CN110878939A

CN110878939A - Detachable high-temperature wear-resistant pulverized coal burner nozzle

Info

Publication number: CN110878939A
Application number: CN201911280788.5A
Authority: CN
Inventors: 牛海峰; 于淼; 单玉华
Original assignee: Harbin Boshen Science & Technology Development Co Ltd
Current assignee: Harbin Boshen Science & Technology Development Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-03-13

Abstract

The invention relates to a detachable high-temperature wear-resistant pulverized coal burner nozzle, which relates to a burner nozzle and aims to solve the problems that the conventional pulverized coal nozzle and a blunt body are inconvenient to replace in integral casting and the pulverized coal nozzle and the blunt body cannot be relatively displaced so that the burner has a small adaptation range to coal types of fire coal. The invention is used in the technical field of boilers. The invention is an assembly molding structure, the blunt body of the nozzle of the burner can move, adjust the burning state; when the blunt body is worn and needs to be replaced, the pulverized coal burner nozzle does not need to be integrally replaced, only the blunt body needs to be replaced independently, the workload is reduced, and the replacement cost, the maintenance time and the cost are saved.

Description

Detachable high-temperature wear-resistant pulverized coal burner nozzle

Technical Field

The invention relates to a burner nozzle, in particular to a detachable high-temperature wear-resistant pulverized coal burner nozzle, and belongs to the technical field of boilers.

Background

The existing pulverized coal burner nozzle is integrally cast or welded by a pulverized coal nozzle and a blunt body as shown in figures 4-5 of attached drawings of the specification. When the burner is in operation, when a primary air-powder mixture passes through the bluff body, a stable backflow area is generated, so that the ignition point is stable, the pulverized coal and air are mixed more sufficiently and uniformly, early volatile matters in the air-powder mixture are separated out more quickly, the burning and stable burning performance of the primary air-powder mixture is ensured, the burnout degree of higher pulverized coal particles can be kept, certain adaptability of the burner is improved, and the emission of ultra-low nitrogen oxides is further realized.

The problems of the existing burner nozzle are as follows:

1. because the pulverized coal nozzle and the bluff body are not abraded synchronously in work, the bluff body is abraded quickly generally, when the bluff body needs to be replaced, the pulverized coal nozzle can work normally for a long time, but because the pulverized coal nozzle and the bluff body are integrally cast, only the nozzle of the whole pulverized coal burner can be replaced in replacement, the workload is large, and economic waste is caused;

2. because the pulverized coal nozzle and the blunt body are integrally cast or welded, the pulverized coal nozzle and the blunt body cannot make relative displacement; because the coal quality of the domestic boiler is changed greatly and unstable at present, the structure of the nozzle of the pulverized coal burner is fixed after the nozzle is processed, and the nozzle is burnt or formed frequently when high-quality coal with high heat value, high volatile matter and the like is combusted; poor-quality coal with low heat value, poor volatile matter, high ash content and the like can be burnt insufficiently and has poor burnout property; the blunt body position of buggy spout directly influences the use and the function of combustor, and when the coal quality changed, can not the back-and-forth movement between buggy spout and the blunt body, the uncontrollable backflow zone of adjusting, the combustor is less to the coal kind accommodation, influences the accommodation of combustor to the coal.

Disclosure of Invention

The invention aims to solve the problems in the prior art and further provides a detachable high-temperature wear-resistant pulverized coal burner nozzle.

The technical scheme adopted by the invention for solving the problems is as follows:

the utility model provides a can dismantle high temperature resistant pulverized coal burner spout, it includes pulverized coal spout, blunt body and two slide components, the both sides of blunt body respectively through one the slide component can be dismantled with the inner wall of pulverized coal spout and be connected.

Furthermore, sliding plates are arranged at two ends of the blunt body.

Furthermore, each slide assembly comprises a stop block, a pin shaft and a slide, the slide is fixedly connected with the inner wall of the pulverized coal nozzle, the stop blocks are arranged at two ends of the slide respectively, the slide is in sliding connection with the slide, the slide can move in a reciprocating mode along the length direction of the slide, and the slide are fixed through the pin shaft.

Furthermore, the slide is provided with a plurality of first pin shaft holes along the length direction.

