CN206669719U

CN206669719U - With the boiler structure for avoiding water wall high temperature corrosion function

Info

Publication number: CN206669719U
Application number: CN201720385355.6U
Authority: CN
Inventors: 张存泉; 杨鑫
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2017-04-13
Filing date: 2017-04-13
Publication date: 2017-11-24
Anticipated expiration: 2027-04-13

Abstract

The utility model discloses a kind of boiler structure for having and avoiding water wall high temperature corrosion function, including boiler body, the boiler body has the burner hearth to be burnt in a manner of quadrangle tangential circle, and the surrounding side wall upper part of the burner hearth offers the adherent wind snout that several are in transversely arranged arrangement；Offer several fire air nozzles, several wind snout and several plasma burner spouts on four angles of the burner hearth successively from top to bottom along burner hearth central axial direction, each wind snout and the surface of plasma burner spout and underface are provided with several overfire air ports.The utility model coordinates fire air nozzle, a wind snout and overfire air port by designing adherent wind snout, so that internal-combustion is more abundant, avoid the reducibility gas excessive concentration such as carbon monoxide and hydrogen sulfide, adherent wind energy avoids heat from being accumulated in inwall simultaneously, so as to avoid the phenomenon of water-wall corrosion.

Description

With the boiler structure for avoiding water wall high temperature corrosion function

Technical field

Boiler structure is the utility model is related to, in particular to a kind of boiler knot for having and avoiding water wall high temperature corrosion function Structure.

Background technology

High temperature corrosion refers to outside thermal-flame and the high-temperature flue gas area, water-cooling wall, superheater and reheater etc. of pulverized-coal fired boiler The phenomenon that portion corrodes.High temperature corrosion type has three kinds, be respectively chloride type high temperature corrosion, sulfate type high temperature corrosion and Sulfide type high temperature corrosion.Currently in order to avoid pulverized-coal fired boiler from producing high temperature corrosion, typically using low-sulfur coal as boiler oil, Low-sulfur coal belongs to the ature of coal for being not susceptible to high temperature corrosion.However, because the ature of coal moisture of low-sulfur coal increases, cause the wind of First air Rate is higher, and the wind rate of Secondary Air is relatively low, and combustion system is abnormal, and coal dust, which is postponed, to catch fire, and wall local heat load is bigger than normal, causes in reality The phenomenon of different degrees of water wall high temperature corrosion can still occur during the use of border.

The content of the invention

The purpose of this utility model seeks to provide a kind of boiler structure for having and avoiding water wall high temperature corrosion function, should Device coordinates fire air nozzle, a wind snout and overfire air port by designing adherent wind snout so that internal-combustion is more Fully, the reducibility gas excessive concentration such as carbon monoxide and hydrogen sulfide is avoided, while adherent wind energy avoids heat from being accumulated in inwall, So as to avoid the phenomenon of water-wall corrosion.

To achieve the above object, there is the boiler knot for avoiding water wall high temperature corrosion function designed by the utility model Structure, including boiler body, the boiler body have the burner hearth to be burnt in a manner of quadrangle tangential circle, and the burner hearth is rectangular shape Structure, and the angle between the two neighboring side wall of its surrounding is connected by swash plate transition, the surrounding side wall upper part of the burner hearth is opened It is in the adherent wind snout of transversely arranged arrangement provided with several；Along burner hearth central axial direction from upper on four angles of the burner hearth And it is lower offer several fire air nozzles, several wind snout and several plasma burner spouts successively, often An individual wind snout and the surface of plasma burner spout and underface are provided with several overfire air ports.

Further, the adherent wind snout is in that laterally a row or two arrangements are put, and often arranges the number of the adherent wind snout Measure as 4~6.

Further, the quantity for often arranging the adherent wind snout is 4.

Further, the quantity of fire air nozzle is 3~5 on each angle of the burner hearth, the quantity of a wind snout For 2~4, the quantity of plasma burner spout is 1~3.

Further, the quantity of fire air nozzle is 4 on each angle of the burner hearth, and the quantity of a wind snout is 3 Individual, the quantity of plasma burner spout is 2.

Yet further, the adherent wind snout, fire air nozzle, a wind snout and overfire air port respectively with the external world Independent air-supply arrangement connection.

Further, the air-supply arrangement is air blower.

Compared with prior art, the utility model has the advantage of：

First, the utility model coordinates fire air nozzle, a wind snout and Secondary Air to spray by designing adherent wind snout Mouthful so that internal-combustion is more abundant, avoids the reducibility gas excessive concentration such as carbon monoxide and hydrogen sulfide, while adherent wind energy Heat is avoided to be accumulated in inwall, so as to avoid the phenomenon of water-wall corrosion.

Second, adherent wind snout of the present utility model is in transversely arranged, the air draft of its air inlet in burner hearth surrounding side wall Direction and inboard wall of burner hearth horizontal direction parallel so that the wind that adherent wind snout enters, can be flowed along inwall, so as to subtract The degree of slow high temperature corrosion.

Third, improvement cost of the present utility model is low, simple in construction, practical.

Brief description of the drawings

Fig. 1 is a kind of main structure diagram for the boiler structure for having and avoiding water wall high temperature corrosion function；

Fig. 2 is the mplifying structure schematic diagram in burner hearth corner in Fig. 1；

In figure, boiler body 1, burner hearth 2, adherent wind snout 3, fire air nozzle 4, wind snouts 5, a plasma burners Spout 6, overfire air port 7.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments：

It is a kind of with the boiler structure for avoiding water wall high temperature corrosion function, including boiler body 1, boiler shown in figure Body 1 has the burner hearth 2 that is burnt in a manner of quadrangle tangential circle, and burner hearth 2 is rectangular shape structure, and the two neighboring side wall of its surrounding Between angle connected by swash plate transition, the surrounding side wall upper part of burner hearth 2 offers the patch that several are in transversely arranged arrangement Wall wind snout 3；On four angles of burner hearth 2 several burnout degrees are offered successively from top to bottom along the central axial direction of burner hearth 2 Spout 4, several wind snout 5 and several plasma burner spouts 6, each a wind snout 5 and plasma combustion The surface and underface of device spout 6 are provided with several overfire air ports 7.

