CN108443899B

CN108443899B - A kind of soot blower structure

Info

Publication number: CN108443899B
Application number: CN201810412634.6A
Authority: CN
Inventors: 魏振文; 崔建波; 于国庆; 王啸; 蔡杰
Original assignee: QINGDAO DORIGHT CO Ltd
Current assignee: QINGDAO DORIGHT CO Ltd
Priority date: 2018-05-03
Filing date: 2018-05-03
Publication date: 2019-08-09
Anticipated expiration: 2038-05-03
Also published as: CN108443899A

Abstract

A kind of soot blower structure, is made of shell and casing；Casing is by inner tube, outer tube, partition, nozzle, small closure plate, big closure plate and semi-ring board group at, casing perforation overall length has three steam channels, and one is led to the soot blowing channel of each nozzle by inner tube, and two are annular spaces inner and outer tubes, the two passes of upper half annular space and lower half annular space are separated by partition, they are two cooling ducts that steam comes in go to that the inside end is turned back away again；Soot blower spigot nozzle is the unique medium for connecting inner and outer pipes before improving, and the heat expansion internal force of casing absolutely acts on several isolated nozzle welds, and nozzle weld easily cracks；The heat expansion internal force for improving rear sleeve is shared by two parallel continuous partitions and weld seam, the big stress of partition weld seam forced area is small and stress is uniform, weld cracking is less likely to occur the partition weld seam newly increased, so the use reliability of new construction soot blower product will become very high.

Description

A kind of soot blower structure

Technical field

The present invention relates to a kind of soot blowers of air preheater on chemical industry equipment, especially carbon black production line.

Background technique

Soot blower is mounted on the bottom of air preheater, and the casing of soot blower is straight by 950 degree of preheater bottom carbon black smoke Connect baking；Existing soot blower casing is made of inner tube, outer tube and nozzle, and steam is walked in the inside of casing, and the outer surface of casing is by 950 The baking of carbon black smoke is spent, the metal temperature difference of casing inner and outer pipes is very big, and it is connection that nozzle, which had not only been welded on inner pipe but also had been welded on outer tube, The heat expansion internal force of unique medium of inner and outer pipes, casing absolutely acts on several isolated nozzle welds, nozzle weld by Power is huge and extremely uneven in each position stress of lap welding seam, so nozzle weld easily cracks, this is soot blowing The main reason for device product use reliability is very low always.

Summary of the invention

To solve the above-mentioned problems, the present invention improves existing soot blower cannula structure, tries to allow soot blower casing Heat expansion internal force position, removed from several isolated nozzle welds, move on to and be not susceptible to the structure of weld cracking up.

The technical solution adopted by the present invention to solve the technical problems is: a kind of soot blower structure, by shell, positioning plate, Refractory liner, casing, flanged (FLGD) U-tube, flange and short tube composition；It is characterized in that there is a row to penetrate entirely on shell That end of sleeve belt nozzle is mounted in the inside, rides over two by the mounting hole of cylinder from shell two sides along the center line of mounting hole It is weldingly fixed on shell bores on positioning plate, shell makees refractory liner；Outside shell venthole (e) above casing and Lower section venthole (f) is all burn-on short tube and flange, with flanged (FLGD) U-tube respectively the connection two-by-two of venthole (e) above casing, Lower section venthole (f) connection two-by-two, makes the cooling steam Tandem of every group of casing, stay outmost two ventholes Total inlet and outlet in the cooling steam channel as one group of casing.

Above-mentioned casing specifically includes inner tube, outer tube, partition, nozzle, small closure plate, big closure plate and half ring flat-plate, characterized in that The steam channel of three perforation overall lengths coexists on casing, one is the soot blowing channel for leading to each nozzle by inner tube, and two are by interior The annular space of pipe and outer tube is separated into the two passes of upper half annular space and lower half annular space by partition, they are that steam comes in walk from the outside Two cooling ducts turned back away again to the inside end.

The production method of above-mentioned casing the following steps are included:

Step 1. processes one group by the equidistant venthole of design requirement on inner pipe；

Outer tube is split into upper and lower two halves by step 2., and one group of hole, the quantity in hole and the distance in hole are processed in upper tube half Identical and position is corresponding up and down with inner tube, and the diameter in hole is more slightly bigger than the outer diameter of nozzle to pack into nozzle；

Step 3. is welded on nozzle on the venthole right above inner tube, and two partitions are welded on nozzle upward position The horizontal two sides of inner tube overall length；

Step 4. is with one heart close in the upper tube half and lower tube half of outer tube the outside of inner tube, welds two on inner pipe at this time Bar partition is narrowly focused towards the seam that closes up of outer tube two sides, and welding is also welded together two partitions while closing up seam；

The seam of step 5. welding tip and outer tube；

Small closure plate is welded on the end of inner tube inwardly by step 6., and big closure plate is welded on and slightly grows the outer of any than inner tube The end of pipe is blocked with the upper half annular space of two and half ring flat-plate grip pipes and lower half annular space in the end position of outer tube outwardly；

Step 7. casing upper tube half by outer end process a venthole (e), casing lower tube half lean on outer end Process a venthole (f).

