CN203349260U

CN203349260U - Pitch structure of low-temperature-segment super-heater tube bank

Info

Publication number: CN203349260U
Application number: CN 201320270034
Authority: CN
Inventors: 龙吉生; 朱晓平; 黄洁; 石剑菁; 瞿兆舟; 张艳平; 王春风; 严梦帆; 董文芳
Original assignee: Shanghai SUS Environment Co Ltd
Current assignee: Shanghai SUS Environment Co Ltd
Priority date: 2013-05-17
Filing date: 2013-05-17
Publication date: 2013-12-18
Anticipated expiration: 2023-05-17

Abstract

The utility model relates to a pitch structure of a low-temperature-segment super-heater tube bank, and belongs to the field of garbage incineration. The diameter of the low-temperature-segment super-heater tube bank is d, the horizontal pitch d1 of a super-heater heat exchange face tube system is larger than or equal to d+65mm, and the longitudinal pitch d2 of a heat exchange face tube system parallel to the flowing direction of gas is larger than or equal to 100mm. By means of the pitch structure, the flowing speed of flue gas at the tail portion of a furnace can be lowered, the flowing speed of the flue gas at the tail portion of the low-temperature-segment super-heater is effectively controlled within the reasonable range of 3-6m/s, abrasion of a super-heater heat exchange face due to dust grains in the flue gas at the tail portion of the furnace is reduced, and the service life of the super-heater is prolonged by 50%.

Description

A kind of pitch structure of low-temperature zone superheater bank

Technical field

The utility model relates to the waste incineration field, especially the low-temperature zone superheater in the burning city domestic garbage treatment facility.

Background technology

The shortcoming that complicated component, combustion heat value are low, ash content is larger of domestic waste, easily produce wearing and tearing and fouling phenomenon to the superheater pipe in burning boiler equipment, thereby reduce the service life of superheater.

The applicant is published for the high temperature section superheater, and the superheater that steam exit temperature is greater than 320 ℃ proposes the Chinese patent that name is called " a kind of pitch structure of high temperature superheater tube bank " publication number CN202532446U.But this patent is not less than the pitch structure proposition solution of the low-temperature zone superheater of 320 ℃ to steam exit temperature.

For the flow velocity of effectively controlling boiler tail flue gas, reduce the adhesion property of flying dust in tail flue gas, and the consideration of the factors such as economy of manufacturing cost, superheater bank transverse pitch and the longitudinal pitch structure that need to be less than 320 degree to vapor (steam) temperature are improved.

Summary of the invention

The purpose of this utility model is to propose superheater bank transverse pitch and the longitudinal pitch structure that a kind of vapor (steam) temperature is less than 320 degree, weaken the adhesion property of flying dust in tail flue gas with rational flue gas flow rate, thereby reduce the generation of dust, dust stratification arch formation on the superheater heat-transfer surface, avoided the harmful effect of the viscosity dust heat exchanging usefulness in the flue gas.

Concrete technical scheme of the present utility model is:

A kind of pitch structure of low-temperature zone superheater bank, low-temperature zone superheater tube beam diameter is d, and the transverse pitch d1 of superheater heat-transfer surface piping is more than or equal to d+ 65 mm, and the longitudinal pitch d2 of the heat-transfer surface piping parallel with the flow of flue gas direction is more than or equal to 100 mm.

The superheater of the utility model structure, can reduce the flow velocity of boiler tail flue gas, make effectively to be controlled in the zone of reasonableness of 3～6 m/s by the tail flue gas flow velocity of low-temperature zone superheater, thereby the wearing and tearing of dust-laden particle to the superheater heat-transfer surface in the minimizing boiler tail flue gas, the service life of prolongation superheater.

The accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

The specific embodiment

As shown in Figure 1, a kind of pitch structure of low-temperature zone superheater bank, low-temperature zone superheater tube beam diameter is d, when the steam exit temperature of low-temperature zone superheater is less than 320 ℃, the transverse pitch d1 of superheater heat-transfer surface piping is more than or equal to d+ 65 mm, and the longitudinal pitch d2 of the heat-transfer surface piping parallel with the flow of flue gas direction is more than or equal to 100 mm.

After testing, the utility model can reduce the flow velocity of boiler tail flue gas, make effectively to be controlled in the zone of reasonableness of 3～6 m/s by the tail flue gas flow velocity of low-temperature zone superheater, thereby the wearing and tearing of dust-laden particle to the superheater heat-transfer surface in the minimizing boiler tail flue gas, the service life 50% of prolongation superheater.

Claims

1. the pitch structure of a low-temperature zone superheater bank, low-temperature zone superheater tube beam diameter is d, it is characterized in that, the transverse pitch d1 of superheater heat-transfer surface piping is more than or equal to d+ 65 mm, and the longitudinal pitch d2 of the heat-transfer surface piping parallel with the flow of flue gas direction is more than or equal to 100 mm.