CN201028469Y

CN201028469Y - W shaped full natural circulation sulfurous iron ore exhaust-heat boiler

Info

Publication number: CN201028469Y
Application number: CNU2007200794567U
Authority: CN
Inventors: 夏正; 夏禄殿
Original assignee: 夏正; 夏禄殿
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-02-27

Abstract

The utility model discloses a W type entirely natural circulation pyrite ore waste heat boiler, comprising a boiling cylinder, a concentrated declining tube, a flue gas inlet, four vertical flues, a flue gas outlet, two ash buckets, all types of water-walls and headers, a superheater, the convection banks, an upright post and a beam. The two ash buckets are arranged inside a cinder cooling tube with two ends connecting to the lower header and a plurality of an oblique shutter type clapboard; the fire resisting partitions of the four flues are arranged inside a partition water cooling pipe respectively as the further improvement of the utility model, the transverse pipe of the partition water cooling pipe is arranged by an angle sloping upward; the projection of the heat exchanging pipe of the convection banks of the third flue and the forth flue on the plane is staggeringly arranged by presenting a cross shape; the flue gas turning area on the top of the third flue is provided with a plurality of flue gas baffle welded on the upper header. The utility model has the advantages of high thermal efficiency, not easy collapsing partition and long use life, and the entirely natural circulation can be realized.

Description

The full Natural Circulation troilite of W type waste heat boiler

Technical field

The utility model relates to a kind of W type troilite waste heat boiler.

Background technology

At present, at the widely used W type of pyrite-based sulfuric acid production industry troilite waste heat boiler, comprise drum, disperse down-comer, gas approach, four vertical flues, exhanst gas outlet, lay respectively at first and second flues, two ash buckets under third and fourth flue, place water-cooling wall and each collection case in each flue, and column and crossbeam, in second flue, also be provided with superheater, in third and fourth flue, also be provided with convection bank, during work, the lime-ash of high temperature falls into the hydrolock dust ram under ash bucket and the ash releasing tube, a large amount of high temperature grey particles enter in the water, produce strong evaporation, water vapour is in ash bucket enters flue, after water vapour is heated, be discharged from boiler, reduced the thermal efficiency of boiler at last; Partition wall is used refractory concrete merely simultaneously, then collapse easily, or single panelized-tube-wall section of using, then be difficult for maintenance after the seepage; And the projection of the heat exchanger tube of the convection bank of third and fourth flue on horizontal plane arranged in an overlapping, reduced the quantity of heat exchanger tube under equal height, reduced heating surface, further reduced the thermal efficiency of boiler, if reached same efficiency, steel consumption just increases.

The utility model content

The purpose of this utility model is the above-mentioned deficiency at prior art, the full Natural Circulation troilite of the W type waste heat boiler that provides a kind of thermal efficiency height, partition wall to be difficult for collapsing.

For achieving the above object, the full Natural Circulation troilite of W type of the present utility model waste heat boiler, comprise drum, common downcomer, gas approach, four vertical flues, exhanst gas outlets, lay respectively at two ash buckets under first and second flues, third and fourth flue, place the water-cooling wall in each flue and respectively collect case and column and crossbeam, in second flue, also be provided with superheater, in third and fourth flue, also be provided with convection bank, it is characterized in that in two ash buckets, being equipped with the lime-ash cooling tube bundle that two ends link to each other with the next part case; This cooling tube bundle absorbs the heat of hot lime-ash, also improves the thermal efficiency of boiler when increasing evaporation capacity;

As further improvement of the utility model, in the refractory concrete partition wall of four flues, be equipped with the partition wall water cooling tube, the horizontal pipe of partition wall water cooling tube is acclivitous angle setting; Overcome and collapsed easily merely, or singly made partition wall with panelized-tube-wall section with the refractory concrete wall, not easy-to-maintain disadvantage after the seepage, and make vapour, water stratification in the pipe, prevent steam binding, to guarantee the Natural Circulation of pot water;

