CN201397051Y - High-temperature slag ball cooling machine used in kiln phosphoric acid production - Google Patents
High-temperature slag ball cooling machine used in kiln phosphoric acid production Download PDFInfo
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- CN201397051Y CN201397051Y CN2009200846166U CN200920084616U CN201397051Y CN 201397051 Y CN201397051 Y CN 201397051Y CN 2009200846166 U CN2009200846166 U CN 2009200846166U CN 200920084616 U CN200920084616 U CN 200920084616U CN 201397051 Y CN201397051 Y CN 201397051Y
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- air
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- kiln
- phosphoric acid
- heat exchanger
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Abstract
A high-temperature slag ball cooling machine used in the kiln phosphoric acid production comprises a casing and a grate-type conveyer; an air outlet is formed on the casing; a grate bed for bearing high-temperature slag balls is arranged on the grate-type conveyer; a dust box is arranged below the grate bed; a furnace shade is arranged above the grate bed; an air heat exchanger is arranged in thefurnace shade; an air outlet A of a blower is connected with the casing below the grate bed; and an air outlet B of the blower is connected with an inlet of the air heat exchanger. The utility model solves the problems that the cooling machine can not be in operation due to mutual bonding, the destruction of even heat exchange between gas and solid, and the clamping of a material discharge mechanism caused during the combustion of residual carbon of high-temperature slag balls, and the like in the prior art, overcomes the defect that exhausted partial oxygen obtained by heat exchange of hot air during the carbon combustion process is limited to be recycled, and has the advantages that the residual heat can be effectively recycled, the clean hot air with constant oxygen content can be provided for a rotary kiln, the mutual bonding caused during the combustion of residual carbon in the high-temperature slag balls can be avoided or lessened, and the operation is stable.
Description
Technical field
The utility model is a kind of cooling device, is specifically related to the cooler that kiln-process phosphoric acid reaction kiln is discharged the high temperature sludge ball.
Background technology
The CDK kiln-process phosphoric acid is the phosphoric acid production new technology of China's stand-alone development in recent years.Its technological principle is: powdery phosphorus ore, silica and coal three are mixed in proportion, make the composite pellet that diameter is 8～12mm, place and carry out high-temperature roasting in the rotary kiln.At this moment, the carbon in the pelletizing is reduced into elementary gas phosphorus to the phosphorus of phosphorus ore and overflows, and is oxidized to P then
2O
5, become phosphoric acid through aquation again.
1)Ca
10(PO
4)
6F
2+15C+9SiO
2→3/2P
4+15CO+9CaO·SiO
2+CaF
2；
ΔH＝28006kJ/kgP
4；
2)P
4+5O
2→2P
2O
5；ΔH＝-25498kJ/kgP
4；
3)CO+1/2O
2→2CO
2；ΔH＝-22154kJ/kgP
4；
4)P
2O
5+3H
2O→2H
3PO
4。
3. 2. 1. an advantage of kiln-process phosphoric acid technology all place above-mentioned reaction in the same equipment (for example rotary kiln) exactly and finish simultaneously, making full use of the heat that 3. 2. oxidation reaction produce, thereby greatly reduces energy consumption.Another advantage of kiln-process phosphoric acid technology in can directly using exactly, low-grade siliceous phosphorus ore, especially contains more SiO
2Siliceous phosphorus ore, very meet the characteristics of China's phosphate rock resource.
In the kiln-process phosphoric acid production process, the high temperature sludge ball is the residual ball of discharging after the rotary kiln pyroreaction, and its temperature is about 1200 ℃, and in addition, the slag ball also contains 1～3% unburnt carbon residue (in pure carbon).These slag balls will cool off with air, and remaining charcoal burning, the hot-air that is obtained uses for producing, and to utilize the heat energy of slag ball, further reduces energy consumption.Cooled slag ball can be used as light material and produces lightweight concrete, light cement building block etc. and fully utilized, or transports the slag field to and store up.
Existing 10kt/a (presses 85%H
3PO
4Meter) CDK kiln-process phosphoric acid process units, the cooling device of slag ball are shaft furnace (or claiming shaft kiln) coolers.The high temperature sludge ball adds from stove top, and cold slag ball is discharged from furnace bottom; Cold air stream then enters from furnace bottom, and hot-air is discharged from furnace roof.Both carry out countercurrent heat exchange in stove, and coal dust after-flame remaining in the slag ball.Cooled slag ball is used in addition or stores up in the slag field; The hot-air that is obtained, a part import rotary kiln as combustion air, and another part then imports chain comb drying machine and is used for the dry wet pelletizing.
