles at intervals, the stirring cavity is isolated from the contaminant collection cavity through a funnel-shaped spacer plate, a caliber of an upper end of the funnel-shaped spacer plate is larger than that of a lower end of the funnel-shaped spacer plate, a side of the funnel-shaped spacer plate is conical, and a bottom of the contaminant collection cavity is provided with a drain outlet;
each of the chemical agent control mechanisms comprises a first connection plate and a second connection plate, the first connection plate is provided with a first through hole, the second connection plate is provided with a second through hole, a liquid plugging plate is arranged between the first connection plate and the second connection plate, the liquid plugging plate is provided with a third through hole, one side of the first connection plate is fixedly connected with an adjusting seat, the adjusting seat is provided with a guide plate, an electromagnetic block and a sliding block, the liquid plugging plate is fixedly connected with ends of a plurality of connection rods, and other ends of the connection rods penetrate through the guide plate and are fixedly connected with the sliding block;
the chemical purification tank is provided with a first sensor for detecting temperature information of the sewage in the purification cavity, a second sensor for detecting liquid level information of the sewage in the purification cavity and a third sensor for detecting concentration information and type information of the organic matters in the sewage in the purification cavity;
the thermal desorption system comprises an extraction system, an evaporator, a water-vapor separator and a burner which are connected in turn, the extraction system extracts water vapor in an extraction well to the evaporator, water vapor is cooled by the evaporator and then output to the water-vapor separator, and then separated to form the sewage and waste gas, the sewage obtained after separation is transported to the sewage treatment assembly to be purified, and the waste gas obtained after separation is transported to the burner to be purified;
each of the connection rods is sleeved with a telescopic spring, one end of the telescopic spring is fixedly connected with the guide plate, another end of the telescopic spring is fixedly connected with the sliding block, a bottom of the adjusting seat is provided with a sliding slot, the sliding block is embedded into the sliding slot, and a plurality of infrared sensors for detecting position information of the sliding block are arranged in the sliding slot at intervals along a length direction of the sliding slot;
the chemical purification tank is provided with a temperature control mechanism, the temperature control mechanism comprises a wrapping layer, a temperature control flow channel and a condenser, the wrapping layer is wrapped on a circumferential wall of the chemical purification tank, the temperature control flow channel surrounds in the wrapping layer from top to bottom, and the temperature control flow channel is connected with the condenser;
the thermal desorption system further comprises the condenser, a flash tank and a steam injection well, an output end of the evaporator is communicated with an input end of the condenser through a first conveyer pipe, an output end of the condenser is communicated with an input end of the evaporator through a second conveyer pipe, the first conveyer pipe is provided with a compressor, the second conveyer pipe is provided with a throttling device, the condenser is also connected with the sewage treatment assembly and the flash tank, the sewage treated by the sewage treatment assembly is purified to form clean water to flow back to the condenser for heat exchange, and then the clean water enters the flash tank to be transformed into steam to enter the steam injection well, wherein the control method of the sewage treatment device comprises the following steps:
pretreating sewage through the stirring mechanism, performing friction extrusion on sewage through the plurality of groups of stirring blades to destroy stability of the first particles of the suspended matters in sewage so that the first particles of the suspended matters are adsorbed with each other to be precipitated;
primarily treating the sewage to remove the organic matters by using a chemical agent;
posttreating the sewage through a multi-stage filter screen to filter the second particles of the suspended matters in the sewage and then purify the sewage to form clean water;
the control method of the sewage treatment device further comprises the following steps:
acquiring the concentration information and the type information of the organic matters in the sewage;
controlling one of the chemical agent control mechanisms connected to a corresponding one of the chemical agent storage bottles to be started according to the type information of the organic matters so as to add the corresponding chemical agent into the chemical purification tank;
controlling power-on time of the electromagnetic block on the corresponding chemical agent control mechanism according to the concentration information of the organic matters so as to add a corresponding amount of the chemical agent into the chemical purification tank;
detecting the liquid level information of the sewage in the purification cavity through the second sensor and then calculating volume of the sewage currently required to be purified;
detecting the type information and the concentration information of the organic matters through the third sensor;
calculating a type and addition amount of the chemical agent required to be added by a data processor on a control system according to the volume of the current sewage, the type information of the organic matters and the concentration information of the organic matters;
controlling the power-on of the electromagnetic block on the corresponding chemical agent storage bottle by the control system so that the corresponding chemical agent is added into the purification cavity; and
controlling the addition amount of the chemical agent by controlling the power-on time of the electromagnetic block so that the chemical agent reacts with the organic matters in the sewage to remove the organic matters in sewage.
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