CN2338611Y

CN2338611Y - Horizontal waste heat boiler of combined fire-tube and water-tube type with automatic circulation during prod. of acid using sulphur as raw material

Info

Publication number: CN2338611Y
Application number: CN 98229694
Authority: CN
Inventors: 夏正; 夏禄殿
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-16
Filing date: 1998-10-16
Publication date: 1999-09-15
Anticipated expiration: 2008-10-16

Abstract

The utility model discloses a horizontal fire and water tube waste heat boiler with natural circulations during the production of acid by using sulfur, which relates to the technical field of boilers. The utility model is characterized in that boiler barrels are longitudinally arranged on an upper part; downcomer tubes are arranged on both sides, one end of each of the downcomer tubes is connected with the upper boiler barrel, and the other end is connected with the lower boiler barrel; a three dimensional inner ribbed tube and flat tube plates at both ends of the lower boiler barrel is connected through welding after pre-expansion is adopted to eliminate gaps; one end of a gas and water eduction tube is connected with the upper boiler barrel, and the other end is connected with the lower boiler barrel; a supporting seat is arranged on the lower part of lower boiler barrel; an inlet smoke channel and an outlet smoke channel are arranged at both ends of the lower boiler barrel; a boiler wall heat insulating layer is attached to the outer surface of the boiler. The utility model is a waste heat boiler recovering low temperature residual heat and is suitable for acid producing systems by using sulfur for the conversion of four or five sections of outlets. The utility model has the characteristics that the lengths of the boiler is shortened, the heat transfer is enhanced, the structure is simplified, and the boiler consumes little steel for producing unit steam, and of small occupation of lands, reliable running, light heat insulation of boiler walls, and convenient construction and maintenance.

Description

Horizontal extreme misery pipe Natural Circulation acid production with sulphur waste heat boiler

The horizontal extreme misery pipe of the utility model Natural Circulation acid production with sulphur waste heat boiler relates to the boiler technology field, is applicable to produce per year to transform four sections or five sections waste heat boilers that middle-low temperature heat reclaims more than 40,000 tons in the sulphur-burning sulphuric acid system.

At present in the sulphur-burning sulphuric acid system of at home and abroad using, low temperature reclaims and uses more widely that the type of furnace has multitubular boiler in four sections or five sections, by drum, light pipe, flat tube sheet, army cap, turnover flue, bearing, insulation of wall are formed.Its weak point is that heat transfer coefficient is low, and boiler length is generally 8～9M, and the person's of existence steel consumption is big, the big and big problem of manufacture difficulty of tube sheet stress.

The purpose of this utility model provides a kind of horizontal extreme misery pipe Natural Circulation acid production with sulphur waste heat boiler, use this boiler can strengthen pass ripe, simplified structure, shorten boiler length greatly, it is low to have a unit air generation steel consumption, takes up an area of little, reliable, insulation of wall is light, and Construction and Maintenance are effect easily.

The design (Fig. 1～2) of the horizontal extreme misery pipe of the utility model Natural Circulation acid production with sulphur waste heat boiler is made up of upper drum (1), down-comer (2), lower drum (3), three-dimensional internal-rib pipe (4), flat tube sheet (5), carbonated drink tube connector (6), bearing (7), inlet flue duct (8), exhaust pass (9), insulation of wall (10).It is that drum (1) vertically is arranged in the top that its structure connects, down-comer (2) is arranged in both sides, one end is welded to connect on the upper drum (1), the other end is welded to connect on the lower drum (3), three-dimensional internal-rib pipe (4) is held tube sheet (5) level with both hands with two of lower drum (3) and is taked the pre-elimination gap of expanding to be welded to connect again, the specification of three-dimensional internal-rib pipe is according to the capacity of boiler, diameter is generally got between 32～60mm, for easy to assembly, three-dimensional internal-rib pipe two ends inwall should leave the light pipe district that is not less than 70mm at least, and carbonated drink fairlead (6) one ends are welded to connect upper drum (1), in addition-hold with lower drum (3) to be weldingly connected, bearing (7) is arranged in the bottom of lower drum, inlet flue duct (8), exhaust pass (9) is arranged in the two ends of lower drum, the be laid in outer surface of boiler of insulation of wall (10), the weight of whole boiler all is passed to bearing (7), is born by it.

