CN212375177U - Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln - Google Patents
Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln Download PDFInfo
- Publication number
- CN212375177U CN212375177U CN202021742671.2U CN202021742671U CN212375177U CN 212375177 U CN212375177 U CN 212375177U CN 202021742671 U CN202021742671 U CN 202021742671U CN 212375177 U CN212375177 U CN 212375177U
- Authority
- CN
- China
- Prior art keywords
- tower type
- shaft kiln
- pipeline
- flue gas
- combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Furnace Details (AREA)
Abstract
The high-efficiency environment-friendly tower type mixed-combustion light-combustion magnesium shaft kiln comprises a shaft kiln body, an outer combustion chamber, an inner combustion chamber, a tower type distributor, a flue gas tower type flow equalizer, a porous flue gas pipeline, a air mixing chamber, a cooling air tower type flow divider, a hot air pipeline, a combustion chamber flue gas pipeline, a smoke exhaust pipeline, an upper storage bin and a homogeneous settling chamber. Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a set up two combustion chambers and improve the heat exchange efficiency between material and high temperature flue gas, satisfying under the prerequisite of product quality and output, reduce the stove energy consumption, improve energy utilization efficiency, reduce the environmental protection problem that non-metallic mineral produced at the light-burning in-process, combine the material to pile up the angle simultaneously, adopt tower structure easily balanced atress, play the effect of balanced distribution to gases such as hot-blast and flue gas, improve the stove life-span.
Description
Technical Field
The utility model belongs to the technical field of non-metallic ore sintering in shaft kiln, especially, relate to a tower type mixed combustion light-burning magnesium shaft kiln of high-efficient environmental protection.
Background
The magnesite resources in China are rich, the first place in the world, the storage capacity of magnesite is at 36.42 hundred million tons, which accounts for 28.85 percent of the total storage capacity in the world, the magnesite resources in China are mainly distributed in Liaoning, Shandong and other areas, especially the storage capacity of magnesite in Liaoning large stone bridge and Haicheng area is the most rich, the magnesite is lightly burned at 750-.
The magnesite is lightly burned by adopting a reverberatory furnace kiln in the early stage of China, the product quality is unstable, the energy consumption is large, the environmental pollution is serious, and the magnesite is gradually eliminated for use at present.
The suspension furnace roasting technology is favored by enterprises due to fast heat exchange, low heat consumption, stable product quality and the like, but the problems of poor raw material adaptability, easy material blockage, difficult material collection and the like are caused by the structural characteristics, so that the suspension furnace planned and constructed in Liaoning areas is about twenty seats at present, but the continuous and stable production is not much.
In recent years, the production of light-burned magnesia by using a shaft kiln has been paid more attention to the small pollution, low energy consumption and stable product quality.
The current relevant patents and known technical literature situations of light-burned magnesia are as follows:
patent CN 103435277B discloses "an internal gas-fired shaft kiln for producing light-burned magnesia and method", in which a combustion chamber is arranged in the kiln, then cooling air introduced into the bottom of the kiln body exchanges heat with falling materials and enters the combustion chamber, the inner-tube burner has a certain height, so that a constant temperature region with a certain height can be formed in the hearth, but due to the generation of high-temperature flue gas from the center of the kiln, the material near the furnace wall may be under-burned.
Patent CN 106045346B discloses a porous internal combustion shaft kiln, which mainly solves the problems of small capacity, high energy consumption, high pollution and the like of a reflection shaft kiln, the core of the technical scheme is that 2-10 light burning holes and 3-11 internal combustion chambers are arranged in the shaft kiln, the falling materials are preheated and pyrolyzed by exchanging heat with high-temperature waste gas, and the materials are cooled by an internal heat exchanger at the lower part of a kiln body. Because the combustion air at the lower part of the kiln body and the materials adopt an indirect heat exchange mode, the heat exchange efficiency is lower, and the materials can take away part of heat to cause loss.
Patent CN 108168292B discloses a multifunctional environmental protection type BSK sintering technology shaft kiln and a use method thereof, the design idea lies in that the combustion and heat transfer processes are separated, a heating bridge technology is adopted in the kiln, a boiling fluidization technology is adopted in a cooling section, and the design idea lies in that the application range of raw material granularity is large, the product quality is good, the yield is high, energy is saved, and the environment is protected. However, because the heat exchange area between the flue gas and the material is small, the flue gas can be lifted by selecting a flow channel with small material resistance in the heat exchange process with the material, the condition of under-burning due to uneven heating of the material can be caused, and meanwhile, the moving bed is adopted at the upper end of the kiln, and the boiling fluidization technology is adopted at the lower end of the kiln, which can be difficult to realize.
