CN217031178U

CN217031178U - Structure for reducing carbon content of boiler bottom slag

Info

Publication number: CN217031178U
Application number: CN202123042225.8U
Authority: CN
Inventors: 蒋俊芳; 丁新利; 姜建
Original assignee: Jiangsu Huineng Heavy Industry Co ltd
Current assignee: Jiangsu Huineng Heavy Industry Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-07-22
Anticipated expiration: 2031-12-07

Abstract

The utility model relates to the technical field of air distribution systems, in particular to a structure for reducing the carbon content of bottom slag of a boiler, which comprises a boiler body and a coal dropping pipe arranged on the boiler body, the coal dropping pipe is connected with the boiler body in a penetrating way, a coal dropping opening is arranged at the joint position of the coal dropping pipe and the boiler body, the interior of the boiler body is divided into a combustion chamber and an air chamber through a hood structure, the combustion chamber and the coal falling port are arranged above, the air chamber is arranged below, a slag falling pipe is arranged in the air chamber and is connected with the blast cap structure, the angles of the four blast cap holes at the inner side of the blast cap structure close to the slag dropping pipe are arranged upwards, and the slag dropping pipe is arranged at the position close to the rear wall of the hearth.

Description

Structure for reducing carbon content of boiler bottom slag

Technical Field

The utility model belongs to the technical field of components in an air distribution system, and particularly relates to a structure for reducing carbon content of boiler bottom slag.

Background

In order to respond to the call of national energy conservation and emission reduction, most enterprises carry out low-nitrogen upgrading and transformation on boilers, the relative material concentration in the boilers is relatively high, and the requirement of controlling the emission of nox is met. After the concentration of the materials in the hearth rises, the bed temperature in the hearth slightly drops, and certain influence is generated on the burnout degree of bottom slag discharge.

Under original high bed temperature mode, because pyrolysis's effect, the coal grain is comparatively easy broken for the burnout degree of end sediment is higher, and end sediment carbonaceous content is in lower state. After low-nitrogen modification, the hearth bed temperature is reduced, and the cracking effect on coal particles is reduced. The carbon content of the bottom slag is increased, and the heat loss of the boiler is increased.

Present hood is when the design, all hood holes are the level or the state down, at the actual motion in-process, if hood hole department is in the state down, the kinetic energy of wind in the hood at the in-process formation that blows off can make the granule of not burning out very easily bring furnace out, discharge in the sediment pipe that falls, cause the higher phenomenon of end sediment carbonaceous content, and because the sediment mouth that falls of former design is relatively nearer with the coal breakage mouth, the coal cinder has just been taken out furnace under the condition that has not reached to burn out, consequently need design a structure that reduces the sediment carbonaceous content at the bottom of the boiler and solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model aims to reduce the phenomenon of higher carbon content of bottom slag after the application of the low-nitrogen technology, and provides a structure for reducing the carbon content of the bottom slag of a boiler, which comprises the following specific implementation modes:

the utility model provides a structure for reducing the carbon content of boiler bottom slag, which comprises a boiler body and a coal dropping pipe arranged on the boiler body, wherein the coal dropping pipe is connected with the boiler body in a penetrating way, a coal dropping port is arranged at the joint of the coal dropping pipe and the boiler body, the interior of the boiler body is divided into a combustion chamber and an air chamber through an air cap structure, the combustion chamber and the coal dropping port are arranged above the air chamber, the air chamber is arranged below the air chamber, a slag dropping pipe is arranged in the air chamber and connected with the air cap structure, the angles of four inner side air cap holes at the inner side of the air cap structure, which are close to the slag dropping pipe, are arranged upwards, and the slag dropping pipe is arranged at the position close to the rear wall of a hearth.

The utility model is further improved in that: the boiler body comprises a hearth front wall, a hearth rear wall and hearth side walls connected between the hearth front wall and the hearth rear wall, and the hearth is surrounded by the hearth front wall, the hearth rear wall and the two hearth side walls.

The utility model is further improved in that: the blast cap structure sets up around the sediment pipe that falls, blast cap structure inboard leans on the angular adjustment of four inboard blast cap holes of sediment pipe position is 5 jiaos up, can make unburned coal grain can be by the intensive combustion before the whereabouts for end sediment carbon content further reduces.

The utility model is further improved in that: and the positions and angles of the four outer blast cap holes of which the outer sides are far away from the slag falling pipe and other blast caps are arranged to be downward 15 degrees.

The utility model is further improved in that: the coal dropping port is arranged on the front wall of the hearth and in the middle of the hearth, the coal dropping pipe is longer in time to the slag dropping pipe due to the structural arrangement, and bottom slag is easily burnt out.

The utility model is further improved in that: the slag falling pipe is arranged at the distance of two thirds of the two sides of the hearth and is close to the rear wall part of the hearth, because the side wall part of the hearth is not positioned at the position of the oxygen-poor area, the oxygen content is relatively high, and the unburned coal particles can be further intensively combusted in the edge area again, so that the aim of reducing the carbon content of the bottom slag is fulfilled.

The utility model has the beneficial effects that:

the utility model optimizes the arrangement of the blast cap structure and adjusts the existing blast cap structure appropriately, so that unburnt particles can be burnt out as much as possible in the falling process of bottom slag, the arrangement position of the slag falling port is optimized, the discharge time of coal particles from falling is prolonged, the burnout degree is further increased, the retention time of the coal particles in the furnace can be prolonged, the heat loss of the boiler is reduced, and the thermal efficiency of the boiler is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a side view configuration of the present invention;

FIG. 3 is an enlarged view of the section B of the present invention;

reference numerals: 1-boiler body, 2-coal dropping pipe, 3-hearth front wall, 4-hearth rear wall, 5-hearth side wall, 6-hearth, 7-coal dropping port, 8-blast cap structure, 9-combustion chamber, 10-blast chamber, 11-slag dropping pipe, 12-inner blast cap hole, 13-outer blast cap hole and 14-slag dropping port.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.

