A sludge dewatering and incineration system
By simplifying the sludge treatment process and adopting a sludge dewatering and incineration system with chemical conditioning and high-efficiency dewatering, the problems of long process flow and numerous equipment in traditional processes have been solved, achieving low-cost and high-efficiency sludge treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI GUOLIAN ENVIRONMENTAL SCI & TECH
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional sludge incineration processes are lengthy, involve multiple types of equipment, increase investment and operating costs, and are difficult to manage.
A sludge dewatering and incineration system was designed, including components such as a sludge storage silo, a chemical dosing and conditioning machine, a temporary storage tank, a screw pump, a stacked filter press, and a fluidized bed incinerator. The system simplifies the process flow, allowing for direct incineration after chemical dosing and efficient dewatering, thereby reducing the number of equipment and the floor space required.
It achieves sludge treatment with simple structure, small footprint, and low investment and operating costs, improving operational convenience and management efficiency.
Smart Images
Figure CN224580278U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of municipal sludge treatment and disposal, specifically a sludge dewatering and incineration system. Background Technology
[0002] Incineration technology offers significant advantages in sludge treatment, including substantial volume reduction, smaller footprint (compared to sludge composting), lower odor generation, and the ability to recover waste heat. Traditional sludge incineration processes require deep dewatering of the sludge before selecting a suitable drying process (such as belt drying, disc drying, thin-layer drying, or paddle drying) to further reduce the moisture content of the dewatered sludge before it enters the sludge incinerator for combustion.
[0003] This process is relatively long and involves many facilities and equipment (dewatering equipment, drying equipment, incineration equipment, conveying equipment, storage equipment, etc.), which increases the investment and operating costs of sludge incineration projects. In daily production, the long process significantly increases management difficulty and maintenance workload, resulting in low operational convenience and smoothness. Summary of the Invention
[0004] To address the aforementioned technical problems, this invention proposes a sludge dewatering and incineration system that can save on land area, investment, and operating costs.
[0005] The technical solution is as follows: a sludge dewatering and incineration system, comprising a sludge dewatering system and a sludge incineration system, characterized in that the sludge dewatering system comprises a sludge storage silo, a plunger pump, a chemical dosing conditioner, a temporary storage tank, a screw pump, and a stacked filter press connected in sequence; the sludge incineration system comprises a dewatered sludge cake silo, a feeding hopper, a conveyor belt, a furnace front silo, a furnace feed screw, and a fluidized bed incinerator arranged in sequence; the fluidized bed incinerator is connected to a flue gas purification device, a cooling tower, and an ash silo.
[0006] A further feature is that the dosing and conditioning machine includes a conditioning machine housing, a sludge conveying pipe is provided at the top of the conditioning machine housing, a feeding chamber is provided inside the conditioning machine housing that communicates with the sludge conveying pipe, a main baffle and a branch baffle are provided in the feeding chamber, an inclined plate is provided on the outer wall of the conditioning machine housing, a chemical injection port is provided on the inclined plate, the chemical injection port is connected to the chemical conveying pipe, and the lower part of the conditioning machine housing is open and a conditioning machine conveyor belt is provided below it;
[0007] The stacked filter press includes an intermediate filter press station and sludge feeding and unloading stations arranged symmetrically on the left and right. A movable filter cloth frame is provided between the intermediate filter press station and the sludge feeding and unloading stations. A sludge feeding device is provided next to the sludge feeding and unloading stations. The dewatering cake bin is provided below the sludge feeding and unloading stations. A hydraulic filter press device is provided above the intermediate filter press station and a filtrate tank is provided below it.
[0008] The filter cloths within the filter cloth frame are stacked back and forth in the horizontal direction;
[0009] The feeding hopper is equipped with a weighing and metering module;
[0010] A grabber is installed between the feeding hopper and the dewatering cake bin;
[0011] The fluidized bed incinerator is a bubbling fluidized bed incinerator;
[0012] The flue gas purification device includes a desulfurization tower, an SNCR reactor, and a dust collector.
