Specialized air distribution system and air distribution method for a waste incinerator with sludge co-incineration

Abstract

A specialized air distribution system for a waste incinerator with sludge co-incineration includes a furnace, primary air circulation cycle and secondary air circulation cycle. The primary air circulation cycle involves arranging a flue gas suction port on side wall of upper part of the furnace connected to a first ejector, connecting a primary air fan to the first ejector, connecting an outlet of first ejector to a primary air main pipe, and connecting the primary air main pipe to multiple primary air inlets at lower part of the furnace through multiple output ports. The secondary air circulation cycle involves connecting a steam drum arranged above the furnace to a second ejector via a high-pressure steam pipe, connecting an outlet of the second ejector to a secondary air inlet on side wall of the rear arch outlet of the furnace, and connecting a secondary air fan to the second ejector.

What is claimed is: 
     
         1 . A specialized air distribution system for a waste incinerator with sludge co-incineration, comprising a furnace, a primary air circulation cycle system, and a secondary air circulation cycle system;
 wherein the primary air circulation cycle system comprises a first ejector, a primary air fan, and a primary air main pipe; a circulating flue gas suction port is provided on a side wall of the upper part of the furnace and connected to the first ejector;   wherein the primary air fan is connected to the first ejector; an outlet of the first ejector is connected to the primary air main pipe; the primary air main pipe is connected to multiple primary air inlets at the lower part of the furnace through multiple output ports arranged on the primary air main pipe;   wherein the secondary air circulation cycle system comprises a second ejector, a steam drum, and a secondary air fan; the steam drum arranged above the furnace is connected to the second ejector through a high-pressure steam pipe; an outlet of the second ejector is connected to a secondary air inlet on the rear arch outlet of the furnace; and the secondary air fan is connected to the second ejector.   
     
     
         2 . The specialized air distribution system for a waste incinerator with sludge co-incineration of  claim 1 , wherein high-temperature flue gas below the front arch area within the furnace forms an α-shaped flow. 
     
     
         3 . The specialized air distribution system for a waste incinerator with sludge co-incineration of  claim 2 , wherein a rear arch inclination angle β of the furnace is required ≥26°, and a front arch inclination angle of the furnace is α≥35°. 
     
     
         4 . The specialized air distribution system for a waste incinerator with sludge co-incineration of  claim 3 , wherein geometric parameters of the front arch of the furnace should satisfy the following requirements: the angle δ between momentum I of the synthesized gas flow and the front arch is required ≥120°, and its momentum synthesis angle γ is required ≤30°. 
     
     
         5 . The specialized air distribution system for a waste incinerator with sludge co-incineration of  claim 4 , wherein the secondary air nozzles are circular, numbering 8-10, with a diameter of 110 mm. 
     
     
         6 . A specialized air distribution method for a waste incinerator with sludge co-incineration, wherein based on the specialized air distribution system for a waste incinerator with sludge co-incineration according to  claim 1 , by adjusting the inclination angle β of the rear arch and the inclination angle α of the front arch, and determining the flow rate, jet velocity, and downward jet angle of the secondary air, the high-temperature flue gas below the front arch area in the furnace chamber is made to form an α-shaped flow. 
     
     
         7 . The specialized air distribution method for a waste incinerator with sludge co-incineration of  claim 6 , wherein when forming the α-shaped flue gas flow below the front arch area within the furnace of the incinerator: the rear arch inclination angle β is required ≥26°, the front arch inclination angle α is required ≥35°, the injection velocity of the secondary air is greater than or equal to 50 m/s, the flow volume of the secondary air accounts for 15% of the total air volume, the downward injection angle θ is required ≥5°; the secondary air nozzles are circular, numbering 8-10, with a diameter of 110 mm. 
     
     
         8 . The specialized air distribution method for a waste incinerator with sludge co-incineration of  claim 7 , wherein the momentum synthesis angle γ of the synthesized gas flow is required ≤30°, and the angle δ between the momentum I of the synthesized gas flow and the front arch is required ≥120°.