Scraper type ash removal device of hazardous waste heat boiler
The scraper-type ash removal device addresses the issue of fine ash adhesion in waste heat boilers by using a reciprocating scraper system made of high-temperature resistant materials, effectively removing ash and reducing maintenance and labor costs.
Patent Information
- Application Number
- CN202420871182.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-25
AI Technical Summary
Traditional methods for removing fine ash from waste heat boilers in hazardous waste incineration facilities cause damage to refractory materials and increase maintenance and labor costs due to adhesion of fine ash to the inner walls, reducing heat exchange efficiency.
A scraper-type ash removal device with a cleaning scraper, scraper track, connecting rod, and push plate handle, which allows for reciprocating motion to dislodge adhered ash without damaging the inner wall, using high-temperature resistant materials like 2205 stainless steel and low thermal conductivity materials for the handle.
Effectively removes over 95% of fine ash, reducing labor and maintenance costs while maintaining heat exchange efficiency by preventing ash adhesion and eliminating the need for manual hammering or mechanical vibration.
Smart Images
Figure CN222164831U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of furnace ash treatment, and in particular relates to a scraper-type ash removal device for a hazardous waste waste heat boiler. Background Art
[0002] Waste heat boiler is an energy conversion device. The waste heat boiler used in hazardous waste incineration facilities is a boiler that uses the heat of high-temperature exhaust gas generated during the incineration of hazardous waste to generate steam. After the hazardous waste is incinerated at high temperature, the exhaust gas contains a large amount of accumulated fine ash. When these fine ashes pass through the waste heat boiler, they will fall and settle in the ash unloading chamber at the bottom of the waste heat boiler due to the influence of gravity.
[0003] The traditional ash discharge valve is designed at the bottom of the ash discharge chamber, and the fine ash falls into the ash discharge valve due to gravity. However, in the actual operation process, some fine ash is fine and has strong adsorption, and will adhere to the inner wall of the ash discharge chamber. As time goes by, the fine ash will accumulate more and more, resulting in a reduction in the cross-sectional area of gas flow in the waste heat boiler and a decrease in heat exchange efficiency. In order to solve the problem of adhesion of this part of fine ash with strong adsorption, manual hammering or mechanical vibration is currently used, but these two methods are not ideal for solving the problem of adhesion of fine ash. Not only will it cause damage to the refractory materials inside the ash discharge chamber, but it will also increase the cost of maintenance and maintenance of equipment. Finally, it is necessary to increase manpower and material resources to clean this part of fine ash, which increases the operating cost of the waste heat boiler. Utility Model Content
[0004] The purpose of the utility model is to solve the above-mentioned shortcomings existing in the prior art and to provide a scraper-type ash removal device for a hazardous waste waste heat boiler.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A scraper-type ash removal device for a hazardous waste waste heat boiler comprises a cleaning scraper, a scraper track, a connecting rod, a limit block and a push plate handle arranged in the ash unloading chamber of the waste heat boiler; the cleaning scraper is installed on the scraper track, the scraper track is embedded in the inner side of the ash unloading chamber wall, and the limit blocks are installed at both ends of the scraper track; a strip-shaped long opening through which the connecting rod can pass is opened on the ash unloading chamber wall, and after the connecting rod passes through the strip-shaped long opening, one end of the connecting rod is connected to the push plate handle by a screw, and the other end is connected to the cleaning scraper by a screw, and the push plate handle drives the connecting rod, and then drives the cleaning scraper to reciprocate along the strip-shaped long opening on the scraper track, thereby completing the ash removal of the inner wall of the ash unloading chamber.
[0007] Preferably, the scraping surface of the cleaning scraper (the cleaning scraper is a rectangular plate, and its surface facing the inner wall of the ash unloading chamber is defined as the scraping surface) is arranged parallel to the inner wall of the ash unloading chamber, and there is a certain distance (about 1 cm) between the scraper and the refractory material of the inner wall of the ash unloading chamber to ensure that there is no collision with the inner wall of the ash unloading chamber during movement. The cleaning scraper, connecting rod, and limit block should be made of high temperature resistant and wear-resistant materials, including but not limited to 2205 stainless steel.
[0008] Preferably, the scraper track should be made of high temperature resistant and wear-resistant material, and the track is equipped with two track sliders, and the cleaning scraper is connected to the scraper track through the track sliders. The scraper track includes but is not limited to 2205 stainless steel.
[0009] Preferably, the ash unloading chamber is a high-temperature area. To ensure that the operator does not get burned during operation, the push plate handle should be made of a material with low thermal conductivity, including but not limited to wood.
