CN201297836Y

CN201297836Y - Ash-returning device

Info

Publication number: CN201297836Y
Application number: CNU2008202201293U
Authority: CN
Inventors: 刘晨; 刘常林; 高杰三
Original assignee: Shenyang Aluminum and Magnesium Engineering and Research Institute Co Ltd
Current assignee: Shenyang Aluminum and Magnesium Engineering and Research Institute Co Ltd
Priority date: 2008-12-02
Filing date: 2008-12-02
Publication date: 2009-08-26
Anticipated expiration: 2018-12-02

Abstract

The utility model relates to an ash-returning device, in particular to an ash-returning device for returning the ash collected by kiln electric dust collector to the kiln hood of returning kiln burning zone in the alumina clinker burning process produced by series process. The structure of the ash-returning device is as follows: the inlet of the outer sleeve is provided with an air inlet pipe and an ash-returning branch pipe; the ash-returning branch pipe is connected with the ash-returning header pipe; the ash-returning header pipe is connected with the nozzle; the ash-returning header pipe and the ash-returning branch pipe are provided in the outer sleeve. The utility model can adjust the ash-returning amount according to the production need no matter the two ash-returning branch pipes work at the same time or only one ash-returning branch pipe works independently. Each ash-returning branch pipe has transmission air in certain amount such that the ash in the ash-returning device can send to the burning zone in kiln by air; the air in the air inlet pipe can cool the nozzle and help to return the ash. The utility model can prevent the material forming large block, forming ring and generating thick kiln coating such that the granularity of the kiln material is even.

Description

Ash return device

Technical field

The utility model relates to a kind of ash return device, relates in particular in producing alumina through series process grog sintering process, and the dust that kiln tail electricity is gathered dust collect turns back to a kind of ash return device at rotary kiln end of rotary kiln clinkering zone.

Background technology

It is an important procedure of producing alumina through series process that grog burns till.Because the handled material of producing alumina through series process rotary kiln is the red mud of producing aluminium oxide by bayer, alumina silica ratio is low; Very easily produce liquid phase in the sintering process and make grog be in molten condition, cause to generate bulk, ring formation and thick kliner coating, influence the ordinary production of chamotte kiln.

The utility model content

In order to solve the problems of the technologies described above a kind of ash return device that the utility model provides, purpose is that the dust that kiln tail electricity gathered dust collect turns back to that clinkering zone sprays on the material surface in the kiln, can prevent that material from forming bulk, ring formation and the thick kliner coating of generation, makes the kiln discharge raw meal particle size even as far as possible.

The utility model is achieved by the following technical solution to achieve these goals.

A kind of ash return device is provided with blast pipe and returns grey arm at the inlet pipe mouth of outer tube, returns grey arm and returns grey house steward and be communicated with, and returns grey house steward and communicates with nozzle, returns grey house steward and returns grey arm and be located in the outer tube.

Describedly return the top that grey arm is located at blast pipe.

It is described that to return grey arm be two.

Described two are returned grey arm and return grey house steward and be connected.

The inlet pipe mouth of described outer tube is located at the end of outer tube, and the other end of outer tube is connected with nozzle.

Described returning between grey house steward and the outer sleeve inner wall is provided with gripper shoe.

Described gripper shoe is two groups, every group of 3-6 piece.

The utility model has the advantages of: two are returned grey arm and can work simultaneously in the ash return device, also can one return grey arm and work independently.No matter two are returned grey arm and work simultaneously still one and return grey arm and work independently, and return grey amount and can regulate according to producing needs.Each returns all a certain amount of conveying air in the grey arm, the ash in the ash return device can be delivered to clinkering zone in the kiln by air like this, and the air of blast pipe also plays the effect of cooling jet except boosting is returned ash, make the kiln discharge raw meal particle size even.

Description of drawings

Fig. 1 returns the ash system structural representation.

Fig. 2 is the ash return device structural representation.

Fig. 3 is the vertical view of Fig. 2.

Fig. 4 is the profile of inlet pipe mouth among Fig. 2.

Among the figure: 1, return grey arm, 2, blast pipe, 3, gripper shoe, 4, nozzle, 5, outer tube, 6, return grey house steward, 7, the inlet pipe mouth.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is elaborated.

Ash return device off-centre of the present utility model as shown in Figure 1 is installed in the rotary kiln end place, and eccentric direction is pressed the kiln cylinder body direction of rotation and determined, enters in the kiln body 1～2 meter and be connected with band steel with the kiln hood cover.

A kind of as shown in Figure 2 ash return device, inlet pipe mouth 7 at outer tube 5 is provided with blast pipe 2 and returns grey arm 1, return grey arm 1 and return grey house steward 6 and be communicated with, return grey house steward 6 and communicate, return grey house steward 6 and return grey arm 1 and be located in the outer tube 5 with nozzle 4, inlet pipe mouth 7 places return grey arm 1 be located at blast pipe 2 above, returning grey arm 1 is two, two are returned grey arm 1 and return grey house steward 6 and be connected, and the inlet pipe mouth 7 of outer tube 5 is located at the end of outer tube 5, and the other end of outer tube 5 is connected with nozzle 4; Return between grey house steward 6 and outer tube 5 inwalls and be provided with gripper shoe 3, gripper shoe 3 is two groups, every group of 3-6 piece.

Claims

1, a kind of ash return device is characterized in that the inlet pipe mouth at outer tube is provided with blast pipe and returns grey arm, returns grey arm and returns grey house steward and be communicated with, and returns grey house steward and communicates with nozzle, returns grey house steward and returns grey arm and be located in the outer tube.

2, ash return device according to claim 1 is characterized in that the described top that grey arm is located at blast pipe of returning.

3, ash return device according to claim 1 and 2 is characterized in that described to return grey arm be two.

4, ash return device according to claim 3 is characterized in that described two are returned grey arm and return grey house steward and be connected.

5, ash return device according to claim 1 is characterized in that the inlet pipe mouth of described outer tube is located at the end of outer tube, and the other end of outer tube is connected with nozzle.

6, ash return device according to claim 1 is characterized in that described returning between grey house steward and the outer sleeve inner wall is provided with gripper shoe.

7, ash return device according to claim 6 is characterized in that described gripper shoe is two groups, every group of 3-6 piece.