A waste heat recovery and utilization system for soil thermal restoration
A waste heat recovery and soil heat technology, applied in preheating, feed water heaters, lighting and heating equipment, etc., can solve the problems of high flue gas discharge temperature, waste of effective heat energy, environmental thermal pollution, etc., to reduce the discharge temperature, improve Effectiveness of Utilization Efficiency and Energy Consumption Reduction
Active Publication Date: 2020-12-01
TIANJIN UNIV
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Problems solved by technology
However, the overall discharge temperature of flue gas is still relatively high, which wastes a lot of effective heat energy and causes certain thermal pollution to the environment.
Method used
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[0013] Such as Figures 1 to 3 As shown, a waste heat recovery and utilization system for soil thermal restoration includes a boiler 2, a pulverized coal burner 9, a water-cooled jacket 1, a flue 21, a first economizer 31, a second economizer 32, a first The heat exchanger 51 and the exhaust pipe 6 are provided with a pulverized coal preheater 8 and a heat exchange coil 7 in the flue 21, and the pulverized coal preheater 8 includes multiple One heat pipe 82, the upper and lower ends of each heat pipe 82 are respectively assembled in a collection cover 81, the collection cover 81 above the heat pipe 82 is connected to the coal powder source through the feed pipe, and the bottom collection cover 81 is passed through the discharge pipe Connected to the pulverized coal burner 9, the upper end of the heat exchange coil 7 is connected to the air source through the intake pipe, and the lower end is connected to the pulverized coal burner 9 through the exhaust pipe, and the unloader 1...
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The invention discloses a waste heat recycling system for soil thermal remediation. The waste heat recycling system for soil thermal remediation comprises a boiler, a pulverized coal burner, a water-cooling jacket, a flue, a first economizer, a second economizer, a first heat exchanger and a smoke exhaust pipe. The pulverized coal burner and a heat exchange coil are arranged in the flue. The pulverized coal burner comprises a plurality of heat conducting pipes arranged vertically or obliquely in the flue. The upper ends and the lower ends of the heat conducting pipes are assembled in two collection covers correspondingly. The collection cover at the upper ends of the heat conducting pipes communicate with a pulverized coal source through an exhaust pipe, and the collection cover at the lower ends of the heat conducting pipes communicate with the pulverized coal burner. The upper end of the heat exchange coil communicates with an air source through an air inlet pipe, and the lower end of the heat exchange coil communicates with the pulverized coal burner through a discharge pipe. The two collection covers are both provided with dischargers. The waste heat recycling system for soil thermal remediation can preheat pulverized coal and air in advance through flue gas waste heat of the boiler used during soil remediation, greatly improves the heat exchange efficiency and improves theheat exchange efficiency of a whole boiler system.
Description
technical field [0001] The invention relates to a waste heat recovery and utilization system for soil thermal restoration. Background technique [0002] Thermal desorption is also called thermal desorption. As a non-combustion technology, it is one of the effective technologies for remediating volatile / semi-volatile organic polluted soil. Due to its wide range of treatment and remediation in different places, thermal desorption technology has been It has been successfully applied to the remediation of soil contaminated by chlorinated organic pollutants, polycyclic aromatic hydrogen, organic pesticides, herbicides, etc. The boiler exhaust gas used in thermal desorption technology is directly discharged into the atmosphere. According to reliable estimates, about 20%-50% of the heat energy is discharged into the atmosphere in the form of waste heat, especially low-quality waste heat. Therefore, effective recovery of low-quality waste heat resources is an important means of ene...
Claims
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IPC IPC(8): F23K1/04F23K3/00F23L15/00F22D1/02
CPCF22D1/02F23K1/04F23K3/00F23K2203/103F23L15/00Y02E20/34
Inventor 何理李鹏颜鹏东焦蒙蒙冯立阳
Owner TIANJIN UNIV