Efficient dry slagging cooling structure

Abstract

The application belongs to the technical field of hazardous waste incineration treatment, and particularly discloses a high-efficiency dry-method slag discharging and cooling structure, which comprises a main driving shaft, a main driving component, a transmission component, a driven shaft, a driven component, a group of bearings, a group of end covers, an upper shell assembly, a lower shell assembly, a rotor body assembly and the like.The application has the beneficial effects that: the wind cooling mode is used to replace the traditional water cooling to cool the hazardous waste incineration high-temperature ash slag, the ash slag after the traditional water cooling and slag removal has a water content of more than 40%, and the new dry-method slag removal mode is to dry the ash slag after the incineration and the wind cooling, thereby saving the water resource, avoiding the generation of a large amount of contaminated water, reducing the storage, transportation and disposal costs of the secondary waste, reducing the subsequent treatment and transportation costs of the contaminated water, greatly reducing the environmental pollution caused by the wet-method slag removal process, realizing heat recovery, replacing part of the fuel of the second combustion chamber, thereby reducing the fuel usage, and having significant economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of hazardous waste incineration treatment application technology, specifically relating to a high-efficiency dry slag discharge and cooling structure. Background Technology

[0002] With the rapid development of global industrialization and urban economies, the amount of hazardous waste generated has increased dramatically, posing serious threats to human health, soil, and water. Therefore, hazardous waste treatment technology is a pressing issue that needs to be addressed. Improper hazardous waste treatment processes not only result in poor effectiveness but also easily cause severe secondary pollution.

[0003] Hazardous waste treatment refers to the process of decomposing harmful substances in hazardous waste into harmless components or converting them into less toxic chemical forms through one or more physical and chemical means. The basic principles of hazardous waste pollution prevention and control technology policies are the reduction, resource recovery, and harmlessness of hazardous waste.

[0004] Incineration is one of the most effective ways to treat hazardous waste, offering the fastest way to reduce its volume while also achieving harmlessness and energy recovery. Currently, hazardous waste disposal commonly employs rotary kiln pyrolysis and two-stage combustion chamber incineration. In this system, the high-temperature ash from the secondary combustion chamber is typically cooled by water before being removed from the water. Because the heat from the ash cannot be effectively recovered, significant heat energy is lost. Furthermore, this method consumes a large amount of water, resulting in high moisture content in the cooled ash, which easily pollutes the environment during temporary storage and transportation. Moreover, the heavy metals and other harmful substances in the ash are easily soluble in water, increasing the cost and complexity of subsequent treatment processes and causing substantial environmental pollution.

[0005] Currently, the hazardous waste treatment industry urgently needs to improve and innovate cooling equipment and technology for high-temperature ash slag in order to reduce the amount of cooled ash slag landfill, reduce wastewater volume and subsequent treatment costs, and greatly reduce the environmental pollution caused by wet slag removal processes.

[0006] Therefore, based on the above problems, the present invention provides a high-efficiency dry slag discharge cooling structure. Summary of the Invention

[0007] Purpose of the invention: The purpose of this invention is to provide a high-efficiency dry slag removal and cooling structure to solve the problems existing in the prior art of hazardous waste treatment, namely, to solve the problems of water waste, high treatment cost, large footprint and environmental pollution of traditional water seal slag removal machines, and to enable efficient utilization of hazardous waste incineration ash.

[0008] Technical Solution: This invention provides a high-efficiency dry slag discharge cooling structure, comprising a main drive shaft, a main drive component, a transmission component, a driven shaft, a driven component, a set of bearings, a set of end covers, an upper housing assembly, a lower housing assembly, and a rotor assembly; the set of bearing seats are respectively disposed within the symmetrical center line end faces of the upper housing assembly and the lower housing assembly, the set of bearings are respectively disposed within the bearing seats, the set of end covers are respectively disposed on the bearing seats, the two ends of the driven shaft are respectively connected to the bearings, the driven component is mounted on one end of the driven shaft, the rotor assembly is mounted on the driven shaft and located within the cavity formed by the upper housing assembly and the lower housing assembly, the main drive component is mounted on the main drive shaft and connected to the driven component through the transmission component; wherein, the driven shaft drives the rotor assembly to rotate.

