CN201582789U

CN201582789U - Afterheat boiler steam drum

Info

Publication number: CN201582789U
Application number: CN2009202884410U
Authority: CN
Inventors: 丁学明; 许岩; 张天成; 李军; 杨雷; 丁长杰
Original assignee: FUSHUN PETROLEUM MACHINERY Co Ltd
Current assignee: FUSHUN PETROLEUM MACHINERY Co Ltd
Priority date: 2009-12-28
Filing date: 2009-12-28
Publication date: 2010-09-15
Anticipated expiration: 2019-12-28

Abstract

The utility model relates to an afterheat boiler steam drum, which consists of an ascending tube, a steam drum body, an oval seal head, a supporting base, a descending tube and a drum internal device. The supporting base utilizes a saddle type supporting base, and all components forming the steam drum are connected into an integral module. A deforming device is utilized in a secondary separation device inside the steam drum. The saddle type supporting base is utilized to support the steam drum so as to overcome difficult problems that a traditional steam drum is difficult in supporting and hoisting, and the deforming device is utilized inside the separation device inside the steam drum so as to increase quality of steam. The afterheat boiler steam drum can be widely applied to industries with high steam quantity and high smoke temperature, such as petrochemistry, chemical waste treatment, catalytic cracking and the like.

Description

A kind of waste heat boiler drum

One, technical field

The utility model belongs to the waste heat boiler equipment technical field, is specifically related to the drum in the waste heat boiler.

Two, background technology

Drum is one of main parts in waste heat boiler.It is the connection hinge of heating in the boiler, evaporation, overheated these three processes.Traditional drum supports usually or is suspended on the crossbeam of boiler steelframe.When drum adopts supporting way, generally have roller support at the drum bearing; When drum adopts sus-pension, generally be provided with the drum suspension bracket, on suspension ring, be provided with upper and lower two slip-knots, increased the complexity of structure of boiler barrel.The inner first separation device of tradition drum does not have Despumation device, and the secondary separation device adopts even vapour top board, and the perforate aperture is bigger on the plate, water droplet is mixed enter superheater in saturated vapor, causes the superheater tube wall temperature to raise and burns out; Steam-water separation effect is undesirable, can't guarantee steam quality.

Three, summary of the invention

The purpose of this utility model just provide a kind of simple in structure, can guarantee boiler operatiopn safety, improve the waste heat boiler drum of steam quality.

The technical solution adopted in the utility model is: the waste heat boiler drum is made up of tedge, boiler barrel cylinder, ellipse head, bearing, down-comer and drum internals etc.Bearing of the present utility model adopts saddle support, and all parts of forming drum connect into an integral module.Steam water interface in the economizer, the water separator in drum can separate the water droplet of saliferous in the steam, and that isolated steam is admitted to superheater is overheated, becomes superheated steam.

Drum support to adopt saddle support, has overcome traditional drum and has propped up and hang problem of difficult, and the inner secondary separation device of drum adopts antifoam package, has improved steam quality.Can be widely used in the industries that quantity of steam is big, the cigarette temperature is high such as petrochemical industry, the useless processing of chemical industry, catalytic cracking.

Four, description of drawings

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

Fig. 2 is the A-A cutaway view of Fig. 1.

Five, the specific embodiment

The utility model is made up of institutes such as tedge 1, cylindrical shell 2, end socket 3, bearing 4, down-comer 5 and interior arrangements 6.Boiler barrel cylinder 2 usefulness thick steel sheets roll and are welded into cylindrical shape, and two ends end socket 3 generally forms with the steel plate compacting, with cylindrical shell 2 welding, have oval manhole on two ends end socket 3, are convenient to inspection and maintenance.Cylindrical shell 2 is by bearing 4 support fixation, and bearing 4 adopts saddle supports, has elliptical aperture at the base of saddle support.Drum internals 6 has cyclone separator, demister and steam (vapor) outlet secondary demister, gives water distribution pipe, chemical feed pipe and continuous blowdown pipe.Some indicating meters and protective device are arranged, as water level meter, Pressure gauge and safety valve etc. on the drum outer wall.

Drum is connected with down-comer 5, tedge 1, forms natural convection loop.Simultaneously, drum is accepted the feedwater of economizer again, also carries saturated vapor to superheater.So drum is the connection hinge of heating in the boiler, evaporation, overheated these three processes.

Because drum has stored the water of some, allow a small amount of fluctuation of feedwater flow short time, and needn't require feedwater flow and steam flow to keep strict balance constantly, increased the stability of boiler operatiopn.Water that stores in the drum and steam have also played the effect of compensator or trimmer pressure fluctuation.When steam pressure raise, because of the saturation temperature rising of correspondence, the water in the drum stored a part of heat, and it is slower that pressure is raise; When steam pressure reduced, because of the saturation temperature decline of correspondence, the water in the drum will be emitted a part of heat, produces steam, and the steam that is stored in simultaneously in the drum discharges in the mode that expands, and it is slower that steam pressure is reduced.

The utility model waste heat boiler drum operation principle:

Feedwater enters boiler after repeatedly evaporate, concentrate, and boiler(water)concentration increases, and becomes very unclean.When the steam water interface in the economizer pours drum or steam bubble and goes out the water surface, can cause very big stirring to the water surface, make and form many droplets that splashing in the drum vapor space.These globules can be brought superheater into steam, and salt scale coagulation in the superheater pipeline causes the superheater tube wall temperature to raise and burns out.Therefore, for the globule is separated from steam, the minimizing saturated vapor carries the machinery of moisture the installing water separator exactly in drum, the raising steam quality.Behind the installing steam-water separator, can avoid the water droplet fragmentation, and steam is evenly distributed in drum, avoid local place steam flow rate too high, thereby can improve the effect that carbonated drink is separated.Water separator in drum can separate the water droplet of saliferous in the steam, and that isolated steam is admitted to superheater is overheated, becomes superheated steam.

Compare with traditional drum, the utlity model has following advantage:

Drum supporting adopts saddle support, has elliptical aperture at the base of saddle support, when having overcome traditional drum and propping up a difficult problem of hanging difficulty, has guaranteed drum free wxpansion vertically, can also satisfy the needs of drum radial displacement.

Inside steam drum first and second water separator all adopts demister, makes that the water droplet of saliferous is attached on the net piece in the saturated vapor, has improved steam quality, and steam is drawn from drum uniformly. And traditional drum first separation device does not have Despumation device, and secondary separation device adopts even vapour top board, and the perforate aperture is bigger on the plate, make water droplet mixed with saturated vapor in enter superheater, cause the superheater tube wall temperature to raise and burn out. Steam-water separation effect is undesirable, can't guarantee steam quality.

Claims

1. waste heat boiler drum, form by tedge (1), boiler barrel cylinder (2), ellipse head (3), bearing (4), down-comer (5) and drum internals (6) etc., it is characterized in that: its bearing (4) adopts saddle support, and all parts of forming drum connect into an integral module.

2. waste heat boiler drum according to claim 1 is characterized in that: the base at saddle support has elliptical aperture.

3. waste heat boiler drum according to claim 1 is characterized in that: drum internals (6) is demister and secondary demister once.