CN205332170U

CN205332170U - A over heater samming device for msw incineration boiler

Info

Publication number: CN205332170U
Application number: CN201520957124.9U
Authority: CN
Inventors: 周晓; 蔡文钢; 陈金火; 郝小波; 龚俊
Original assignee: China Western Power Industrial Co Ltd
Current assignee: China Western Power Industrial Co Ltd
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2016-06-22
Anticipated expiration: 2025-11-26

Abstract

The utility model discloses an over heater samming device for msw incineration boiler, collection case in the middle of an import is collected case, an export collection case and is located import collection case and export the several between the collection case, its characterized in that: the collection case be the even number in the middle of the several, in the middle of the several collection case in proper order two liang a set of, every inter block two in the middle of the collection casees manage associatively through several criss -cross sammings, the utility model discloses enable each guan wen of over heater and become more and more balanced, can prevent that the pipe high temperature from causing accelerated corrosion and the booster, do benefit to the operation steady in a long -term of boiler.

Description

Superheater temperature equalization system for garbage burning boiler

Technical field

This utility model relates to a kind of superheater temperature equalization system, especially for the superheater temperature equalization system of garbage burning boiler。

Background technology

Entering 21 century, along with living standards of the people improve, the quantity of refuse of generation is also increasing, and many big cities have formed the quagmire surrounded by rubbish, and process and the handling problems of rubbish are put in face of us。And burning electricity generation is to process the maximally effective way of domestic waste, not only can reach the purpose of at utmost volume reduction, and flue gas can also reach the environmental protection standard of national regulation after treatment, secondary pollution will not be caused, the heat energy that waste incineration discharges can also be used, reduce the consumption that makes of coal, reduce carbon emission。Waste incineration and generating electricity is the available sources of a kind of environmental protection energy。

Containing substantial amounts of chlorine element in house refuse, simultaneously possibly together with elements such as a considerable amount of K, Na, S, their incineration ashes has very strong corrosivity。High temperature corrosion in Refuse Incineration Process occurs mainly in superheater area, is mainly caused by the chlorine element in fuel。Chlorine element plays the role of catalyst in whole chemical reaction chain。In garbage burning boiler, metal pipe-wall is simply by the presence of pollutant, wherein just contain chlorine element, and between the high temperature corrosion that chlorine element causes and heating surface tube wall temperature, there is tight association, increase along with tube wall temperature, corrosion of metal speed is also accelerated, and heating surface tube wall temperature to be in high temperature corrosion during 400-700 DEG C of temperature province fastest, increase in geometry level；Even if the significantly high corrosion rate of tube wall temperature is also very slow when tube wall is smooth。There is many low melting points in the product of waste incineration, they have and stronger stick characteristic, so being inevitable outcome with sticking in flow of flue gas process on heating surface metal pipe-wall。And at present vapor (steam) temperature is generally about 400 DEG C in incinerator high temperature overheater, heated tubular tube wall temperature is easily in corrosion region, and superheater tube interest belong to outside wall temperature with its in medium temperature, flow velocity etc. relevant。

At present conventional superheater, including an import header, outlet header, the several intermediate headers being located between import header and outlet header, couples several parallel pipes of corresponding two intermediate headers；During use, steam is introduced into import header, repeats the superheater tube and intermediate header that enter several superheaters, outlet header discharges；In superheater tube, steam is heated, due to foozle, it is impartial that material behaviors etc. cannot be completely secured in every superheater tube steam flow, flow velocity is balanced, therefore part superheater tube causes local location tube wall temperature high owing to steam flow rate is relatively low, its vapor (steam) temperature deviation can superposition gradually, when steam enters intermediate header, the steam with the temperature difference cannot be mixed by parallel pipe uniformly, cause that the temperature difference is more long-pending more big, cause heating surface tube localized metal temperatures relatively other regions high, and deviation is bigger, this regional area high temperature corrosion is promoted to accelerate, the phenomenon of superheater tubes burst finally occurs, the operation steady in a long-term of boiler cannot be ensured。

Utility model content

Technical problem for above-mentioned existence, this utility model provides a kind of superheater temperature equalization system for garbage burning boiler, it can make each portion Guan Wen of superheater tend to balanced, can prevent that tube temperature is too high causes accelerated corrosion and booster, is beneficial to the operation steady in a long-term of boiler。

In order to achieve the above object, superheater temperature equalization system for garbage burning boiler of the present utility model, including an import header, an outlet header and be located at the several intermediate headers between import header and outlet header, it is characterized in that: described several intermediate headers are even number, several intermediate headers between two one group successively, often two intermediate headers in group are connected by the samming pipe of several intersections。

Two intermediate headers with group are coupled by this utility model by the samming pipe of several intersections, it is more conducive in intermediate header steam is uniform, make each portion Guan Wen of superheater tend to balanced, can prevent that tube temperature is too high causes accelerated corrosion and booster, be beneficial to the operation steady in a long-term of boiler。

Preferred as one, couple several samming pipes of two intermediate headers between two a group successively, with two samming pipe cross-join of group with two intermediate headers of group；Length and the height of samming pipe can be reduced, not only save cost but also be easy to manufacture。

In sum, this utility model can make each portion Guan Wen of superheater tend to balanced, can prevent that tube temperature is too high causes accelerated corrosion and booster, is beneficial to the operation steady in a long-term of boiler。

Accompanying drawing explanation

Fig. 1 is the schematic diagram of this utility model embodiment。

Fig. 2 is the top view of Fig. 1。

Fig. 3 is I place's partial enlarged drawing of Fig. 1。

Fig. 4 is the top view of Fig. 3。

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described in further detail。

As shown in Figures 1 to 4, this is used for the superheater temperature equalization system of garbage burning boiler, including 1, outlet header 2 of an import header and be located at eight intermediate headers 3 between import header 1 and outlet header 2, eight intermediate headers 3 between two one group successively, often it is provided with eight samming pipes 4 between two intermediate headers 3 in group, eight samming pipes 4 between two one group successively, with two samming pipe 4 cross-join of group with two intermediate headers 3 of group；

This utility model will be coupled with two intermediate headers 3 of group by the samming pipe 4 of several intersections, it is more conducive in intermediate header 3 steam is uniform, make each portion Guan Wen of superheater tend to balanced, can prevent that tube temperature is too high causes accelerated corrosion and booster, be beneficial to the operation steady in a long-term of boiler；By two contiguous samming pipe 4 length reducing samming pipe 4 arranged in a crossed manner and height, not only save cost but also be easy to manufacture。

Claims

1. the superheater temperature equalization system for garbage burning boiler, including an import header, an outlet header and be located at the several intermediate headers between import header and outlet header, it is characterized in that: described several intermediate headers are even number, several intermediate headers between two one group successively, often two intermediate headers in group are connected by the samming pipe of several intersections。

2. the superheater temperature equalization system for garbage burning boiler according to claim 1, it is characterised in that: couple several samming pipes of two intermediate headers between two a group successively, with two samming pipe cross-join of group with two intermediate headers of group。