[0009] In this technical solution, the upper shell assembly includes a feed inlet, an exhaust gas outlet, a discharge outlet, a scraper, and an upper body. The feed inlet and exhaust gas outlet are located on the top of the upper body. The feed inlet is connected to the slag discharge port below the secondary combustion chamber. The high-temperature ash and slag after combustion fall into the upper body through the feed inlet. The exhaust gas outlet is located near the top of the discharge outlet. Medium and low temperature exhaust gas is discharged from the exhaust gas outlet for further treatment. The temperature and volume of the air entering the secondary combustion chamber can be controlled and adjusted. The scraper is installed at the discharge outlet.

[0010] In this technical solution, the lower housing assembly includes an air inlet and a lower body; wherein, a plurality of air inlets are distributed on the outer side of the lower body, and cooling air enters the lower housing through the air inlets.

[0011] In this technical solution, the rotor assembly includes a bushing, a scraper, and a grate. The bushing is mounted on the driven shaft, and the grate is mounted on the bottom of the bushing and rotates synchronously with it. The scraper is mounted vertically on the bushing and at a 90° angle to the grate. The bottom of the rotor assembly and the lower housing assembly form a cold air chamber. Cooling air passes through the grate and exchanges heat with the high-temperature ash and slag falling on the grate. The high-temperature ash and slag are slowly cooled, and the hot air after heat exchange enters the secondary combustion chamber from the feed inlet. At the same time, as the bushing and the grate rotate, the ash and slag also rotate slowly synchronously with the grate. During the slow movement, the ash and slag are continuously cooled by the cooling air. At this time, a discharge port is provided on the side of the upper body, and a scraper is installed at the discharge port. The cooled ash and slag are pushed to the discharge port by the scraper and discharged from the discharge port.

[0012] The high-efficiency dry slag discharge cooling structure of this technical solution also includes an inner sealing ring provided on the connecting surface of the bushing and the grate plate, and an outer sealing ring provided on the connecting surface of the grate plate and the upper body; wherein, the outer sealing ring and the inner sealing ring ensure that the ash and slag will not leak into the lower air chamber, and at the same time, the cooling air will not directly enter the interior of the upper shell assembly without passing through the ash and slag.

[0013] In this technical solution, the outer sealing ring and the inner sealing ring are respectively configured as a circular structure and a semi-circular structure; wherein, the outer sealing ring and the inner sealing ring are made of stainless steel or nitrile rubber, among other things.

[0014] In this technical solution, a set of inlets are provided; wherein, each inlet is configured as a rectangular structure.

[0015] In this technical solution, the scraper includes, but is not limited to, an arc-shaped structure.

[0016] Compared with existing technologies, the beneficial effects of the efficient dry slag removal and cooling structure of the present invention are as follows: 1. The present invention uses air cooling instead of traditional water cooling to cool the high-temperature ash residue from hazardous waste incineration. The ash residue after traditional water cooling has a moisture content of over 40%, while the new dry slag removal method uses air cooling to make the incinerated ash residue dry, saving water resources, avoiding the generation of large amounts of polluted water, reducing the storage, transportation and disposal costs of secondary waste, and reducing the cost of subsequent treatment and transportation of polluted water, thus greatly reducing the environmental pollution caused by wet slag removal processes; 2. The bottom of the grate plate and the lower shell of the dry slag removal and cooling device form a cold air chamber. Cooling air is blown into the cooling device through the cold air chamber and exchanges heat with the high-temperature ash residue falling on the grate plate. The cooling air rises to a high-temperature gas and enters the secondary combustion chamber from the top interface of the ash residue cooling device, thereby realizing heat recovery and replacing part of the fuel in the secondary combustion chamber, thus reducing the amount of fuel used and having significant economic benefits. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main structure of a high-efficiency dry slag discharge and cooling structure according to the present invention; Figure 2 This is a top view of the upper shell assembly of a high-efficiency dry slag discharge and cooling structure according to the present invention. Figure 3 This is a top view of the lower shell assembly of a high-efficiency dry slag discharge and cooling structure according to the present invention. The following numbers are used in the diagram: 1-Driven component, 2-Driven shaft, 3-Bearing, 4-End cover, 5-Upper housing assembly, 6-Lower housing assembly, 7-Rotor body assembly, 8-Bearing seat, 9-Outer sealing ring, 10-Shaft sleeve, 11-Main drive shaft, 12-Main drive component, 13-Transmission component, 14-Inner sealing ring, 51-Inlet, 52-Exhaust gas outlet, 53-Outlet, 54-Scraper, 55-Upper body, 61-Air inlet, 63-Lower body, 74-Grate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "top," "bottom," "one side," "the other side," "front," "back," "middle part," "inner," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. Example 1