As further improvement of the utility model, the projection of the heat exchanger tube of the convection bank of third and fourth flue on horizontal plane is the fork-shaped stagger arrangement arranges, has increased the quantity of heat exchanger tube under equal height, has strengthened heating surface, further improves the thermal efficiency of boiler;

As further improvement of the utility model, in two ash buckets, all be furnished with several piece baffle plate that tilt, venetian blind type, most of lime-ash effectively can be separated, and make flue gas stream when turning to, reduce the bias current effect, reduce washing away to superheater, water-cooling wall and convection bank, reduce wearing and tearing, prolong the service life of superheater, convection bank and water screen tube;

As further improvement of the utility model, be provided with doubly-linked lock flap valve at ash releasing tube place, the bottom of two ash buckets, opening gravity automatically and can being designed to different values of upper and lower two turnover panels do not opened two turnover panels simultaneously, treat to discharge again after the cooling of high temperature soot particle, improved the thermal efficiency;

As further improvement of the utility model, the flue gas on the 3rd flue top turns to the district to be provided with several piece and is welded on flue gas hydraulic barrier on the upper collecting chamber, makes flue gas flow equalizing, reduces bias current, reduces the erosive wear for convection bank, prolongs pipe service life;

As further improvement of the utility model, upper collecting chamber inboard below gas approach is welded with several bitch, be coated with refractory concrete at upper collecting chamber and bitch, make refractory concrete adhere to more firmly, avoid coming off, and the cross-sectional area of gas approach is less than the cross-sectional area of first flue, flue gas and dust maintain certain distance with water screen tube after entering first flue, to reduce wearing and tearing, prolong the life-span of membrane wall pipe to tube outer wall;

As further improvement of the utility model, be furnished with manual rapping apparatus on the heat exchanger tube of the convection bank in third and fourth flue, can remove superficial dust effectively, improve the thermal efficiency of boiler;

As further improvement of the utility model, all pass on the collection case of furnace wall and the pipe and all weld an annular slab, being the gap between annular slab and the furnace wall is provided with, between the outer casing of ring baffle and furnace wall, be provided with the mixture of refractory fibre and fire clay, both guaranteed the expansion freely between collection case and pipe and the furnace wall, the reliable sealing of having got back;

In sum, the utlity model has that thermal efficiency height, partition wall are difficult for collapsing, the advantage of long service life, and can realize full Natural Circulation.

Description of drawings

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

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the structural representation of partition wall.

Fig. 4 is the A-A cutaway view of Fig. 2.

Fig. 5 is the partial enlarged drawing at I place among Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

