CN203857822U - Device for cooling clinker through liquid oxygen and liquid nitrogen and for cement kiln - Google Patents
Device for cooling clinker through liquid oxygen and liquid nitrogen and for cement kiln Download PDFInfo
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- CN203857822U CN203857822U CN201420289230.XU CN201420289230U CN203857822U CN 203857822 U CN203857822 U CN 203857822U CN 201420289230 U CN201420289230 U CN 201420289230U CN 203857822 U CN203857822 U CN 203857822U
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- Prior art keywords
- air
- liquid nitrogen
- input interface
- liquid oxygen
- high temperature
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 238000001816 cooling Methods 0.000 title claims abstract description 70
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000007788 liquid Substances 0.000 title claims abstract description 52
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 49
- 239000004568 cement Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 5
- 239000013078 crystal Substances 0.000 abstract description 13
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 16
- 239000001301 oxygen Substances 0.000 description 16
- 229910052760 oxygen Inorganic materials 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 206010011469 Crying Diseases 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical group [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The utility model discloses a device for cooling clinker through liquid oxygen and liquid nitrogen and for a cement kiln. The device is characterized in that a liquid oxygen input connector is arranged in a high-temperature cooling region of a grate cooler of the cement kiln, and a liquid nitrogen input connector is arranged in a medium-temperature cooling region. The cooling rate of the clinker is increased through feeding of the liquid oxygen, the high-temperature clinker is quickly cooled, decomposition of C3S at the temperature of 1250 DEG C is reduced or avoided, MgO crystallization is reduced or avoided, and stability of the clinker is improved; growth of C3S crystals is avoided, and grindability of the clinker is improved; C2S crystal transformation is effectively avoided or reduced through feeding of the liquid nitrogen.
Description
Technical field
The utility model relates to cement kiln oxygen-enriched combusting field, and particularly a kind of cement kiln utilizes the device of liquid oxygen and the cooling grog of liquid nitrogen, is a kind of device that utilizes liquid oxygen and the cooling grog of liquid nitrogen and strengthen the burning of preheating in rotary kiln decomposing system.
Background technology
Oxygen-enriched combusting refers in the burning than in the high oxygen-enriched air of air (containing oxygen 20.9%) oxygen concentration: it is an energy-efficient combustion technology, in glass industry, metallurgical industry and Thermal Power Engineering Field, all has application.Conventionally in air, only have 20.9% oxygen, fuel because anoxic can reduce caloric value, causes energy waste when air burning: coal (comprising oil product, natural gas) obtains best efficiency of combustion when 26%～31% oxygen concentration.Oxygen-enriched combusting mechanism is that high-concentration oxygen is sent in combustion apparatus, improves the oxygen content of combustion air, thereby improves kiln efficiency of combustion, makes fuel in oxygen-enriched combusting, change into greatly heat energy.
Along with the aggravation of global energy crisis, rising steadily of fuel price and improving constantly of environmental requirement, the production cost of enterprise is more and more higher, and energy-saving and cost-reducing and protection of the environment is the major issue of each enterprise development.Oxygen-enriched combusting is as newer combustion technology at the premium properties aspect energy-conservation and reduction of discharging, and the application aspect industrial furnace has obtained popularization energetically.Along with cement production enterprise energy-saving and emission-reduction put more effort, reduce energy resource consumption and become the important means reducing costs, oxygen-enriched combustion technology reaches its maturity.
