Circulating water cooling system for cooling purified ash incineration slag
By introducing an air-cooling mechanism into the circulating water cooling system to exchange heat with the water in the circulating water tank, the problem of excessively high circulating water temperature is solved, achieving a more efficient cooling effect and system stability for the slag cooler.
Patent Information
- Application Number
- CN202520121797.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-20
AI Technical Summary
The existing circulating water cooling system has limited cooling effect on the slag cooler, resulting in excessively high circulating water temperature, which easily leads to scale formation and pipe blockage, posing an explosion hazard and making maintenance difficult.
An air-cooling mechanism is introduced into the circulating water cooling system. Heat is exchanged between the air-cooled pipes and the water in the circulating water tank. Combined with the spray cooling method of the cooling tower, air cooling is achieved by using a fan to deliver air. The air-cooled pipes are located below the liquid surface in the circulating water tank to avoid direct contact with the water. Aluminum alloy material is used to improve heat exchange efficiency.
It effectively reduces the temperature of circulating water, improves the cooling effect of the slag cooler, reduces scale formation, lowers the risk of explosion, simplifies maintenance, and enhances system stability.
Smart Images
Figure CN223925433U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cooling technology for purified ash incinerator residue, specifically to a circulating water cooling system for cooling purified ash incinerator residue. Background Technology
[0002] Calcium carbide plant purification ash is collected from the furnace gas in the purification section of a closed calcium carbide furnace. It is characterized by high temperature, fine particle size, low specific gravity, high viscosity, poor water solubility, easy dust generation, and spontaneous combustion upon contact with air. The main components contributing to these characteristics are CaO, C, SiO2, Al2O3, Fe2O3, and MgO. As an industrial solid waste from calcium carbide production, purification ash cannot be directly discharged into the environment; therefore, its recycling is crucial. Because it possesses a certain calorific value, it can be used as a raw material for incineration in drying systems. Cooling slag machines are commonly used to lower the temperature of the purification ash incineration residue, allowing for the recovery of waste heat from the purification ash.
[0003] A slag cooler, also known as a slag depressor, mainly consists of a cylinder, slag inlet box, slag outlet box, power transmission device, base frame, and electrical control system. Both the cylinder and the partition frame adopt a water-cooled wall structure, with guide plates welded to the inner wall of the cylinder and the partition frame. The traditional cooling method for slag coolers is to use circulating water. However, due to the high initial temperature of the incinerator slag, the circulating water temperature becomes too high after water cooling, requiring cooling of the entire system's water circuit. Furthermore, when the water temperature is high, impurities in the water deposit to form scale, easily causing blockages in the inlet and outlet pipes. This creates a high-pressure environment inside the pipes, posing an explosion hazard. Moreover, repairs after pipe blockage are difficult and costly.
[0004] To lower the temperature of the circulating water, a cooling tower is typically installed on the circulating water tank. The jacket of the slag cooler is connected to the top of the cooling tower, and the high-temperature water is sprayed through spray nozzles inside the cooling tower. During the spraying process, the water exchanges heat with the air, thus cooling down. While the cooling tower can cool the water to some extent, its cooling effect is limited. The water returning to the circulating water tank after spraying remains at a relatively high temperature. This high circulating water temperature restricts its cooling effect on the slag cooler, a phenomenon that is more pronounced during hot seasons. Utility Model Content
[0005] The purpose of this invention is to provide a circulating water cooling system for cooling purified ash incinerator slag, so as to improve the problem of the limited cooling effect of the circulating water cooling system on the slag cooler.
[0006] This utility model is achieved through the following technical solution:
[0007] A circulating water cooling system for cooling purified ash incinerator residue is applied to a ash cooler, including a circulating water cooling mechanism. The circulating water cooling mechanism includes a circulating water tank, a circulating water pump, and a cooling tower. The cooling tower is located above the circulating water tank. The pump inlet of the circulating water pump is connected to the circulating water tank, and the pump outlet is connected to the jacket of the ash cooler. The jacket of the ash cooler is connected to the cooling tower. The system also includes an air cooling mechanism, which includes a fan, an air supply pipe, and an air cooling pipe. The air cooling pipe is located inside the circulating water tank, and both ends of the air cooling pipe extend upwards. The fan is located on one side of the circulating water tank, and one end of the air cooling pipe is connected to the air outlet of the fan through the air supply pipe.
