Furnace slag treatment system
By introducing components such as enclosed slag pools, lightweight walls, and wet electrostatic precipitators into the slag treatment system, a chimney effect is created, solving the problem of steam leakage during water quenching and achieving environmentally friendly and efficient resource recovery in slag treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江苏杭富环保科技有限公司
- Filing Date
- 2025-07-04
- Publication Date
- 2026-05-08
AI Technical Summary
In traditional slag treatment methods, the steam, slag wool, and H2S gas generated during the water quenching process cause serious environmental pollution, which is difficult to control effectively with existing technologies.
A furnace slag treatment system was designed, including a slag pool unit, a cooling water circulation unit, and a slag discharge unit. The system utilizes a closed slag pool, lightweight walls, air ducts, and a wet electrostatic precipitator to create a chimney effect, controlling the cooling of steam in a closed space. Uncooled steam is then treated through cooling water circulation and the wet electrostatic precipitator.
It effectively controlled the leakage of steam in the water-quenched slag pool, reduced environmental pollution, and achieved efficient slag treatment and resource recovery.
Smart Images
Figure CN224215844U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of melting furnaces, specifically to a furnace slag treatment system. Background Technology
[0002] Melting in a furnace is a major method for the resource-based recycling and treatment of solid waste. Solid waste is melted at high temperatures in the furnace, where organic matter is burned and decomposed, and heavy metals are melted into the slag. The slag is then collected and further separated and purified.
[0003] Traditional slag treatment involves water quenching in a slag pool. A locomotive pulls the molten slag ladle to the pool, breaks up the surface slag shell, and slowly pours the molten slag into the water. The slag cools rapidly upon contact with the water, forming granular slag. The slag is then removed by crane and placed in a slag heap for dehydration before being loaded onto trucks for transport. While this method is simple, reliable, and consumes little water, it generates large amounts of steam, slag wool, and H2S gas, causing significant environmental pollution. Summary of the Invention
[0004] To address the environmental pollution and impact of steam and slag wool generated during the cold quenching process of slag in existing technologies, this utility model provides a furnace slag treatment system.
[0005] The technical solution adopted by this utility model is as follows:
[0006] A furnace slag treatment system includes a slag pool unit, a cooling water circulation unit, and a slag discharge unit. The slag pool unit includes a water-quenched slag pool and a closed slag pool. The water-quenched slag pool is filled with cooling water. The closed slag pool includes a concrete wall surrounding the top of the water-quenched slag pool, sealing the pool and having an opening at the top. The water-quenched slag pool is located on one side of a melting furnace. A slag discharge chute is located on one side of the melting furnace, passing through the concrete wall on one side of the closed slag pool and guiding water into the water-quenched slag pool. The slag discharge chute is connected to a cooling water circulation system. The top of the closed slag pool... The unit is constructed with a lightweight wall surrounding it. The four sides of the lightweight wall correspond to the enclosed slag pool, and the connection between the lightweight wall and the enclosed slag pool is sealed. A platform plate is installed on the top of the lightweight wall, with a central opening on the platform plate and a vertical air duct installed thereon. A wet electrostatic precipitator is installed on the top of the air duct. The slag removal unit includes a crane and a water-quenched slag temporary storage bin. T-shaped doorways are provided on two opposite sides of the lightweight wall, through which the crane enters and exits. An electric curtain is installed on the outside of the T-shaped doorways. The water-quenched slag temporary storage bin is installed on the outside of the enclosed slag pool by a support frame.
[0007] Furthermore, the cooling water circulation unit includes a cooling tower, a circulating pump, a slag flushing water collection pool, and a circulating pipeline. The cooling tower is connected to a slag discharge chute through the circulating pipeline. The circulating water in the slag discharge chute enters a water-quenched slag pool. The water-quenched slag pool overflows into the slag flushing water collection pool through a drainage ditch. The circulating pump draws water from the slag flushing water collection pool and sends it to the cooling tower for cooling.
[0008] Furthermore, the melting furnace is equipped with two slag discharge chutes, each of which is connected to a circulation pipe.