The patent of invention of publication number CN102434890 has been introduced employing membrane separation technique, and in air, the oxygen rich gas of two kinds of different purity is obtained in separation, then sends into respectively the different portions of the multicenter combustor of cement rotary kiln
Position, carries out oxygen-enriched combustion-supporting.This invention without improving existing burner, strengthened the modulability of oxygen-enriched combusting.Yet improving and improving under the prerequisite of combustibility, cement kiln also will solve another problem, prevent exactly the excessive decomposition of tricalcium silicate when temperature surpasses 1250 ℃ and prevent or reduced MgO crystal and separated out, improve grog stability; Prevent C
3the crystal of S is grown up, and improves the grindability of grog.In addition, rotary kiln clinker, at the middle-temperature section of grate-cooler, also needs to solve C
2the crystal formation transfer problem of S, is especially producing high C
2during S grog product, more need by cooling rapidly mode, make grog interval by crystal formation inversion temperature fast, therefore cement kiln is provided with clinker cooling section, its objective is the grog of high temperature is carried out cooling, to improve above-mentioned problem, but current cooling section adopts, what be that powerful Air cooler uses is natural air, and along with the variation of environment temperature exists cooling energy consumption large, the unsettled problem of cooling effect, and then affect the problem of cement product quality.
Summary of the invention
The purpose of this utility model is to provide the device that a kind of cement kiln utilizes liquid oxygen and the cooling grog of liquid nitrogen.It is a kind of device that utilizes liquid oxygen and the cooling grog of liquid nitrogen and strengthen the burning of preheating in rotary kiln decomposing system.
To achieve these goals, the technical solution of the utility model is:
A kind of cement kiln utilizes the device of liquid oxygen and the cooling grog of liquid nitrogen, comprise cement-kiln grate-cooler, the high temperature chamotte of cement kiln falls into cement-kiln grate-cooler from rotary kiln out, described cement-kiln grate-cooler is sequentially set with high temperature cooling area, middle temperature drop warm area, low temperature cooling area, described high temperature chamotte is through high temperature cooling area, behind middle temperature drop warm area and low temperature cooling area, proceed to next process section, in described grate-cooler high temperature cooling area and middle temperature drop warm area, be respectively arranged with air-cooled air blast, on the output of the air-cooled air blast in described high temperature cooling area or input channel, be provided with liquid oxygen input interface, on the output of the air-cooled air blast of described middle temperature drop warm area or input channel, be provided with liquid nitrogen input interface, a liquid oxygen source is connected with liquid oxygen input interface by liquid oxygen tube connector, a liquid nitrogen source is connected with liquid nitrogen input interface by liquid nitrogen connecting tube, a control circuit is controlled liquid oxygen and the ratio of sending into of air and the ratio of sending into of liquid nitrogen and air according to the temperature of high temperature cooling area and middle temperature drop warm area.
Scheme is further: described control circuit comprises industrial control unit (ICU), air velocity transducer, flow control electromagnetic valve, variable frequency power controller, temperature sensor;
When liquid oxygen input interface and liquid nitrogen input interface are separately positioned on air blast output channel, at the air-cooled air blast output channel in described high temperature cooling area from air blast delivery outlet to the air-cooled air blast delivery outlet of temperature drop warm area liquid oxygen input interface and described to the described air velocity transducer that is provided for respectively measuring air quantity liquid nitrogen input interface;
When liquid oxygen input interface and liquid nitrogen input interface are separately positioned on air blast input channel, described high temperature cooling area air-cooled air blast input channel air inlet between liquid oxygen input interface and the air-cooled air blast input channel of described middle temperature drop warm area air inlet to the described air velocity transducer that is provided for respectively measuring air quantity between liquid nitrogen input interface;
On described liquid oxygen tube connector and liquid nitrogen connecting tube, be respectively arranged with described flow control electromagnetic valve, what the motor of described air-cooled air blast connected is described variable frequency power controller, the high temperature cooling area of described grate-cooler and middle temperature drop warm area are respectively arranged with described temperature sensor, described air velocity transducer, temperature sensor are connected to the signal input circuit of industrial control unit (ICU), and the control output circuit of described industrial control unit (ICU) connects respectively variable frequency power controller, flow control electromagnetic valve.
The utility model compared with prior art tool has the following advantages:
The advantage that liquid oxygen passes into:
1, accelerated the heat exchange of grog, make high temperature chamotte quenching, prevent or reduce C3S the decomposition of 1250 ℃, prevent or reduced MgO crystal and separated out, improve grog stability; Prevent C
3the crystal of S is grown up, and improves the grindability of grog.
