CN201731495U

CN201731495U - Pulse nozzle with spiral protection wind

Info

Publication number: CN201731495U
Application number: CN2010202883482U
Authority: CN
Inventors: 李红; 王艳新; 顾秀芬; 陈丽娟
Original assignee: HARBIN MODERN SOOTBLOWING TECHNOLOGY Co Ltd
Current assignee: HARBIN MODERN SOOTBLOWING TECHNOLOGY Co Ltd
Priority date: 2010-08-11
Filing date: 2010-08-11
Publication date: 2011-02-02
Anticipated expiration: 2020-08-11

Abstract

The utility model discloses a pulse nozzle with spiral protection wind, which comprises an elbow, a round pipe and a guiding nozzle head which are connected in sequence, wherein an annular wind pressure chamber is arranged outside the round pipe; the section of the wind pressure chamber is concave, and one end of a notch thereof is connected with the peripheral surface of the round pipe, thus forming an annular cavity; an air inlet pipe is connected on the peripheral surface of the wind pressure chamber; and a spiral gap is arranged on the wall of the round pipe in the wind pressure chamber and used as a spiral guiding air port. The pulse nozzle with spiral protection wind has the following benefits: an air pump guarantees stable air pressure flow, certain wind pressure is generated in the wind pressure chamber through a wind pipe, and a spiral airflow column is generated along the inner wall of the nozzle through the spiral guiding air port, thus enabling high-temperature flue gas in a furnace not to enter the nozzle, and further preventing corrosion of the nozzle caused by high-temperature flue gas entering the nozzle for condensing. In addition, the wind pressure generated by the external spiral guiding air port is far lower than the pressure of deflagration products in a pulse tank, therefore, the deflagration products in the pulse tank are guided to a heating surface without influence in the normal working process.

Description

The impulse jet nozzle of band spiral protection wind

Technical field

The utility model relates to a kind of impulse jet nozzle with spiral protection wind, is used for the gas-burning pulse ash-blowing device of gas-operated thermal bath facility (as gas fired-boiler).

Background technology

The gas-burning pulse ash-blowing device utilizes the combustion gas and the air of natural gas, hydrogen, acetylene and the contour reactivity worth of oil plant Device in Gas to prepare by a certain percentage, make Impulsive tank produce detonation by the flame conduit, burning gases moment pressure energy increases sharply, the unexpected pressure energy in the exit of detonation flame nozzle on directed gas-burning pulse device with velocity of sound or supersonic speed discharges ejection, by the dust stratification on purging, acoustic fatigue, heat cleaning and the local rapping removing boiler heating surface, last dust is taken away by flue gas stream winding up, thereby has improved the thermal efficiency of boiler.

The gas-burning pulse ash-blowing device blows the heating surface of ash, and its high-temperature area is more than 600 ℃, because high-temperature fuel gas is higher than the acetylene gas burning-point far away, can produce the phenomenon of lighting a fire when high-temperature flue gas and gaseous mixture directly contact, and reduces and blows grey intensity.The part boiler smoke contains SO simultaneously ₂Deng corrosive gas, be radiated stove outer nozzle inside by the stove inner nozzle, because stove is outward a normal temperature, so corrosive fume generation condensation, cause corrosion to stove outer nozzle and elbow.

Existing air curtain apparatus has certain blast, between Impulsive tank and impulse jet nozzle, form an air curtain, cutting off high-temperature flue gas contacts with the direct of gaseous mixture in the ash handling equipment, prevent that high temperature two sound from appearring in combustion gas high energy pulse ash handling equipment (is that the part air mixture is lighted the little detonation of generation by high-temperature flue gas earlier in the Impulsive tank, produce detonation by normal ignition again, twice smaller not having of detonation dynamics blown grey effect) phenomenon.Because this air curtain apparatus only plays partition between Impulsive tank and impulse jet nozzle, high-temperature flue gas can also enter into nozzle interior, easily causes nozzle erosion.

Summary of the invention

The purpose of this utility model provides a kind of impulse jet nozzle with spiral protection wind, and it can produce a kind of spiral air flow post along nozzle inner walls and blow in the stove, makes high-temperature flue gas not enter impulse jet nozzle inside, thereby thoroughly solves the nozzle erosion problem.

The technical solution of the utility model is: comprise the elbow, pipe and the directional nozzle head that connect successively, it is characterized in that, the blast chamber of annular is housed in the outside of described pipe, the cross section of this blast chamber is a spill, the outer peripheral face of its recess one end and this pipe connects and composes the cavity of annular, outer peripheral face in this blast chamber is connected with air inlet pipe, is provided with spiral-shaped slits as the spirally-guided air port on the tube wall of this indoor pipe of this blast.