[0010] Preferably, there are two scraper rails and two limit blocks; the limit blocks are fixed on both sides of the scraper rails to limit the reciprocating area of the cleaning scraper.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] 1. In the utility model, the cleaning scraper performs reciprocating motion in the ash unloading chamber, so that the fine ash adhered to the inner wall of the ash unloading chamber can easily fall into the ash unloading valve, thus solving the problem that the fine ash with strong adsorption will adhere to the inner wall of the ash unloading chamber, and saving labor costs;
[0013] 2. In the utility model, the scraping surface of the cleaning scraper remains parallel to the inner wall of the ash unloading chamber during operation, and will not cause damage to the refractory materials in the ash unloading chamber during movement, saving the cost of equipment maintenance and maintenance, and can replace manual hammering and mechanical vibration methods.
[0014] In summary, the utility model can remove fine ash adhering to the inner wall of the ash unloading chamber, thereby reducing labor costs and maintenance costs while increasing production time. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a front view structural diagram of the device of the utility model;
[0016] Figure 2 It is a side view structural schematic diagram of two groups of devices of the utility model installed on the inner wall of the ash unloading chamber;
[0017] The names of the various parts are: a cleaning scraper 1, a first scraper track 2-1, a second scraper track 2-2, a connecting rod 3, a push plate handle 4, a first limit block 5-1, a second limit block 5-2, a strip-shaped long opening 6, and an ash unloading chamber 7. DETAILED DESCRIPTION
[0018] Example 1
[0019] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0020] Reference Figure 1 The utility model provides a scraper-type hazardous waste ash removal device for a waste heat boiler, which consists of a cleaning scraper 1 (a rectangular plate made of 2205 stainless steel plate with a length of 74 cm, a width of 5 cm, and a thickness of 1 cm, and the width of the inclined inner wall of the ash unloading chamber is 76 cm), a first scraper track 2-1 and a second scraper track 2-2 (a length of 140 cm, a width of 2 cm, an interval of 68 cm, and the length of the inclined inner wall of the ash unloading chamber is 150 cm), a connecting rod 3 (a length of 40 cm and a diameter of 3 cm), a push plate handle 4 (made of wood material, with a length of 15 cm and a diameter of 3.5 cm), a first limit block 5-1 and a second limit block 5-2 (made of 2205 stainless steel plate, respectively welded at both ends of the first scraper track 2-1 and the second scraper track 2-2, with a length of 75 cm, a width of 3 cm, and a height of 3 cm), a strip long opening 6 (a rectangular structure, a length of 140 cm and a width of 3.5 cm), and an ash unloading chamber 7.
[0021] The cleaning scraper 1 is connected and fixed to the track sliders on the first scraper track 2-1 and the second scraper track 2-2 by screws (the track sliders are MG series or EG series linear track sliders), so that the cleaning scraper can slide on the scraper track without leaving the track. The first scraper track 2-1 and the second scraper track 2-2 are embedded and installed on the inclined inner wall of the ash unloading chamber (the ash unloading chamber is a hexahedral structure, connected to the waste heat boiler at the top, and connected to the ash unloading valve at the bottom to discharge ash. Two of the remaining four faces are trapezoidal structures pointing vertically downward, and usually no fine ash exists on the surface; the other two faces are rectangular structures with an inclination to the ground, and fine ash is easily stored on the slope). A set of scraper tracks 2 are embedded in the inclined inner walls on both sides (a total of two sets 2-1, 2-2). The plane formed by the first scraper track 2-1 and the second scraper track 2-2 is parallel to the inner wall of the ash unloading chamber, ensuring that the cleaning scraper will not contact the refractory material of the inner wall of the ash unloading chamber during the scraping process (there is a certain installation distance between the cleaning scraper and the refractory material of the inner wall). The limit blocks 5 are installed at the upper and lower ends of the scraper track 2 to limit the range of movement of the cleaning scraper 1 and prevent the cleaning scraper 1 from escaping from the scraper track 2 and becoming unusable. A strip-shaped long opening 6 is opened on the inclined wall of the ash unloading chamber, and the top opening and the bottom opening of the strip-shaped long opening 6 are located at the midpoint of the limit block 5 and intersect with it; the length of the strip-shaped long opening 6 is consistent with the length of the scraper track 2, and the cleaning scraper 1 is connected to the push plate handle 4 through the connecting rod 3 passing through the strip-shaped long opening 6, and the push plate handle 4 is located outside the ash unloading chamber. When the staff is cleaning the ash unloading chamber, they pull the push plate handle 4 to make the connecting rod 3 reciprocate up and down along the strip-shaped long opening 6 on the ash unloading chamber wall, and the connecting rod 3 drives the cleaning scraper 1 to move on the scraper track 2. When pushing the push plate handle 4 up and down, the connecting rod 3 should touch the top or bottom of the strip-shaped long opening 6 each time, and then make the opposite movement to ensure that the ash removal device covers the maximum area. The fine ash on the inner wall of the ash unloading chamber is affected by the cleaning scraper 1 and falls into the ash unloading valve.
