CN201706486U

CN201706486U - Novel bell jar cylindrical blast cap for circulating fluidized bed boiler

Info

Publication number: CN201706486U
Application number: CN2010202051109U
Authority: CN
Inventors: 孙正才; 西献月
Original assignee: YANTAI BAENT THERMAL POWER EQUIPMENT ENGINEERING Co Ltd; YANTAI HUALU THERMAL POWER EQUIPMENT RESEARCH INSTITUTE
Current assignee: YANTAI BAENT THERMAL POWER EQUIPMENT ENGINEERING Co Ltd; YANTAI HUALU THERMAL POWER EQUIPMENT RESEARCH INSTITUTE
Priority date: 2010-05-18
Filing date: 2010-05-18
Publication date: 2011-01-12
Anticipated expiration: 2020-05-18

Abstract

The utility model relates to a boiler blast cap, particularly to a bell jar cylindrical blast cap suitable for a circulating fluidized bed boiler, which mainly comprises a blast cap inner sleeve pipe and a blast cap outer sleeve cap, wherein a plurality of big air distributing holes are formed at the lower part of the blast cap outer sleeve cap; the blast cap is characterized in that symmetrical grooves are formed at the periphery of the bottom hole of the blast cap outer sleeve cap, and a locking key is arranged on the sides of the grooves respectively; and a flange disk is arranged at the joint of the blast cap inner sleeve pipe and the blast cap outer sleeve cap, and raised keys combined with the grooves on the blast cap outer sleeve cap are arranged on the blast cap inner sleeve pipe. By the adoption of the blast cap, the air distribution becomes more uniform, and the fluidization performance of material is excellent; and the air outlet of the blast cap is not blocked, the outer sleeve of the blast cap is prevented from dropping off, and slag is prevented from leakage into the air chamber, so that the normal operation of the boiler is ensured.

Description

The novel bell jar column type of CFBB blast cap

One. technical field

The utility model relates to a kind of Wind cap for boiler, is a kind of bell jar column type blast cap that is used on the CFBB.

Two. technical background

Blast cap is the indispensable parts of CFBB, and its main effect is that the needed air of boiler combustion is sent into burner hearth as far as possible equably, makes a materials flowization even, sufficient combustion.But present most of bell-jar blast caps are installed for the free plug-in of larger-size employing, the less employing of the size installation that is threaded.In the blast cap use, free plug-in blast cap is owing to arrange that quantity is few, and tuyere spacing is big, has bed materials flow lack of homogeneity and the emerged in operation blast cap defective that comes off, and causes the phenomenon of boiler operatiopn deterioration or blowing out; Thread damage appears in the blast cap that is threaded for the employing effect such as temperature, cavitation erosion in the stove that is subjected to that is in operation, and can't dismantle or stripped thread comes off.These factors have all influenced the normal cloth wind of boiler grid plate, have reduced the operational efficiency of boiler and the security of boiler plant operation.

Three. summary of the invention

The purpose of this utility model is intended to overcome the deficiency of above-mentioned prior art, and provides a kind of cloth wind even, does not stop up, and does not come off the novel bell jar column type of the CFBB blast cap that the life-span is long.

For achieving the above object, the utility model is achieved in that the novel bell jar column type of a kind of CFBB blast cap, the outer cap bag of the blast cap that comprises the blast cap inner sleeve and be connected with its socket, the bottom of the outer cap bag of blast cap has several big wind distributing holes, it is characterized in that, outside blast cap, have the groove of symmetry on the bottom outlet periphery of cap bag, be provided with a locking key in a side of groove; On the blast cap inner sleeve with blast cap outside the junction of cap bag be provided with the flange disk, on the blast cap inner sleeve, be provided with the protruding key that matches with groove on the cap bag outside the blast cap.

The top of above-mentioned blast cap inner sleeve is the arch sealing, and the upper end has circumferentially uniform oval air outlet.

Distance between the big wind distributing hole lower edge on the outer cap bag of the upper end air outlet upper limb of described blast cap inner sleeve and blast cap is 35～100mm.