[0008] Furthermore, a water receiving hopper is provided below the cooling tower, and a drain pipe is connected to the bottom of the water receiving hopper. The drain pipe extends into the circulating water tank below, and an air-cooled sleeve is fitted on the outside of the drain pipe. The lower end of the air-cooled sleeve is closed to the wall of the drain pipe, and the upper end is open and extends to the top of the circulating water tank. The end of the air-cooled pipe away from the fan is connected to the lower part of the outer wall of the air-cooled sleeve.
[0009] Furthermore, the air-cooling pipe, drain pipe, and water receiving basin are all made of aluminum alloy.
[0010] Furthermore, the upper opening of the air-cooled sleeve is close to the water receiving hopper, the lower surface of the bottom wall of the water receiving hopper is inclined, and the drain pipe is connected to the lowest point of the inclination of the lower surface of the bottom wall of the water receiving hopper.
[0011] Furthermore, the lower surface of the bottom wall of the water receiving hopper is provided with multiple heat dissipation protrusions.
[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0013] In this invention, after the fan is started, the fan sends air into the air-cooled pipe through the air supply pipe. Since the air-cooled pipe is below the liquid level in the circulating water tank, the air flowing in the air-cooled pipe can exchange heat with the water in the circulating water tank through the air-cooled pipe. The air in the air-cooled pipe can carry away the heat of the water in the circulating water tank, which is convenient for cooling the water in the circulating water tank. By reducing the water temperature in the circulating water tank, the cooling effect of the circulating water on the slag cooler is increased. Moreover, during the cooling process of the circulating water, since the air flowing in the air-cooled pipe does not come into direct contact with the circulating water, the rate of evaporation and loss of the circulating water will not be accelerated. Attached Figure Description
[0014] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention, form part of this application and do not constitute a limitation thereof.
[0015] In the attached diagram:
[0016] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.
[0017] The attached diagram shows the markings and corresponding component names:
[0018] 1. Slag cooler; 2. Circulating water tank; 3. Circulating water pump; 4. Cooling tower; 5. Fan; 6. Air supply duct; 7. Air-cooled pipe; 8. Water receiving basin; 9. Drain pipe; 10. Air-cooled jacket; 11. Heat dissipation protrusion. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are for explaining the utility model only and are not intended to limit the utility model. It should be noted that this utility model is already in the actual research and development stage.
[0020] Example 1
[0021] A circulating water cooling system for purifying incinerator ash and slag, referring to Figure 1 The device is applied to a slag cooler 1, which includes a circulating water cooling mechanism. The circulating water cooling mechanism includes a circulating water tank 2, a circulating water pump 3, and a cooling tower 4. The cooling tower 4 is located above the circulating water tank 2. The pump inlet of the circulating water pump 3 is connected to the circulating water tank 2, and the pump outlet is connected to the jacket of the slag cooler 1 through a pipeline. The jacket of the slag cooler 1 is connected to the cooling tower 4 through a pipeline. One end of the jacket of the slag cooler 1 is connected to the inlet and outlet water pipelines through a rotary joint. The cooling device also includes an air cooling mechanism, which includes a fan 5, an air supply pipe 6, and an air cooling pipe 7. The air cooling pipe 7 is located inside the circulating water tank 2, and both ends of the air cooling pipe 7 extend upward. The fan 5 is located on one side of the circulating water tank 2, and one end of the air cooling pipe 7 is connected to the air outlet of the fan 5 through the air supply pipe 6. When the circulating water temperature is high, after the blower 5 is started, the blower 5 sends air into the air-cooled pipe 7 through the air supply pipe 6. Since the air-cooled pipe 7 is below the liquid level in the circulating water tank 2, the air flowing in the air-cooled pipe 7 can exchange heat with the water in the circulating water tank 2 through the air-cooled pipe 7. The air in the air-cooled pipe 7 can carry away the heat of the water in the circulating water tank 2, which is convenient for cooling the water in the circulating water tank 2. By reducing the water temperature in the circulating water tank 2, the cooling effect of the circulating water on the slag cooler 1 is increased. Moreover, during the cooling process of the circulating water, since the air flowing in the air-cooled pipe 7 does not come into direct contact with the circulating water, it will not accelerate the evaporation and dissipation of the circulating water.
[0022] As a preferred embodiment, refer to Figure 1A water receiving hopper 8 is installed below the cooling tower 4. A drain pipe 9 is connected to the bottom of the water receiving hopper 8. The drain pipe 9 extends into the circulating water tank 2 below. An air-cooled sleeve 10 is fitted over the drain pipe 9. The lower end of the air-cooled sleeve 10 is sealed to the wall of the drain pipe 9, and the upper end is open and extends to the top of the circulating water tank 2. The end of the air-cooled pipe 7 away from the fan 5 is connected to the lower part of the outer wall of the air-cooled sleeve 10. The fan 5 blows air into the air-cooled sleeve 10 through the air supply pipe 6 and the air-cooled pipe 7. The air inside the air-cooled sleeve 10 flows upward. The circulating water returning from the slag cooler 1 is transported to the top of the cooling tower 4 for spraying. The sprayed circulating water falls into the water receiving hopper 8 and is then discharged downward into the circulating water tank 2 through the drain pipe 9. The sprayed circulating water is cooled by convection heat exchange.