[0022] like Figure 1 , Figure 2 and Figure 3 The high-efficiency dry slag discharge cooling structure shown includes a main drive shaft 11, a main drive component 12, a transmission component 13, a driven shaft 2, a driven component 1, a set of bearings 3, a set of end covers 4, an upper housing assembly 5, a lower housing assembly 6, and a rotor body assembly 7. A set of bearing housings 8 are respectively installed in the end faces of the symmetrical center line of the upper housing assembly 5 and the lower housing assembly 6. A set of bearings 3 are respectively installed in bearing housings 8. A set of end caps 4 are respectively installed on the bearing housing 8. The driven shaft 2 is connected to bearings 3 at both ends. Driven component 1 is installed at one end of driven shaft 2. The rotor body 7 is mounted on the driven shaft 2 and is located within the cavity formed by the upper housing assembly 5 and the lower housing assembly 6. The main drive component 12 is mounted on the main drive shaft 11 and is connected to the driven component 1 via the transmission component 13; Among them, the driven shaft 2 is linked to the rotation of the rotor body assembly 7.

[0023] In addition, the preferred upper housing assembly 5 includes a feed inlet 51, an exhaust outlet 52, a discharge outlet 53, a scraper 54, and an upper body 55; The upper body 55 is equipped with a feed inlet 51 and an exhaust gas outlet 52 at its top. The feed inlet 51 is connected to the slag discharge port below the secondary combustion chamber. The high-temperature ash and slag after combustion fall into the upper body 55 through the feed inlet 51. The exhaust gas outlet 52 is close to the top of the discharge port 53. The medium and low temperature exhaust gas is discharged from the exhaust gas outlet 52 for post-treatment. The temperature and volume of the air entering the secondary combustion chamber can be controlled and adjusted. The scraper 54 is installed at the discharge port 53.

[0024] Additionally, the preferred lower housing assembly 6 includes an air inlet 61 and a lower body 62; The lower body 62 has several air inlets 61 distributed on its outer side, through which cooling air enters the lower body 62.

[0025] Additionally, the preferred rotor assembly 7 includes a bushing 10, a scraper 54, and a grate 71; The bushing 10 is mounted on the driven shaft 2, and the grate 71 is mounted on the bottom of the bushing 10 and rotates synchronously with the bushing 10. The scraper 54 is mounted vertically on the bushing 10 and is at a 90° angle to the grate 71. The bottom of the rotor assembly 7 and the lower housing assembly 6 form a cold air chamber. The cooling air passes through the grate 74 and exchanges heat with the high-temperature ash slag falling on the grate 71. The high-temperature ash slag is slowly cooled, and the hot air after heat exchange enters the secondary combustion chamber from the feed port 51. At the same time, as the bushing 10 and the grate 71 rotate, the ash slag also rotates slowly synchronously with the grate 71. During the slow movement, the ash slag is continuously cooled by the cooling air. At this time, the upper body 55 is provided with a discharge port 53 on the side. A scraper 54 is installed at the discharge port 53. The cooled ash slag is pushed to the discharge port 53 by the scraper 54 and discharged from the discharge port 53. Example 2

[0026] Based on Embodiment 1, the high-efficiency dry slag discharge cooling structure also includes an inner sealing ring 14 disposed on the connecting surface of the bushing 10 and the grate plate 71, and an outer sealing ring 9 disposed on the connecting surface of the grate plate 71 and the upper body 55. The outer sealing ring 9 and the inner sealing ring 14 ensure that ash and slag will not leak into the lower air chamber, and at the same time, the cooling air will not enter the upper housing assembly 5 directly without passing through the ash and slag.

[0027] In addition, the preferred outer sealing ring 9 and inner sealing ring 14 are respectively set as circular structure and semi-circular structure, so as to realize convenient assembly and complete sealing between bushing 10, grate plate 71, grate plate 71 and upper body 55; wherein, the outer sealing ring 9 and inner sealing ring 14 are made of stainless steel or nitrile rubber, which have good chemical properties and long service life.

[0028] In addition, a set of feed inlets 51 are preferably provided; wherein each feed inlet 51 is configured as a rectangular structure to achieve rapid feeding of high-temperature ash and slag.

[0029] In addition, the preferred scraper 54 includes, but is not limited to, an arc-shaped structure, which cooperates with the discharge port 53 to achieve rapid and unblocked discharge, while the rotation direction of the grate 71 is opposite to the arc-shaped top surface of the arc-shaped scraper 54.

