A low-chlorine deslagging waste incineration fly ash in-situ treatment system
By treating fly ash from waste incineration with water washing, sedimentation, ultrafiltration, nanofiltration, and reverse osmosis, chloride salts in the fly ash are removed, solving the problem that fly ash granules still contain chloride salts after sintering. This achieves harmless treatment and resource recycling, improving environmental protection and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN ZHIHENG ENVIRONMENTAL SAFETY ENG TECH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-07-17
AI Technical Summary
In existing waste incineration fly ash treatment technologies, fly ash pellets still contain chloride salts after sintering, which affects their performance as building materials and may cause environmental pollution.
The flight is described using a water washing machine and a dehydrator. Note the output content. The flight is described by introducing the water washing machine and the dehydrator. The water washing machine is used to wash the fly ash. Combined with the step-by-step treatment of the dehydrator, sedimentation tank, ultrafiltration device, nanofiltration device and reverse osmosis device, the flight is described by introducing the water washing machine and the dehydrator. The fly ash is washed by introducing the water washing machine. Combined with the step-by-step treatment of the dehydrator, sedimentation tank, ultrafiltration device, nanofiltration device and reverse osmosis device, the chloride salts in the fly ash are removed.
It effectively removes chloride salts from fly ash, ensuring that the sintered fly ash granules meet the harmless standard and can be used directly as building materials. This improves the environmental friendliness and safety of fly ash treatment and realizes the recycling of water resources and the recovery of salts.
Smart Images
Figure CN224507997U_ABST
Abstract
Claims
1. A low-chlorine slag discharge waste incineration fly ash on-site treatment system, comprising an incinerator (1), wherein the lower end of the incinerator (1) is provided with a first ash discharge port (2), the upper end of the incinerator (1) is connected to a high-temperature flue (3), the flue of the high-temperature flue (3) is connected to a waste heat exchange boiler (4), the flue of the waste heat exchange boiler (4) is connected to a semi-dry tower (5), the flue of the semi-dry tower (5) is connected to a bag filter (6), the flue of the bag filter (6) is connected to a fan (7), and the fan (7) is connected to a chimney (8); both the lower end of the semi-dry tower (5) and the lower end of the bag filter (6) are provided with a primary ash discharge port, the primary ash discharge port being connected to a first ash storage tank (9); The system includes a fly ash sintering furnace (10), which is equipped with burners inside. The fly ash sintering furnace (10) is connected to a secondary flue gas inlet pipe (11), which is connected to the high-temperature flue (3). The fly ash sintering furnace (10) is connected to a secondary exhaust pipe (12), which is connected to the waste heat exchange boiler (4). characterized in that The discharge port of the first ash storage tank (9) is connected to a washing machine (13) for washing fly ash; the discharge port of the washing machine (13) is connected to a dewatering machine (14) for dewatering fly ash; the discharge port of the dewatering machine (14) is connected to a conditioning tank (15) for conditioning fly ash; the discharge port of the conditioning tank (15) is connected to a granulator (16) for forming fly ash granules; the discharge port of the granulator (16) is connected to a curing tank (17) for curing fly ash granules; the discharge port of the curing tank (17) is connected to the fly ash sintering furnace (10) for feeding.
2. A low-chlorine de-sludging system for in-situ treatment of waste incineration fly ash according to claim 1, characterized in that, Both the washing machine (13) and the dehydrator (14) are provided with drain ports, and both drain ports are connected to the sedimentation tank (18); the drain ports of the sedimentation tank (18) are connected in sequence to the ultrafiltration device (19), the nanofiltration device (20) and the reverse osmosis device (21).
3. A low-chlorine de-sludged MSWI fly ash in-situ treatment system according to claim 2, characterized in that, The sedimentation tank (18) is equipped with a dosing port, which is connected to a dosing tank (22) for adding flocculants and heavy metal chelating agents to the sedimentation tank (18).
4. A low-chlorine de-sludged MSWI fly ash in-situ treatment system according to claim 1, characterized in that, The outlet of the curing tank (17) is connected to the inlet of the fly ash sintering furnace (10) via a screw conveyor.
5. A low-chlorine de-sludged MSWI fly ash in-situ treatment system according to claim 1, characterized in that, The primary ash discharge port is connected to an ash conveying pipe (23), which is connected to a distributor (24). One outlet of the distributor (24) is connected to the first ash storage tank (9), and the other outlet is connected to the second ash storage tank (25). The second ash storage tank (25) is used to discharge the enriched fly ash to the transport vehicle.
6. A low-chlorine de-sludged MSWI fly ash in-situ treatment system according to claim 2, characterized in that, One drain port of the reverse osmosis device (21) is used to discharge the clear liquid, and the other drain port is connected in sequence to the heat exchanger (26), evaporator (27), crystallizer (28), centrifuge (29) and dryer (30).