CN202692090U

CN202692090U - Soot blower for air preheater

Info

Publication number: CN202692090U
Application number: CN 201220333378
Authority: CN
Inventors: 张凤岐; 王啸; 曹慧银
Original assignee: QINGDAO DORIGHT CO Ltd
Current assignee: QINGDAO DORIGHT CO Ltd
Priority date: 2012-07-05
Filing date: 2012-07-05
Publication date: 2013-01-23
Anticipated expiration: 2022-07-05

Abstract

Currently, one known soot blower for an air preheater combines a steam soot blowing channel with a steam cooling channel. When the soot blower works, air blow pipes are baked by high-temperature flue gas to expand and elongate, one end of each air blow pipe is welded on a cylindrical short section, and the other end of each air blow pipe is telescopic. The heat expansion elongation of each air blow pipe is hardly determined for various reasons, soot blowing steam can be blown to refractory materials at the edge of a heat exchange tube when the position of a nozzle maximally deviates from the center of the heat exchange tube as the preset elongation is inaccurate, equipment is damaged, and soot blowing efficiency is reduced. The problem can be solved by elongating the air blow pipes in two directions and limiting the air blow pipes to elongate for at most half of the overall elongation in each direction. Therefore, without changing the lengths of the air blow pipes and the tube diameter of the heat exchange tube, the maximum deviation size of the nozzle is twice smaller than the previous deviation size, the steam sprayed out of the nozzle no longer runs out of the range of the inner diameter of the heat exchange tube, the equipment is protected, and the soot blowing efficiency is improved.

Description

A kind of air preheater soot-blowing device

Technical field

The utility model relates to a kind of carbon black production equipment, especially air preheater soot-blowing device

Background technology

Carbon black industry air preheater is a kind of vertical shell-and-tube heat exchanger, carbon black smoke flows in heat exchanger tube from bottom to top, contain fine carbon black pellet in the carbon black smoke, easily hang on the heat exchanger tube inwall and to form incrustation and affect heat exchange efficiency, thereby need to clear up incrustation through soot blower commonly used.At present, having a kind of in the known air preheater soot-blowing device is the soot blower that steam soot blowing passage and steam cooling duct unite two into one, and Fig. 6 Fig. 7 Fig. 8 Fig. 9 is the structural representation of this device.Air jet pipe 22 is installed on the cylinder pipe nipple 21, and an end is welded on the cylinder short circuit, and an end injects in the retracting cylinder 24 that is welded on the cylinder short circuit, the nozzle 23 that has quantity not wait on the air jet pipe.High pressure valve 25 is closed when not blowing ash, the low pressure cooling steam from cooling air supply header 26 in branched pipe 27 enters all air jet pipes, again outside all nozzle 23 discharge pipes, one road cooling protection all air jet pipes and nozzle.When blowing ash, high pressure valve is opened in batches, and high steam enters each air jet pipe in batches, blows ash through the nozzle ejection; High steam also enters a cooling air supply header part through branched pipe, blows grey function but measure the less high steam that do not affect.Each air jet pipe is subjected to the high-temperature flue gas baking and the elongation of expanding during soot blower work, and to the retracting cylinder intrinsic displacement, retracting cylinder has sufficient length to hold the expansion elongation of air jet pipe, can not produce resistance and bursting stress etc., and service life can be very long.But, the air jet pipe expanded by heating freely extends, concerning some nozzle, whether can also aiming at heat exchanger tube behind the expansion displacement, to blow ash be problem, because enter the smoke gas flow of soot blower from the preheater base, be subjected to the up and down impact of uncertain pressure differential of soot blower, flow rate is inhomogeneous on the smoke gas flow cross section, change, can't determine the size of each air jet pipe heat expansion elongation; Because default elongation is inaccurate, in the time of nozzle location and heat exchanger tube misalignment maximum, boiler sootblowing steam can blow on the refractory matter at heat exchanger tube edge, and equipment is had infringement, and reduces and blow grey efficient.