The beneficial effects of the present invention are: 1. soot blower casings are by original " nozzle is the unique medium for connecting inner and outer pipes " knot Structure is changed to the annular space of inner and outer pipes is isolated into overall length by two partitions the cannula structure of upper half annular space and lower half annular space；Two The plate of bar partition is thick and solid, runs through casing overall length, and inner and outer pipes are linked to be firm one by symmetrical arrangement cannula center；Isolated Several nozzle welds almost get rid of the influence of heat expansion internal force on the casing of secured one, and nozzle weld easily cracks and asks Topic do not existed certainly, and the heat expansion internal force of casing by two in parallel continuous partitions and weld seam share, partition weld seam by Power area is much bigger, so stress is much smaller, and stress is uniformly much, so two partition weld seams are not easy to crack；Cause This, the use reliability of new construction soot blower product will become very high；2. soot blower will not go wrong a lifetime, once have Certain root casing is out of joint, and previous product can only close that soot blower etc. is to be repaired, the about some months time of waiting even one Year, in this period, whole heat exchanger tube incrustation of preheater are gradually aggravated, and largely effect on production efficiency；Casing cooling duct uses The benefit of the U-tube of flanged joint is that soot blower waits the maintenance period, does not have to close entire soot blower, only closing is gone wrong That root casing, other casings are temporarily changed its course by flanged (FLGD) U-tube, can work on, reduce production loss.

Detailed description of the invention

Fig. 1 is a kind of soot blower structure schematic diagram of the present invention and embodiment.

Fig. 2 is Fig. 1 top view.

Fig. 3 is Fig. 2 " A " direction view.

Fig. 4 is Fig. 2 " B-B " view.

Fig. 5 is 4 detail drawing of part.

1. shell in FIG. 1 to FIG. 5,2. positioning plates, 3. refractory liners, 4. casings, 5. flanged (FLGD) U-tubes, 6. flanges, 7 Short tube；41. inner tube, 42. outer tubes, 43. partitions, 44. nozzles, 45. small closure plates, 46. big closure plates, 47. half ring flat-plates；E indicates outer tube Venthole by the upper surface of outer end, f indicate venthole of the outer tube below outer end.

Specific embodiment

A kind of soot blower structure of the present invention is by shell (1), positioning plate (2), refractory liner (3), casing (4), U-tube (5), Flange (6) and short tube (7) composition；Casing (4) is by inner tube (41), outer tube (42), partition (43), nozzle (44), small closure plate (45), Big closure plate (46) and half ring flat-plate (47) composition.

Positioning plate (2) is welded and fixed inside housings after installation sheath assembly is qualified；It is all installed in casing and positioning plate The refractory liner (3) of housing cylindrical is made after qualification.

Claims

1. a kind of soot blower structure, by shell, positioning plate, refractory liner, casing, flanged (FLGD) U-tube, flange and short tube group At；It is characterized in that, the mounting hole for thering is a row to penetrate entire cylinder on shell, from shell two sides along the center of mounting hole That end of sleeve belt nozzle is mounted in the inside, rides over and be weldingly fixed on shell bores on two positioning plates, shell does resistance to by line Fiery lining；Venthole (e) above casing and lower section venthole (f) are all burn-on short tube and flange outside shell, with band flange U-tube respectively the connection two-by-two of venthole (e) above casing, lower section venthole (f) connection two-by-two, make the cold of every group of casing But steam channel is together in series, and stays total disengaging in cooling steam channel of outmost two ventholes as one group of casing Mouthful；Above-mentioned casing specifically includes inner tube, outer tube, partition, nozzle, small closure plate, big closure plate and half ring flat-plate, coexists three on casing and passes through The steam channel of logical overall length, one is the soot blowing channel for leading to each nozzle by inner tube, and two are annular space quilts by inner and outer tubes Partition is separated into the two passes of upper half annular space and lower half annular space, they are that the end is turned back again inside steam comes in go to from the outside Two cooling ducts gone out；The production method of above-mentioned casing the following steps are included:

Outer tube is split into upper and lower two halves by step 2., processes one group of hole in upper tube half, the distance in the quantity in hole and hole with it is interior It is corresponding up and down to manage identical and position, the diameter in hole is more slightly bigger than the outer diameter of nozzle to pack into nozzle；

Step 3. is welded on nozzle on the venthole right above inner tube, two partitions is welded on the inner tube of nozzle upward position The horizontal two sides of overall length；

Step 4. is with one heart close in the upper tube half and lower tube half of outer tube the outside of inner tube, weld at this time on inner pipe two every Plate is narrowly focused towards the seam that closes up of outer tube two sides, and welding is also welded together two partitions while closing up seam；

The seam of step 5. welding tip and outer tube；

Small closure plate is welded on the end of inner tube inwardly by step 6., big closure plate is welded on the outer tube that any is slightly grown than inner tube End is blocked with the upper half annular space of two and half ring flat-plate grip pipes and lower half annular space in the end position of outer tube outwardly；

Step 7. casing upper tube half by outer end process a venthole (e), casing lower tube half by outer end process One venthole (f).