After this shaft furnace cooler puts into operation, do not attain the results expected, sometimes even can't move.Its main cause is: the remaining char in the slag ball is in when burning, and often Yin Gaowen melt surface and be bonded to piece has mutually destroyed the alternate uniform heat exchange of gas-solid, when serious even stuck discharge mechanism, cooler can't be moved.In addition, the hot-air that heat exchange obtained has exhausted part oxygen when the combustion charcoal, greatly reduce its combustion-supporting effect at rotary kiln.Moreover hot-air is also carried more dust secretly, causes ring formation in the kiln again easily.
Summary of the invention
The utility model provides a kind of and recycles waste heat effectively, the constant hot-air of clean oxygen content is provided, can prevents or alleviate because the high temperature sludge ball cooler that the mutual bonding that the remaining char burning is caused in the high temperature sludge ball, stable kiln-process phosphoric acid production are used for rotary kiln.
The utility model comprises housing, air outlet is arranged on the housing, comb formula conveyer, be useful on the comb bed of carrying high temperature sludge ball on the comb formula conveyer, comb bed below is an ash bin, is bonnet above the bed of combing, and is provided with air heat exchanger in the bonnet, air blast A air outlet is connected with the housing of the bed below of combing, and the blower B air outlet is connected with the air heat exchanger import.The comb bed that is used to carry the high temperature sludge ball on the described comb formula conveyer is made up of the grate plate of a plurality of reciprocal promotions.Described air heat exchanger is for reclaiming the tubular type air heat exchanger of slag ball heat.
The utility model one end is provided with the import of high temperature sludge ball, and the other end is provided with cold slag ball outlet, and entrance point is corresponding with comb formula conveyer, and the port of export is connected mutually with the port of export of comb formula conveyer.The high temperature sludge ball enters from the entrance point of cooler, and comb formula conveyer promotes the slag ball in the mode of reciprocating and is fed forward.Air blast A is fed cold air by conveyer comb bed below, pass the high temperature sludge ball bed of material and make its cooling, consequent hot-air is derived by cooler top air outlet together with the hot-air that remaining char burning in the high temperature sludge ball produces, and delivers to chain comb drying machine with pipeline and use for the dry wet pelletizing.Blower B blasts cold air from the air heat exchanger import, the thermal radiation of the thermal current between the heat exchanger tube and the high temperature sludge ball bed of material (comprising combustion charcoal fire flame) is passed through in the air heat exchanger utilization, air in the heating flowing pipe, the clean constant hot-air of oxygen content that obtains imports rotary kiln through pipeline, as combustion air.
Compared with prior art, the utility model is stable, can prevent or alleviate because the mutual bonding that the remaining char burning is caused in the slag ball pelletizing is recycled waste heat simultaneously again effectively.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
In the accompanying drawing, be heat-exchanging chamber in the cooler housing 1, the comb formula conveyer 3 of reciprocal promotion is arranged in the heat-exchanging chamber, comb formula conveyer 3 is useful on the comb bed of carrying high temperature sludge ball, and the bed below of combing is an ash bin.The import of high temperature sludge ball is arranged on the cooler housing 1, and high temperature sludge ball entrance point is corresponding to comb formula conveyer 3, and comb formula conveyer 3 ports of export are connected with cold slag ball outlet.There is tubular type air heat exchanger 2 comb formula conveyer 3 tops, and air blast 6 is connected with 2 imports of tubular type air heat exchanger, obtain the constant hot-air of clean oxygen content and import rotary kiln through the outlet of air heat exchanger 2, as combustion air.Air blast 4 air outlets are connected with the cooler housing 1 of the bed below of combing, and on the cooler housing 1 air outlet are arranged, and air outlet is connected with exhaust blower 7.5 is the transmission device of comb formula conveyer.
In the work, a part of grate plate of comb formula conveyer 3 is constantly to move back and forth, and when promoting the high temperature sludge ball and advancing, prevents again or alleviates because the mutual bonding that the remaining char burning is caused in the high temperature sludge ball.The driving velocity of comb bed should match with adding high temperature sludge ball amount, and bed depth is remained in the suitable scope, promotes the burning of remaining char in the high temperature sludge ball.
Result of use of the present utility model: slag ball initial temperature :～1200 ℃; The slag ball is temperature eventually: 100～120 ℃; Air initial temperature: 0～25 ℃; Hot-air of the present utility model is temperature eventually :～500 ℃ (the high and low temperature section is mixed, dust-laden, dry using); The air heat exchanger hot-air is temperature eventually: 400～500 ℃ (cleaning, combustion-supporting usefulness).
