CN-224214922-U - Anti-blocking special three-way device for ash conveying pipeline of coal economizer

CN224214922UCN 224214922 UCN224214922 UCN 224214922UCN-224214922-U

Abstract

The utility model discloses an anti-blocking special three-way device for an ash conveying pipeline of an economizer, which comprises a three-way body, wherein the three-way body comprises a horizontal inlet, a horizontal outlet and an inclined outlet, a large-aperture filter screen is arranged at the horizontal outlet of the three-way body, a detachable blocking plate is connected with a flange of the inclined outlet of the three-way body through bolts, the blocking plate is used for sealing the inclined outlet, flanges are arranged at an inlet and an outlet of the three-way body, and corresponding counter flanges are arranged at the flanges of the horizontal inlet and the horizontal outlet. According to the utility model, the large-aperture filter screen is arranged at the horizontal outlet of the tee body, sundries conveyed along with the fly ash are intercepted, and the plug is conveniently and rapidly cleaned through the design of the detachable plug plate. In addition, the utility model also adopts the arc or spiral guide plate to optimize the flow path of the fly ash, reduce the impact on the filter screen and prolong the service life of the filter screen.

Inventors

HAN HUI
CHEN YICAI
YANG JIANGTAO
YANG DAOYUAN
WANG ZHEN

Assignees

中电建地热开发有限公司

Dates

Publication Date: 20260508
Application Date: 20250616

Claims (6)

1. The anti-blocking special three-way device for the ash conveying pipeline of the coal economizer comprises a three-way body and is characterized in that the three-way body is provided with a horizontal inlet, a horizontal outlet and an inclined outlet, a large-aperture filter screen is arranged at the horizontal outlet of the three-way body and used for intercepting sundries conveyed along with coal ash, a detachable blocking plate is connected to a flange of the inclined outlet of the three-way body through bolts and used for sealing the inclined outlet and used for cleaning sundries in front of the filter screen, flanges are arranged at an inlet and an outlet of the three-way body, and corresponding counter flanges are arranged at the flanges of the horizontal inlet and the outlet.
2. The anti-blocking special three-way device for the ash conveying pipeline of the coal economizer, which is disclosed in claim 1, is characterized in that the flange and the counter flange are connected through a bolt, a sealing gasket is arranged at the joint to ensure sealing performance, a sealing gasket is also arranged between the flange and the blocking plate, and a locking washer is arranged at the nut end of the bolt to prevent the bolt from loosening due to vibration in the ash conveying process.
3. The anti-blocking special three-way device for the ash conveying pipeline of the coal economizer, disclosed by claim 1, is characterized in that the large-aperture filter screen is of a detachable structure and is convenient to replace or clean periodically, the filter screen is made of high-strength stainless steel materials so as to adapt to the high-pressure environment in the ash conveying pipeline, the aperture size of the large-aperture filter screen is designed according to the size of fly ash particles in the ash conveying pipeline, the aperture distribution of the filter screen is of a gradual change structure, the aperture at one side close to a horizontal inlet is larger, the aperture at one side close to the horizontal outlet is gradually reduced, and the aperture change range is 10mm to 5mm so as to improve the interception efficiency and reduce the blocking probability.
4. The special anti-blocking three-way device for the ash conveying pipeline of the coal economizer, disclosed in claim 1, is characterized in that a guide plate is arranged in the horizontal pipeline of the through body and at the upstream of the large-aperture filter screen and is used for guiding the fly ash to uniformly pass through the filter screen, so that the impact on the filter screen is reduced, and the service life of the filter screen is prolonged.
5. The anti-blocking special three-way device for the ash conveying pipeline of the coal economizer, as set forth in claim 4, is characterized in that the guide plate is an arc guide plate, the radius of the arc guide plate is 150mm, the length of the arc guide plate is 300mm, the arc guide plate is tangent to the inner wall of the three-way body to optimize the flow path of the coal ash, or the guide plate is a spiral guide plate, the pitch of the spiral guide plate is 50mm, and the pitch of the spiral guide plate is 10mm, so that the coal ash can be guided to flow along the spiral path, and direct impact is reduced.
6. The special anti-blocking tee joint device for the ash conveying pipeline of the coal economizer, as set forth in claim 1, is characterized in that an abrasion-resistant and anti-corrosion coating is coated on the inner wall of the tee joint body, and the coating is a polytetrafluoroethylene coating so as to prolong the service life of the device.

