CN103343957A

CN103343957A - Tube row device of heat-absorbing surface in horizontal flue of boiler

Info

Publication number: CN103343957A
Application number: CN2013102510822A
Authority: CN
Inventors: 党祺云
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-21
Filing date: 2013-06-21
Publication date: 2013-10-09

Abstract

A tube row device of the heat-absorbing surface in a horizontal flue of a boiler comprises a plurality of tube row sets, wherein the tube row sets are arranged inside the horizontal flue, and each single tube is horizontally arranged, and the inlet and the outlet of each tube row set are correspondingly communicated with a linkage box on the outer side of the horizontal flue respectively. The tube row sets are arranged in a single-way mode, or arranged in a multi-way mode by using coil tubes, or arranged symmetrically with respect to the central vertical surface in the axial direction of the horizontal flue, or arranged in a single-way, multi-way and symmetrical combining mode; by means of the tube row sets with the horizontally arranged single tubes, under the condition that oxide skins fall off unavoidably, the oxide skins are dispersed during falling off and accumulating, and the fact that the oxide skins are accumulated together because of gravity and other influences to cause blocking of some tubes in the tube row sets is avoided; therefore, accumulation of the oxide skins of all the tubes can tend to be stable and obtain similar situations, the oxide skins are evenly carried out of the tube rows by steam flow in starting and operating processes, maintaining difficulty is lowered, work efficiency and operation stability are improved, and overheat tube explosion caused by blocking of the tubes can be reduced or even avoided.

Description

Boiler horizontal gas pass internal heating surface pipe arranging device

Technical field

The invention belongs to boiler tube row heat exchange field, be specifically related to a kind of boiler horizontal gas pass internal heating surface pipe arranging device.

Background technology

Boiler is a kind of energy conversion, can outwards export steam, high-temperature water or the organic heat carrier with certain heat energy by its conversion.And the power conversion in the boiler takes place by the heat transmission, and in order to increase heat exchange area, shell boiler has all developed into tubular boiler.Large-scale station boiler in order to improve steam parameter, all is the tubular boiler that adopts the tube panel heat exchange, and boiler heating surface has evaporating heating surface and convection heating surface, is furnished with superheater and reheater in the convection heating surface.

Large-scale station boiler steam parameter height, particularly convection heating surface pipe superheater and reheater, because its operation hot soak condition, thereby tube wall can continuous oxidation form continuous oxide skin in the tube panel under the effect of high-temperature medium, this oxide skin is attached on the tube wall usually, being in operation continues to thicken but does not peel off, when it reaches certain thickness, and big when range of temperature, speed is fast, will peel off when frequency is big; Especially occur in the shutdown of unit and when starting, and load, when temperature and pressure changes greatly, oxide can strip down gradually, be deposited in bottom the boiler heating surface, when deposit quantity more for a long time, then can cause overtemperature of tube wall and cause booster.This type of leakage event has accounted for significant proportion in the station boiler accident, and since in the panel-pipe of heating surface oxide skin peel off and pile up that to cause overtemperature of tube wall booster unit outage be ubiquitous problem, also become the main hidden danger of the normal stable operation of unit.

What existing boiler horizontal gas pass internal heating surface pipe row adopted is that single pipe vertically arranges, realize the connection of multipass by elbow, utilize header to reach compiling of medium and distribute, and after oxide skin is peeled off in the pipe, will certainly concentrate the elbow inside that is deposited in the bottom backhaul to result in blockage, this also is to pile up the main cause that causes overtemperature tube burst by oxide skin, with existing pipe row's structure can't avoid piling up obstruction generation, can only safeguard by regular pipe detection or other detection means, avoid the generation of accident, but because pipe row quantity is huge, common maintenance can only be inspected by random samples, comprehensive judgement can't be made, accident potential can't be thoroughly eliminated; Full maintenance, the time cycle is long, and workload is big, influences the normal operation of boiler.

Summary of the invention

At the problems of the prior art, the invention provides a kind of concentrated accumulation that can avoid oxide skin, thereby avoid stopping up the boiler horizontal gas pass internal heating surface pipe arranging device that overtemperature tube burst takes place because of pipe.

For achieving the above object, technical scheme of the present invention is: comprise that many groups are arranged in the horizontal flue and single pipe is horizontally disposed pipe row group, the entrance and exit of pipe row group respectively with the corresponding connection of header that is arranged on the horizontal flue outside; Pipe row group is the one way setting, or adopts coiled pipe to be the multipass setting, or is along the axial middle vertical plane of horizontal flue and is symmetrical arranged, or adopts the mixing setting of one way, multipass and symmetry.

