CN203131786U

CN203131786U - Convection heated device of yellow-phosphorus-tail-gas burning boiler

Info

Publication number: CN203131786U
Application number: CN 201320050989
Authority: CN
Inventors: 康立; 张红卫; 吴淑娟; 刘璟
Original assignee: XI'AN XINHUAN ENERGY CO Ltd
Current assignee: XI'AN XINHUAN ENERGY CO Ltd
Priority date: 2013-01-30
Filing date: 2013-01-30
Publication date: 2013-08-14
Anticipated expiration: 2023-01-30

Abstract

The utility model relates to a convection heated device of a yellow-phosphorus-tail-gas burning boiler. Currently, waste heat boilers are matched with yellow-phosphorus-tail-gas production lines by several boiler manufacturing companies in domestic, but the waste heat boilers are rarely operated successfully and stably. Most of the waste heat boilers are corroded and perforated and pipes are burst just in a few months, a whole boiler is forced to be scraped, and huge economic losses are caused. The convection heated device of the yellow-phosphorus-tail-gas burning boiler comprises a cuboid convection bank, an upper boiler barrel and a lower boiler barrel are arranged at the upper end and the lower end of the convection bank, and the convection bank is divided into a left stage and a right stage through a membrane type wall. The convection heated device of the yellow-phosphorus-tail-gas burning boiler can fulfill the fact that heat generated by burning of special fuel of yellow phosphorus tail gas in a boiler can be completely absorbed, and the purpose of the rated evaporation amount of the boiler is achieved.

Description

A kind of convection current heating device that fires the yellow phosphoric tail gas boiler

Technical field

The utility model relates to a kind of convection current heating device that fires the yellow phosphoric tail gas boiler.

Background technology

China is phosphorus production big country, and phosphorus production enterprise is the highly energy-consuming rich and influential family, will produce the tail gas that a large amount of height contains CO in the phosphorus production, and one ton of yellow phosphorus of every production will by-product 2500～3000m ³Tail gas, in the tail gas content of CO generally all more than 80%, like this huge tail gas amount, and at present in these enterprises the tail gas 80% or more all be directly to enter in the atmosphere, caused the very big energy, the waste of resource and serious environmental pollution.Along with implementing and reinforcement of Environment Protection Policy, tail gas recycle is utilized imperative, and is related to the survival and development of enterprise.The yellow phosphoric tail gas basic reason that do not have well to recycle is tail gas recycle purification techniques complexity for many years, and the big and boiler dedicated operation stability of yellow phosphoric tail gas of investment is not resolved.At present domestic have boiler manufacturing company of several family be the yellow phosphoric tail gas production line supporting waste heat boiler, but successful stable operation is seldom.Major part is all at short some months internal corrosion perforation booster, and whole boiler is forced to scrap and causes enormous economic loss.My company is devoted to the purification of yellow phosphoric tail gas and the research-and-development activity boiler dedicated to yellow phosphoric tail gas always in recent years.We sum up the failure experience of other producers, design the boiler dedicated and parts of yellow phosphoric tail gas voluntarily.

The utility model content

The purpose of this utility model provides a kind of convection current heating device that fires the yellow phosphoric tail gas boiler, and it can satisfy this specific fuel of the yellow phosphoric tail gas heat that produces that burns and is absorbed fully in boiler, realize the purpose of boiler rating.

For achieving the above object, the technical scheme that the utility model provides is: a kind of convection current heating device that fires the yellow phosphoric tail gas boiler, comprise the convection bank of cuboid, it is characterized in that: the two ends up and down of described convection bank are provided with upper drum and lower drum, and described convection bank is divided into left and right sides two-stage by membrane wall.

Compared with prior art, the utility model has the advantages that: the utility model is in the yellow phosphoric tail gas power generation project, development and Design voluntarily, this convection bank is divided into 2 grades, the pipe row of outermost two combs and 1,2 grade of boundary all adopts membrane wall structure, saved a large amount of high price flame-proof thermal insulation materials, and sealing is fine; The bottom of convection bank simultaneously is provided with deflector, and corrosive medium is to the corrosion of convection bank when having avoided low temperature or blowing out.

Description of drawings

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

Fig. 2 is the utility model vertical view;

Description of reference numerals: 1-upper drum, 2-convection bank, 3-lower drum, 4-membrane wall.

The specific embodiment

Referring to Fig. 1 and Fig. 2: a kind of convection current heating device that fires the yellow phosphoric tail gas boiler, comprise the convection bank 2 of cuboid, the two ends up and down of described convection bank 2 are provided with upper drum 1 and lower drum 3, and described convection bank 2 is divided into left and right sides two-stage by membrane wall 4.

The utility model monnolithic case is cuboid; be arranged in the afterbody of boiler; as back-end surfaces; high-temperature flue gas washes away heat exchange to the utility model; then heat is passed to the interior medium of pipe by pipe; the effect of down-comer is being served as in the one-level convection bank of low-temperature space; the effect of tedge is being served as in the secondary convection bank of high-temperature region; cold water enters lower drum 3 from top to bottom by the low-temperature space pipe; enter the secondary convection tube of high-temperature region after mixed through carbonated drink in lower drum; form an inner natural cycle system, deflector device is being undertaken the effect that prevents low temperature sulfur corrosion and low temperature phosphorus corrosion in the yellow phosphoric tail gas, the operation of protection boiler long-term security.

Owing to contain certain corrosive impurity P in the yellow phosphoric tail gas ₄, H ₂S etc. have extremely strong corrosion to heating surface, and it is most important therefore to carry out low-temperature corrosion protection on the basis that guarantees enough heat outputs.

Claims

1. convection current heating device that fires the yellow phosphoric tail gas boiler, comprise the convection bank (2) of cuboid, it is characterized in that: the two ends up and down of described convection bank (2) are provided with upper drum (1) and lower drum (3), and described convection bank (2) is divided into left and right sides two-stage by membrane wall (4).