CN204213915U - A kind of CFBB - Google Patents

Abstract

The utility model provides a kind of CFBB, relate to Industrial Boiler equipment technical field, this CFBB comprises boiler body and scum pipe, fluidized bed board is provided with in boiler body, the top of fluidized bed board is combustion chamber, the below of fluidized bed board is boiler air compartment, fluidized bed board offers air-permeating hole, the below of boiler air compartment is the base plate of boiler body, fluidized bed board and base plate are equipped with through hole, scum pipe is through the through hole on base plate and fluidized bed board and combustion chamber, scum pipe coordinates with the via clearance on fluidized bed board, base plate is connected with gland, the outer peripheral face of scum pipe is provided with annular flange flange, gland is pushed down the lower surface of annular flange flange and is connected with base plate by scum pipe.The utility model solves the elongated problem causing itself and fluidized bed board and back plate connections to burst of scum pipe expanded by heating, and this CFBB is very easy to use, does not substantially need to safeguard the slag-draining device of boiler.

Description

A kind of CFBB

Technical field

The utility model relates to Industrial Boiler equipment technical field, particularly a kind of CFBB.

Background technology

CFBB is the boiler of a kind of high-efficiency low-pollution grown up on the basis of bubbling bed boiler (fluidized bed furnace), CFBB is made up of combustion chamber (burner hearth), boiler air compartment, circulating ash separator, fly ash loopback device, back-end surfaces, slag-draining device (mainly scum pipe) and auxiliary equipment etc. usually, has coal-fired wide adaptability, efficiency of combustion advantages of higher.

The scum pipe of existing CFBB adopts the base plate of the mode of welding and fluidized bed board and boiler body to link together mostly, when the volume comparatively large (scum pipe length is longer) of CFBB or fluidized bed board and baseplate temp difference larger time (temperature difference more than 900 degrees Celsius), the temperature difference of scum pipe and fluidized bed board and boiler body weld also can be very large, due to the reason that scum pipe expanded by heating is elongated, easily there is the situation that weld bursts open, usually need boiler to stop in production process again by welded together for the position of splitting, boiler uses very inconvenient, often need to safeguard slag-draining device.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of CFBB, and this CFBB is very easy to use, does not substantially need to safeguard slag-draining device.

In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of CFBB, comprise boiler body and scum pipe, fluidized bed board is provided with in described boiler body, the top of described fluidized bed board is combustion chamber, the below of described fluidized bed board is boiler air compartment, described fluidized bed board offers air-permeating hole, the below of described boiler air compartment is the base plate of boiler body, described fluidized bed board and base plate are equipped with through hole, described scum pipe is through the through hole on base plate and fluidized bed board and combustion chamber, described scum pipe coordinates with the via clearance on fluidized bed board, described base plate is connected with gland, the outer peripheral face of described scum pipe is provided with annular flange flange, described gland is pushed down the lower surface of annular flange flange and is connected with base plate by scum pipe.

Further, refractory seals parts are provided with between the inwall of the through hole on the outer wall of described scum pipe and base plate.

Further, the cross section of described gland is L-shaped, is equipped with elastomeric gasket between the lower surface of described gland and base plate and annular flange flange.

Preferably, described refractory seals parts are asbestos packing.

Preferably, described elastomeric gasket is polytetrafluoroethylene (PTFE) elastomeric pad.

The beneficial effect that the utility model obtains is: the CFBB that the utility model provides adopts gland scum pipe and base plate to be fixed together, because scum pipe coordinates with the via clearance on fluidized bed board, when scum pipe expanded by heating, scum pipe can in the past combustion chamber direction extend, thus solve the problem of splitting scum pipe junction, avoid in production process the situation that the boiler that stops carries out keeping in repair, this CFBB is very easy to use, when scum pipe is because only needing during high temperature failure to change scum pipe, substantially do not need to safeguard slag-draining device.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present utility model;

Reference numeral is:

1---boiler body 2---scum pipe 3---combustion chamber

4---boiler air compartment 11---fluidized bed board 12---base plates

13---refractory seals parts 21---gland 22---annular flange flange

23---elastomeric gasket 111---air-permeating hole.

Detailed description of the invention

For the ease of the understanding of those skilled in the art, be further described the utility model below in conjunction with embodiment and accompanying drawing, the content that embodiment is mentioned is not to restriction of the present utility model.

As shown in Figure 1, a kind of CFBB, comprise boiler body 1 and scum pipe 2, fluidized bed board 11 is provided with in boiler body 1, the top of fluidized bed board 11 is combustion chamber 3, the below of fluidized bed board 11 is boiler air compartment 4, fluidized bed board 11 offers air-permeating hole 111, the below of boiler air compartment 4 is the base plate 12 of boiler body 1, fluidized bed board 11 and base plate 12 are equipped with through hole, scum pipe 2 is communicated with combustion chamber 3 with the through hole on fluidized bed board 11 through base plate 12, scum pipe 2 coordinates with the via clearance on fluidized bed board 11, base plate 12 is connected with gland 21, the outer peripheral face of scum pipe 2 is provided with annular flange flange 22, gland 21 is pushed down the lower surface of annular flange flange 22 and is connected with base plate 12 by scum pipe 2.

In the above-described embodiments, the CFBB that the utility model provides adopts gland 21 scum pipe 2 and base plate 12 to be fixed together, because scum pipe 2 coordinates with the via clearance on fluidized bed board 11, when scum pipe 2 expanded by heating, scum pipe 2 can in the past combustion chamber 3 direction extend, thus solve the problem of splitting scum pipe junction, avoid in production process the situation that the boiler that stops carries out keeping in repair, this CFBB is very easy to use, when scum pipe 2 is because only needing during high temperature failure to be changed, substantially do not need to safeguard slag-draining device.

It should be noted that, above-mentioned gland 21 can be the gland of any one structure in prior art, as long as it can reach the object be pressed on by the flange 22 on scum pipe 2 on base plate 12.

Further, refractory seals parts 13 are provided with between the inwall of the through hole on the outer wall of scum pipe 2 and base plate 12.

Arranging refractory seals parts 13 between the inwall of the through hole on the outer wall and base plate 12 of scum pipe 2 can prevent wind in boiler air compartment 4 from the clearance leakage between scum pipe 2 and the through hole of base plate 12 out, ensure that the air pressure in boiler air compartment 4.

Further, the cross section of gland 21 is L-shaped, is equipped with elastomeric gasket 23 between the lower surface of gland 21 and base plate 12 and annular flange flange 22.

First, air-tightness between through hole that elastomeric gasket 23 can improve scum pipe 2 and base plate 12 further is all set between gland 21 and the lower surface of base plate 12 and annular flange flange 22, further ensure the air pressure in boiler air compartment 4, secondly, when scum pipe 2 thermal expansion amount is too large, originally the matched in clearance and between the through hole of fluidized bed board 11 is because when the external diameter of scum pipe 2 swells and becomes interference fit, scum pipe 2 cannot extend toward the direction of combustion chamber 3 again, when scum pipe 2 cannot again toward combustion chamber 3 direction extend time, direction toward base plate 12 is extended by it, because elastomeric gasket 23 has compressibility, now, the lower surface of annular flange flange 22 will increase elastomeric gasket 23 pressure, elastomeric gasket 23 is further compressed, thus realize scum pipe 2 and extend toward the direction of base plate 12, avoid the situation that the junction of scum pipe 2 and fluidized bed board 11 and base plate 12 bursts further.

Preferably, refractory seals parts 13 are asbestos packing.

Asbestos packing low price, good sealing effect and durable in use, can reduce the routine use cost of this CFBB as refractory seals parts 13 with asbestos packing.

Preferably, elastomeric gasket 23 is polytetrafluoroethylene (PTFE) elastomeric pad.

Polytetrafluoroethylene (PTFE) elastomeric pad only needs less bolt clipping forcee, just can form well sealing, simultaneously due to its high-low temperature resistant, stable physical property, polytetrafluoroethylene (PTFE) elastomeric pad is adopted both to ensure that the air-tightness of gland 21 and annular flange flange 22 and base plate 12 junction as elastomeric gasket 23, in turn ensure that the compressibility that elastomeric gasket 23 is good, also reduce the work changing elastomeric gasket 23, reduce the maintenance cost of boiler, make the use of boiler more convenient.

Above-described embodiment is the utility model preferably implementation, and in addition, the utility model can also realize by alternate manner, and under the prerequisite not departing from the technical program design, any apparent replacement is all within protection domain of the present utility model.

Claims (5)

1. a CFBB, comprise boiler body (1) and scum pipe (2), fluidized bed board (11) is provided with in described boiler body (1), the top of described fluidized bed board (11) is combustion chamber (3), the below of described fluidized bed board (11) is boiler air compartment (4), described fluidized bed board (11) offers air-permeating hole (111), the below of described boiler air compartment (4) is the base plate (12) of boiler body (1), it is characterized in that: described fluidized bed board (11) and base plate (12) are equipped with through hole, described scum pipe (2) is communicated with combustion chamber (3) with the through hole on fluidized bed board (11) through base plate (12), described scum pipe (2) coordinates with the via clearance on fluidized bed board (11), described base plate (12) is connected with gland (21), the outer peripheral face of described scum pipe (2) is provided with annular flange flange (22), described gland (21) is pushed down the lower surface of annular flange flange (22) and is connected with base plate (12) by scum pipe (2).

2. CFBB according to claim 1, is characterized in that: be provided with refractory seals parts (13) between the inwall of the through hole on the outer wall of described scum pipe (2) and base plate (12).

3. CFBB according to claim 1 and 2, it is characterized in that: the cross section of described gland (21) is L-shaped, between the lower surface of described gland (21) and base plate (12) and annular flange flange (22), be equipped with elastomeric gasket (23).

4. CFBB according to claim 2, is characterized in that: described refractory seals parts (13) are asbestos packing.

5. CFBB according to claim 3, is characterized in that: described elastomeric gasket (23) is polytetrafluoroethylene (PTFE) elastomeric pad.