[0022] In the implementation of the utility model, the ash removal device can remove more than 95% of the fine ash in the ash unloading room. There will be a very small amount of fine ash remaining in the position that the ash removal device cannot cover. However, due to the small amount of residue, it will not affect the heat exchange effect of the waste heat boiler. When the hazardous waste incineration disposal facility is shut down and the temperature of the waste heat boiler drops to normal temperature, the fine ash in the position that the ash removal device cannot cover can be manually cleaned.
[0023] To ensure the dust removal effect, when using the dust removal device, the two sets of dust removal devices are used at the same time as one dust removal operation. The interval between each operation should not be too long, and the time interval between operations can be determined based on the dust removal amount each time. When the dust removal amount of the two sets of dust removal devices is completed at one time, ≤0.1m 3 The ash removal device can be used once every 4 hours. When the ash output of two sets of ash removal devices is completed at one time > 0.1m 3When using the ash removal device, observe the ash discharge amount falling to the ash discharge valve. When the ash discharge amount is close to 0, stop the operation.
[0024] The ash removal device described in the utility model adopts a common linear metal scraper track or a metal ball scraper track on the market. When in use, due to the gap between the track slider and the track, the fine ash in the ash removal chamber will fall into the gap, increasing the resistance during sliding, resulting in unsmooth sliding; when too much fine ash is deposited, the track slider may even get stuck, causing the device to be unable to operate. Therefore, when selecting a scraper track, a linear slide rail with a dustproof function should be used, that is, a sealing gasket is installed on the side of the track, which can completely block the fine ash in the ash removal chamber outside the track to ensure smooth operation of the device.
[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent replacements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A scraper-type ash removal device for a hazardous waste waste heat boiler, characterized in that: The invention comprises a cleaning scraper (1) arranged in a waste heat boiler ash unloading chamber (7), a first scraper track (2-1) and a second scraper track (2-2), a connecting rod (3), a first limit block (5-1) and a second limit block (5-2), and a push plate handle (4) arranged outside the waste heat boiler ash unloading chamber (7); the cleaning scraper (1) is installed on the first scraper track (2-1) and the second scraper track (2-2), the first scraper track (2-1) and the second scraper track (2-2) are embedded and installed on the inner side of the ash unloading chamber wall, and the first limit block (5-1) and the second limit block (5-2) are installed respectively. At both ends of the first scraper track (2-1) and the second scraper track (2-2), the reciprocating area of the cleaning scraper (1) on the ash unloading chamber wall is limited; a strip-shaped long opening (6) is opened on the ash unloading chamber wall, and after the connecting rod (3) passes through the strip-shaped long opening (6), one end of the connecting rod (3) is connected to the push plate handle (4) by a screw, and the other end of the connecting rod (3) is connected to the cleaning scraper (1) by a screw; the push plate handle (4) drives the connecting rod (3), and then drives the cleaning scraper (1) to reciprocate along the strip-shaped long opening (6) on the first scraper track (2-1) and the second scraper track (2-2), thereby completing the ash removal of the inner wall of the ash unloading chamber.
2. A scraper-type ash removal device for a hazardous waste waste heat boiler as claimed in claim 1, characterized in that: The cleaning scraper (1) is a rectangular plate, the scraping surface of which faces the inner wall of the ash unloading chamber and is arranged parallel to the inner wall of the ash unloading chamber, and has a certain distance from the refractory material on the inner wall of the ash unloading chamber.
3. A scraper-type ash removal device for a hazardous waste waste heat boiler as claimed in claim 1, characterized in that: Track sliders are respectively installed on the first scraper track (2-1) and the second scraper track (2-2), and the dust cleaning scraper (1) is connected to the first scraper track (2-1) and the second scraper track (2-2) via the track sliders.
4. A scraper-type ash removal device for hazardous waste waste heat boiler according to claim 1, characterized in that: Sealing gaskets are installed on the sides of the first scraper track (2-1) and the second scraper track (2-2).