CN201952232U - Special shaft kiln equipment for producing kiln process phosphoric acid - Google Patents
Special shaft kiln equipment for producing kiln process phosphoric acid Download PDFInfo
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- CN201952232U CN201952232U CN2010206476095U CN201020647609U CN201952232U CN 201952232 U CN201952232 U CN 201952232U CN 2010206476095 U CN2010206476095 U CN 2010206476095U CN 201020647609 U CN201020647609 U CN 201020647609U CN 201952232 U CN201952232 U CN 201952232U
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Abstract
The utility model relates to special shaft kiln equipment for producing kiln process phosphoric acid, which belongs to the technical field of thermal phosphoric acid production equipment. The equipment comprises a vertical pretreatment furnace, a vertical preheating hyperthermic reduction reaction device and a nonmetal heat exchange device, wherein two rows of vertical furnace bar tubes are arranged in a hearth of the vertical pretreatment furnace, a raw material heating close-burning channel is arranged between the two rows of vertical furnace bar tubes, and a stock column is arranged above the channel; the upper part of the vertical preheating hyperthermic reduction reaction device is provided with a combustion chamber; a cavity for preheating temperature rise is arranged in the combustion chamber; the upper end of the cavity is communicated with a feeder; the lower part of the vertical preheating hyperthermic reduction reaction device is provided with a reduction reaction hearth; a plate heat exchanger made of a high temperature resistant and corrosion resistant nonmetal material which has high heat transfer efficiency is arranged in a thermal insulation wall made of a refractory material; the upper part of the heat exchanger is provided with a high temperature furnace gas inlet and a high temperature hot air inlet; and the lower part of the heat exchanger is provided with a cold air inlet and a furnace gas outlet. The special shaft kiln equipment is capable of taking low and medium-grade phosphorite as a raw material; a material preparation process is simple; the phenomena of premature combustion of reduced carbon of the raw material and white shell back sucking can be eliminated; the reduction rate and the yield of phosphorus are high; and the thermal utilization ratio is high. Slag can be used as clinker for producing cement, and no waste gas or waste water is discharged.
Description
Technical field
The utility model belongs to thermal phosphoric acid production unit technical field.
Background technology
The production of domestic thermal phosphoric acid is divided into electric furnace yellow phosphorus method and kiln method.Electric furnace yellow phosphorus method phosphoric acid will use electric furnace yellow phosphorus as raw material, and the production of electric furnace yellow phosphorus must use high-grade phosphorus ore as raw material, in low-grade phosphorus ore can not use.Producing the electric furnace that yellow phosphorus uses in addition is the resistance electric arc furnace, needs to consume very big electric weight and produces heat energy.So production cost height of electric furnace yellow phosphorus method phosphoric acid.The kiln-process phosphoric acid production unit and the corresponding technology of present domestic appearance are: (1): hubei baokang gather around with company with the CDK production technique of rotary kiln, with reference to U.S. KPA technology circuit as reduction reaction equipment.Its problem is more, and the effort debugging through for many years though obtained certain achievement, still can not be used for suitability for industrialized production, and the slag that the rotary kiln running is discharged is many silicon slag, difficult treatment.(2): Yichang three new phosphoric acid companies use the TTK production technique of tunnel furnace as reduction reaction equipment, though carried out certain industrialized production run, but also exist fuel consumption higher, raw material making complexity (need wrap up etc.), can not be well-separated between each operation, difficulty, problems such as slag silicone content height are adjusted in atmosphere control in the kiln.Because slag can not use as material of construction, the slag treatment difficulty, the accumulation of slag causes the harm certain to environment.(3) by the exploitation of Guizhou Academy of Sciences and Guizhou many Linkages scientific and technological development limited liability company, utilize " the generated by producing phosphoric acid through blast novel process " of blast furnace as reduction reaction equipment, the structures shape of its equipment product reclaim the not high of yield, still also there is more problem, needs further to improve perfect.
The utility model content
The purpose of this utility model is the shortcoming that overcomes existing kiln-process phosphoric acid production unit, and a kind of special-purpose vertical kiln equipment of producing kiln-process phosphoric acid is provided.Low-grade phosphorus ore was as raw material during this equipment can use; Can simplify the technology of getting the raw materials ready; Can eliminate in the kiln-process phosphoric acid production process, raw material reduction carbon pre-ignition phenomenon and return and inhale white shell phenomenon can improve the yield of the reduction ratio and the phosphorus of phosphorus; Production process heat utilization efficiency height; Slag calcium contents height, phosphorus content is lower than the phosphorus content in the electric furnace phosphoric slag, can be used for producing the grog of cement.
The utility model contains:
1, a vertical pre-treatment stove, its structure is: the two row's vertical heater bank tubes that are provided with water-cooled in the burner hearth, it between the two grate furnace bank tubes heating close-burning passage of raw material, it above the heating close-burning passage stock column with its perforation, the feeder of raw materials pretreatment stove is established on the stock column top, and the water-sealed valve hopper is established in heating close-burning passage lower end.
2, a vertical pre-heating temperature elevation reduction reaction device, its structure is: the housing internal upper part is the combustion chamber, be provided with one or more raw material preheating intensification cavity in the combustion chamber, raw material preheating heats up and is communicated with the feeder of pre-heating temperature elevation reduction reaction device with the cavity upper end, the bottom is the reduction reaction burner hearth in the housing, pre-heating temperature elevation connects with the lower end and the reduction reaction burner hearth of cavity, reduction reaction burner hearth top has the reducing gas outlet orifice, the reducing gas outlet orifice is communicated with the combustion chamber by pipeline, and slag discharging device is established in the watercooling jacket bottom of reduction reaction burner hearth bottom.
3, a nonmetallic heat exchange device, its structure is: establish the plate-type heat exchanger of being made by the non-metallic material high temperature resistant, corrosion-resistant, that heat transfer efficiency is high (as aluminium nitride etc.) in the refractory materials insulated wall, high-temperature furnace gas import and high-temperature hot air outlet are established in interchanger top, the interchanger bottom is established freezing air and is blasted mouth and furnace gas relief outlet, the high-temperature furnace gas import is communicated with the bottom of combustion chamber in the pre-heating temperature elevation reduction reaction device by pipeline, and the high-temperature hot air outlet is communicated with the top of combustion chamber in the pre-heating temperature elevation reduction reaction device by pipeline.The structure of said plate-type heat exchanger is known by those skilled in the art.The nonmetallic heat exchange device is equipped with conventional hydration absorption equipment and filtering and concentrating equipment and corresponding pump valve etc. when using.
Working process of the present utility model: phosphorus ore, silica, hard coal mix abrasive dust through metering, add binding agent and water, through mix compacting balling-up, after drying, pack into the feeder of pre-treatment stove, raw material enters heating close-burning passage through stock column, utilizes the low-oxygen high-temperature furnace gas with reducing atmosphere, and raw material is directly carried out the heat temperature raising drying.Raw material has been eliminated moisture and volatile component after pre-treatment, improved the temperature and the material strength of raw material.Pretreated raw material through heating after the water-sealed valve hopper of close-burning passage lower end is discharged, join the feeder of raw material preheating heating reduction reaction unit, and enter raw material preheating and heat up and to use cavity, in cavity, be warmed up to the temperature of processing requirement by indirect heating.The cavity internal heating raw material enter the reduction reaction burner hearth, during by the burner hearth epimere, raw material is heated up by concurrent heating, makes contained Vanadium Pentoxide in FLAKES carry out reduction reaction, emit element phosphor gas and CO (carbon monoxide converter) gas, these two kinds of mixed gass enter the combustion chamber use that acts as a fuel through pipeline.Slag after reduction reaction, contain a large amount of fixed carbon, drop to reduction reaction burner hearth hypomere and burn with the high temperature air that enters, the high temperature that is produced carries out the concurrent heating intensification to the raw material of burner hearth epimere, to keep the needed temperature of reduction reaction, reduction reaction can normally be proceeded.Slag remaining behind oxidizing fire is discharged through slag discharging device.The furnace gas that obtains after the internal combustion of combustion chamber enters the nonmetallic heat exchange device, carries out heat exchange with the freezing air that blasts and obtains high-temperature hot air, uses for the combustion chamber.Through the furnace gas of heat exchange cooling, enter the hydration systems recovery and obtain phosphoric acid product.
The beneficial effects of the utility model: low-grade phosphorus ore was as raw material during this equipment can use.The technology of getting the raw materials ready is simple.Can thoroughly eliminate the raw material reduction carbon pre-ignition in the kiln-process phosphoric acid production process and return the white shell phenomenon of suction.The reduction ratio of phosphorus and yield height.The thermal source that production process is used is mainly supplied with by element phosphor gas and CO (carbon monoxide converter) gas oxidizing fire that raw material reduction reaction in the production process produces.The efficiency of utilization height.The slag calcium contents height that production process produces, phosphorus content is lower than the phosphorus content in the electric furnace phosphoric slag in the slag, can be used as the grog of producing cement.No waste gas discharge of wastewater does not produce problem of environmental pollution in the production process.Production run is stable, and is lower than the operating cost of other kiln-process phosphoric acid production unit.The large percentage of equipment capacity and input, equipment fixed capital input amount is low.
Description of drawings
Fig. 1 looks cross-sectional view for the master of the vertical pre-treatment stove among the embodiment.
Fig. 2 looks cross-sectional view for the master of the vertical pre-heating temperature elevation reduction reaction device among the embodiment.
Fig. 3 looks cross-sectional view for the master of the nonmetallic heat exchange device among the embodiment.
Embodiment
See embodiment shown in the drawings.
Build refractory materials by laying bricks or stones in the outer cover of steel plate 1 of pre-treatment stove and do furnace wall 2.Being provided with between two row's vertical heater bank tubes, 7, the two grate furnace bank tubes 7 of water-cooled in the burner hearth 4 is the heating close-burning passage 5 of raw material.Heating close-burning passage 5 tops are the stock column 8 with its perforation.The band dipleg feeder 3 of pre-treatment stove is established on stock column 8 tops.Water-sealed valve hopper 6 is established in heating close-burning passage 5 lower ends.9 is close-burning tail gas relief outlet.The pre-treatment stove is equipped with conventional reignition chamber, peripherals such as heat reclamation device when using.
Vertical pre-heating temperature elevation reduction reaction device is made shell 10 by steel plate, builds refractory materials 11 in the shell 10 by laying bricks or stones.The housing internal upper part is combustion chamber 12, is provided with two raw material preheatings in the combustion chamber 12 and heats up with cavity 13, and cavity 13 upper ends are communicated with the feeder 14 that switches sealing.The bottom is a reduction reaction burner hearth 15 in the housing, and reduction reaction burner hearth 15 tops have reducing gas outlet orifice 16, and reducing gas outlet orifice 16 is communicated with combustion chamber 12 by pipeline, and slag discharging device 17 is established in watercooling jacket 21 bottoms of reduction reaction burner hearth 15 bottoms.18 chew the heat supply hole for the burning of combustion chamber 12.The furnace wall of reduction reaction burner hearth 15 is provided with the high-temperature hot-air nozzle 19 that starts usefulness.20 is the cold wind input tube.
The nonmetallic heat exchange device is made shell 22 by the steel plate of square, its inside is built refractory materials 23 by laying bricks or stones and is done insulated wall, establish the plate-type heat exchanger 24 that aluminium nitride is made in the insulated wall, high-temperature furnace gas import 25 and high-temperature hot air outlet 26 are established in interchanger 24 tops, and interchanger 24 bottoms are established freezing air and blasted mouth 27 and furnace gas relief outlet 28.The nonmetallic heat exchange device is equipped with conventional hydration absorption equipment and filtering and concentrating equipment and corresponding pump valve when using.
Above embodiment is only in order to be further described the utility model, and scope of the present utility model is not subjected to the restriction of illustrated embodiment.
Claims (4)
1. special-purpose vertical kiln equipment of producing kiln-process phosphoric acid is characterized in that containing:
(1), a vertical pre-treatment stove, its structure is: the two row's vertical heater bank tubes that are provided with water-cooled in the burner hearth, it between the two grate furnace bank tubes heating close-burning passage of raw material, it above the heating close-burning passage stock column with its perforation, the feeder of raw materials pretreatment stove is established on the stock column top, and the water-sealed valve hopper is established in heating close-burning passage lower end;
(2), a vertical pre-heating temperature elevation reduction reaction device, its structure is: the housing internal upper part is the combustion chamber, be provided with one or more raw material preheating intensification cavity in the combustion chamber, raw material preheating heats up and is communicated with the feeder of pre-heating temperature elevation reduction reaction device with the cavity upper end, the bottom is the reduction reaction burner hearth in the housing, pre-heating temperature elevation connects with the lower end and the reduction reaction burner hearth of cavity, reduction reaction burner hearth top has the reducing gas outlet orifice, the reducing gas outlet orifice is communicated with the combustion chamber by pipeline, and slag discharging device is established in the watercooling jacket bottom of reduction reaction burner hearth bottom;
(3), a nonmetallic heat exchange device, its structure is: establish the plate-type heat exchanger of being made by the non-metallic material high temperature resistant, corrosion-resistant, that heat transfer efficiency is high in the refractory materials insulated wall, high-temperature furnace gas import and high-temperature hot air outlet are established in interchanger top, the interchanger bottom is established freezing air and is blasted mouth and furnace gas relief outlet, the high-temperature furnace gas import is communicated with the bottom of combustion chamber in the pre-heating temperature elevation reduction reaction device by pipeline, and the high-temperature hot air outlet is communicated with the top of combustion chamber in the pre-heating temperature elevation reduction reaction device by pipeline.
2. as the special-purpose vertical kiln equipment of the said production kiln-process phosphoric acid of claim 1, it is characterized in that: establish the refractory materials furnace wall (2) of building by laying bricks or stones in the outer cover of steel plate of pre-treatment stove (1).
3. as the special-purpose vertical kiln equipment of the said production kiln-process phosphoric acid of claim 1, it is characterized in that: be provided with two raw material preheatings in combustion chamber (12) and heat up with cavity (13).
4. as the special-purpose vertical kiln equipment of the said production kiln-process phosphoric acid of claim 1, it is characterized in that: the nonmetallic heat exchange device has the outer cover of steel plate (22) of square, its inner refractory materials insulated wall for building by laying bricks or stones is established nitrogenize aluminium-made plate type interchanger (24) in the insulated wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206476095U CN201952232U (en) | 2010-12-08 | 2010-12-08 | Special shaft kiln equipment for producing kiln process phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206476095U CN201952232U (en) | 2010-12-08 | 2010-12-08 | Special shaft kiln equipment for producing kiln process phosphoric acid |
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| Publication Number | Publication Date |
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| CN201952232U true CN201952232U (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206476095U Expired - Fee Related CN201952232U (en) | 2010-12-08 | 2010-12-08 | Special shaft kiln equipment for producing kiln process phosphoric acid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923679A (en) * | 2012-10-29 | 2013-02-13 | 刘玉姣 | High-temperature heat storage gasification kiln |
| CN103952535A (en) * | 2014-03-24 | 2014-07-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Rotary kiln magnetizing roasting heat-source-free continuous reduction apparatus and use method |
| CN109573971A (en) * | 2018-12-25 | 2019-04-05 | 石家庄新华能源环保科技股份有限公司 | A kind of device producing yellow phosphorus |
-
2010
- 2010-12-08 CN CN2010206476095U patent/CN201952232U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923679A (en) * | 2012-10-29 | 2013-02-13 | 刘玉姣 | High-temperature heat storage gasification kiln |
| CN102923679B (en) * | 2012-10-29 | 2015-05-27 | 刘玉姣 | High-temperature heat storage gasification kiln |
| CN103952535A (en) * | 2014-03-24 | 2014-07-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Rotary kiln magnetizing roasting heat-source-free continuous reduction apparatus and use method |
| CN109573971A (en) * | 2018-12-25 | 2019-04-05 | 石家庄新华能源环保科技股份有限公司 | A kind of device producing yellow phosphorus |
| CN109573971B (en) * | 2018-12-25 | 2024-04-12 | 石家庄新华能源环保科技股份有限公司 | Device for producing yellow phosphorus |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20111208 |