2, passing into of liquid oxygen reduces the ignition temperature of fuel and reduces the tail-off time, accelerates burning velocity, promotes burning completely; Make flame there is higher flame temperature and blackness simultaneously.
3, reduce excess air coefficient, reduce the exhaust gas volumn after burning.
The advantage that liquid nitrogen passes into:
Effectively prevent or reduced C
2the crystal transfer of S.At grog, during through 500 ℃ of left and right temperature sections, passing into of liquid nitrogen, makes grog fast by this temperature section, has effectively prevented β-C
2s is to γ-C
2the crystal transfer of S, has prevented the powder phenomenon-tion of grog, has improved the intensity of grog.
Below in conjunction with drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is that the utility model cement-kiln grate-cooler liquid oxygen and liquid nitrogen add structural representation;
Fig. 2 is that the another kind of liquid oxygen of the utility model cement-kiln grate-cooler and liquid nitrogen add structural representation;
Fig. 3 is the utility model control circuit logic schematic diagram.
The specific embodiment
A kind of cement kiln utilizes the device of liquid oxygen and the cooling grog of liquid nitrogen, as depicted in figs. 1 and 2, comprise cement-kiln grate-cooler 1, the high temperature chamotte 2 of cement kiln falls into cement-kiln grate-cooler from rotary furnace 3 out, described cement-kiln grate-cooler is sequentially set with high temperature cooling area 1-1, middle temperature drop warm area 1-2 and low temperature cooling area 1-3, described high temperature chamotte is through high temperature cooling area, behind middle temperature drop warm area and low temperature cooling area, proceed to next process section, in described grate-cooler high temperature cooling area and middle temperature drop warm area, be respectively arranged with air-cooled air blast 4 and 5, on the output channel 4-1 of the air-cooled air blast in described high temperature cooling area, be provided with liquid oxygen input interface 6, on the output channel 5-1 of the air-cooled air blast of described middle temperature drop warm area, be provided with liquid nitrogen input interface 7, or as shown in Figure 2, on the input channel 4-2 of the air-cooled air blast in described high temperature cooling area, be provided with liquid oxygen input interface, on the input channel 5-2 of the air-cooled air blast of described middle temperature drop warm area, be provided with liquid nitrogen input interface, a liquid oxygen source 8 is connected with liquid oxygen input interface by liquid oxygen tube connector 9, a liquid nitrogen source 10 is connected with liquid nitrogen input interface by liquid nitrogen connecting tube 11, a control circuit is controlled liquid oxygen and the ratio of sending into of air and the ratio of sending into of liquid nitrogen and air according to the temperature of high temperature cooling area and middle temperature drop warm area.
In embodiment: as shown in Figure 3, described control circuit comprises industrial control unit (ICU) 12, air velocity transducer 13, flow control electromagnetic valve 14, variable frequency power controller 15, temperature sensor 16;
When liquid oxygen input interface and liquid nitrogen input interface are separately positioned on air blast output channel, at the air-cooled air blast output channel in described high temperature cooling area from air blast delivery outlet to the air-cooled air blast delivery outlet of temperature drop warm area liquid oxygen input interface and described to the described air velocity transducer 13 that is provided for respectively measuring air quantity liquid nitrogen input interface;
When liquid oxygen input interface and liquid nitrogen input interface are separately positioned on air blast input channel, described high temperature cooling area air-cooled air blast input channel air inlet 4-2-1 between liquid oxygen input interface and the air-cooled air blast input channel of described middle temperature drop warm area air inlet 5-2-1 to the described air velocity transducer 13 that is provided for respectively measuring air quantity between liquid nitrogen input interface;
On described liquid oxygen tube connector and liquid nitrogen connecting tube, be respectively arranged with described flow control electromagnetic valve 14, what the motor of described air-cooled air blast connected is described variable frequency power controller, the high temperature cooling area of described grate-cooler and middle temperature drop warm area are respectively arranged with described temperature sensor, described air velocity transducer, temperature sensor are connected to the signal input circuit of industrial control unit (ICU), and the control output circuit of described industrial control unit (ICU) connects respectively variable frequency power controller, flow control electromagnetic valve; Industrial control unit (ICU) is wherein PLC Programmable Logic Controller ripe on market.
In the above embodiments, from high-temperature region entrance to outlet, the temperature of (be grog entrance grog send mouthful) is that the temperature of different common high-temperature region entrance is the highest in described high-temperature region, and temperature sensor is also arranged on high-temperature region entrance or entrance between exporting.Equally, described middle warm area therefrom warm area entrance to the temperature of outlet (be grog entrance grog send mouthful) be different conventionally in the temperature of warm area entrance the highest, temperature sensor is also arranged on middle warm area entrance or entrance between exporting.
By the air compartment of grate-cooler below enter cold air in grate-cooler with grate on high temperature chamotte be heated to form high-temperature hot-air after carrying out sufficient heat exchange and draw and form Secondary Air and tertiary air from the upper end of grate-cooler, sent into respectively rotary kiln (Secondary Air) and dore furnace (tertiary air) is combustion-supporting.Therefore, in the above embodiments, described high temperature cooling area is the grate region that Secondary Air and high temperature cooling area tertiary air and grog carry out the grate-cooler of heat exchange, temperature sensor is arranged on high temperature section and the middle-temperature section of grate-cooler, high temperature cooling area refer in grate-cooler with grog heat exchange after gas temperature higher than the region of 700 ℃, middle temperature drop warm area refer in grate-cooler with grog heat exchange after gas temperature in the region of 700 ℃-300 ℃.
Liquid oxygen refers to industrial liquid oxygen.The method of industrial manufacture liquid oxygen is that liquid towards air carries out fractionation, its Main physical character is as follows: common air pressure (101.325 kPa) lower density 1.141 g/cm, freezing point 50.5 K(-222.65 ° C), boiling point 90.188 K(-182.96 ° C).
In embodiment, in high-temperature region, add liquid oxygen to accelerate the heat exchange of grog, make high temperature chamotte quenching, prevent or reduce C
3s, the decomposition of 1250 ℃, adds liquid nitrogen to prevent or has reduced MgO crystal and separated out at middle warm area, improves grog stability; Prevent C
3the crystal of S is grown up, and improves the grindability of grog.
Passing into of liquid oxygen reduces the ignition temperature of fuel and reduces the tail-off time, accelerates burning velocity, promotes burning completely; Make flame there is higher flame temperature and blackness reduces excess air coefficient simultaneously simultaneously, reduce the exhaust gas volumn after burning.
In cement production process, liquid oxygen enters grate-cooler with air, and liquid runs into high temperature chamotte, and liquid becomes gas, and this is an endothermic reaction, has therefore accelerated caloric value and has changed;
It is primary raw material that clinker be take lime stone and clay, ferriferous raw material, by proper proportion, is mixed with raw material, burn to partly or entirely melting, and through semi-finished product cooling and that obtain.Grog, after rotary kiln burns till, be sent into grate-cooler and carry out extremely cold.
From kiln head cover, fall into the high temperature chamotte of grate-cooler 1350 ℃ of left and right.When high temperature chamotte falls into grate-cooler from kiln head cover, grate-cooler below cold high pressure blower fan blasts strong cold wind grate-cooler lower air chamber and sees through grog layer, now in grate grog substantially in suspended state, high temperature chamotte and cold air complete sufficient heat exchange within a short period of time, cold wind makes high temperature chamotte cooling rapidly, multi mineral composition in grog crystallizes into metastable crystalline phase and reaches rapidly stable state, and the cold air that cold high pressure blower fan blasts is heated rapidly.Thin grog particle is flowed into the aggregate bin of grate below by the pore of grate, the grog of larger particles keeps certain thickness to discharge end, to move with certain speed with grate plate, through the cold wind of middle warm area and low-temperature space continue cooling after, the conveying equipment that falls into grate-cooler after the fragmentation of grate-cooler disintegrating machine enters clinker warehouse, in technique, requiring the clinker temperature that goes out grate-cooler is now ℃ left and right, ambient temperature+65, by the air compartment of grate-cooler below enter cold air in grate-cooler with grate on high temperature chamotte carry out being heated to form high-temperature hot-air after sufficient heat exchange, enter respectively rotary kiln (Secondary Air) and dore furnace (tertiary air) is combustion-supporting.After Pure Low Temperature Waste Heat Power Generation Plant in Cement system puts into operation, will be from grate-cooler Extraction parts hot blast, kiln hood AQC stove utilizes these used heat to carry out cogeneration or heating etc., returns, receives the object of energy-saving and emission-reduction to reach heat.