[0009] Furthermore, the water-quenched slag temporary storage bin includes a discharge port at the bottom and a discharge chute on the side. The output end of the discharge chute is connected to a belt conveyor, and the output end of the belt conveyor is located in the water-quenched slag storage bin.
[0010] Furthermore, the duct is welded from stainless steel plates.
[0011] Furthermore, the lightweight wall is a lightweight brick wall.
[0012] Furthermore, the output end of the circulation pipe is located directly above the slag discharge chute.
[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: By sequentially setting up a closed slag pool, lightweight wall, air duct, etc. directly above the water-quenched slag pool, a chimney effect is formed, which causes the steam generated in the water-quenched slag pool to rise sequentially in the sealed space. During the rising process, the steam that cannot be cooled is finally treated by a wet electrostatic precipitator. This technical solution can completely control the steam generated after the high-temperature slag comes into contact with the cooling water within the internal space of the slag pool, so as not to leak out and pollute the surrounding environment. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Figure 2 This is a schematic diagram of the slag pool structure of this utility model.
[0016] Figure 3 This is a schematic diagram of the cooling water circulation unit.
[0017] Figure 4 This is a schematic diagram of the structure of a water-quenched slag temporary storage bin.
[0018] In the diagram: 1. Water-quenched slag pool; 2. Enclosed slag pool; 3. Lightweight wall; 4. Air duct; 5. Wet electrostatic precipitator; 6. Feed inlet; 7. Slag discharge chute; 8. Cooling tower; 9. Circulating pump; 10. Slag flushing water collection pool; 11. Circulating pipeline; 12. Drainage ditch; 13. Overhead crane; 14. Water-quenched slag temporary storage bin; 141. Discharge port; 142. Discharge chute; 15. Electric roller shutter; 16. Belt conveyor; 17. Water-quenched slag storage warehouse. Detailed Implementation
[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:
[0020] like Figure 1 As shown, a furnace slag treatment system comprises three parts: a slag pool unit, a cooling water circulation unit, and a slag discharge unit. It is used to cool the molten slag in the furnace to form granular water slag, and to recycle the water slag.
[0021] The slag pool unit consists of a sealed vertical channel formed from bottom to top: a water-quenched slag pool 1, a closed slag pool 2, a lightweight wall 3, an air duct 4, and a wet electrostatic precipitator 5. The treated steam is discharged from the wet electrostatic precipitator 5. The water-quenched slag pool 1 is generally 2m deep, with part of it located below ground level, and is filled with cooling water. The closed slag pool 2 is located above the water-quenched slag pool 1 and consists of a ring of concrete walls around the top of the water-quenched slag pool 1. It is mainly used to prevent water vapor leakage and is generally over 10m high, creating a chimney effect to ensure that the water vapor has sufficient space to cool and rise. The closed slag pool 2 has a feed inlet 6 on its side. Two slag discharge chutes 7 at the outlet of the melting furnace feed molten slag into the water-quenched slag pool 1 for cooling through the feed inlet 6.
[0022] The lightweight wall 3 is located above the enclosed slag pool 2, with its four sides corresponding to the enclosed slag pool 2. The lightweight wall 3 is a lightweight brick wall, and its connection surface with the enclosed slag pool 2 is sealed. A platform plate 7 is installed on the top of the lightweight wall 3. The platform plate 7 has a central opening and a vertical air duct 4 is installed thereon. The air duct 4 is welded from stainless steel plate. A wet electrostatic precipitator 5 is installed on the top of the air duct 4.
[0023] The cooling water circulation unit is used to replenish water to the water-quenched slag pool, simultaneously cool the waste slag discharged from the melting furnace, and fill the water-quenched slag pool with waste slag. The cooling water circulation unit includes a cooling tower 8, a circulation pump 9, a slag flushing water collection pool 10, and a circulation pipe 11. The cooling water in the cooling tower 8 flows through the circulation pipe 11 from the slag discharge chute 7 to the water-quenched slag pool 1. The circulating water in the slag discharge chute 7 enters the water-quenched slag pool 1 for replenishment and cooling. The water in the water-quenched slag pool 1 continuously overflows into the slag flushing water collection pool 10 through the ground drainage ditch 12. The circulation pump 9 draws water from the slag flushing water collection pool 10 and sends it to the cooling tower 8 for cooling, thus achieving circulation.
