CN-224229985-U - Coal powder and calcium carbide furnace tail gas mixing calcination device for double-hearth kiln

CN224229985UCN 224229985 UCN224229985 UCN 224229985UCN-224229985-U

Abstract

The utility model relates to the technical field of double-hearth kiln combustion equipment, in particular to a coal dust and calcium carbide furnace tail gas mixing calcination device used by a double-hearth kiln, which comprises a double-hearth kiln body, wherein the double-hearth kiln body comprises two kiln bodies and a through pipe used for communicating the two kiln bodies, a combustion chamber is arranged in the kiln body, an annular shell is arranged at the outer side of the kiln body, an annular cavity is formed between the annular shell and the kiln body, the two annular shells are communicated through a connecting pipe, a coal dust box communicated with the connecting pipe is arranged on the connecting pipe, the connecting pipe is equipped with two drive arrangement for carry the annular cavity with the buggy in, be equipped with the high pressure carbide stove tail gas pipe that is linked together with the annular cavity on the annular shell, the outer wall winding of kiln body is equipped with the pipe that is linked together with the annular cavity, and the lower extreme of pipe passes the kiln body and sets up in the combustion chamber, adopts buggy and carbide stove tail gas to carry out mixed combustion, improves combustion efficiency promptly, can carry out recycle again to waste gas.

Inventors

DONG BING
ZHANG SHAOHUA
TONG CHAOFEI
YU ZHIMIN
QIU MING
TANG LIMIN
QIAO XUELI
LI TIEXIN
PENG CHENGLONG
LI YAPENG
YU YANG
WANG WENHAO

Assignees

内蒙古君正化工有限责任公司

Dates

Publication Date: 20260512
Application Date: 20250529

Claims (4)

1. The device is characterized by comprising a double-hearth kiln body, wherein the double-hearth kiln body comprises two kiln bodies and a through pipe used for communicating the two kiln bodies, a combustion chamber is arranged in the kiln body, an annular shell is arranged on the outer side of the kiln body, an annular cavity is formed between the annular shell and the kiln bodies, the two annular shells are communicated through a connecting pipe, a coal dust box communicated with the connecting pipe is arranged on the connecting pipe, two driving devices are arranged on the connecting pipe and used for conveying coal dust into the annular cavity, a high-pressure calcium carbide tail gas pipe communicated with the annular cavity is arranged on the annular shell, a guide pipe communicated with the annular cavity is wound on the outer wall of the kiln body, and the lower end of the guide pipe penetrates through the kiln body and is arranged in the combustion chamber.
2. The device for mixing and calcining the pulverized coal and the tail gas of the calcium carbide furnace for the double-hearth kiln according to claim 1, wherein the driving device comprises two motors which are arranged in the connecting pipe and are arranged oppositely, the output ends of the two motors are respectively provided with a rotating shaft, and spiral pushing blades are arranged on the rotating shafts.
3. The device for mixing and calcining the tail gas of the coal dust and the calcium carbide furnace for the double-hearth kiln disclosed in claim 2 is characterized in that two first through holes are formed in the bottom of the coal dust box, second through holes communicated with the first through holes are formed in the connecting pipe, sliding grooves are formed in two sides of the coal dust box, the two sliding grooves are respectively communicated with the two first through holes, and a baffle is slidably arranged in the two sliding grooves.
4. The device for mixing and calcining the tail gas of the coal dust and the calcium carbide furnace used in the double-hearth kiln according to claim 1, wherein the guide pipe comprises a vertical pipe and an arc pipe, the upper end of the vertical pipe penetrates through the annular shell and is communicated with the annular cavity, the lower end of the vertical pipe is communicated with the upper end of the arc pipe, the arc pipe is wound on the outer side of the kiln body, and the lower end of the arc pipe penetrates through the kiln body and is arranged in the combustion chamber.

Description

Coal powder and calcium carbide furnace tail gas mixing calcination device for double-hearth kiln Technical Field The utility model relates to the technical field of double-hearth kiln combustion equipment, in particular to a coal dust and calcium carbide furnace tail gas mixing and calcining device used for a double-hearth kiln. Background The double-hearth kiln is an efficient and energy-saving industrial kiln, and is widely applied to calcination of minerals such as limestone, dolomite and the like. The conventional double-hearth kiln generally adopts a single fuel (such as calcium carbide furnace tail gas, natural gas or coal dust) for calcination, and has the following problems: 1. The combustion efficiency of single fuel is limited, so that the optimal heat energy recycling and energy conservation and emission reduction are difficult to realize; 2. the fuel adaptability is poor, and the fuel proportion is difficult to flexibly adjust according to the production requirement. Disclosure of utility model In order to solve the technical problems, the utility model adopts the following technical scheme: The utility model provides a buggy and carbide stove tail gas mixing calcination device that double-hearth kiln used, includes the double-hearth kiln body, the double-hearth kiln body includes two kiln bodies and is used for the intercommunication two the siphunculus of kiln bodies, be equipped with combustion chamber in the kiln body, the outside of kiln body is equipped with annular shell, annular shell with form annular cavity between the kiln body, two annular shell is linked together through the connecting pipe, be equipped with on the connecting pipe with the buggy case that the connecting pipe is linked together, the connecting pipe is equipped with two drive arrangement for carry the buggy to in the annular cavity, be equipped with on the annular shell with the high-pressure stove tail trachea that the annular cavity is linked together, the outer wall winding of kiln body be equipped with the pipe that the annular cavity is linked together, the lower extreme of pipe passes the kiln body and set up in the combustion chamber. The driving device comprises two motors which are arranged in the connecting pipe in a relative mode, the output ends of the two motors are respectively provided with a rotating shaft, and spiral pushing blades are arranged on the rotating shafts. The coal dust box is characterized in that two first through holes are formed in the bottom of the coal dust box, second through holes communicated with the first through holes are formed in the connecting pipe, sliding grooves are formed in two sides of the coal dust box, the two sliding grooves are respectively communicated with the two first through holes, and a baffle is arranged in the two sliding grooves in a sliding mode. The guide pipe comprises a vertical pipe and an arc pipe, wherein the upper end of the vertical pipe penetrates through the annular shell and is communicated with the annular cavity, the lower end of the vertical pipe is communicated with the upper end of the arc pipe, the arc pipe is wound on the outer side of the kiln body, and the lower end of the arc pipe penetrates through the kiln body and is arranged in the combustion chamber. Compared with the prior art, the utility model has the beneficial effects that: 1. the coal powder and the tail gas of the calcium carbide furnace are adopted for mixed combustion, so that the combustion efficiency is improved, and the waste gas can be recycled again. 2. By winding the guide pipe in the kiln body, the mixed combustion in the kiln body is preheated, so that the mixed combustion is easier to burn after entering the combustion chamber. 3. The pulverized coal and the tail gas pipe of the high-pressure calcium carbide furnace are matched, so that the fuel is matched and flexibly distributed, and the fuel proportion is flexibly adjusted. Drawings Fig. 1 is a schematic structural diagram of a coal dust and calcium carbide furnace tail gas mixing and calcining device used in a double-hearth kiln. Fig. 2 is a schematic view of the installation of the catheter of the present utility model. Detailed Description The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. Examples: Referring to fig. 1 to 2, a coal dust and calcium carbide furnace tail gas mixing calcination device for a double-hearth kiln is disclosed, which comprises a double-hearth kiln body 1, wherein the double-hearth kiln body 1 comprises two kiln bodies 2 and a through pipe 3 used for communicating the two kiln bodies 2, a combustion chamber 4 is arranged in the kiln bodies 2, an annul