SUMMERY OF THE UTILITY MODEL
The utility model provides a tower co-combustion light-burning magnesium shaft kiln of high-efficient environmental protection, through setting up two combustion chambers and improving the heat exchange efficiency between material and high temperature flue gas, satisfying under the prerequisite of product quality and output, reduce the stove energy consumption, improve energy utilization efficiency, reduce the environmental protection problem that non-metallic mineral produced at the light-burning in-process, combine the material to pile up the angle simultaneously, adopt tower structure easily balanced atress, play the effect of balanced distribution to gases such as hot-blast and flue gas, improve the stove life-span.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a high-efficient environmental protection's tower type co-combustion light-burned magnesium shaft kiln, includes shaft kiln furnace body, outer combustion chamber, interior combustion chamber, tower distributing device, flue gas tower current equalizer, porous flue gas pipeline, mixing chamber, cooling wind tower shunt, hot-blast pipeline, combustion chamber flue gas pipeline, exhaust pipe, goes up feed bin, homogeneity settling chamber, it sets up the upper end at the shaft kiln furnace body to go up the feed bin, tower distributing device, interior combustion chamber, mixing chamber, cooling wind tower shunt set gradually in the shaft kiln furnace body from last to down, go up the below of feed bin, porous flue gas pipeline and flue gas tower current equalizer connect between tower distributing device and interior combustion chamber, mixing chamber connects the lower extreme at interior combustion chamber be connected with the tedge between cooling wind tower shunt and the mixing chamber, cooling wind tower shunt bottom connection cooling wind supply pipe, hot-blast pipeline connects between the lower part and the homogeneity settling chamber of shaft kiln furnace body, the upper end of the homogeneous settling chamber is respectively connected with an outer combustion chamber and a wind mixing chamber through pipelines, the outer combustion chamber is connected with the shaft kiln body through a pipeline, and a smoke exhaust pipeline is connected to the upper end of the shaft kiln body.
The tower distributor, the flue gas tower type flow equalizer, the air mixing chamber and the cooling air tower type flow divider are all of conical structures.
A plurality of smoke exhaust holes are distributed on the porous smoke pipeline and the smoke tower type flow equalizer, the pore diameter of each smoke exhaust hole is gradually reduced from bottom to top, and the large heat exchange strength at the middle part and the small heat exchange strength at the upper part of the kiln are mainly ensured.
And a discharge hopper is arranged at the bottom of the shaft kiln body.
And a regulating valve is arranged on a pipeline leading from the homogeneous settling chamber to the outer combustion chamber.
The vertical kiln furnace body is installed and positioned through the vertical kiln working platform and the furnace structure upright post.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model relates to a tower type co-combustion light-burning magnesium shaft kiln of high-efficient environmental protection improves the heat exchange efficiency between material and high temperature flue gas through setting up two combustion chambers, satisfying under the prerequisite of product quality and output, reduce the stove energy consumption, improve energy utilization efficiency, reduce the environmental protection problem that non-metallic mineral produced at the light-burning in-process, combine the material to pile up the angle simultaneously, adopt tower structure easily balanced atress, play balanced distribution's effect to gases such as hot-blast and flue gas, improve the stove life-span.
Drawings
FIG. 1 is a schematic structural view of a tower-type mixed-combustion light-combustion magnesium shaft kiln of the utility model.
Fig. 2 is a schematic structural diagram of a porous flue gas pipeline and a flue gas tower-type flow equalizer.
In the figure: 1-feeding bin, 2-tower distributor, 3-external combustion chamber, 4-combustion chamber flue gas pipeline, 5-homogeneous settling chamber, 6-hot air pipeline, 7-cooling air tower type flow divider, 8-cooling air feeding pipeline, 9-discharging hopper, 10-secondary discharging hopper, 11-smoke discharging pipeline, 12-porous flue gas pipeline, 13-internal combustion chamber, 14-air mixing chamber, 15-refractory furnace lining, 16-steel plate furnace wall, 17-shaft furnace working platform, 18-furnace kiln structure upright post, 19-discharging belt, 20-secondary discharging belt, 21-dust remover, 22-chimney and 23-flue gas tower type flow equalizer.