By illustrated in figures 1 and 2, the full Natural Circulation troilite of this W type waste heat boiler, comprise drum 1, common downcomer 2, gas approach 3, four vertical flues 4,5,6,7, exhanst gas outlet 8, lay respectively at first and second flues 4,5, third and fourth flue 6, two ash buckets 9 under 7, place water-cooling wall and each collection case in each flue, and column 10 and crossbeam 11, in second flue 5, also be provided with superheater 12, in third and fourth flue 6,7 also are provided with convection bank 13, wherein, in two ash buckets 9, be equipped with lime-ash cooling tube bundle 14 that two ends link to each other with the next part case and five inclinations, the baffle plate 15 of venetian blind type, in the ash releasing tube 16 of two ash buckets 9, all be furnished with doubly-linked lock flap valve 17, on, opening gravity automatically and can being designed to different values of following two turnover panels do not opened two turnover panels simultaneously; Upper collecting chamber 18 inboards below gas approach 3 are welded with a plurality of bitch 19, be coated with refractory concrete at upper collecting chamber 18 and bitch 19, make refractory concrete adhere to more firmly, and the cross-sectional area of gas approach 3 is less than the cross-sectional area of first flue 4, flue gas and dust enter first flue, 4 backs and maintain certain distance with water screen tube, to reduce wearing and tearing, prolong the life-span of membrane wall pipe to tube outer wall; In the refractory concrete partition wall of four flues, be equipped with partition wall water cooling tube 20, the horizontal pipe 21 of partition wall water cooling tube 20 is acclivitous angle setting (as shown in Figure 3), overcome and collapsed easily merely with the refractory concrete wall, or list is made partition wall with panelized-tube-wall section, not easy-to-maintain disadvantage after the seepage, and make vapour, water stratification in the pipe, prevent steam binding, to guarantee the Natural Circulation of pot water; The projection of heat exchanger tube 22 on horizontal plane of the convection bank 13 of third and fourth flue 6,7 is the fork-shaped stagger arrangement and arranges, on heat exchanger tube 22, be furnished with manual rapping apparatus 23 (as shown in Figure 4), flue gas on the 3rd flue 6 tops turns to the district to be provided with the flue gas hydraulic barrier 25 of three block weldings on upper collecting chamber 18, make flue gas flow equalizing, reduce erosive wear, prolong pipe service life for convection bank 13; As shown in Figure 5, pass on the collection case of furnace wall and the pipe and all weld an annular slab 26, being the gap between annular slab 26 and the furnace wall is provided with, between the outer casing of ring baffle 26 and furnace wall, be provided with the mixture 27 of refractory fibre and fire clay, both guaranteed the expansion freely between collection case and pipe and the furnace wall, the reliable sealing of having got back.

Claims

1. the full Natural Circulation troilite of W type waste heat boiler, comprise drum, common downcomer, gas approach, four vertical flues, exhanst gas outlets, lay respectively at two ash buckets under first and second flues, third and fourth flue, place the water-cooling wall in each flue and respectively collect case and column and crossbeam, in second flue, also be provided with superheater, in third and fourth flue, also be provided with convection bank, it is characterized in that in two ash buckets, being equipped with the lime-ash cooling tube bundle that two ends link to each other with the next part case.

2. the full Natural Circulation troilite of W type according to claim 1 waste heat boiler is characterized in that being equipped with the partition wall water cooling tube in the refractory concrete partition wall of four flues, and the horizontal pipe of partition wall water cooling tube is acclivitous angle setting.

3. the full Natural Circulation troilite of W type according to claim 1 waste heat boiler is characterized in that the projection of heat exchanger tube on horizontal plane of the convection bank of third and fourth flue is fork-shaped stagger arrangement layout.

4. the full Natural Circulation troilite of W type according to claim 1 waste heat boiler is characterized in that all being furnished with several piece baffle plate that tilt, venetian blind type in two ash buckets.

5. the full Natural Circulation troilite of W type according to claim 1 waste heat boiler is characterized in that all being furnished with doubly-linked lock flap valve in the ash releasing tube of two ash buckets.

6. the full Natural Circulation troilite of W type according to claim 1 waste heat boiler is characterized in that flue gas on the 3rd flue top turns to the district to be provided with several piece and is welded on flue gas hydraulic barrier on the upper collecting chamber.

7. the full Natural Circulation troilite of W type according to claim 1 waste heat boiler, it is characterized in that the upper collecting chamber inboard below gas approach is welded with several bitch, be coated with refractory concrete at upper collecting chamber and bitch, and the cross-sectional area of gas approach is less than the cross-sectional area of first flue.

8. the full Natural Circulation troilite of W type according to claim 1 waste heat boiler, it is characterized in that in third and fourth flue convection bank heat exchanger tube on be furnished with manual rapping apparatus.

9. the full Natural Circulation troilite of W type according to claim 1 waste heat boiler, it is characterized in that all welding an annular slab on collection case that all pass furnace wall and the pipe, be the gap between annular slab and the furnace wall and be provided with, between the outer casing of ring baffle and furnace wall, be provided with the mixture of refractory fibre and fire clay.