Further, the slide is equipped with a plurality of second round pin shaft holes that correspond with first round pin shaft hole, and the round pin axle passes second round pin shaft hole and first round pin shaft hole in proper order and is connected slide and slide.

Further, the blunt body is linear.

Further, the bluff body is in a circular arc shape.

Further, the blunt body is an airfoil shape.

Further, the blunt body has a concave-convex groove shape.

Further, the blunt body is serrated.

The invention has the beneficial effects that:

1. the invention is an assembly molding structure, when the blunt body is worn and needs to be replaced, the nozzle of the pulverized coal burner does not need to be integrally replaced, and only the blunt body needs to be replaced independently, thereby reducing the workload, and saving the replacement cost, the maintenance time and the cost;

2. the blunt body can move back and forth, and according to different coal qualities entering a boiler, an operator controls and adjusts the combustion backflow area by adjusting the front and back positions of the blunt body, so that the combustion performance is optimized, the coal type adaptation range is improved, and the burning loss, coking, high-temperature corrosion and the like of a pulverized coal burner when the boiler burns coal with high volatile matter, high sulfur and low ash fusion point are prevented;

3. the combustion efficiency, the stable combustion performance and the emission reduction performance of the combustor are improved;

4. the service life of the pulverized coal burner is prolonged, and the economic benefit is considerable.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a front view of a prior art pulverized coal burner nozzle;

fig. 5 is a right side view of fig. 4.

Detailed Description

The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 3, and the detachable high-temperature wear-resistant pulverized coal burner nozzle according to the present embodiment includes a pulverized coal nozzle 1 and a blunt body 2, and is characterized in that: the detachable high-temperature wear-resistant pulverized coal burner nozzle further comprises two slideway components, and two sides of the blunt body 2 are detachably connected with the inner wall of the pulverized coal nozzle 1 through the slideway components respectively.

Because pulverized coal nozzle 1 and blunt body 2 are the assembly forming structure, when blunt body wearing and tearing need be changed, do not need whole change pulverized coal burner nozzle, only need change the blunt body alone, reduced work load, practice thrift replacement cost, maintenance time and expense.

The blunt body 2 material can be different or the same with pulverized coal nozzle 1 material, wear-resisting steel, wear-resisting cast iron, wear-resisting many alloy material, wear-resisting non-metallic material etc. of higher service temperature are chooseed for use to the blunt body of easy wearing and tearing, and pulverized coal nozzle still continues to use former material, make pulverized coal nozzle 1 and blunt body 2 wear and tear near synchronous or the blunt body is high temperature resistant wearability stronger, can furthest improve pulverized coal burner nozzle high temperature resistant, wearability, extension pulverized coal burner nozzle life.

The second embodiment is as follows: referring to fig. 1 to 3, the present embodiment will be described, in which sliding plates 2-1 are provided at both ends of the blunt body 2. The sliding plate 2-1 and the blunt body 2 are integrally formed.

Other components and connections are the same as those in the first embodiment.

The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 3, each slide way assembly in the embodiment includes a stopper 3, a pin 4 and a slide way 5, the slide way 5 is fixedly connected with the inner wall of the pulverized coal nozzle 1, the stoppers 3 are respectively arranged at two ends of the slide way 5, the slide plate 2-1 is slidably connected with the slide way 5, the slide plate 2-1 can reciprocate along the length direction of the slide way 5, and the slide plate 2-1 and the slide way 5 are fixed by the pin 4. The pin 4 may also be square, triangular or the like, and when the pin 4 is square, triangular or other shapes, the shape of the pin hole changes accordingly, so as to be adapted to the shape of the pin 4, so as to be better matched for use.

When the pin shaft 4 is matched with different pin shaft holes, different relative positions of the pulverized coal nozzle 1 and the blunt body 2 can be obtained. Carry on spacingly through dog 3 to the bluff body in the slide, the bluff body can follow the length direction rectilinear movement of slide, and according to going into the stove coal quality difference, operating personnel is through adjusting bluff body front and back position, and control adjustment burning backward flow district has promptly optimized combustion performance, has improved coal type accommodation.

According to the difference of the positions of the slideways 5, the blunt bodies 2 can be arranged horizontally, vertically, horizontally and vertically in a cross way, and the like, and according to the difference of the coal quality, the blunt bodies 2 in the horizontal direction can be arranged in 1-4 rows, and the blunt bodies 2 in the vertical direction can be arranged in 1-4 rows, so that the combustion requirements on the coal quality under different working conditions are met, the adaptation range of the burner to the coal quality is expanded, and the high-efficiency and stable combustion performance of the pulverized coal burner is ensured.

