CN201779648U

CN201779648U - Improved structure of connecting portion of boiler slag discharging pipe and slag cooler

Info

Publication number: CN201779648U
Application number: CN2010202469764U
Authority: CN
Inventors: 解雪涛; 孙思敬; 赵峰; 宋洪鹏
Original assignee: NORTH CHINA ELECTRICAL POWER RESEARCH INSTITUTE (XI'AN) Co Ltd
Current assignee: Luo Zheng; XI'AN XINGYI POWER GENERATION & COMMISSIONING Co.,Ltd.
Priority date: 2010-07-02
Filing date: 2010-07-02
Publication date: 2011-03-30
Anticipated expiration: 2020-07-02

Abstract

An improved structure of the connecting portion of a boiler slag discharging pipe and a slag cooler is characterized in that the lower end of the slag discharging pipe (1) is fixedly connected with the upper end of an inner pipe (2) of a expansion joint, while the lower end of an outer pipe (3) of the expansion joint is fixedly connected with the upper end of a slag feeding pipe (5) of the slag cooler. An outer casing (4) is tightly combined with the outer walls of the inner pipe and the outer pipe. When the boiler is in operation, the slag discharging pipe can cause a certain expansion displacement, and particularly the longitudinal expansion amount is the largest. Therefore, the slag discharging pipe and the slag feeding pipe simultaneously extend downwards so as to cause a corresponding displacement relative to the outer pipe to drive the extensible soft outer casing to move simultaneously. As the slag discharging pipe and the slag feeding pipe are completely sealed through the expansion joint, heat and slag cannot leak, thereby ensuring not only the thermal efficiency of the boiler but also the quality of surrounding working environment and saving energy and protecting environment.

Description

The improvement structure of boiler slag removal pipe and slag cooler interface section

Technical field

The utility model relates to the improvement structure of a kind of boiler slag removal pipe and slag cooler interface section.

Background technology

The scum pipe that adopts the CFBB of roller slag cooler is directly to insert in the slag cooler cover plate mouth, and purpose is for the vertical and horizontal swell increment after absorbing scum pipe and being heated, so must leave big slit, the non-constant of sealing between the two.When slag cooler moves, the high temperature warm sludge that boiler is discharged is the high-head fluidized wind mixing inflow slag cooler of malleation with relative atmospheric pressure, cause fall in a large number slag and hot blast to reveal from the place, slit, form and serious leak out, leak ash, leak the slag phenomenon, cause serious dust pollution, near dust content of air is big, operation of harm equipment and staff's health.Near equipment and above equipment surface and a large amount of dust stratifications of workbench of dreg removing system, the equipment that influences normally moves.The leakage of hot flue gas and hot lime-ash makes the bigger heat of the interior existence of factory building leak outside, and the dreg removing system ambient temperature is very high, has worsened equipment and operations staff's working environment.The leakage of elevated temperature heat flue gas and hot lime-ash causes the part thermal loss, also reduces boiler efficiency.Elevated temperature heat flue gas and hot lime-ash leak outside between slag cooler cover plate and scum pipe, can make the slag cooler cover plate high temperature deformation at Active Interface place, and the metal parts of continuous erosive wear leakage point, the service life of reducing equipment rapidly.

Summary of the invention

The technical problems to be solved in the utility model is exactly the deficiency that exists in the existing structure for overcoming, and provides that a kind of good airproof performance, heat and dust can not leak, the improvement structure of the boiler slag removal pipe of environmental protection and energy saving and slag cooler interface section.

Technical solution of the present utility model is:

Fixedlying connected with the upper end of pipe in the expansion joint in the scum pipe lower end, and fixedlys connected with the upper end of slag cooler slag feed pipe in the lower end of expansion joint outer tube, and the outer wall of the ectosome of expansion joint and interior pipe and outer tube is combined closely.

Further technical solution of the present utility model is:

Pipe and outer tube outer wall coat the ectosome that is made of flexible material in the expansion joint, and this ectosome has function of heat insulation.

The utility model is owing to structurally improve, thoroughly solve poorly sealed the causing of boiler furnace scum pipe and slag cooler cover plate interface and leaked out, leaked ash, the serious equipment deficiency of leakage slag, no dust pollution improves interior equipment of boiler factory building and operations staff's working environment.Reduce to zero by the thermal loss that high temperature wind that leaks out between scum pipe and the slag cooler cover plate and high-temperature ash are taken system out of, can improve unit efficiency, reduced residue extraction mechanism regional environment temperature.After adopting sealing flexible expansion joint, system is in air-tight state, uses the high-temperature wearable design in the expansion joint, can lay corrosive-proof plastic material, avoids the high temperature wear of part of appliance, prolongs the service life of equipment, saves the plant maintenance recondition expense.

Description of drawings

Accompanying drawing is a structural representation of the present utility model.

The specific embodiment

As shown in drawings; between scum pipe 1 that links to each other with the boiler slag removal mouth and slag cooler slag feed pipe, be fixedly connected with an expansion joint; pipe 2 and outer tube 3 in having in this expansion joint; wherein; the external diameter of interior pipe 2 is less than the internal diameter of outer tube 3; the part of interior pipe 2 is inserted in the outer tube 3; has the gap between the tube wall of the two; the ectosome 4 of interior pipe 2 and outer tube 3 is made by flexible insulant material such as high temperature resistant rock wool material; outside by high temperature resistant nonmetal covering or ripple body of stainless steel seal protection, this ectosome 4 is combined closely with the outer wall of interior pipe 2 and outer tube 3.The lower end of scum pipe 1 directly with expansion joint in the upper end welded seal of pipe 2, and the lower end of expansion joint outer tube 3 is direct and the upper end welded seal of slag cooler slag feed pipe 5.

After the boiler operatiopn, scum pipe 1 will produce certain displacement with the expansion of boiler body, is maximum with the longitudinal dilatation amount especially.So scum pipe 1 extends downwards simultaneously with interior pipe 2, outer tube produces vertical relative displacement relatively, drives also motion simultaneously of retractable and flexible ectosome 4.Because expansion joint so heat and lime-ash can not leak, both can guarantee the thermal efficiency of boiler with sealing fully between scum pipe 1 and the slag feed pipe 5, the working environment quality around guaranteeing again, the purpose of realization energy-conserving and environment-protective.

Claims

1. the improvement structure of boiler slag removal pipe and slag cooler interface section, fixedly connected in the upper end that it is characterized in that pipe (2) in scum pipe (1) lower end and the expansion joint, and fixedly connected with the upper end of slag cooler slag feed pipe (5) in the lower end of expansion joint outer tube (3), and the ectosome of expansion joint (4) is combined closely with the outer wall of interior pipe (2) and outer tube (3).

2. the improvement structure of boiler slag removal pipe and slag cooler interface section according to claim 1 is characterized in that the internal diameter of the external diameter of pipe (2) in the expansion joint less than outer tube (3), and interior pipe (2) stretches in the outer tube (3).

3. the improvement structure of boiler slag removal pipe as claimed in claim 1 and slag cooler interface section is characterized in that pipe (2) and the outer ectosome (4) that is made of flexible material that coats of outer tube (3) in the expansion joint.