Claims (3)
1, a kind of high temperature sludge ball cooler of kiln-process phosphoric acid production use, it is characterized in that: comprise housing, air outlet is arranged on the housing, grate formula conveyer is useful on the grate bed that carries the high temperature sludge ball on the grate formula conveyer, grate bed below is an ash bin, grate bed top is a bonnet, be provided with air heat exchanger in the bonnet, air blast A air outlet is connected with the housing of grate bed below, and the blower B air outlet is connected with the air heat exchanger import.
2, the high temperature sludge ball cooler that uses of kiln-process phosphoric acid production according to claim 1 is characterized in that: the grate bed that is used to carry the high temperature sludge ball on the described grate formula conveyer is made up of the grate plate of a plurality of reciprocal promotions.
3, the high temperature sludge ball cooler of kiln-process phosphoric acid production use according to claim 1 is characterized in that: described air heat exchanger is for reclaiming the tubular type air heat exchanger of slag ball heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200846166U CN201397051Y (en) | 2009-03-28 | 2009-03-28 | High-temperature slag ball cooling machine used in kiln phosphoric acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200846166U CN201397051Y (en) | 2009-03-28 | 2009-03-28 | High-temperature slag ball cooling machine used in kiln phosphoric acid production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201397051Y true CN201397051Y (en) | 2010-02-03 |
Family
ID=41619569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200846166U Expired - Fee Related CN201397051Y (en) | 2009-03-28 | 2009-03-28 | High-temperature slag ball cooling machine used in kiln phosphoric acid production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201397051Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014194568A1 (en) * | 2013-06-04 | 2014-12-11 | 四川玖长科技有限公司 | Comprehensive utilisation method for high-temperature slag balls exiting rotary kiln in kiln process for production of phosphoric acid, and process system thereof |
| CN104913652A (en) * | 2015-05-20 | 2015-09-16 | 中南大学 | Shaft furnace pellet clinker waste heat recycling method and device |
-
2009
- 2009-03-28 CN CN2009200846166U patent/CN201397051Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014194568A1 (en) * | 2013-06-04 | 2014-12-11 | 四川玖长科技有限公司 | Comprehensive utilisation method for high-temperature slag balls exiting rotary kiln in kiln process for production of phosphoric acid, and process system thereof |
| CN104211425A (en) * | 2013-06-04 | 2014-12-17 | 四川玖长科技有限公司 | Comprehensive utilization method of high temperature slag balls discharged from rotary kiln in kiln method phosphoric acid technology and process system |
| CN104211425B (en) * | 2013-06-04 | 2015-12-02 | 四川玖长科技有限公司 | Method of comprehensive utilization and the process system thereof of rotary kiln high temperature sludge ball is gone out in kiln-process phosphoric acid technique |
| RU2643117C2 (en) * | 2013-06-04 | 2018-01-30 | Сычуань Ко Чанг Технолоджи Ко., Лтд | Universal method for using slag balls heated to high temperature obtained from rotary furnace for production of phosphoric acid, and technological process of such application |
| US10101087B2 (en) | 2013-06-04 | 2018-10-16 | Sichuan Ko Chang Technology Co., Ltd. | Method of comprehensively utilizing high-temperature slag balls exiting rotary kiln in kiln process for producing phosphoric acid, and process system thereof |
| CN104913652A (en) * | 2015-05-20 | 2015-09-16 | 中南大学 | Shaft furnace pellet clinker waste heat recycling method and device |
| CN104913652B (en) * | 2015-05-20 | 2016-11-30 | 中南大学 | A kind of method of Shaft Furnace Pelletizing Process grog waste heat recovery and device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUBEI YAOZHIHE CHEMICAL CO., LTD. Free format text: FORMER OWNER: XIANGFAN YONGHE PHOSPHATE TECHNOLOGY CO., LTD. Effective date: 20111121 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 441600 XIANGFAN, HUBEI PROVINCE TO: 441614 XIANGFAN, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111121 Address after: Yaozhihe village Maqiao town of Xiangyang city in 441614 Baokang County in Hubei Province Patentee after: HUBEI YAOZHIHE CHEMICAL CO., LTD. Address before: 441600 West Road, Chengguan town of Baokang County of Hubei Province Patentee before: Xiangfan Yonghe Phosphate Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20170328 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |