CN202692002U

CN202692002U - L-shaped pyrite waste heat boiler with external fillet weld

Info

Publication number: CN202692002U
Application number: CN 201220311500
Authority: CN
Inventors: 夏禄殿; 夏正
Original assignee: ZIGONG DONGLIAN BOILER CO Ltd
Current assignee: ZIGONG DONGLIAN BOILER CO Ltd
Priority date: 2012-06-29
Filing date: 2012-06-29
Publication date: 2013-01-23
Anticipated expiration: 2022-06-29

Abstract

The utility model discloses an L-shaped pyrite waste heat boiler with an external fillet weld. The L-shaped pyrite waste heat boiler comprises a furnace body, a smoke inlet, a vertical flue, a horizontal flue, a boiler barrel, a steam-water connection pipe, a plurality of upper collection tanks, a plurality of lower collection tanks, a collection tank communication pipe, a plurality of ash hoppers, a smoke outlet, a membrane-type water cooled wall, and a plurality of rows of D-shaped evaporating tube panels, wherein a protruding elbow is arranged at the end of water cooled wall pipes connected with the collection tanks in the thermal insulation layer of the furnace body; the elbow is welded on the outer side of the collection tanks; adjacent water cooled wall pipes are connected through a sealing plate; the sealing plate at the elbow position is a comb plate; a protruding elbow is arranged on the lower ends of vertical collection boxes of the evaporating tube panels, and is welded on the outer side of the lower collection boxes; two adjacent vertical collection boxes are connected through a sealing plate, the sealing plate at the elbow position is a comb plate, and the elbow penetrates through the slot hole of the comb plate; an U-shaped elbows is arranged on both ends of an arched pipe of the evaporating tube panels; and the U-shaped elbow is welded on the outer side of the corresponding vertical collection boxes, and the sealing plate between two adjacent vertical collection boxes includes two comb plates arranged oppositely. The L-shaped pyrite waste heat boiler provided by the utility model is convenient in construction and maintenance, and easy to find leakage.

Description

The external L-type waste heat boiler for sulfuric acid production by pyrite of angle welding

Technical field

The utility model relates to a kind of waste heat boiler for sulfuric acid production by pyrite.

Background technology

In the current pyrite-based sulfuric acid production system at the L-type natural circulation boiler of usefulness, be a kind of of ZL200520033971.2 such as the patent No., joint angle weld seam on its heating surface is all inboard at flue gas, the inside of these angle weldings exists welding stress inevitably, pore, lime-ash, lack of penetration, defects i.e.cracks, and the ash-laden gas that is flowing causes wearing and tearing with the necessary relative friction of generation of weld seam; The other relieving haperacidity flue gas cold air that in a single day bleeds, airborne moisture content and sulfurous gas easily form acid solution at the face of weld of boiler, produce strong corrosion, and angle welding is the weak link of boiler, so it is unavoidable that the carbonated drink leakage situation appears in angle welding, but in the time of after accident occurs, can not being found in time again, until form a large amount of acid mists because leaking, heating surface pipe is corroded in a large number near the leak source, the state of affairs just is found after enlarging, again because flue gas contains high concentrate dust, pernicious gas, furnace inner space is narrow and small, the abominable factor of environment exists, finding correct leakage point position and damaged condition is hard problem very, for this problem, all not can solve for a long time; The patent No. is ZL201020674288.8's " external welded junction-type pyrite waste heat boiler " utility patent, although done to improve the angle welding weld bond is placed outside the stove, still has following deficiency:

1. the angle welding weld bond still is in the back side of header and pipe, and not only difficulty of construction is large, as leaks, and is difficult for being found; 2. when maintenance still needs header could overhaul after perforate is mended by replacing a damaged part and welds the mouth of pipe, and workload is large, is not easy to keep in repair; 3. comb plate, comb joint and band steel sealing strip execution conditions difficulty is difficult for promoting.

The utility model content

The purpose of this utility model is for the prior art above shortcomings, provides a kind of angle welding external L-type waste heat boiler for sulfuric acid production by pyrite, and it has constructability, leaks the advantage that easily is found, is convenient to keep in repair.

For achieving the above object, the external L-type waste heat boiler for sulfuric acid production by pyrite of angle welding of the present utility model, comprise body of heater, advance mouth, vertical gas pass, horizontal flue, drum, the carbonated drink tube connector, common downcomer and distributing pipe, several upper collecting chambers, several lower headers, header communicating pipe, several ash buckets, outlet flue, sidewall at vertical gas pass is provided with fin panel casing, both sides at horizontal flue are provided with fin panel casing, be provided with ceiling water-cooling wall and superheater in the front portion of horizontal flue, be provided with number row D type evaporation tube panel at the rear portion of horizontal flue, every row D type evaporation tube panel comprises with corresponding upper, the vertical header that lower header links to each other, the arc pipe that two ends link to each other with vertical header, it is characterized in that with insulating layer of furnace body in upper collecting chamber or the end of the water screen tube that links to each other of the lower header elbow that is a side evagination outside stove, this elbow welding is in the outside of upper collecting chamber or lower header, link to each other by sealing plate between adjacent two water screen tubes, the sealing plate of elbow is comb plate, comb joint, and elbow passes the slotted eye of comb plate, comb joint; The bottom of vertical header is the elbow of evagination, and this elbow welding links to each other by sealing plate between the adjacent two vertical headers in the outside of lower header, and the sealing plate of elbow is comb plate, comb joint, and elbow passes the slotted eye of comb plate, comb joint; The two ends of every arc pipe are return bend, and return bend is weldingly connected with the outside of corresponding vertical header, and the sealing plate between the two vertical headers comprises two comb plate, comb joints that are oppositely arranged, and return bend passes the slotted eye between two comb plate, comb joints.

The utility model is by between the water screen tube, arrange sealing plate between the vertical header, can prevent that smoke spillage is outside stove, simultaneously the end that links to each other of the upper collecting chamber in each water screen tube and the insulating layer of furnace body or lower header is the elbow of evagination, its angle welding is all in the outside of upper collecting chamber or lower header, also in the outside of sealing plate, equally, the angle welding of the lower end of vertical header and the end of lower header, arc pipe and vertical header is also in the outside of corresponding sealing plate, constructability not only, even a small amount of leakage point occurs also easily to be found, need not the header perforate, also be convenient to maintenance.

Description of drawings

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

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

Fig. 3 is the B-B cutaway view of Fig. 1.

Fig. 4 is the partial enlarged drawing at E place among Fig. 1.

Fig. 5 is the left view of Fig. 4.

Fig. 6 is the partial enlarged drawing at F place among Fig. 2.

Fig. 7 is the left view of Fig. 6.

Fig. 8 is the top view of Fig. 6.

Fig. 9 is the front view of two relative comb plate, comb joints among Fig. 7.

Figure 10 is the G-G cutaway view of Fig. 2.

Figure 11 is the partial enlarged drawing at H place among Fig. 3.

The specific embodiment

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

Extremely shown in Figure 11 such as Fig. 1, the external L-type waste heat boiler for sulfuric acid production by pyrite of this angle welding, comprise body of heater 1, advance mouth 2, vertical gas pass 3, horizontal flue 4, drum 5, carbonated drink tube connector 6, common downcomer and distributing pipe 7, several

upper collecting chambers

20,22,24 and 26, several

lower headers

21,23,25 and 27, header communicating pipe 8, several ash buckets 9, outlet flue 10, sidewall at vertical gas pass 3 is provided with fin panel casing 11, be provided with fin panel casing 12 in the both sides of horizontal flue 4, be provided with ceiling water-cooling wall 13 and superheater 14 in the front portion of horizontal flue 4, be provided with number row D type evaporation tube panel 15 at the rear portion of horizontal flue 4, adjacent two row D type evaporation tube panels 15 are crisscross arranged, every row D type evaporation tube panel 15 comprises with corresponding upper, the vertical header 16 that lower header links to each other, the arc pipe 17 that two ends link to each other with vertical header 16, in the present embodiment, the upper collecting chamber 20 and the lower header 21 that link to each other with fin panel casing 11 all are positioned at insulating layer of furnace body, the

upper collecting chamber

24 and 26 that links to each other with fin panel casing 12 is positioned at outside the insulating layer of furnace body, the

lower header

25 and 27 that links to each other with fin panel casing 12 is positioned at insulating layer of furnace body, two

upper collecting chambers

24,26 and two

lower headers

25,27 also link to each other with the vertical header 16 of D type evaporation tube panel 15 simultaneously, the upper collecting chamber 22 that links to each other with ceiling water-cooling wall 13 is positioned at outside the insulating layer of furnace body, the lower header 23 that links to each other with ceiling water-cooling wall 13 is positioned at insulating layer of furnace body, the both ends of the water screen tube 18 of fin panel casing 11 are the elbow 18a of a side evagination outside stove, this elbow 18a is welded in the outside of upper collecting chamber 20 or lower header 21, link to each other by sealing plate 28 between adjacent two water screen tubes 18, the sealing plate 28 of elbow is comb plate, comb joint, and elbow 18a passes the slotted eye of comb plate, comb joint; The bottom of the water screen tube 19 of fin panel casing 12 is the elbow 19a of a side evagination outside stove, link to each other by sealing plate 30 between adjacent two water screen tubes 19, the sealing plate 30 of elbow is comb plate, comb joint, elbow 19a passes the slotted eye of comb plate, comb joint, this elbow 19a is welded in the outside of

lower header

25 or 27, and its upper end is that straight tube links to each other with

upper collecting chamber

24 or 26; The bottom of vertical header 16 is the elbow 16a of evagination, this elbow 16a is welded in the outside of

lower header

25 or 27, its upper end is that straight tube links to each other with

upper collecting chamber

24 or 26, link to each other by sealing plate 29 between the adjacent two vertical headers 16, the sealing plate 29 of elbow is comb plate, comb joint, and elbow 16a passes the slotted eye of comb plate, comb joint; The two ends of every arc pipe 17 are return bend 17a, return bend 17a is weldingly connected with the outside of corresponding vertical header 16, sealing plate 29 between the two vertical headers 16 comprises two comb plate, comb joint 29a and the 29b that are oppositely arranged, and return bend 17a passes the slotted eye between two comb plate, comb joint 29a and the 29b; Identical with Fig. 4, the bottom of the water screen tube of ceiling water-cooling wall 13 is the elbow of a side evagination outside stove, this elbow welding is in the outside of lower header 23, also link to each other by sealing plate between adjacent two water screen tubes, the sealing plate of elbow is comb plate, comb joint, elbow passes the slotted eye (not shown) of comb plate, comb joint, and its upper end is that straight tube links to each other with upper collecting chamber 22;

The utility model is by between each

water screen tube

18 or 19, between the vertical header 16 sealing plate 28 is set, 30 or 29, can prevent that smoke spillage is outside stove, each water screen tube 18 of while, 19 with insulating layer of furnace body in upper collecting chamber 20 or

lower header

21,23,25 ends that link to each other with 27 are the elbow of evagination, its angle welding is all at upper collecting chamber 20 or

lower header

21,23,25 and 27 the outside, also in the outside of sealing plate separately, equally, lower end and

lower header

25 or 27 of vertical header 16, the angle welding of the end of arc pipe 17 and vertical header 16 is also in the outside of corresponding sealing plate, constructability not only, even a small amount of leakage point occurs also easily to be found, only need the strip off heat-insulation layer, need not the header perforate, also be convenient to maintenance.

Claims

1. external L-type waste heat boiler for sulfuric acid production by pyrite of angle welding, comprise body of heater, advance mouth, vertical gas pass, horizontal flue, drum, the carbonated drink tube connector, common downcomer and distributing pipe, several upper collecting chambers, several lower headers, header communicating pipe, several ash buckets, outlet flue, sidewall at vertical gas pass is provided with fin panel casing, both sides at horizontal flue are provided with fin panel casing, be provided with ceiling water-cooling wall and superheater in the front portion of horizontal flue, be provided with number row D type evaporation tube panel at the rear portion of horizontal flue, every row D type evaporation tube panel comprises with corresponding upper, the vertical header that lower header links to each other, the arc pipe that two ends link to each other with vertical header, it is characterized in that with insulating layer of furnace body in upper collecting chamber or the end of the water screen tube that links to each other of the lower header elbow that is a side evagination outside stove, this elbow welding is in the outside of upper collecting chamber or lower header, link to each other by sealing plate between adjacent two water screen tubes, the sealing plate of elbow is comb plate, comb joint, and elbow passes the slotted eye of comb plate, comb joint; The bottom of vertical header is the elbow of evagination, and this elbow welding links to each other by sealing plate between the adjacent two vertical headers in the outside of lower header, and the sealing plate of elbow is comb plate, comb joint, and elbow passes the slotted eye of comb plate, comb joint; The two ends of every arc pipe are return bend, and return bend is weldingly connected with the outside of corresponding vertical header, and the sealing plate between the two vertical headers comprises two comb plate, comb joints that are oppositely arranged, and return bend passes the slotted eye between two comb plate, comb joints.