CN103591604B

CN103591604B - Hot-blast outlet is located at the high-temperature air preheater at middle part

Info

Publication number: CN103591604B
Application number: CN201210568074.6A
Authority: CN
Inventors: 张凤岐; 崔建波; 曹慧银; 刘继成; 李环玉
Original assignee: QINGDAO DORIGHT CO Ltd
Current assignee: QINGDAO DORIGHT CO Ltd
Priority date: 2012-12-13
Filing date: 2012-12-13
Publication date: 2016-03-16
Anticipated expiration: 2032-12-13
Also published as: CN103591604A

Abstract

Current known high-temperature air preheater structure, hot-blast outlet is located at shell side lower end, and shell side lower end is hot operation district, is also the multiple district of equipment fault; Such as, easily there is overstressing Folding Deformation in housing lower end, and overstressing flexural deformation etc. easily occurs in heat exchanger tube lower end; For this reason, the invention provides a kind of hot-blast outlet be located at middle part preheater structure, this structure by shell, inner core, upper perforated plate, lower perforated plate I, lower perforated plate II, heat exchanger tube, deflection plate, cold wind import A, cold wind import B, the compositions such as hot-blast outlet and the air-cooled passage of lower perforated plate; One cold wind enters from housing lower end B mouth, and through the air-cooled passage of lower perforated plate, abundant cooling protection two lower perforated plates and all heat exchanger tube lower ends, improve their service life; One cold wind enters from lower house A mouth, the go directly top of housing of the annular space through shell and inner core enters shell side, and the whole housing of cooling protection, improves the non-deformability of housing.

Description

Hot-blast outlet is located at the high-temperature air preheater at middle part

Technical field

The present invention relates to a kind of carbon black production equipment, especially air preheater.

Background technology

At present, known high-temperature air preheater structure is the pipe shell type heat exchange device of vertical installation, and high-temperature flue gas walks tube side from the bottom up, and cold wind walks shell side from top to bottom, and hot-blast outlet is located at shell side lower end.High-temperature air preheater hot-blast outlet temperature can reach 950 DEG C, because operating temperature is high, high-temperature air preheater shell side lower end has just become the multiple district of equipment fault.High-temperature air preheater shell side lower end main member comprises housing lower end and heat exchanger tube lower end, although its material has all been strengthened thickening, adopt highest heat-resistant anticorrosion material, but due to material, at high temperature intensity is very low, high alloy material price is very high, design safety remaining is limited, meet accidental operation upset condition easily to break down, such as easily there is overstressing Folding Deformation in housing lower end, easily there is the significant troubles such as overstressing flexural deformation in heat exchanger tube lower end, therefore high-temperature air preheater is subject to very large threat service life.

Summary of the invention

In order to solve high-temperature air preheater existing structure, shell side lower end operating temperature height component easily breaks down problem, the invention provides the high-temperature preheater structure that a kind of hot-blast outlet is located at middle part; This structured high temperature flue gas remains walks tube side from the bottom up, but the flowing of shell side air changes, cold wind enters from shell side top and bottom respectively, hot blast is discharged from the middle part of shell side, this reduces preheater lower-end member operating temperature, because operating temperature reduces, construction material intensity just improves, so preheater lower-end member is incident fault before being just less likely to occur; Hot-blast outlet is located in the middle part of shell side, though the temperature of component improves in the middle part of shell side, but, because air preheater is a kind of heat-exchanger rig of tall and big vertical installation, preheater main member housing and heat exchanger tube, self gravitation load accounts for the major part of all vertically load, in the middle part of preheater, component gravitational load is certainly much smaller than preheater lower-end member gravitational load, therefore, under equal high temperature and same material condition, middle part component is just much safe, and fault is less likely to occur.

The technical solution adopted for the present invention to solve the technical problems is: hot-blast outlet is located at the high-temperature air preheater at middle part, be made up of double-layer wind cooled case preheater and the air-cooled passage of lower perforated plate, it is characterized in that: one. double-layer wind cooled case preheater by shell, inner core, upper perforated plate, lower perforated plate I, lower perforated plate II, heat exchanger tube, deflection plate, float tube sealing device, protective casing, cold wind import A, cold wind import B, hot-blast outlet, inner core short circuit first, inner core short circuit second, shell short circuit, ring baffle, upright baffle, bellows composition bottom inner core; Upper perforated plate is welded on shell upper end, and lower perforated plate I is welded on inner core short circuit first lower end, and lower perforated plate II is welded on inner core short circuit second and shell short circuit lower end; Cold wind import B is located at bottom shell side, and cold wind import A is located at above closing on of cold wind import B; Hot-blast outlet is located in the middle part of shell side; Two. the air-cooled passage of lower perforated plate is by shell short circuit, inner core short circuit first, inner core short circuit second, lower perforated plate I, lower perforated plate II, and ring baffle and two upright baffle are formed; In inner core short circuit second, in the face of and respectively have some air vent K back to cold wind import B direction, in inner core short circuit first, the direction back to cold wind import B has some air vent M; Two upright baffle handles are by inner core short circuit first, inner core short circuit second, shell short circuit, the annular space that ring baffle and lower perforated plate II four sides fence up is isolated into two pieces, ensures that the air of coming in from cold wind import B can only enter shell side by the passage between lower perforated plate I lower perforated plate II.Draw one air to enter from cold wind import A the double-layer wind cooled case surrounded by shell and inner core and upwards enter shell side from the upper end of inner core, turn back from hot-blast outlet through multiple tracks deflection plate and discharge; Draw one air to enter from cold wind import B, enter shell side through " the air-cooled passage of lower perforated plate ", turn back from hot-blast outlet through multiple tracks deflection plate and discharge.

The invention has the beneficial effects as follows, one. hot-blast outlet is moved on to middle part from the lower end of shell side, preheater shell lower end and heat exchanger tube lower end can be made to reduce operating temperature, improve the strength of materials, avoid housing overstressing Folding Deformation, avoid heat exchanger tube overstressing curved.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is the embodiment of the present invention and structural representation;

Fig. 2 is Fig. 1 " C-C " sectional view;

Fig. 3 is Fig. 1 " D " direction view.

Fig. 4 is Fig. 1 " E " direction view;

In Fig. 1 to Fig. 4,1 float tube sealing device, 2 upper perforated plates, 3 heat exchanger tubes; 4 shells, 5 inner cores, 6 deflection plates, 7 cold wind import A; 8 cold wind import B, 9 lower perforated plate I, 10 lower perforated plate II, 11 protective casings; 12 inner core short circuit second, 13 shell short circuits, 14 inner core short circuit first; 15 ring baffles, bellows bottom 16 inner cores, 17 hot-blast outlets; 18 upright baffle, K ventilating opening, M ventilating opening.

Detailed description of the invention

Fig. 1, Fig. 2, Fig. 3, in Fig. 4, lower perforated plate I (9), lower perforated plate II (10), heat exchanger tube (3), shell (4), inner core (5), shell short circuit (13), inner core short circuit second (12), inner core short circuit first (14), ring baffle (15), bellows (16) bottom inner core, hot-blast outlet (17), the erecting and welding order of each of upright baffle (18) etc. is: bottom inner core, bellows upper end is welded with inner core, and lower end is welded with ring baffle; Shell lower end is welded with ring baffle; Hot-blast outlet welds with inner core and shell respectively; Inner core short circuit first is soldered on ring baffle; Lower perforated plate I is soldered in inner core short circuit first; Inner core short circuit second is soldered on lower perforated plate I; Heat exchanger tube is put in lower perforated plate I pore and makes heat exchanger tube stretch out the length putting into lower perforated plate II; Heat exchanger tube welds with lower perforated plate I; Heat exchanger tube is put in lower perforated plate II pore and welds with lower perforated plate II; Two upright baffle are loaded onto and each that is in contact with it welding; Finally the shell short circuit being slit into two halves is burn-on.

In Fig. 1, inner core is fixed in the middle part of shell by hot-blast outlet, and inner core operating temperature is higher than shell, and the thermal expansion of inner core bottom is absorbed by bellows bottom inner core, and the thermal expansion of inner core top can upwards move freely.

In Fig. 1, heat exchanger tube and upper perforated plate floating seal adopt float tube sealing device, also can adopt and heat exchanger tube can be allowed to fluctuate at upper perforated plate pore, other device that simultaneously exchanger tubes and tubesheets can also be kept to seal.

In Fig. 1, it is ability in order to improve tube end high temperature resistance sweep of gases that heat exchanger tube lower end packs into protective casing.

Claims

1. hot-blast outlet be located at middle part high-temperature air preheater, be made up of double-layer wind cooled case preheater and the air-cooled passage of lower perforated plate, it is characterized in that: one. double-layer wind cooled case preheater by shell, inner core, upper perforated plate, lower perforated plate I, lower perforated plate II, heat exchanger tube, deflection plate, float tube sealing device, protective casing, cold wind import A, cold wind import B, hot-blast outlet, inner core short circuit first, inner core short circuit second, shell short circuit, ring baffle, upright baffle, bellows composition bottom inner core; Upper perforated plate is welded on shell upper end, and lower perforated plate I is welded on inner core short circuit first lower end, and lower perforated plate II is welded on inner core short circuit second and shell short circuit lower end; Cold wind import B is located at bottom shell side, and cold wind import A is located at above closing on of cold wind import B; Hot-blast outlet is located in the middle part of shell side; Two. the air-cooled passage of lower perforated plate by shell short circuit, inner core short circuit first, inner core short circuit second, lower perforated plate I, lower perforated plate II, ring baffle and two upright baffle are formed; In inner core short circuit second, in the face of and respectively have some air vent K back to cold wind import B direction, in inner core short circuit first, the direction back to cold wind import B has some air vent M; Two upright baffle handles are by inner core short circuit first, inner core short circuit second, shell short circuit, the annular space that ring baffle and lower perforated plate II four sides fence up is isolated into two pieces, ensures that the air of coming in from cold wind import B can only enter shell side by the passage between lower perforated plate I lower perforated plate II; Draw one air to enter from cold wind import A the double-layer wind cooled case surrounded by shell and inner core and upwards enter shell side from the upper end of inner core, turn back from hot-blast outlet through multiple tracks deflection plate and discharge; Draw one air to enter from cold wind import B, enter shell side through the air-cooled passage of lower perforated plate, turn back from hot-blast outlet through multiple tracks deflection plate and discharge.