[0013] After adopting this utility model, the sludge is first conditioned by a chemical dosing and conditioning machine, and then the water is filtered out by a pressure filter to obtain a dry sludge cake, which is then incinerated. Compared with the traditional drying process, it has a simple structure, small footprint, and low investment and operating costs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the system of this utility model;
[0015] Figure 2 This is a schematic diagram of a medication dispensing and conditioning machine;
[0016] Figure 3 This is a schematic diagram of a stacked filter press. Detailed Implementation
[0017] See Figure 1 As shown, a sludge dewatering and incineration system includes a sludge dewatering system and a sludge incineration system. The sludge dewatering system includes a sludge storage silo, a plunger pump, a chemical dosing and conditioning machine, a temporary storage tank, a screw pump, and a stacked filter press, connected in sequence. The sludge incineration system includes a dewatered sludge cake silo, a feeding hopper, a conveyor belt, a furnace front silo, a furnace feed screw, and a fluidized bed incinerator, arranged in sequence. The fluidized bed incinerator is connected to a flue gas purification device, a cooling tower, and an ash silo. The flue gas purification device is also connected to a chimney. A weighing and metering module is installed on the feeding hopper, and a grabber is installed between the feeding hopper and the dewatered sludge cake silo. The fluidized bed incinerator is a bubbling fluidized bed incinerator, and the flue gas purification device includes a desulfurization tower, an SNCR reactor, and a dust collector.
[0018] See Figure 2As shown, the dosing conditioning machine includes a conditioning machine housing 21. A sludge conveying pipe 20 is installed on the top of the conditioning machine housing 21. The conditioning machine housing 32 has an inlet chamber connected to the sludge conveying pipe 20. The inlet chamber is equipped with a main baffle 22 and a branch baffle 23 to separate the incoming sludge into multiple downward flows, which facilitates uniform contact with the agent. An inclined plate 24 is installed on the outer wall of the conditioning machine housing 21. A row of agent spray nozzles 26 are evenly arranged on the inclined plate 14. The agent spray nozzles 26 are connected to the agent conveying pipe 25. The conditioning machine housing 21 has an opening at the bottom and a conditioning machine conveyor belt 28 is installed below it. The sludge comes into contact with the agent to obtain conditioned sludge 27, which finally falls onto the conditioning machine conveyor belt 28.
[0019] The stacked filter press includes an intermediate filter press station 6 and sludge feeding and unloading stations 5 arranged symmetrically on the left and right. A movable filter cloth frame 2 is installed between the intermediate filter press station 6 and the sludge feeding and unloading stations 5. Filter cloths 3 within the filter cloth frame 2 are stacked horizontally. A sludge feeding device 1 is installed next to the sludge feeding and unloading stations 5. A dewatering cake bin 8 is installed below the sludge feeding and unloading stations 5. A hydraulic filter press device 4 is installed above the intermediate filter press station 6, and a filtrate tank 7 is installed below it. The contents enter the stacked filter press. Under the action of the sludge feeding device 1, the sludge is spread in layers on the filter cloth 3. When the filter cloth 3 in the filter cloth frame 2 at the sludge feeding unloading station 5 is full, the feeding stops. The filter cloth frame 2 moves to the intermediate filter press station 6 through the guide rail. Through the squeezing of the hydraulic filter press device 4, the water is discharged from the sludge and flows into the filtrate tank 7. After the sludge dewatering is completed, the filter cloth frame 2 returns to the sludge feeding unloading station 5 through the guide rail. The sludge feeding device 1 unfolds the filter cloth 3, and the dewatered cake falls off the filter cloth 3 and enters the dewatered cake bin 8. The sludge feeding and unloading stations are symmetrically distributed on the left and right sides, and can alternate between feeding, pressing, and unloading. That is, when the filter cloth is being fed at the feeding and unloading station on the left, the filter cloth frame at the feeding and unloading station on the right can be transferred to the pressing station for pressing. After pressing, it returns to the feeding and unloading station on the right for unloading. The pressing frame at the feeding and unloading station on the left, which has finished feeding, can be transferred to the pressing station for pressing, and so on.