Summary of the invention

Can't determine the size of each air jet pipe heat expansion elongation in order to solve air preheater soot-blowing device, because default elongation is inaccurate, nozzle location and heat exchanger tube misalignment are larger, can blow to when blowing ash on the refractory matter at heat exchanger tube edge, equipment there is infringement, and reduces and blow grey efficiency.The utility model provides a solution: allow air jet pipe extend towards both direction, and the elongation of half is extended at most in each direction restriction.Like this, all under the permanence condition, nozzle maximum deviation size is less one times than previous, again can not run the heat exchanger tube inside diameter ranges at air jet pipe length and heat exchange tube diameter.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of air preheater soot-blowing device, and by the cylinder pipe nipple, air jet pipe, nozzle, air jet pipe supporting component, high pressure valve, branched pipe, the compositions such as cooling air supply header; The nozzle that quantity does not wait is welded on each air jet pipe, an end installation high-voltage valve of air jet pipe, and the other end blocks; The cooling air supply header is communicated with each air jet pipe by branched pipe; It is characterized in that: every air jet pipe is all supported and the location by two air jet pipe supporting components that are fixed on the cylinder pipe nipple.This air jet pipe supporting component is by overcoat, retainer ring, interstage sleeve, airtight and watertight padding, the compositions such as gland; Interstage sleeve inside is the stuffing box structure, and interstage sleeve is outside to be connected with overcoat, and airtight and watertight padding is compressed by gland; It is characterized in that: being enclosed within a pair of overcoat on the air jet pipe is symmetrical the installation, and retainer ring is welded on the air jet pipe, when two overcoats all when " J " face is close to the retainer ring end face, air jet pipe just has been positioned, air jet pipe can not move axially; The other end of retainer ring and the distance of interstage sleeve are " X " at this moment, and " X " is half of air jet pipe overall length heat expansion elongation; During the elongation of air jet pipe heat expansion, the retainer ring on the air jet pipe is outwards mobile, range " X ".

The beneficial effects of the utility model are, soot blower can not occur steam has been blown to the problem on the refractory matter at heat exchanger tube edge again, blows grey efficient and also is improved.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a kind of air preheater soot-blowing device structural representation of the utility model and embodiment.

Fig. 2 is Fig. 1 " A-A " cutaway view.

Fig. 3 is Fig. 2 " I " enlarged drawing.

Fig. 4 is Fig. 2 " I " enlarged drawing, is another embodiment of the utility model structure.

Fig. 5 is existing a kind of soot blower structural representation.

Fig. 6 is Fig. 5 " C-C " cutaway view.

Fig. 7 is Fig. 6 " III " enlarged drawing.

Fig. 8 is Fig. 6 " V " enlarged drawing.

Fig. 1, Fig. 2, Fig. 3,1. cylinder short circuits among Fig. 4,2. air jet pipe, 3. nozzle, 4. air jet pipe supporting component, 5. high pressure valve, 6. branched pipe, 7. cooling air supply header, 8. outer tube, 9. retainer ring, 10. airtight and watertight padding, 11 interstage sleeves, 12. glands, 13. incombustible papers, 14. spring, " J " are the contact-making surfaces of overcoat and retainer ring, " H " is the casting refractory matter of cylinder pipe nipple.

21. cylinder pipe nipples among Fig. 5,22. air jet pipes, 23. nozzles, 24. retracting cylinders, 25. high pressure valves, 26. cooling air supply headers, 27. branched pipes.

The specific embodiment

Among Fig. 3, in order when casting refractory matter " H ", not allow refractory matter adhesion air jet pipe, can adopt incombustible paper 13 to twine and block.

Among Fig. 3, retainer ring 9 is welded on the air jet pipe, the method for available plug welding, and borehole plug welding hole on retainer ring carries out plug welding.

Among Fig. 4, the difference of length equals " X " to the installation length of spring 14 with pressing also, and " X " is half of air jet pipe overall length heat expansion elongation.

Claims

1. air preheater soot-blowing device, by the cylinder pipe nipple, air jet pipe, nozzle, the air jet pipe supporting component, high pressure valve, branched pipe, the cooling air supply header forms; The nozzle that quantity does not wait is welded on each air jet pipe, an end installation high-voltage valve of air jet pipe, and the other end blocks; The cooling air supply header is communicated with each air jet pipe by branched pipe; It is characterized in that: every air jet pipe is all supported and the location by two air jet pipe supporting components that are fixed on the cylinder pipe nipple.

2. a kind of air preheater soot-blowing device according to claim 1, its air jet pipe supporting component is by overcoat, retainer ring, interstage sleeve, airtight and watertight padding, gland forms; Interstage sleeve inside is the stuffing box structure, and interstage sleeve is outside to be connected with overcoat, and airtight and watertight padding is compressed by gland; It is characterized in that: being enclosed within a pair of overcoat on the air jet pipe is symmetrical the installation, and retainer ring is welded on the air jet pipe, when two overcoats all when " J " face is close to the retainer ring end face, air jet pipe just has been positioned, air jet pipe can not move axially; The other end of retainer ring and the distance of interstage sleeve are " X " at this moment, and " X " is half of air jet pipe overall length heat expansion elongation; Air jet pipe heat expansion elongation during work, the retainer ring on the air jet pipe is outwards mobile, range " X ".