Grate-cooler is the key equipment in cement produced with the dry method production process, in not only bearing grate-cooler in the middle of whole cement production process, high temperature chamotte carries out cooling effect, but also be improved out grate-cooler clinker quality, improve grog and at cement, prepare the grindability of link, improve Secondary Air, tertiary air temperature, the effect such as combustion-supporting to rotary system.The equipment such as the grate-cooler of clinker cooling system and the five-stage cyclone preheater of firing system, dore furnace, rotary kiln combine mutually, jointly formed cement production process cooling with firing system system.The function of grate-cooler can be from following two aspect introductions:
(1), from cement industry aspect, grate-cooler is mainly responsible for also crying quenching to falling into the high temperature chamotte fast cooling of grate-cooler.High temperature chamotte falls into grate-cooler from kiln head cover, the high pressure cooling blower of grate-cooler below presses cold air as in the air compartment of grate-cooler, then cold wind penetrates rapidly the grog layer in grate from combing, make the high temperature chamotte cooling recovery that simultaneously realizes heat rapidly, in this process there is the physical-chemical reaction of series of complex in high temperature chamotte in grate-cooler.In this process, the grindability of the crystal of good cooling results also can be fine.
(2) from thermal technology's angle, grog is realized the cold wind and the high temperature chamotte in grate that in quenching, by high pressure cooling blower under combing, are blasted and is realized quick-cooling, heating heat convection in grate-cooler, thereby realizes the recovery to the entrained heat of high temperature chamotte.The hot blast that recovery obtains is combustion-supporting as Secondary Air and tertiary air except a part, and some enters the kiln hood AQC stove generating of Pure Low Temperature Waste Heat Power Generation Plant in Cement system after kiln hood dust-precipitator.Therefore, if reclaim the hot blast obtaining, remain on a higher temperature, this,, to reducing the hear rate of rotary kiln and dore furnace link, is all favourable to the generated energy of afterheat generating system so always.On the contrary, if the heat recovery efficiency of grate-cooler is lower, this not only has impact to the cooling quality of grog so, to the coal consumption of firing system with to the generated energy of afterheat generating system, all has adverse effect, and then energy-saving and cost-reducing unfavorable to enterprise.
(3) grate-cooler is born the cooling of high temperature chamotte and conveying task, and he is convenient to the transportation of high temperature chamotte and storage the cooling of high temperature chamotte.If cooling without grate-cooler, carry high temperature chamotte must adopt resistant to elevated temperatures equipment, this can improve production cost and also very serious to the damage of equipment.
Claims (2)
1. a cement kiln utilizes the device of liquid oxygen and the cooling grog of liquid nitrogen, comprise cement-kiln grate-cooler, the high temperature chamotte of cement kiln falls into cement-kiln grate-cooler from rotary kiln out, described cement-kiln grate-cooler is sequentially set with high temperature cooling area, middle temperature drop warm area, low temperature cooling area, described high temperature chamotte is through high temperature cooling area, behind middle temperature drop warm area and low temperature cooling area, proceed to next process section, in described grate-cooler high temperature cooling area and middle temperature drop warm area, be respectively arranged with air-cooled air blast, it is characterized in that, on the output of the air-cooled air blast in described high temperature cooling area or input channel, be provided with liquid oxygen input interface, on the output of the air-cooled air blast of described middle temperature drop warm area or input channel, be provided with liquid nitrogen input interface, a liquid oxygen source is connected with liquid oxygen input interface by liquid oxygen tube connector, a liquid nitrogen source is connected with liquid nitrogen input interface by liquid nitrogen connecting tube, a control circuit is controlled liquid oxygen and the ratio of sending into of air and the ratio of sending into of liquid nitrogen and air according to the temperature of high temperature cooling area and middle temperature drop warm area.