Description

Anti-blocking special three-way device for ash conveying pipeline of coal economizer Technical Field The utility model relates to the technical field of ash conveying systems of thermal power plants, in particular to a special three-way device for preventing an ash conveying pipeline of an economizer from being blocked. Background In a thermal power plant, an economizer ash conveying system is an important component for ensuring the normal operation of a boiler, and the main function of the economizer ash conveying system is to convey fly ash generated by the economizer to a specified ash bin or a treatment device through a pipeline. However, during actual operation, impurities such as wear shoes, falling refractory materials, welding slag and the like in the economizer may fall down to the ash conveying pipeline, resulting in pipeline blockage. Once the blockage occurs, the pressure transmitter of the system can give an alarm, the on-site pressure gauge displays positive pressure, the pressure in the pipeline is abnormally increased, and measures are required to be rapidly taken at the moment to process the pressure so as to restore the normal operation of the system. The ash conveying system of the coal economizer generally adopts a compressed air pneumatic conveying mode, and negative pressure is arranged in an ash conveying pipeline during normal operation of the system. When the ash conveying pipeline is blocked, the pressure in the pipeline can be rapidly increased, a pressure transmitter on the pipeline can give out pressure alarm, and the on-site pressure gauge displays positive pressure. This pressure change is a significant signal of a system blockage, but by this means the blockage point cannot be located quickly. As the ash conveying pipeline has the conditions of long pipeline, more turning parts, most of ash conveying pipelines are positioned in high-altitude areas and the like, once the ash conveying pipeline is blocked, a large number of scaffolds are required to be erected, and a large amount of manpower and time are required to be spent for checking and processing gradually along the pipeline so as to find out blocking points and clean the blocking points. The process is time-consuming and labor-consuming, and can possibly cause the ash conveying system of the coal economizer to stop running, thereby indirectly causing the consequences of unit stop running and the like and seriously affecting the safe and stable running of the unit. The existing ash conveying pipeline system has the main problems that the positioning of ① is difficult, the pipeline is long and turns are more, most of the ash conveying pipeline system is positioned in a high-altitude area, the blocking points are difficult to quickly position, the ② is high in maintenance cost, a large number of scaffolds are required to be erected, a large amount of manpower and time are consumed for checking and cleaning, ③ is difficult to clean, and blocking objects can be blocked inside the pipeline and are difficult to take out, so that the cleaning is difficult. Disclosure of utility model The utility model aims to solve the technical problem of providing the special anti-blocking three-way device for the ash conveying pipeline of the coal economizer, which aims to quickly position a blocking point and facilitate clearing of a blocking object, thereby improving the reliability and maintenance efficiency of an ash conveying system. According to the utility model, the large-aperture filter screen is arranged at the horizontal outlet of the tee body, sundries conveyed along with the fly ash are intercepted, and the plug is conveniently and rapidly cleaned through the design of the detachable plug plate. In addition, the utility model also adopts the arc or spiral guide plate to optimize the flow path of the fly ash, reduce the impact on the filter screen and prolong the service life of the filter screen. The technical scheme adopted by the utility model for solving the technical problems is as follows: The anti-blocking special three-way device for the ash conveying pipeline of the coal economizer comprises a three-way body, wherein the three-way body is provided with a horizontal inlet, a horizontal outlet and an inclined outlet, a large-aperture filter screen is arranged at the horizontal outlet of the three-way body and used for intercepting sundries conveyed along with coal ash, a detachable blocking plate is connected to a flange of the inclined outlet of the three-way body through bolts and used for sealing the inclined outlet and used for cleaning sundries in front of the filter screen, flanges are arranged at an inlet and an outlet of the three-way body, and corresponding counter flanges are arranged at the flanges of the horizontal inlet and the horizontal outlet. The flange and the counter flange are connected through bolts, sealing gaskets are arranged at the connecting positions to ensure sealing performance, sealing gaskets