The arrangement of the relative flue gas flow direction of heating surface of described pipe row group is following current layout or counter-flow arrangement.

Described header is vertical the setting, and each layer pipe row group is connected with the distributing pipe of being drawn by the differing heights position of header.

The arrangement of the relative flue gas flow direction of heating surface of described pipe row group is to arrange perpendicular to flue gas flow direction.

Described header is for being horizontally disposed with, and each layer pipe row group connects with the radial distribution pipe of being drawn by the different axial locations of header.

Be provided be used to the headspace that blows ash between the described pipe row group.

Described pipe row group is fixedlyed connected with the column pipe beam that is arranged on top, horizontal flue outside by column pipe.

Described column pipe adopts water cooling tube or steam pipe.

Boiler horizontal gas pass internal heating surface pipe arranging device of the present invention, by the horizontally disposed pipe row group of single pipe, make and to avoid under the situation that oxide skin comes off, make peeling off and piling up dispersion of oxide skin, can not concentrate and be deposited in together owing to other influence such as gravity, cause the obstruction of indivedual pipes in the pipe row group; Thereby can make in each pipe the accumulation of oxide skin tend to be steady and situation similar, in startup and running, evenly carried out pipe row by vapor stream, reduced the difficulty of safeguarding greatly, operating efficiency and operation stability have been improved, the overtemperature tube burst that reduces even can avoid taking place because of the pipe obstruction.

Description of drawings

The schematic diagram that Fig. 1 adopts multipass to arrange for structure described in the example 1 of the present invention; 1a is front view, and 1b is vertical view.

Fig. 2 adopts symmetrically arranged schematic diagram for structure described in the example 1 of the present invention; 2a is front view, and 2b is vertical view.

The schematic diagram that Fig. 3 adopts multipass to arrange for structure described in the example 2 of the present invention; 3a is front view, and 3b is vertical view.

Fig. 4 adopts symmetrically arranged schematic diagram for structure described in the example 2 of the present invention; 4a is front view, and 4b is vertical view.

Fig. 5 mixes the schematic diagram that arranges for structure described in the example 2 of the present invention adopts; 5a is front view, and 5b is vertical view.

Among the figure: 1 is pipe row group, and 2 is header, and 3 is horizontal flue, and 4 is column pipe, and 5 is the column pipe beam.

The specific embodiment

Below in conjunction with example and accompanying drawing the present invention further is explained and illustrated.

Example 1

Referring to Fig. 1 and Fig. 2, the present invention includes many groups and be arranged in the horizontal flue 3 and single pipe is horizontally disposed pipe row and organizes 1, pipe row organize 1 entrance and exit respectively with the header 2 corresponding connections that are arranged on horizontal flue 3 outsides; Pipe row organize 1 and be the one way setting, or adopt coiled pipe to be the multipass setting, as among Fig. 1 b being two journey settings, or being along the axial middle vertical plane of horizontal flue 3 and being symmetrical arranged, and as being symmetrical arranged of three journeys among Fig. 2 b, or adopts the mixing setting of one way, multipass and symmetry.Because pipe row organizes single pipe in 1 and is and is horizontally disposed with, in the pipe that drops thereunder that therefore only can be corresponding when oxide skin is peeled off, can not carry out secondary motion and cause the concentrated accumulation obstruction of oxide skin, so can avoid the overtemperature tube burst that causes because of obstruction.

Wherein, shown in Fig. 1 a and Fig. 2 a, the arrangement that pipe row organizes 1 the relative flue gas flow direction of heating surface is following current layout or counter-flow arrangement, and different pipe rows organizes 1 can adopt different arrangements, can a part of following current arrange another part counter-flow arrangement; So arrangement namely the row of pipe organize 1 and be and be arranged in order the horizontal tube panel of formation from top to bottom, and tube panel extends along horizontal flue 3 and arranges, and organizes the headspace that is provided with between 1 be used to blowing ash pipe row; Headspace can organize that 1 spacing, segmentation are arranged or other modes realize by changing adjacent tubes row.

Wherein, Fig. 1 and Fig. 2, header 2 is vertical the setting, each layer pipe row organize 1 with the radial distribution pipe connection of being drawn by the different axial locations of header 2, the tube connector row header of organizing 1 entrance and exit can be positioned at the outer the same side of horizontal flue 3 respectively as shown in Figure 2, also can organize 1 flow arrangement needs as shown in fig. 1 according to horizontally disposed pipe row and lay respectively at horizontal flue 3 left side and right side outward, or any suitable position outside the horizontal flue 3; Pipe row organize 1 by column pipe 4 be arranged on the horizontal flue 3 column pipe beam 5 above outside and fixedly connected, shown in Fig. 1 a and Fig. 2 a; Column pipe 4 can adopt water cooling tube or steam pipe.

Example 2

Referring to Fig. 3, Fig. 4 and Fig. 5, the present invention includes many groups and be arranged in the horizontal flue 3 and single pipe is horizontally disposed pipe row and organizes 1, pipe row organize 1 entrance and exit respectively with the header 2 corresponding connections that are arranged on horizontal flue 3 outsides; Pipe row organizes 1 and is the one way setting, or adopt coiled pipe to be the multipass setting, as among Fig. 3 a being two journey settings, or be along the axial middle vertical plane of horizontal flue 3 and be symmetrical arranged, as being symmetrical arranged of three journeys among Fig. 4 a, or adopt one way, multipass and symmetrical mixing setting, as the mixing setting of one way symmetry and two journeys among Fig. 5 a.Because pipe row organizes single pipe in 1 and is and is horizontally disposed with, in the pipe that drops thereunder that therefore only can be corresponding when oxide skin is peeled off, can not carry out secondary motion and cause the concentrated accumulation obstruction of oxide skin, so can avoid the overtemperature tube burst that causes because of obstruction.

Wherein, shown in Fig. 3 b, Fig. 4 b and Fig. 5 b, pipe row organizes the arrangement of 1 the relative flue gas flow direction of heating surface for to arrange perpendicular to flue gas flow direction, namely the row of pipe organizes 1 and is from front to back to extend along horizontal flue 3 successively and arranges, be vertical layout on the version, and organize the headspace that is provided with between 1 be used to blowing ash pipe row; Headspace can organize that 1 spacing, segmentation are arranged or other modes realize by changing adjacent tubes row.

Wherein, Fig. 3, Fig. 4 and Fig. 5, header 2 is for being horizontally disposed with, each layer pipe row organize 1 with the radial distribution pipe connection of being drawn by the different axial locations of header 2, the tube connector row header of organizing 1 entrance and exit can be positioned at the outer the same side of horizontal flue 3 respectively as shown in Figures 4 and 5, as shown in Fig. 3 and Fig. 5, also can organize 1 flow arrangement needs according to horizontally disposed pipe row and lay respectively at horizontal flue 3 left side and right side outward, or any suitable position outside the horizontal flue 3; Pipe row organize 1 by column pipe 4 be arranged on the horizontal flue 3 column pipe beam 5 above outside and fixedly connected, shown in Fig. 3 a and Fig. 4 a and Fig. 5 a; Column pipe 4 can adopt water cooling tube or steam pipe.

Claims

1. boiler horizontal gas pass internal heating surface pipe arranging device, it is characterized in that, comprise that many groups are arranged in the horizontal flue (3) and single pipe is horizontally disposed pipe row group (1), the entrance and exit of pipe row's group (1) respectively with the corresponding connection of header (2) that is arranged on horizontal flue (3) outside; Pipe row group (1) is the one way setting, or adopts coiled pipe to be the multipass setting, or is along the axial middle vertical plane of horizontal flue (3) and is symmetrical arranged, or adopts the mixing setting of one way, multipass and symmetry.

2. boiler horizontal gas pass internal heating surface pipe arranging device according to claim 1 is characterized in that, the arrangement of the relative flue gas flow direction of heating surface of described pipe row group (1) is following current layout or counter-flow arrangement.

3. boiler horizontal gas pass internal heating surface pipe arranging device according to claim 2 is characterized in that, described header (2) is vertical the setting, and each layer pipe row's group (1) is connected with the distributing pipe of being drawn by the differing heights position of header (2).

4. boiler horizontal gas pass internal heating surface pipe arranging device according to claim 1 is characterized in that, the arrangement of the relative flue gas flow direction of heating surface of described pipe row group (1) is to arrange perpendicular to flue gas flow direction.

5. boiler horizontal gas pass internal heating surface pipe arranging device according to claim 4 is characterized in that, described header (2) is for being horizontally disposed with, and each layer pipe row's group (1) connects with the radial distribution pipe of being drawn by the different axial locations of header (2).

6. boiler horizontal gas pass internal heating surface pipe arranging device according to claim 1 is characterized in that, is provided be used to the headspace that blows ash between the described pipe row group (1).

7. according to any described boiler horizontal gas pass internal heating surface pipe arranging device among the claim 1-6, it is characterized in that described pipe row group (1) is fixedlyed connected with the column pipe beam (5) that is arranged on the outside top of horizontal flue (3) by column pipe (4).

8. boiler horizontal gas pass internal heating surface pipe arranging device according to claim 7 is characterized in that, described column pipe (4) adopts water cooling tube or steam pipe.