The embodiment provides a structure for reducing the carbon content of boiler bottom slag, which comprises a boiler body 1 and a coal dropping pipe 2 arranged on the boiler body 1, wherein the boiler body 1 comprises a hearth front wall 3, a hearth rear wall 4 and hearth side walls 5 connected between the hearth front wall 3 and the hearth rear wall 4, the hearth front wall 3, the hearth rear wall 4 and the two hearth side walls 5 are enclosed to form a hearth 6, the coal dropping pipe 2 is connected with the boiler body 1 in a penetrating manner, a coal dropping port 7 is arranged at the joint position of the coal dropping pipe 2 and the boiler body 1, the interior of the boiler body 1 is divided into a combustion chamber 9 and an air chamber 10 through an air cap structure 8, the combustion chamber 9 and the coal dropping port 7 are arranged above, the air chamber 10 is arranged below, a slag dropping pipe 11 is arranged in the air chamber 10, and the slag dropping pipe 11 is connected with the air cap structure 8, the inner sides of the blast cap structures 8 are arranged upwards at the angles of four inner side blast cap holes 12 close to the slag falling pipe 11, and the slag falling pipe 11 is arranged at a position close to the rear wall 4 of the hearth.

Blast cap structure 8 sets up around slag pipe 11, blast cap structure 8 is inboard to lean on four of slag pipe 11 position the angular adjustment of outside blast cap hole 13 is 5 jiaos up, and the outside is kept away from four of slag pipe 11 outside blast cap hole 13 position angle and other blast caps set up to 15 jiaos down, will inside blast cap hole 12 sets up to 5 backs up, the direction that inside blast cap hole 12 blew out is up, has played certain lift effect to the end sediment, has delayed the time that the end sediment falls, because slag pipe 11 is all around blast cap structure 8 is stronger for the great amount of wind in blast cap aperture of other positions in middle part, can make the coal grain that does not burn completely can be reinforceed the burning before the whereabouts for end sediment carbon content further reduces.

The coal dropping port 7 is arranged on the front wall 3 of the hearth and in the middle of the hearth 6, when the coal dropping port is operated, under the influence of gravity, more coal particles fall in front of the furnace, if the slag dropping pipe 11 is arranged in the middle of the hearth 6, the time from the coal dropping pipe 2 to the slag dropping pipe 11 is shorter, the end of the slag dropping pipe 11 is provided with a slag dropping port 14 which is convenient for discharging coal slag, and the arrangement position is in a poor oxygen region in the middle, bottom slag is not easy to be burnt out, so the slag dropping pipe 11 is arranged at the two thirds distance of the two sides of the hearth 6 and the position close to the rear wall 4 of the hearth, the structure prolongs the time from the coal dropping pipe 2 to the slag dropping pipe 11, prolongs the distance from the coal dropping port 7 to the slag dropping pipe 11, so that the coal particles have enough time to be combusted in the furnace, and the position of the side wall 5 is not in the poor oxygen region, the oxygen content is relatively high, and the unburned coal particles can be further intensively combusted in the edge area again, so that the aim of reducing the carbon content of the bottom slag is fulfilled.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are used in the orientations and positional relationships indicated in the drawings, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the drawings of the present invention, the filling pattern is only for distinguishing the layers, and is not limited to any other.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a reduce structure of boiler bottom sediment carbonaceous content which characterized in that: be in including boiler body and setting coal breakage pipe on the boiler body, coal breakage pipe with boiler body through connection, coal breakage pipe with the position of boiler body handing-over is equipped with the coal breakage mouth, boiler body is inside to be divided into combustion chamber and plenum through the hood structure, the combustion chamber with the coal breakage mouth sets up in the top, the plenum sets up in the below, be provided with the slag pipe in the plenum, the slag pipe with hood structural connection, the hood structural inboard leans on the angle up setting in four inboard hood holes of slag pipe position falls, the slag pipe is established and is being close to furnace back wall position.

2. The structure for reducing the carbon content of the boiler bottom slag according to claim 1, wherein: the boiler body comprises a hearth front wall, a hearth rear wall and hearth side walls connected between the hearth front wall and the hearth rear wall, wherein the hearth front wall, the hearth rear wall and the two hearth side walls are enclosed to form a hearth.

3. The structure for reducing the carbon content of the boiler bottom slag according to claim 1, characterized in that: the blast cap structure is arranged on the periphery of the slag falling pipe, and the angles of four inner side blast cap holes close to the slag falling pipe are adjusted to be 5 degrees upwards.

4. The structure for reducing the carbon content of the boiler bottom slag according to claim 2, characterized in that: and the positions and angles of the four outer blast cap holes of which the outer sides are far away from the slag falling pipe and other blast caps are arranged to be downward 15 degrees.

5. The structure for reducing the carbon content of the boiler bottom slag according to claim 1, wherein: the coal dropping port is arranged on the front wall of the hearth and arranged in the middle of the hearth.

6. The structure for reducing the carbon content of the boiler bottom slag according to claim 1, characterized in that: the slag falling pipe is arranged at the distance of two thirds of the two sides of the hearth and close to the rear wall part of the hearth.