Described spirally-guided air port is provided with three, circumference uniform distribution along pipe, the abutting end in three spirally-guided air ports 3 is being axially arranged with spacing, the length in each spirally-guided air port is corresponding to 120 ° of central angles, the width in this spirally-guided air port is 2～4mm, helical angle is 85 °, the both sides in this spirally-guided air port radially and described pipe radially between angle be 5 °.

The utlity model has following beneficial effect: its air pump guarantees that the air pressure flow is stable, and produce certain blast in the blast chamber by airduct, produce a kind of spiral air flow post by the spirally-guided air port along nozzle inner walls, make the furnace high-temperature flue gas can not enter nozzle interior, thereby prevent that condensation produces corrosion to nozzle in the nozzle because of high-temperature flue gas enters.Therefore the blast of spirally-guided air port generation does not influence in course of normal operation the guiding of the combustion product in Impulsive tank heating surface well below Impulsive tank detonation product pressure in addition.

Description of drawings

Fig. 1 is a general structure schematic diagram of the present utility model;

Fig. 2 is that the P of Fig. 1 is to partial view;

Fig. 3 is the A-A cutaway view of Fig. 1;

Fig. 4 is the B-B cutaway view of Fig. 2;

Fig. 5 is the C-C cutaway view of Fig. 1;

Fig. 6 is the enlarged drawing at D place among Fig. 1;

Fig. 7 is the lateral plan of blast chamber among Fig. 1;

Structural representation when Fig. 8 is the utility model application.

The specific embodiment

Referring to Fig. 1～Fig. 8, the utility model comprises elbow 5, pipe 6 and the directional nozzle head 7 that connects successively, it is characterized in that, the blast chamber 2 of annular is housed in the outside of described pipe 6 (outer peripheral face), the cross section of this blast chamber 2 is a spill, the outer peripheral face of its recess one end and this pipe 6 connects and composes the cavity of annular, and the outer peripheral face in this blast chamber 2 is connected with air inlet pipe 4, is provided with spiral-shaped slits as spirally-guided air port 3 on the tube wall of this pipe 6 in this blast chamber 2.Described blast chamber 2 can be welded by outer pipe 8 and both sides annular slab 9, and described air inlet pipe 4 is welded on the outer pipe 8.

Described spirally-guided air port 3 is provided with three, circumference uniform distribution along pipe 6, the abutting end in three spirally-guided air ports 3 is being axially arranged with spacing, the length in each spirally-guided air port is corresponding to 120 ° of central angles, the width in this spirally-guided air port 3 is 2.5mm, the helical angle in spirally-guided air port 3 is 85 °, the both sides in this spirally-guided air port radially and described pipe radially between angle be 5 °.The relevant parameter in above-mentioned spirally-guided air port 3 can be adjusted according to the actual conditions of using.

Referring to Fig. 8, the utility model is when using, and the elbow 5 of pipe 6 one ends is connected with Impulsive tank 11, and the directional nozzle head 7 of pipe 6 other ends penetrates furnace wall 13, and corresponding with heating surface 14, seals by elevated-temperature seal device 12 between pipe 6 and the furnace wall 13.Blast chamber 2 is positioned at outside the furnace wall 13, and the air inlet pipe 4 of blast chamber 2 is connected with the air outlet of blower fan 1 by airduct 10.

Claims

1. impulse jet nozzle with spiral protection wind; comprise the elbow, pipe and the directional nozzle head that connect successively; it is characterized in that; the blast chamber of annular is housed in the outside of described pipe; the cross section of this blast chamber is a spill; the outer peripheral face of its recess one end and this pipe connects and composes the cavity of annular, and the outer peripheral face in this blast chamber is connected with air inlet pipe, is provided with spiral-shaped slits as the spirally-guided air port on the tube wall of this indoor pipe of this blast.

2. the impulse jet nozzle of band spiral protection wind according to claim 1; it is characterized in that; described spirally-guided air port is provided with three; circumference uniform distribution along pipe; the abutting end in three spirally-guided air ports is being axially arranged with spacing, and the length in each spirally-guided air port is corresponding to 120 ° of central angles, and the width in this spirally-guided air port is 2～4mm; helical angle is 85 °, the both sides in this spirally-guided air port radially and described pipe radially between angle be 5 °.