In above-mentioned technical proposal, adherent wind snout 3 is in that laterally a row or two arrangements are put, and often arranges the number of adherent wind snout 3 Measure as 4~6, it is preferable that the quantity for often arranging adherent wind snout 3 is 4.The quantity of fire air nozzle 4 on each angle of burner hearth 2 For 3~5, the quantity of a wind snout 5 is 2~4, and the quantity of plasma burner spout 6 is 1~3, it is preferable that stove The quantity of fire air nozzle 4 is 4 on each angle of thorax 2, and the quantity of a wind snout 5 is 3, plasma burner spout 6 Quantity be 2.4, wind snouts 5 of fire air nozzle and overfire air port 7 are connected with extraneous independent air-supply arrangement respectively, Air-supply arrangement is air blower.Adherent wind snout 3 also connects independent air-supply arrangement, and adherent wind snout 3 is connected inside burner hearth 2, patch Wall wind snout 3 is structure of the air draft direction with inboard wall of burner hearth horizontal direction parallel of air inlet so that what adherent wind snout 3 entered It wind, can be flowed along inwall, the degree of high temperature corrosion can be slowed down.

From experiment：When not opening up adherent wind snout 3, the mean concentration of oxygen is 2.47% in burner hearth；Open up a row During adherent wind snout 3, the mean concentration of oxygen is 3.97% in burner hearth；When opening up the adherent wind snout 3 of two rows, oxygen in burner hearth Mean concentration is 4.29%, and the distribution of near wall region oxygen concentration is greatly improved, and this is created for reduction water wall high temperature corrosion Advantage；When not opening up adherent wind snout 3, the mean concentration of carbon monoxide is 5487ppm in burner hearth；Open up the adherent wind of a row During spout 3, the mean concentration of carbon monoxide is 2688ppm in burner hearth；When opening up the adherent wind snout 3 of two rows, an oxidation in burner hearth The mean concentration of carbon is 2209ppm, compared with not opening up adherent wind snout 3, when opening up adherent wind snout 3, and an oxygen near wall region Change concentration of carbon to be greatly lowered；When not opening up adherent wind snout 3, H in burner hearth₂S concentration is 468ppm；Open up the adherent wind of a row During spout 3, H in burner hearth₂S concentration about 314ppm or so, when opening up the adherent wind snout 3 of two rows, H in burner hearth₂S concentration 306ppm, by This understands H₂S concentration is greatly lowered.In summary, when opening up the adherent wind snout 3 of two rows, the mean concentration of oxygen increases in burner hearth Width is maximum, while carbon monoxide and H₂Mean concentration the biggest drop of S concentration.

It these are only specific embodiment of the present utility model, it is noted that any those skilled in the art exist In technical scope disclosed in the utility model, the change or replacement that can readily occur in should all be covered in guarantor of the present utility model Within the scope of shield.

Claims

1. a kind of have the boiler structure for avoiding water wall high temperature corrosion function, including boiler body (1), the boiler body (1) there is the burner hearth (2) to be burnt in a manner of quadrangle tangential circle, it is characterised in that：The burner hearth (2) is rectangular shape structure, and Angle between the two neighboring side wall of its surrounding is connected by swash plate transition；The surrounding side wall upper part of the burner hearth (2) offers Several are in the adherent wind snout (3) of transversely arranged arrangement；Along burner hearth (2) central axis side on four angles of the burner hearth (2) Fired to several fire air nozzles (4), several wind snout (5) and several plasmas are offered successively from top to bottom Burner spout (6), each wind snout (5) and the surface of plasma burner spout (6) and underface are respectively provided with There are several overfire air ports (7).

2. according to claim 1 have the boiler structure for avoiding water wall high temperature corrosion function, it is characterised in that：It is described Adherent wind snout (3) is in that laterally a row or two arrangements are put, and the quantity for often arranging the adherent wind snout (3) is 4~6.

3. according to claim 2 have the boiler structure for avoiding water wall high temperature corrosion function, it is characterised in that：Often arrange The quantity of the adherent wind snout (3) is 4.

4. having the boiler structure for avoiding water wall high temperature corrosion function according to claim 1 or 2 or 3, its feature exists In：The quantity of fire air nozzle (4) is 3~5 on each angle of the burner hearth (2), and the quantity of a wind snout (5) is 2~4 Individual, the quantity of plasma burner spout (6) is 1~3.

5. according to claim 4 have the boiler structure for avoiding water wall high temperature corrosion function, it is characterised in that：It is described The quantity of fire air nozzle (4) is 4 on each angle of burner hearth (2), and the quantity of a wind snout (5) is 3, plasma combustion The quantity of device spout (6) is 2.

6. according to claim 5 have the boiler structure for avoiding water wall high temperature corrosion function, it is characterised in that：It is described Adherent wind snout (3), fire air nozzle (4), a wind snout (5) and overfire air port (7) respectively with extraneous independent air-supply Device connects.

7. according to claim 6 have the boiler structure for avoiding water wall high temperature corrosion function, it is characterised in that：It is described Air-supply arrangement is air blower.