2. a kind of cement kiln according to claim 1 utilizes the device of liquid oxygen and the cooling grog of liquid nitrogen, it is characterized in that, described control circuit comprises industrial control unit (ICU), air velocity transducer, flow control electromagnetic valve, variable frequency power controller, temperature sensor;
When liquid oxygen input interface and liquid nitrogen input interface are separately positioned on air blast output channel, at the air-cooled air blast output channel in described high temperature cooling area from air blast delivery outlet to the air-cooled air blast delivery outlet of temperature drop warm area liquid oxygen input interface and described to the described air velocity transducer that is provided for respectively measuring air quantity liquid nitrogen input interface;
When liquid oxygen input interface and liquid nitrogen input interface are separately positioned on air blast input channel, described high temperature cooling area air-cooled air blast input channel air inlet between liquid oxygen input interface and the air-cooled air blast input channel of described middle temperature drop warm area air inlet to the described air velocity transducer that is provided for respectively measuring air quantity between liquid nitrogen input interface;
On described liquid oxygen tube connector and liquid nitrogen connecting tube, be respectively arranged with described flow control electromagnetic valve, what the motor of described air-cooled air blast connected is described variable frequency power controller, the high temperature cooling area of described grate-cooler and middle temperature drop warm area are respectively arranged with described temperature sensor, described air velocity transducer, temperature sensor are connected to the signal input circuit of industrial control unit (ICU), and the control output circuit of described industrial control unit (ICU) connects respectively variable frequency power controller, flow control electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420289230.XU CN203857822U (en) | 2014-05-30 | 2014-05-30 | Device for cooling clinker through liquid oxygen and liquid nitrogen and for cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420289230.XU CN203857822U (en) | 2014-05-30 | 2014-05-30 | Device for cooling clinker through liquid oxygen and liquid nitrogen and for cement kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203857822U true CN203857822U (en) | 2014-10-01 |
Family
ID=51607669
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420289230.XU Expired - Lifetime CN203857822U (en) | 2014-05-30 | 2014-05-30 | Device for cooling clinker through liquid oxygen and liquid nitrogen and for cement kiln |
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| Country | Link |
|---|---|
| CN (1) | CN203857822U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968671A (en) * | 2014-05-30 | 2014-08-06 | 北京建筑材料科学研究总院有限公司 | Device and method for cooling clinker by liquid oxygen and liquid nitrogen of cement kiln |
| CN116854383A (en) * | 2023-06-29 | 2023-10-10 | 唐金泉 | Novel low-energy-consumption process system for producing light-burned MgO powder |
| CN117109317A (en) * | 2023-09-12 | 2023-11-24 | 中材建设有限公司 | Air and total oxygen double-mode grate cooler |
-
2014
- 2014-05-30 CN CN201420289230.XU patent/CN203857822U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968671A (en) * | 2014-05-30 | 2014-08-06 | 北京建筑材料科学研究总院有限公司 | Device and method for cooling clinker by liquid oxygen and liquid nitrogen of cement kiln |
| CN116854383A (en) * | 2023-06-29 | 2023-10-10 | 唐金泉 | Novel low-energy-consumption process system for producing light-burned MgO powder |
| CN116854383B (en) * | 2023-06-29 | 2024-04-19 | 唐滨江 | Novel low-energy-consumption process system for producing light-burned MgO powder |
| CN117109317A (en) * | 2023-09-12 | 2023-11-24 | 中材建设有限公司 | Air and total oxygen double-mode grate cooler |
| CN117109317B (en) * | 2023-09-12 | 2024-01-26 | 中材建设有限公司 | Air and total oxygen double-mode grate cooler |
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