[0020] The sludge received by the sludge storage silo is the initial dewatered sludge from the wastewater treatment plant, with a moisture content ranging from 78% to 85%. This municipal sludge is pumped via a plunger pump and enters a chemical conditioning machine, where it is uniformly mixed with sludge conditioning agents to complete the conditioning process. After conditioning, the sludge enters a temporary storage tank. From there, it is fed into a multilayer filter press via a screw pump. After high-pressure dewatering in the filter press, the moisture content of the sludge is reduced to below 60%, resulting in a thin, flaky sludge cake (7-8 mm thick). This cake enters the dewatered sludge cake silo. A grabber picks up the cake and places it in the feeding hopper. The cake is weighed and then conveyed by a conveyor belt into the furnace feed silo. Under the action of the feed screw, it enters the bubbling fluidized bed incinerator for combustion. The hot flue gas after sludge incineration passes through heat exchangers and air preheaters in the incinerator flue. Dust, sulfides, and nitrogen oxides in the flue gas are discharged through the chimney after passing through dust collectors, desulfurizers, and denitrification reactors. The ash produced by sludge incineration enters the ash storage, and a small amount of residual heat is cooled by a cooling tower.
Claims
1. A sludge dewatering and incineration system, comprising a sludge dewatering system and a sludge incineration system, characterized in that, The sludge dewatering system includes a sludge storage silo, a plunger pump, a chemical dosing and conditioning machine, a temporary storage tank, a screw pump, and a stacked filter press connected in sequence. The sludge incineration system includes a dewatered sludge cake silo, a feeding hopper, a conveyor belt, a furnace front silo, a furnace feed screw, and a fluidized bed incinerator arranged in sequence. The fluidized bed incinerator is connected to a flue gas purification device, a cooling tower, and an ash silo.
2. The sludge dewatering and incineration system according to claim 1, characterized in that, The dosing and conditioning machine includes a conditioning machine housing, a sludge conveying pipe at the top of the conditioning machine housing, a feed chamber inside the conditioning machine housing that connects to the sludge conveying pipe, a main baffle and a branch baffle inside the feed chamber, an inclined plate on the outer wall of the conditioning machine housing, a chemical injection port on the inclined plate that connects to the chemical conveying pipe, and an opening at the bottom of the conditioning machine housing with a conditioning machine conveyor belt below it.
3. The sludge dewatering and incineration system according to claim 1, characterized in that, The stacked filter press includes an intermediate filter press station and sludge feeding and unloading stations arranged symmetrically on the left and right. A movable filter cloth frame is provided between the intermediate filter press station and the sludge feeding and unloading stations. A sludge feeding device is provided next to the sludge feeding and unloading stations. The dewatering cake bin is provided below the sludge feeding and unloading stations. A hydraulic filter press device is provided above the intermediate filter press station and a filtrate tank is provided below it.
4. The sludge dewatering and incineration system according to claim 3, characterized in that, The filter cloths within the filter cloth frame are stacked back and forth in the horizontal direction.
5. The sludge dewatering and incineration system according to claim 1, characterized in that, The feeding hopper is equipped with a weighing and metering module.
6. The sludge dewatering and incineration system according to claim 1, characterized in that, A grabber is installed between the feeding hopper and the dewatering cake bin.
7. The sludge dewatering and incineration system according to claim 1, characterized in that, The fluidized bed incinerator is a bubbling fluidized bed incinerator.
8. The sludge dewatering and incineration system according to claim 1, characterized in that, The flue gas purification device includes a desulfurization tower, an SNCR reactor, and a dust collector.