The good effect that compared with the prior art the utility model has is, optimized air-supply passage, makes cloth wind more even, the fluidizing performance of material is splendid, the blast cap wind distributing hole does not stop up, and the blast cap overcoat has adopted location structure not come off, and has prevented that effectively material from falling into air compartment; The resistance of this blast cap is moderate, can reduce the pressure head consumption of boiler primary air fan when guaranteeing bed material active fluidization effectively, and significantly energy-saving and cost-reducing effect is arranged, and improved the efficient and the safety in operation of boiler combustion, and service life is longer, and inspection operation is convenient.

Five, description of drawings

Fig. 1 is a part sectional structure schematic diagram of the present utility model.

Fig. 2 partly cuts open schematic diagram for the outer cap bag of blast cap.

Fig. 3 is the upward view of the outer cap bag of blast cap.

Fig. 4 partly cuts open schematic diagram for the blast cap inner sleeve.

Fig. 5 is the vertical view of blast cap inner sleeve.

Six, the specific embodiment

With reference to Fig. 1-Fig. 4 as seen, the novel bell jar column type of CFBB described in the utility model blast cap mainly is that blast cap inner sleeve 1 reaches outer cap bag 2 compositions of the blast cap that is connected with its socket, the bottom of cap bag 2 has several big wind distributing holes 3 outside blast cap, outside blast cap, have the groove 4 of symmetry on the bottom outlet periphery of cap bag 2, side at groove 4 is provided with a locking key 5, comes off to prevent the outer cap bag of blast cap; On blast cap inner sleeve 1 with blast cap outside the junction of cap bag 2 be provided with flange disk 6, be used for preventing that inner wind direction guest performer from going out, blast cap inner sleeve 1 above the flange disk is provided with the protruding key 7 that matches with groove 4 on the toison outside the blast cap, to guarantee that blast cap in use can not come off, prevent to leak slag toward air compartment; For guaranteeing that blast cap in use can not rotate and be sticked out by wind, and the air distribution in the blast cap is more even, making the big cloth tuyere air volume of the outer cap bag of each blast cap even, is the arch sealing with the top design of blast cap inner sleeve 1, and its upper end has circumferentially uniform oval air outlet 8; In order to make cloth wind effect better, the distance between the big wind distributing hole lower edge on the outer cap bag of air outlet 8 lower edges of above-mentioned blast cap inner sleeve and blast cap is 35～100mm.

During installation, the lower end of blast cap inner sleeve is fixedly welded on the tube connector of former air distribution plate, and cast concrete is in order to insulation below the flange disk, the outer cap bag of blast cap supports the location by inner sleeve, ° gets final product by Rotate 180 behind the protruding key of inner sleeve.

During boiler operatiopn, the lower end that wind in the air compartment overlaps in the blast cap enters, putting the end in the blast cap then evenly sprays, evenly cool off the blast cap overcoat, turning back 180 ° enters in the inside and outside cover interlayer of blast cap again, and several big wind distributing hole ejections around the cap bag bottom outside blast cap at last enter fluidising chamber, the boiling material makes it abundant burning; This blast cap cloth wind is more even, and serviceability is better, and better effects if is a kind of desirable novel blast cap.

Claims

1. the novel bell jar column type of CFBB blast cap, the outer cap bag (2) of the blast cap that comprises blast cap inner sleeve (1) and be connected with its socket, the bottom of the outer cap bag (2) of blast cap has several big wind distributing holes (3), it is characterized in that: outside blast cap, have the groove (4) of symmetry on the bottom outlet periphery of cap bag, be provided with a locking key (5) in a side of groove (4); Blast cap inner sleeve (1) go up and blast cap outside the junction of cap bag (2) be provided with flange disk (6), on blast cap inner sleeve (1), be provided with the protruding key (7) that matches with groove (4) on the cap bag (2) outside the blast cap.

2. according to the novel bell jar column type of the described CFBB of claim 1. blast cap, it is characterized in that: the top of blast cap inner sleeve (1) is the arch sealing, and the upper end has circumferentially uniform oval air outlet (8).

3. according to the novel bell jar column type of the described CFBB of claim 1. blast cap, it is characterized in that: the distance between big wind distributing hole (3) lower edge on the outer cap bag (2) of upper end air outlet (8) lower edge of blast cap inner sleeve (1) and blast cap is 35～100mm.