[0030] In addition, the upper body 55 and the lower body 62 can be connected by a flange to form a modular design, which facilitates the installation and maintenance of the equipment.

[0031] In this invention, the main drive component 12 and the driven component 1 include, but are not limited to, pulleys and sprockets; the transmission component 13 includes, but is not limited to, belts and transmission chains; and the grate plate 71 includes, but is not limited to, circular mesh structures and polygonal mesh structures.

[0032] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-efficiency dry slag discharge cooling structure, characterized in that: The assembly includes a main drive shaft (11), a main drive component (12), a transmission component (13), a driven shaft (2), a driven component (1), a set of bearings (3), a set of end caps (4), an upper housing assembly (5), a lower housing assembly (6), a rotor body assembly (7), and a set of bearing seats (8). The set of bearing seats (8) are respectively disposed within the symmetrical center line end faces of the upper housing assembly (5) and the lower housing assembly (6). The set of bearings (3) are respectively disposed within the bearing seats (8). The set of end caps (4) are respectively disposed on the bearing seats (8). The two ends of the driven shaft (2) are respectively connected to the bearings (3). The driven component (1) is installed at one end of the driven shaft (2). The rotor body assembly (7) is installed on the driven shaft (2). The upper housing assembly (5) is located within the cavity formed by the upper housing assembly (5) and the lower housing assembly (6). The main drive component (12) is mounted on the main drive shaft (11) and connected to the driven component (1) via the transmission component (13). The driven shaft (2) rotates in conjunction with the rotor assembly (7). The upper housing assembly (5) includes a feed inlet (51), an exhaust gas outlet (52), a discharge outlet (53), a scraper (54), and an upper body (55). The upper body (55) has a feed inlet (51) and an exhaust gas outlet (52) at its top. The feed inlet (51) is connected to the slag discharge port below the secondary combustion chamber. The high-temperature ash slag after combustion falls into the upper body (55) through the feed inlet (51). The exhaust gas outlet (52) is located near the discharge outlet. At the top of the outlet (53), the low-temperature exhaust gas is discharged from the exhaust outlet (52) for post-treatment. The temperature and volume of the air entering the secondary combustion chamber can be controlled and adjusted. The scraper (54) is installed at the discharge outlet (53). The lower housing assembly (6) includes an air inlet (61) and a lower body (62). Several air inlets (61) are distributed on the outside of the lower body (62). Cooling air enters the upper body (55) through the air inlets (61). The rotor assembly (7) includes a bushing (10), a scraper (54), and a grate (71). The bushing (10) is installed on the driven shaft (2). The grate (71) is installed on the bottom of the bushing (10) and rotates synchronously with the bushing (10). The scraper (54) is installed vertically on the bushing. (10) is at 90° with the grate (71). The bottom of the rotor assembly (7) and the lower housing assembly (6) form a cold air chamber. The cooling air passes through the grate (71) and exchanges heat with the high-temperature ash on the grate (71). The high-temperature ash is slowly cooled, and the hot air after heat exchange enters the secondary combustion chamber from the feed port (51). At the same time, as the bushing (10) and the grate (71) rotate, the ash also rotates slowly in sync with the grate (71). During the slow movement, the ash is continuously cooled by the cooling air. At this time, the discharge port (53) is set on the side of the upper body (55). A scraper (54) is installed at the discharge port (53). The cooled ash is pushed to the discharge port (53) by the scraper (54) and discharged from the discharge port (53).It also includes an inner sealing ring (14) disposed on the connecting surface of the bushing (10) and the grate plate (71), and an outer sealing ring (9) disposed on the connecting surface of the grate plate (71) and the upper body (55). The outer sealing ring (9) and the inner sealing ring (14) ensure that ash and slag do not leak into the lower air chamber, and that the cooling air does not directly enter the interior of the upper housing assembly (5) without passing through the ash and slag.

2. The high-efficiency dry slag discharge cooling structure according to claim 1, characterized in that: The outer sealing ring (9) and the inner sealing ring (14) are respectively configured as a circular structure and a semi-circular structure; The outer sealing ring (9) and the inner sealing ring (14) are made of stainless steel or nitrile rubber.

3. The high-efficiency dry slag discharge cooling structure according to claim 1, characterized in that: One set of inlet ports (51) is provided; The feed inlet (51) is set as a rectangular structure.

4. The high-efficiency dry slag discharge cooling structure according to claim 1, characterized in that: The scraper (54) has an arc-shaped structure.

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