Detailed Description
The following embodiments are further described in detail:
as shown in figures 1 and 2, the high-efficiency environment-friendly tower type mixed combustion light-burned magnesia shaft kiln comprises a shaft kiln body, an outer combustion chamber 3, an inner combustion chamber 13, a tower type distributor 2, a flue gas tower type current equalizer 23, a porous flue gas pipeline 12, a wind mixing chamber 14, a cooling wind tower type current divider 7, a hot air pipeline 6, a combustion chamber flue gas pipeline 4, a smoke exhaust pipeline 11, an upper storage bin 1 and a homogenizing settling chamber 5, wherein the upper storage bin 1 is arranged at the upper end of the shaft kiln body, the tower type distributor 2, the inner combustion chamber 13, the wind mixing chamber 14 and the cooling wind tower type current divider 7 are sequentially arranged in the shaft kiln body and below the upper storage bin 1 from top to bottom, the porous flue gas pipeline 12 and the flue gas tower type current equalizer 23 are connected between the tower type distributor 2 and the inner combustion chamber 13, the wind mixing chamber 14 is connected at the lower end of the inner combustion chamber 13, and a riser pipe 14 is connected between the cooling wind tower type, the bottom of the cooling air tower type flow divider 7 is connected with a cooling air supply pipeline 8, the hot air pipeline 6 is connected between the lower part of the shaft kiln body and the homogeneous settling chamber 5, the upper end of the homogeneous settling chamber 5 is respectively connected with the outer combustion chamber 3 and the air mixing chamber 14 through pipelines, the outer combustion chamber 3 is connected with the shaft kiln body through a pipeline, and the smoke exhaust pipeline 11 is connected with the upper end of the shaft kiln body.
The utility model discloses set up respectively at the inside and outside of shaft kiln furnace body and burn room 13 and outer combustion chamber 3, the high temperature flue gas that produces from inside and outside combustion chamber carries out the heat exchange from shaft kiln furnace body central zone territory and peripheral region and the material of whereabouts simultaneously, guarantees that the material is heated evenly, improves the heat exchange efficiency between flue gas and material.
The tower distributor 2, the flue gas tower-type flow equalizer 23, the air mixing chamber 14 and the cooling air tower-type flow divider 7 are all in a conical structure.
The conical tower structure has the advantages of uniform gas distribution, small material resistance, uniform material distribution for solid particles, less segregation and easiness in material descending.
The main purpose of the air mixing chamber 14 is to increase the temperature of the combustion air of the inner combustion chamber 13 by introducing hot air, reducing fuel consumption.
A plurality of smoke exhaust holes are distributed on the porous smoke pipeline 12 and the smoke tower type flow equalizer 23, the pore diameter of each smoke exhaust hole is gradually reduced from bottom to top, and the large heat exchange strength at the middle part and the small heat exchange strength at the upper part of the kiln are mainly ensured.
And a discharge hopper 9 is arranged at the bottom of the shaft kiln body.
And a regulating valve is arranged on a pipeline leading from the homogeneous settling chamber 5 to the outer combustion chamber 3. The dedusted hot air is used as combustion air to be supplied to the outer combustion chamber 3 and the inner combustion chamber 13 respectively, and the adjusting valve is used for adjusting the hot air input amount of the two combustion chambers.
The vertical kiln furnace body is arranged and positioned through the vertical kiln working platform 17 and the furnace structure upright post 18. The inner lining of the shaft kiln body is a refractory lining 15, and the outer part is a steel plate furnace wall 16.
The material transports the furnace top through the material loading belt, gets into in the shaft kiln furnace body through material loading bin 1 again, prevents through the sealed cabin that the dust from overflowing between material loading bin 1 and the material loading belt, sets up the observation hole in the sealed cabin side. The lower part of the upper material bin 1 is provided with a tower type distributing device 2, a smoke exhaust pipeline 11 is arranged near the tower type distributing device 2, an inner combustion chamber 13 is arranged below the tower type distributing device 2, a porous smoke pipeline 12 and a smoke tower type current equalizer 23 are connected between the inner combustion chamber 13 and the tower type distributing device 2, the aperture of an upper smoke exhaust hole is 2-3mm, the aperture of a lower smoke exhaust hole is 4-6mm, the outer walls of the porous smoke pipeline 12 and the smoke tower type current equalizer 23 are made of steel plates, the inner lining is made of refractory materials, and the lower part of the inner combustion chamber 13 is provided with a gas pipeline and a wind mixing chamber 14. The lower part of the kiln body is sequentially provided with a cooling air supply pipeline 8, a hot air pipeline 6 and a high-temperature flue gas pipeline 4 generated by the combustion chamber from bottom to top. The lower part of the kiln body is provided with two discharging hoppers 9, corresponding discharging belts 19 are respectively arranged below each discharging hopper 9, the two discharging belts 19 feed materials to the secondary discharging hopper 10, and a secondary discharging belt 20 is arranged below the secondary discharging hopper 10.