[0023] As a preferred embodiment, refer to Figure 1 The air-cooled pipe 7, the drain pipe 9, and the water receiving hopper 8 are all made of aluminum alloy. The thermal conductivity of aluminum alloy is slightly worse than that of copper, but the thermal conductivity of aluminum alloy is better than that of steel. Using aluminum alloy can improve the heat exchange effect between the air-cooled pipe 7 and the circulating water, and can improve the convective heat exchange effect of the air-cooled sleeve 10 and the drain pipe 9 on the circulating water.
[0024] As a preferred embodiment, refer to Figure 1 The upper opening of the air-cooled jacket 10 is close to the water receiving tank 8. The lower surface of the bottom wall of the water receiving tank 8 is inclined, and the inner bottom wall of the water receiving tank 8 is also inclined. The drain pipe 9 is connected to the lowest point of the inclined lower surface of the bottom wall of the water receiving tank 8. The air-cooled jacket 10 blows air onto the bottom wall of the water receiving tank 8, which facilitates heat dissipation from the bottom wall of the water receiving tank 8. Since the air is blown upwards from the bottom wall of the water receiving tank 8, while the circulating water in the water receiving tank 8 flows downwards, convective heat exchange can also be achieved, which is beneficial to improving the cooling effect on the circulating water.
[0025] As a preferred embodiment, refer to Figure 1 Multiple heat dissipation protrusions 11 are provided on the lower surface of the bottom wall of the water receiving hopper 8, which can increase the surface area of the outer bottom wall of the water receiving hopper 8 and enhance the effect of the air-cooling sleeve 10 in blowing air to dissipate heat from the water receiving hopper 8.
[0026] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A circulating water cooling system for purifying and cooling ash incineration slag, applied to an ash incineration slag cooling system comprising a slag cooler (1), a circulating water cooling mechanism comprising a circulating water tank (2), a circulating water pump (3) and a cooling tower (4), the cooling tower (4) being located above the circulating water tank (2), the pump-in end of the circulating water pump (3) being in communication with the circulating water tank (2) and the pump-out end being in communication with the jacket of the slag cooler (1), the jacket of the slag cooler (1) being in communication with the cooling tower (4), characterized in that: The air cooling mechanism comprises a fan (5), an air supply pipe (6) and an air cooling pipe (7), the air cooling pipe (7) is arranged inside the circulating water tank (2), both ends of the air cooling pipe (7) extend upwards, the fan (5) is arranged on one side of the circulating water tank (2), and one end of the air cooling pipe (7) is communicated with an air outlet of the fan (5) through the air supply pipe (6). 2. A circulating water cooling system for cooling incineration ash according to claim 1, characterized in that: A water collecting basin (8) is arranged below the cooling tower (4), a drain pipe (9) is arranged in communication at the bottom of the water collecting basin (8), the drain pipe (9) extends into the circulating water tank (2) downwards, an air cooling sleeve pipe (10) is arranged outside the drain pipe (9), the lower end of the air cooling sleeve pipe (10) is arranged in closed communication with the pipe wall of the drain pipe (9), and the upper end of the air cooling sleeve pipe (10) is arranged in open communication and extends above the circulating water tank (2), and the end of the air cooling pipe (7) away from the fan (5) is arranged in communication with the lower part of the outer wall of the air cooling sleeve pipe (10).
3. A circulating water cooling system for cooling the incineration ash according to claim 2, characterized in that: The air cooling pipe (7), the drain pipe (9) and the water collecting basin (8) are all made of aluminum alloy.
4. The circulating water cooling system for cooling the incineration ash according to claim 3, wherein: The upper opening of the air cooling sleeve pipe (10) is close to the water collecting basin (8), the lower surface of the bottom wall of the water collecting basin (8) is arranged in an inclined manner, and the drain pipe (9) is in communication with the lowest part of the inclined lower surface of the bottom wall of the water collecting basin (8).
5. A circulating water cooling system for cooling the incineration ash according to claim 4, characterized in that: The lower surface of the bottom wall of the water collecting basin (8) is provided with a plurality of heat dissipation protrusions (11).