Rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free seating system

Abstract

The present invention discloses a rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system. The rotary gas-gas heat exchanger comprises: a shell; a rotor, which is arranged in said shell and is driven to rotate with respect to said shell; a sealing system, which is arranged between said shell and a spindle of said rotor, and divides the space between said shell and the spindle of said rotor into an original flue gas circulation zone and a clean flue gas circulation zone. Said sealing system comprises two pairs of sealing plates which are located at the upper and lower sides respectively and are opposite to each other. Said two sealing plates are provided with at least one pair of holes which face with each other. Said at least one pair of holes communicate with a fan.

What is claimed is: 
     
         1 . A rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system, comprising:
 a shell;   a rotor, which is arranged in said shell and is driven to rotate with respect to said shell;   a sealing system, which is arranged between said shell and a spindle of said rotor, and divides the space between said shell and the spindle of said rotor into an original flue gas circulation zone and a clean flue gas circulation zone;   wherein said sealing system comprises two pairs of sealing plates which are located at the upper and lower sides respectively and are opposite to each other, said two sealing plates are provided with at least one pair of holes which face with each other, and said at least one pair of holes communicate with a fan.   
     
     
         2 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 1 , wherein a ring-shaped rack is arranged at the periphery of said rotor, a driving mechanism drives said rotor through a transmission mechanism, and the transmission mechanism is provided with a gear member which engages with the ring-shaped rack. 
     
     
         3 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 1 , wherein said rotor comprises a spindle and a plurality of radial sealing sheets which extend outward from the spindle, and each sealing plate comprises two upper and lower fan-shaped sealing plates which extend from an edge of the shell and collect at the spindle of the rotor and which face radial sealing sheets of the rotor. 
     
     
         4 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 1 , wherein an arc length of the outer edge of each fan-shaped sealing plate is 1/10- 1/15 of the arc length of the edge of the shell. 
     
     
         5 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 1 , wherein said at least one pair of holes are three pairs of square holes, and said three pairs of square holes have a width which increases gradually from the center to periphery of the rotor. 
     
     
         6 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 1 , wherein said fan is a low-leakage fan, which communicates with all holes in said at least one pair of holes via low-leakage air pipelines. 
     
     
         7 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 1 , wherein said original flue gas circulation zone communicates with said pipeline for the original flue gas, while said cold clean flue gas circulation zone communicates with the clean flue gas pipelines, and the flow direction of the original flue gas is opposite to the transfer direction of the clean flue gas. 
     
     
         8 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 1 , wherein two pressure sensors are arranged at an output end of said fan and a pipeline for the original flue gas respectively, both pressure sensors are in communication with a controller, and said controller controls the opening degree of an outlet valve of the fan or the power of the fan according to values of said two pressure sensors. 
     
     
         9 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 1 , wherein two pressure sensors are arranged at an output end of said fan and a pipeline for the original flue gas respectively, a differential pressure transducer is connected between said two pressure sensors, said differential pressure transducer transfers in real time a differential pressure between said two pressure sensors to a controller, and said controller controls the opening degree of an outlet valve of the fan or the power of the fan according to said differential pressure. 
     
     
         10 . The rotary gas-gas heat exchanger with an isolating air curtain structure of a leak-free sealing system of  claim 9 , wherein said differential pressure is set so that the pressure at the output end of the said fan is larger than the pressure at said pipeline for the original flue gas by 300˜500 Pa.