A production process of a tower type mixed combustion light-burning magnesium shaft kiln with high efficiency and environmental protection comprises the following steps:
1) the material gets into the shaft kiln furnace body through last feed bin 1, then through tower distributing device 2 evenly distributed around the shaft kiln furnace body cavity, falls the in-process and carries out heat exchange against the current with the flue gas that rises and is heated down, and the product after the material pyrolysis is discharged to the transportation belt after by lower part air cooling, then delivers to next process through the transportation belt.
The material is conveyed to the top of the furnace through a feeding belt and then enters the furnace from a feeding bin 1 at the top of the furnace, and when the material is at the upper part of the furnace, the material and high-temperature flue gas are preheated to 150-200 ℃ after countercurrent heat exchange, and the area belongs to a preheating zone, and the drying and preheating of the material are completed in the area. The temperature of the preheated materials is continuously raised in the falling process, high-temperature smoke fed from the inner combustion chamber 13 and the outer combustion chamber 3 exchanges heat with the materials simultaneously, the heat exchange area is enlarged, the heat exchange efficiency is improved, when the materials reach the middle part of the furnace kiln, the materials are heated to 900-.
2) Cooling air enters the cooling air tower type flow equalizer 7 and then is divided into two parts, one part of cooling air uniformly enters the lower part of the shaft kiln body from the side surface of the cooling air tower type flow equalizer 7 and goes upwards to perform heat exchange with materials, so as to achieve the purpose of cooling the materials, the cooling air after heat exchange with the materials enters the homogenizing settling chamber 5 through the hot air pipeline 6 to reduce dust, and then is divided into two parts, one part of cooling air is used as combustion-supporting air to enter the outer combustion chamber 3, and the other part of cooling air enters the air mixing chamber 14; the other strand of cooling air in the cooling air tower type flow equalizer 7 enters the air mixing chamber 14 through the ascending pipe; the air in the air mixing chamber 14 is taken as combustion air to enter the inner combustion chamber 13; the flue gas that outer combustion chamber 3 produced lets in shaft kiln furnace body middle part and heats the material, and the flue gas that inner combustion chamber 13 produced gets into the upper portion and heats the material in the shaft kiln furnace body through porous flue gas pipeline 12 and the exhaust port on the tower current equalizer 23 of flue gas.
The cooling air and the materials are subjected to heat exchange to form hot air, then the hot air passes through a hot air pipeline 6 and a homogeneous settling chamber 5 and then respectively enters an outer combustion chamber 3 and a gas mixing chamber 14, and the hot air is used as combustion air and fuel gas to perform combustion reaction to generate high-temperature flue gas.
3) The waste gas after heat exchange enters the dust remover 21 through the smoke exhaust pipeline 11, and is discharged through the chimney 23 after dust removal of the dust remover 21 reaches the emission standard.
After the flue gas supplied and discharged from the smoke exhaust pipeline 11 at the upper part of the furnace kiln is subjected to dust removal treatment, the flue gas meets the emission standard and is then discharged from a chimney 22.
The implementation case is as follows:
on the basis of a light-burning magnesium kiln with the original capacity of 20t/d, the tower structure and the double combustion chambers are adaptively transformed, the output of the transformed shaft kiln is still 20t/d, the ratio of hot air supplied to the outer combustion chamber 3 to the inner combustion chamber 13 is 7:3, gas fuel is coal gas, the raw materials entering the kiln before transformation are mainly large lump materials with the diameter of more than 150mm, the particle size distribution of the raw materials after transformation is mainly 15-30mm, 20-40mm, 30-60mm and 40-80mm, the service life of the kiln is at least 1 year, the product ignition loss rate is below 3 percent, the energy consumption of the transformed shaft kiln is reduced from 280kgce/t to 200kgce/t, and the energy-saving effect is obvious.
Claims (6)
1. The high-efficiency environment-friendly tower type mixed combustion light-burned magnesium shaft kiln is characterized by comprising a shaft kiln body, an outer combustion chamber, an inner combustion chamber, a tower type distributor, a flue gas tower type current equalizer, a porous flue gas pipeline, a wind mixing chamber, a cooling wind tower type current divider, a hot air pipeline, a combustion chamber flue gas pipeline, a smoke exhaust pipeline, an upper material bin and a homogeneous settling chamber, wherein the upper material bin is arranged at the upper end of the shaft kiln body, the tower type distributor, the inner combustion chamber, the wind mixing chamber and the cooling wind tower type current divider are sequentially arranged in the shaft kiln body and below the upper material bin from top to bottom, the porous flue gas pipeline and the flue gas tower type current equalizer are connected between the tower type internal combustion distributor and the combustion chamber, the wind mixing chamber is connected at the lower end of the combustion chamber, an ascending pipe is connected between the cooling wind tower type current divider and the wind mixing chamber, and a cooling wind feeding pipeline is, the hot air pipeline is connected between the lower part of the shaft kiln body and the homogenizing settling chamber, the upper end of the homogenizing settling chamber is respectively connected with the outer combustion chamber and the air mixing chamber through pipelines, the outer combustion chamber is connected with the shaft kiln body through a pipeline, and the smoke exhaust pipeline is connected to the upper end of the shaft kiln body.
