CN211526396U

CN211526396U - Convection bank structure for industrial water tube boiler

Info

Publication number: CN211526396U
Application number: CN201922278689.5U
Authority: CN
Inventors: 张咏; 李志敏; 蒙晓光
Original assignee: GUANGZHOU BOLE BOILER CO LTD
Current assignee: GUANGZHOU BOLE BOILER CO LTD
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-09-18
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a convection bank structure for industrial water pipe boiler, including the boiler body, this internal drum and lower drum of being provided with of boiler, go up drum and lower drum and set up from top to bottom, be provided with the vertical convection bank of arranging between the upper and lower drum, and set up the convection bank between upper drum and lower drum and be the staggered arrangement, the ratio of the diameter D of the horizontal pitch S1 and the tube bank of the convection bank of staggered arrangement is 2.6-2.9. The convection bank structure can effectively improve the heat exchange efficiency of the convection heating surface of the boiler and is not easy to accumulate dust.

Description

Convection bank structure for industrial water tube boiler

Technical Field

The utility model relates to a boiler technical field especially relates to a convection bank structure for industrial water tube boiler.

Background

The main heating surface on the industrial biomass-fired water tube boiler body is divided into two parts: a radiant heating surface and a convection heating surface. The numerical value of the flue gas cross section tube pitch ratio sigma 1 which is S1/D (S1 is the transverse pitch of the tube bundle, D is the diameter of the tube bundle) has important influence on the heat exchange condition and the ash deposition degree of the convection heating surface. In the low-medium pressure industrial water tube boiler with the evaporation capacity of 2t/h to 6t/h in the market, the convection heating surface tube bundles are arranged in line, but the boiler tube bundles arranged in line have larger structure and serious dust deposition, so that the heat exchange coefficient is reduced, and the absorption of high-temperature flue gas heat is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a convection bank structure for an industrial water tube boiler, which can improve the heat exchange efficiency of the convection heating surface of the boiler and prevent dust deposition.

The purpose of the utility model is realized by adopting the following technical scheme:

the utility model provides a convection bank structure for industrial water pipe boiler, includes the boiler body, this internal drum and the drum down of being provided with of boiler, go up drum and the setting from top to bottom of drum down, go up and be provided with the convection bank of vertical arranging between drum and the drum down, and set up the convection bank between last drum and the drum down and be the staggered arrangement, the ratio of the diameter D of the horizontal pitch S1 of the convection bank of staggered arrangement and tube bank is 2.6-2.9.

Further, the convection bank is connected with the upper drum and the lower drum in a welding mode.

Furthermore, a first sewage draining valve is arranged on the upper drum.

Further, the lower drum is provided with a second drain valve.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the convection bank of the utility model adopts the staggered arrangement mode, compared with the in-line arrangement mode, more banks can be arranged, so that the structure of the whole heating surface is more compact, the resistance of the flue gas is increased, the disturbance of the flue gas is increased, the back surface of the bank can be swept by the flue gas, the heat release coefficient of the flue gas is improved, the heat exchange efficiency of the convection heating surface is improved, and the dust is not easy to accumulate; meanwhile, the pitch ratio of the flue gas cross section tubes is 2.6-2.9 by adjusting the transverse pitch S1 of the convection heating surface tube bundle. According to the thermal calculation, when the pitch ratio of the flue gas cross section tubes is 2.6-2.9, the heat exchange efficiency of the heating surfaces arranged in a staggered mode and the effect of optimal matching of the heat exchange efficiency and the dust deposition difficulty are achieved.

Drawings

FIG. 1 is one of the schematic views of a convection bank structure for an industrial water tube boiler according to the present invention;

FIG. 2 is a second schematic view of a convection bank structure for an industrial water tube boiler according to the present invention;

FIG. 3 is a schematic view of the transverse pitch of the convection bank;

in the figure: 1. putting the boiler barrel on the boiler; 2. discharging the boiler barrel; 3. a convection bank.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only 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 therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "one," "another," and the like are used to distinguish similar elements, and these terms and other similar terms are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. Corresponding reference numerals are used throughout the figures to indicate corresponding or corresponding elements (e.g., elements identified as "1 XX" and "2 XX" are structurally identical and functionally similar).

As shown in fig. 1-3, for the utility model provides a pair of convection bank 3 structure for industrial water tube boiler, a serial communication port, including the boiler body, this internal drum 1 and lower drum 2 of being provided with of boiler, go up drum 1 and lower drum 2 and set up from top to bottom, be provided with the convection bank 3 of vertical arrangement between last drum 1 and the lower drum 2, and set up the convection bank 3 between last drum 1 and lower drum 2 and be the staggered arrangement, the ratio of the horizontal pitch S1 of the convection bank 3 of staggered arrangement and the diameter D of convection bank 3 is 2.6-2.9.

In the present embodiment, the direction indicated by the arrow in fig. 2 and 3 is the flue gas flow direction. The utility model discloses a change the convection current heating surface of industry burning living beings water pipe boiler and arrange the form, change the stagger arrangement into by the sequence, compare the mode that the sequence was arranged, more tube bundles can be arranged to the stagger arrangement, make the structure of whole heating surface more compact, just so increaseed the hindering of flue gas receiving, make the flue gas disturbance increase, and the tube bundle back also can receive the flue gas to sweep, improve the exothermic coefficient of flue gas, thereby improve the heat exchange efficiency of convection current heating surface, the heat exchange efficiency who makes this heat exchange surface improves 10% to 20%, and be difficult to the deposition. Meanwhile, the transverse pitch S1 of the convection heating surface tube bundle is adjusted, so that fly ash is easier to settle, fly ash accumulation is effectively avoided, and the pitch ratio of the cross section tubes of the flue gas is 2.6-2.9. According to the thermal calculation, when the pitch ratio of the flue gas cross section tubes is 2.6-2.9, the heat exchange efficiency of the heating surfaces arranged in a staggered mode and the effect of optimal matching of the heat exchange efficiency and the dust deposition difficulty are achieved.

Note that the direction indicated by the arrow in fig. 3 is a smoke flow direction.

Preferably, the convection bank 3 is connected to the upper drum 1 and the lower drum 2 by welding.

Preferably, the upper drum 1 is provided with a first drain valve, and the lower drum 2 is provided with a second drain valve.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a convection bank structure for industrial water tube boiler, its characterized in that, includes the boiler body, is provided with drum and lower drum in the boiler body, upper drum and lower drum set up from top to bottom, be provided with the convection bank of vertical arrangement between upper drum and the lower drum, and set up the convection bank between upper drum and lower drum and be the staggered arrangement, the ratio of the diameter D of the horizontal pitch S1 and the tube bank of the convection bank of staggered arrangement is 2.6-2.9.

2. A convection bank structure for an industrial water tube boiler in accordance with claim 1, wherein said convection bank is connected with the upper drum and the lower drum by welding.

3. A convection bank structure for an industrial water tube boiler in accordance with claim 1, wherein said upper drum is provided with a first drain valve.

4. A convection bank structure for an industrial water tube boiler in accordance with claim 1, wherein said lower drum is provided with a second blowoff valve.