Other components are connected in the same manner as in the first or second embodiment.

The fourth concrete implementation mode: in the present embodiment, a plurality of first pin hole holes are provided in the slide 5 in the longitudinal direction thereof, as described with reference to fig. 1 to 3.

Other components and connection relationships are the same as those in the first, second or third embodiment.

The fifth concrete implementation mode: referring to fig. 1 to 3 and fig. 2, the sliding plate 2-1 of the present embodiment is provided with a plurality of second pin shaft holes corresponding to the first pin shaft holes, and the pin shaft 4 sequentially passes through the second pin shaft holes and the first pin shaft holes to connect the sliding plate 2-1 with the slideway 5.

Other components and connections are the same as those of the first, second, third or fourth embodiments.

The sixth specific implementation mode: the present embodiment will be described with reference to fig. 1 to 3, and the blunt body 2 of the present embodiment has a linear shape. According to different coal quality of boiler combustion, the bluff body 2 can be designed into different shapes and sizes to improve the combustion efficiency, stable combustion and emission reduction performance.

The bluff body 2 is suitable for various situations with the peripheral wind nozzle size of H1-H2, H1 > H2 and H1 < H2 according to different coal qualities, and is suitable for various linear and curved structural forms of the nozzle.

Other components and connection relationships are the same as those in the first, second, third, fourth or fifth embodiment.

The seventh embodiment: the present embodiment will be described with reference to fig. 1 to 3, and the blunt body 2 of the present embodiment has a circular arc shape.

Other components and connection relationships are the same as those in the first, second, third, fourth, fifth or sixth embodiment.

The specific implementation mode is eight: the present embodiment will be described with reference to fig. 1 to 3, and the blunt body 2 of the present embodiment has an airfoil shape.

Other components and connection relations are the same as those of the first, second, third, fourth, fifth, sixth or seventh embodiment.

The specific implementation method nine: the present embodiment will be described with reference to fig. 1 to 3, and the blunt body 2 of the present embodiment has a concave-convex groove shape.

Other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh or eighth embodiment.

The detailed implementation mode is ten: the present embodiment will be described with reference to fig. 1 to 3, in which the blunt body 2 is a zigzag shape. Other components and connection relations are the same as those of the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth embodiment.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a can dismantle high temperature resistant pulverized coal burner spout, it includes pulverized coal spout (1) and blunt body (2), its characterized in that: the detachable high-temperature wear-resistant pulverized coal burner nozzle further comprises two slide way assemblies, and the two sides of the blunt body (2) are detachably connected with the inner wall of the pulverized coal nozzle (1) through the slide way assemblies respectively.

2. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 1, wherein: sliding plates (2-1) are arranged at two ends of the blunt body (2).

3. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 1, wherein: each slide way assembly comprises a stop block (3), a pin shaft (4) and a slide way (5), the slide way (5) is fixedly connected with the inner wall of the pulverized coal nozzle (1), the stop blocks (3) are respectively arranged at two ends of the slide way (5), the slide plate (2-1) is slidably connected with the slide way (5), the slide plate (2-1) can reciprocate along the length direction of the slide way (5), and the slide plate (2-1) is fixed with the slide way (5) through the pin shaft (4).

4. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 3, wherein: the slide (5) is provided with a plurality of first pin shaft holes along the length direction.

5. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 2 or 4, wherein: the sliding plate (2-1) is provided with a plurality of second pin shaft holes corresponding to the first pin shaft holes, and the pin shaft (4) sequentially penetrates through the second pin shaft holes and the first pin shaft holes to connect the sliding plate (2-1) with the slide rail (5).

6. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 1, wherein: the bluff body (2) is linear.

7. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 1, wherein: the bluff body (2) is arc-shaped.

8. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 1, wherein: the bluff body (2) is of an airfoil shape.

9. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 1, wherein: the bluff body (2) is in a concave-convex groove shape.

10. The removable high temperature and wear resistant pulverized coal burner nozzle of claim 1, wherein: the blunt body (2) is in a sawtooth shape.