The course of work of the present utility model is: flue gas is entered by the place ahead, flows into inlet flue duct.Flow into three-dimensional internal-rib pipe backward, wash away heat exchange, with the WATER AS FLOW MEDIUM in the heat transferred lower drum.Flue-gas temperature can be reduced to about 190 degree about spending by 440, and flue gas flow to exhaust pass, is flowed out by afterbody to enter next procedure.The WATER AS FLOW MEDIUM of working medium side is to enter down-comer by upper drum in addition, flows into lower drum, produces steam water interface behind the absorption heat and upwards flows, and connects the police by carbonated drink and flows into upper drum, and steam separates the back is drawn by upper drum, for producing use.

The effect of the alert Natural Circulation acid production with sulphur of the horizontal extreme misery of the utility model waste heat boiler is compared with prior art:

1, the utility model is a horizontal pair of barrel structure, Natural Circulation, and the structural configuration compactness, whole fast-assembling dispatches from the factory, and the on-site installation work amount is little;

2, adopt the three-dimensional internal-rib pipe augmentation of heat transfer, destroy the attached parietal layer fluid layer of fire tube, heat transfer coefficient improves about 3～6 times, makes boiler length can reduce to about 2M by former 8～9M, has the effect that shortens boiler length greatly;

3, adopt the light boiler setting insulation, make the maintenance of boiler very convenient;

4, two barrel structures make water level be positioned at upper drum, and high fire tube far away has overcome near apart from fire alarm, the easily accidents caused shortcoming of single drum multitubular boiler water level;

5, because body of heater is short, and two ends tube sheet stress is little, have safe and reliable to operationly, corresponding basis is taken up an area of little, and site operation overhauls effect easily.

Fig. 1 is the structure chart of the horizontal extreme misery pipe of the utility model Natural Circulation acid production with sulphur waste heat boiler.

Fig. 2 is the cutaway view (showing insulation of wall) of Figure 1A-A direction.

The implementation column of the horizontal extreme misery pipe of the utility model Natural Circulation acid production with sulphur waste heat boiler is to produce one to join the waste heat boiler of producing 60000 tons of sulfate systems per year, be arranged in and transform four sections outlets, model DG2.6/0.8-1 is a drum of making diameter 924 * 12mm with the 20g roll of steel plate, make the carbonated drink fairlead of 5 diameter 159 * 12mm with No. 20 steel pipes, one end is welded on the upper drum, the other end is welded on the lower drum, make the down-comer of 4 diameter 108 * 4.5mm with No. 20 steel pipes, one end is welded on the upper drum, the other end is welded on the lower drum, flat tube sheet 20g steel plate is made, specification is internal diameter 1600 * 16mm, three-dimensional internal-rib pipe is made the length 2M that diameter is 42 * 4mm with the 20G boiler tube, and rib section 1.8M is arranged.Two ends are adopted to expand afterwards to weld earlier with flat tube sheet and are connected, inlet flue duct and exhaust pass Q235-A, F, and the 8mm steel plate is made, and bearing is made and is welded on the lower drum with 8mm and thick Q235-A, the F steel plate of 10mm.

Claims

1, a kind of horizontal extreme misery pipe Natural Circulation acid production with sulphur degree heat boiler, be by upper drum, down-comer, lower drum, three-dimensional internal-rib pipe, flat tube sheet, the carbonated drink tube connector, bearing, inlet flue duct, exhaust pass, insulation of wall is formed, it is characterized in that drum (1) vertically is arranged in the top, down-comer (2) is arranged in both sides, one end is welded to connect upper drum, the other end is welded to connect lower drum (3)), three-dimensional internal-rib pipe (4) is held tube sheet (5) level with both hands with two of lower drum and is taked the pre-earlier elimination gap of expanding to be welded to connect again, carbonated drink fairlead (6) one ends are welded to connect upper drum, the other end and lower drum are weldingly connected, bearing (7) is arranged in the bottom of lower drum, inlet flue duct (8), exhaust pass (9) is arranged in the two ends of lower drum, and the be laid in outer surface of boiler of insulation of wall (10) constitutes.

2, Natural Circulation acid production with sulphur waste heat boiler according to claim 1 is characterized in that the capacity of the specification of three-dimensional internal-rib pipe (4) according to boiler, and diameter is between 32-60mm, and the combustion of three-dimensional internal-rib pipe two ends leaves the light pipe district that is not less than 70mm at least.