2. The efficient and environment-friendly tower type mixed combustion light-burned magnesium shaft kiln as claimed in claim 1, wherein the tower distributor, the flue gas tower type flow equalizer, the air mixing chamber and the cooling air tower type flow divider are all of a conical structure.
3. The efficient and environment-friendly tower type mixed-combustion light-combustion magnesium shaft kiln as claimed in claim 1, wherein a plurality of smoke exhaust holes are distributed on the porous smoke pipeline and the smoke tower type flow equalizer, and the pore diameter of the smoke exhaust holes is gradually reduced from bottom to top.
4. The efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln as claimed in claim 1, wherein a discharge hopper is arranged at the bottom of the shaft kiln body.
5. The efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln as claimed in claim 1, wherein a regulating valve is arranged on a pipeline leading from the homogeneous settling chamber to the external combustion chamber.
6. The efficient and environment-friendly tower type mixed combustion light-burned magnesium shaft kiln as claimed in claim 1, further comprising a shaft kiln working platform and a kiln structure upright post, wherein the shaft kiln body is installed and positioned through the shaft kiln working platform and the kiln structure upright post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021742671.2U CN212375177U (en) | 2020-08-20 | 2020-08-20 | Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021742671.2U CN212375177U (en) | 2020-08-20 | 2020-08-20 | Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212375177U true CN212375177U (en) | 2021-01-19 |
Family
ID=74173210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021742671.2U Active CN212375177U (en) | 2020-08-20 | 2020-08-20 | Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212375177U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777343A (en) * | 2020-08-20 | 2020-10-16 | 中钢集团鞍山热能研究院有限公司 | Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln and production process thereof |
-
2020
- 2020-08-20 CN CN202021742671.2U patent/CN212375177U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777343A (en) * | 2020-08-20 | 2020-10-16 | 中钢集团鞍山热能研究院有限公司 | Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln and production process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106892578B (en) | A kind of full recycling CO2Lime kiln device | |
| US20210078869A1 (en) | Method for preparing calcium oxide using a multistage suspension preheater kiln | |
| CN110117013A (en) | A kind of active carbon preparation system | |
| CN109437608A (en) | A kind of two-way wind built-in heat exchanger lime shaft kiln and its method for calcinating | |
| CN116659249A (en) | External channel supporting type double-chamber lime kiln for mixing and blowing and production method | |
| CN106916599A (en) | A kind of iron coke process units and method | |
| CN206940740U (en) | A kind of active powder lime suspension calcining device | |
| CN212375177U (en) | Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln | |
| CN104891831B (en) | Energy-saving environment-friendly active lime roasting shaft kiln | |
| CN101122388A (en) | Method and device for making fluid bed to produce super high-temperature fume | |
| CN111777343A (en) | Efficient and environment-friendly tower type mixed combustion light-burning magnesium shaft kiln and production process thereof | |
| CN109824227A (en) | A kind of sludge cleaning method for pyrolysis | |
| CN109160749A (en) | Circulation fine grained lime shaft kiln and its method for calcinating in a kind of | |
| CN103468934B (en) | Powdery difficulty selects iron ore of low ore grade multistage fluidised form magnetizing roasting method | |
| CN102079982B (en) | Production method of formed coke | |
| CN205324623U (en) | Quick calcination regeneration system of energy -saving tuber pipe cooled casting sand | |
| CN100547091C (en) | A kind of method of iron ore sintering ignition | |
| CN110671931A (en) | System and method for recycling hot waste gas of rotary hearth furnace | |
| CN108168292B (en) | Multifunctional environment-friendly BSK sintering technology shaft kiln and use method thereof | |
| CN210773380U (en) | Rotary hearth furnace hot exhaust gas circulation utilization system | |
| CN203487047U (en) | Internal fuel gas combustion shaft kiln for producing light calcined magnesia | |
| CN2818492Y (en) | Producer for oxidation pelletizing | |
| CN2666909Y (en) | Energy-saving environment protection active lime burning-in shaft kiln | |
| CN101713032A (en) | Method for preparing magnesium metal by multi-layer energy-saving reducing furnace | |
| CN210885339U (en) | Carbide slag calcining system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |