Improved water seal slag scraper special for solid waste incineration system

Abstract

The utility model provides an improved water seal slag scraper special for a solid waste incineration system, which is provided with a movable support, universal wheels are arranged at the bottom of the movable support, an inclined closed box is arranged on the movable support, a slag falling port is arranged at the lower part of the closed box, and a slag outlet is arranged at the upper part of the closed box. A conveying belt is installed in the closed box, a driving wheel is installed at the upper end of the conveying belt, a scraper is arranged on the conveying belt, the driving wheel is connected with a driving motor installed outside the closed box through a speed reducer, a water sealing small ball is placed in the slag falling opening, and a water sealing area is arranged at the bottom of the slag falling opening. According to the improved water seal slag scraper special for the solid waste incineration system, the arrangement of the slag falling opening is improved, and the water seal small ball is placed in the slag falling opening, so that the temperature of water in the water seal slag scraper can be effectively reduced, the evaporation capacity of the water in the slag falling opening is reduced, and the slag falling dust raising amount is reduced, and therefore the purposes of reducing energy consumption and saving resources are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing auxiliary tools for solid waste incineration, in particular to an improved water-sealed scraper specially used for a solid waste incineration system. Background Art

[0002] In the solid waste incineration system, a scraper is installed at the bottom of the secondary combustion chamber to remove the solid residue generated in the secondary combustion chamber to prevent the solid residue from accumulating at the bottom of the secondary combustion chamber and causing impact. At present, there are many types of scrapers, which are generally divided into ship type or inclined scraper type. The scraper needs to be closed when docking with the secondary combustion chamber. At present, most of them use water seal to seal the connection between the secondary combustion chamber and the scraper. During the operation of the incineration system, solid waste, waste liquid, waste gas, etc. are incinerated in the rotary kiln and then enter the secondary combustion chamber. The combustibles are burned into flue gas, and the non-combustibles become waste residue and fall from the bottom of the secondary combustion chamber into the scraper and are transported out by the scraper. The solid waste incineration system generally requires an induced draft fan to draw air at the rear end to form a negative pressure to prevent flue gas from overflowing. Therefore, it is particularly important to seal the scraper and the secondary combustion chamber. At the same time, the waste residue falling from the bottom of the secondary combustion chamber may also cause When the steel plate melts, cooling measures are also needed, and a water-sealed scraper can solve this problem well. However, in daily operation, we found that this type of water-sealed scraper has several problems. First, the water seal surface is in contact with the secondary combustion chamber, the water temperature is high, and the evaporation amount is large. Most of the evaporated water vapor enters the secondary combustion chamber, which will cause a high water content in the flue gas, which is not conducive to the back-end flue gas treatment. Second, when the waste slag falls into the scraper, a large amount of water will evaporate to cool the waste slag, and it will also cause dust particles. Third, due to the rapid evaporation of water, a large amount of water needs to be added to the scraper in time to avoid the water level drop and cause positive pressure in the incineration system. For this reason, the applicant has designed and manufactured an improved water-sealed scraper specially designed for solid waste incineration systems based on the actual needs and difficulties of the water-sealed scraper. The improved water-sealed scraper specially designed for solid waste incineration systems can solve the above problems well and achieve the purpose of energy saving and environmental protection. Summary of the invention

[0003] In order to solve the above technical problems, the utility model proposes an improved water-seal scraper specially used for a solid waste incineration system. A water-seal ball with an inner hollow structure of stainless steel or ceramic is placed in the slag outlet, and a water-seal area is set at the bottom of the slag outlet; the water seal surface is not in direct contact with the secondary combustion chamber, the water-seal ball blocks the heat transfer of the secondary combustion chamber, and the fallen slag is allowed to rotate through the water-seal ball into the lower water seal area, which can effectively reduce the temperature of water in the water-seal scraper, reduce the evaporation of water in the slag outlet, and reduce the amount of dust raised by falling slag, thereby achieving the purpose of reducing energy consumption and saving resources.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An improved water-seal scraper specially used for a solid waste incineration system comprises a reducer, a driving motor, a movable bracket, a closed box, a driving wheel, a scraper, a water-seal ball, a water-seal area and a conveyor belt. The movable bracket is provided with a closed box on the upper part, and the closed box is provided with an inclined structure. A slag outlet is provided on the upper part of the closed box, and a slag drop outlet is provided on the lower part of the closed box. A reducer and a driving motor are installed on the outer side of the upper part of the closed box, and the reducer is connected to the rotating shaft of the driving motor; a conveyor belt is installed inside the closed box, and a driving wheel is provided on the upper part of the conveyor belt, and the rotating shaft of the driving wheel passes through the closed box and is connected to the reducer installed on the outer side, and a scraper is provided on the conveyor belt; a water-seal ball is placed in the slag drop outlet, and a water-seal area is provided at the lower part of the slag drop outlet.

[0006] Furthermore, a water-sealed ball is placed in the slag outlet, and the water-sealed ball is a hollow stainless steel ball or a hollow ceramic ball.

[0007] Furthermore, the outer surface of the water-sealing ball is provided with a bumpy structure or is attached with a high-temperature resistant anti-sticking layer.

[0008] Furthermore, universal wheels are installed at the bottom of the movable bracket.

[0009] The benefits of this application are:

[0010] 1. Efficient heat insulation;

[0011] A water-sealing ball with a hollow inner structure of stainless steel or ceramic is placed in the slag-dropping port, and a water-sealing area is set at the bottom of the slag-dropping port; the water-sealing surface is not in direct contact with the secondary combustion chamber, and the water-sealing ball blocks the heat transfer of the secondary combustion chamber, and the fallen slag is rotated through the water-sealing ball into the lower water-sealing area, which can effectively cut off the direct contact between the water surface in the water-sealing area and the secondary combustion chamber, reduce high-temperature transfer, thereby reducing water temperature, avoiding the generation of a large amount of steam, and forming an efficient heat insulation barrier;

[0012] 2. Improve the efficiency of solid waste combustion systems;

[0013] Because the evaporation of water is reduced, the water content in the flue gas is reduced, and the efficiency of the flue gas entering the subsequent boiler, dry deacidification tower, quenching tower and other equipment will be improved, thereby improving the economic benefits of the system; for example, it will reduce the adsorption of particulate matter, avoid flue blockage, and delay the corrosion of flue and equipment; reduce the partial salt content in the flue gas, further delaying the corrosion of flue and equipment; in the dry deacidification tower, the amount of lime and activated carbon sprayed can be reduced; in the quenching tower, the flue gas needs to be cooled to about 200°C, which can reduce the amount of water required for cooling.

[0014] 3. Energy saving and environmental protection;

[0015] After the water seal surface is cut off from direct contact with the secondary combustion chamber, the water seal temperature can be effectively lowered, the water consumption can be reduced, and the dust caused by the high-temperature vaporization generated by the instantaneous contact between the high-temperature slag and the water body can be avoided, thereby achieving the purpose of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the local structure of the utility model.

[0018] The markings in the figure are: 1. reducer; 2. drive motor; 3. slag outlet; 4. universal wheel; 5. movable bracket; 6. slag outlet; 7. closing box; 8. driving wheel; 9. scraper; 10. water seal ball; 11. water seal area; 12. conveyor belt. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0020] like Figure 1-2 As shown, an improved water-sealed scraper specially used for a solid waste incineration system is shown, which includes a reducer 1, a driving motor 2, a slag outlet 3, a universal wheel 4, a movable bracket 5, a slag outlet 6, a sealing box 7, a driving wheel 8, a scraper 9, a water-sealed ball 10, a water-sealed area 11 and a conveyor belt 12, as shown in FIG. Figure 1 As shown, the improved water-sealed scraper specially used for the solid waste incineration system is provided with a movable bracket 5. The movable bracket 5 is a frame structure made by welding steel sections. The movable bracket 5 is a structure with one side higher than the other side. A universal wheel 4 is installed at the bottom of the movable bracket 5. The universal wheel 4 is provided with a self-locking structure. When the self-locking structure is opened, it can move freely. When the self-locking structure is closed, it has a good fixing effect. A closed box 7 is installed on the upper part of the movable bracket 5. The closed box is made by welding steel plates and has good sealing and anti-leakage properties. The closed box 7 shown is arranged as an inclined structure, a slag outlet 6 is arranged at the upper part of the closed box 7, and the slag outlet 6 is arranged as a pipe at one end inclined downward, which can facilitate the free falling of slag and form a closed area to prevent slag from raising dust. A slag outlet 3 is arranged at the lower part of the closed box 7, and the slag outlet 3 is a funnel-shaped structure, and a connecting hole is arranged at the upper part, which can be quickly connected and closed with the bottom of the secondary combustion chamber. A reducer 1 and a drive motor 2 are installed on the outer side of the upper part of the closed box 7, and the reducer 1 is connected to the rotating shaft of the drive motor 2, and the drive motor 2 provides power for the water-sealed scraper; Figure 2As shown, a conveyor belt 12 is installed inside the closed box 7, and the conveyor belt 12 is resistant to high temperature corrosion. A driving wheel 8 is arranged on the upper part of the conveyor belt 12, and the driving wheel 8 drives the conveyor belt 12 to rotate. The rotating shaft of the driving wheel 8 passes through the closed box 7 and is connected to the reducer 1 installed on the outside. The rotating shaft of the driving motor 2 provides a rotating force with a suitable speed to the driving wheel 8 through the reducer 1 to realize the rotation of the conveyor belt 12. A scraper 9 is arranged on the conveyor belt 12, and the scraper 9 transmits the slag that falls into the water seal area; a A water-sealed ball 10 is a hollow stainless steel ball or a hollow ceramic ball. The outer surface of the water-sealed ball 10 is provided with an uneven structure or is attached with a high-temperature resistant anti-sticking layer. The uneven structure or the high-temperature resistant anti-sticking layer is used to fix the solid residue produced by the combustion of materials in the secondary combustion chamber. A water-sealed area 11 is provided at the lower part of the slag outlet 3. The water-sealed area 11 forms a sealing effect on the scraper and the secondary combustion chamber to avoid positive pressure in the secondary combustion chamber. At the same time, the fallen residue is cooled to avoid damage to the scraper components by high-temperature residue.

[0021] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. An improved water-sealed scraper for a solid waste incineration system, comprising a reducer (1), a drive motor (2), a movable bracket (5), a sealing box (7), a driving wheel (8), a scraper (9), a water-sealed ball (10), a water-sealed area (11) and a conveyor belt (12), characterized in that: A closed box (7) is installed on the upper part of the movable bracket (5), the closed box (7) is arranged in an inclined structure, a slag outlet (6) is arranged on the upper part of the closed box (7), a slag outlet (3) is arranged on the lower part of the closed box (7), a reducer (1) and a drive motor (2) are installed on the outer side of the upper part of the closed box (7), and the reducer (1) is connected to the rotating shaft of the drive motor (2); a conveyor belt (12) is installed inside the closed box (7), a driving wheel (8) is arranged on the upper part of the conveyor belt (12), the rotating shaft of the driving wheel (8) passes through the closed box (7) and is connected to the reducer (1) installed on the outer side, and a scraper (9) is arranged on the conveyor belt (12); a water seal ball (10) is placed in the slag outlet (3), and a water seal area (11) is arranged at the lower part of the slag outlet (3).

2. The improved water-sealed scraper for solid waste incineration system according to claim 1 is characterized in that: A water-sealing ball (10) is placed in the slag drop opening (3), and the water-sealing ball (10) is a hollow stainless steel ball or a hollow ceramic ball.

3. The improved water-sealed scraper for solid waste incineration system according to claim 2 is characterized by: The outer surface of the water-sealing ball (10) is provided with a concave-convex structure or is attached with a high-temperature resistant anti-sticking layer.

4. The improved water-sealed scraper for solid waste incineration system according to claim 1 is characterized by: Universal wheels (4) are installed at the bottom of the mobile bracket (5).

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