[0024] The slag removal unit consists of a crane 13 and a water-quenched slag temporary storage bin 14. When the amount of water-quenched slag in the water-quenched slag pool 1 reaches a certain level, it needs to be cleaned in a timely manner to avoid insufficient processing space in the pool. A crane 13 is installed at the lightweight wall. The track of the crane 13 passes through the lightweight wall 3, which has a T-shaped doorway. When slag needs to be lifted, the crane 13 enters and exits through the T-shaped doorway to lift the water-quenched slag from the slag pool and send it to the water-quenched slag temporary storage bin 14. When slag cleaning is not required, an electric roller shutter 15 is installed at the T-shaped doorway to achieve closure.
[0025] The water-quenched slag temporary storage bin 14 is installed on the outside of the enclosed slag pool 2 by a support frame, and its bottom has a passage for vehicles to pass through. The bottom of the water-quenched slag temporary storage bin 14 is provided with a discharge port 141, which is equipped with a hydraulic valve that can be remotely controlled to open and discharge the water slag onto the transport vehicle. A discharge chute 142 is provided on the side of the water-quenched slag temporary storage bin 14, and the output end of the discharge chute 142 is connected to a belt conveyor 16, which transports the water slag to the water-quenched slag storage warehouse 17.
Claims
1. A furnace slag treatment system, comprising a slag pool unit, a cooling water circulation unit, and a slag discharge unit, characterized in that, The slag pool unit includes a water-quenched slag pool and a closed slag pool. The water-quenched slag pool is filled with cooling water. The closed slag pool includes a concrete wall surrounding the top of the water-quenched slag pool, sealing it and leaving an opening at the top. The water-quenched slag pool is located on one side of the melting furnace. A slag chute is located on one side of the melting furnace, passing through the concrete wall on one side of the closed slag pool and guiding the slag into the water-quenched slag pool. The slag chute is connected to a cooling water circulation system. A lightweight wall is built around the top of the closed slag pool. The four sides of the lightweight wall correspond to the enclosed slag pool, and the connection between the lightweight wall and the enclosed slag pool is sealed. A platform plate is installed on the top of the lightweight wall, with a central opening on the platform plate and a vertical air duct installed thereon. A wet electrostatic precipitator is installed on the top of the air duct. The slag discharge unit includes a crane and a water-quenched slag temporary storage bin. T-shaped doorways are provided on two opposite sides of the lightweight wall, through which the crane enters and exits. An electric curtain is installed on the outside of the T-shaped doorway. The water-quenched slag temporary storage bin is installed on the outside of the enclosed slag pool by a support frame.
2. The furnace slag treatment system according to claim 1, characterized in that, The cooling water circulation unit includes a cooling tower, a circulating pump, a slag flushing water collection tank, and a circulating pipeline. The cooling tower is connected to a slag discharge chute through the circulating pipeline. The circulating water in the slag discharge chute enters a water-quenched slag tank. The water-quenched slag tank overflows into the slag flushing water collection tank through a drainage ditch. The circulating pump draws water from the slag flushing water collection tank and sends it to the cooling tower for cooling.
3. The furnace slag treatment system according to claim 2, characterized in that, The melting furnace is equipped with two slag discharge chutes, each of which is connected to a circulation pipe.
4. The furnace slag treatment system according to claim 1, characterized in that, The water-quenched slag temporary storage bin includes a discharge port at the bottom and a discharge chute on the side. The output end of the discharge chute is connected to a belt conveyor, and the output end of the belt conveyor is located in the water-quenched slag storage bin.
5. A furnace slag treatment system according to claim 1, characterized in that, The air duct is welded from stainless steel plates.
6. A furnace slag treatment system according to claim 1, characterized in that, The lightweight wall is a lightweight brick wall.
7. A furnace slag treatment system according to claim 2, characterized in that, The output end of the circulation pipe is located directly above the slag discharge chute.