CN103968671A - Device and method for cooling clinker by liquid oxygen and liquid nitrogen of cement kiln - Google Patents
Device and method for cooling clinker by liquid oxygen and liquid nitrogen of cement kiln Download PDFInfo
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- CN103968671A CN103968671A CN201410240969.6A CN201410240969A CN103968671A CN 103968671 A CN103968671 A CN 103968671A CN 201410240969 A CN201410240969 A CN 201410240969A CN 103968671 A CN103968671 A CN 103968671A
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- 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
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Abstract
The invention discloses a device and a method for cooling clinker by liquid oxygen and liquid nitrogen of a cement kiln. The device is characterized in that a high-temperature cooling region of a grate cooler of the cement kiln is provided with a liquid oxygen input connector, and a middle-temperature cooling region of the grate cooler is provided with a liquid nitrogen input connector. The method comprises the steps of adding liquid oxygen the volume of which is 1%-12% of the total volume of cooling air fed by an air blower of a high temperature section of the grate cooler of the cement kiln, and adding liquid nitrogen the volume of which is 1%-45% of the total volume of cooling air fed by an air blower of a middle temperature section of the grate cooler of the cement kiln. The device and the method provided by the invention have the advantages that the cooling rate of clinker is improved by inputting liquid oxygen, and high-temperature clinker is cooled suddenly, so that the decomposition of D3S at 1250 DEG C is prevented or alleviated, the crystallization of MgO is prevented or alleviated, and the stability of the clinker is improved; a C3S crystal is prevented from growing, and thus the grindability of clinker is improved; the C2S crystal transfer is effectively prevented or alleviated by introduced liquid nitrogen.
Description
Technical field
The present invention relates to cement kiln oxygen-enriched combusting field, being particularly related to the device and method that a kind of cement kiln utilizes liquid oxygen and the cooling grog of liquid nitrogen, is a kind of device and method 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, all has application in glass industry, metallurgical industry and Thermal Power Engineering Field.Conventionally in air, only have 20.9% oxygen, fuel because anoxic can reduce caloric value, causes energy waste in the time of air burning: coal (comprising oil product, natural gas) obtains best efficiency of combustion in the time of 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, separates and obtains the oxygen rich gas of two kinds of different purity, then send into respectively the different portions of the multicenter combustor of cement rotary kiln in air
Position, carries out oxygen-enriched combustion-supporting.This invention is without improving existing burner, having strengthened the modulability of oxygen-enriched combusting.But improving and improving under the prerequisite of combustibility, cement kiln also will solve another problem, prevents exactly the excessive decomposition of tricalcium silicate in the time that temperature exceedes 1250 DEG C and prevents or reduced MgO crystal and separated out, and improves 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
2when S grog product, more need by cooling rapidly mode, make grog fast by crystal formation inversion temperature interval, 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 what current cooling section adopted is, and 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 object of this invention is to provide the device and method that a kind of cement kiln utilizes liquid oxygen and the cooling grog of liquid nitrogen.It is a kind of device and method 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, technical scheme of the present invention 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, be respectively arranged with air-cooled air blast in described grate-cooler high temperature cooling area and middle temperature drop warm area, 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 according to the ratio of sending into of the ratio of sending into of the temperature control liquid oxygen of high temperature cooling area and middle temperature drop warm area and air and liquid nitrogen and air.
Scheme is further: described control circuit comprises industrial control unit (ICU), air velocity transducer, flow control electromagnetic valve, variable frequency power controller, temperature sensor;
In the time that 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;
In the time that 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, the signal input circuit that temperature sensor is connected to industrial control unit (ICU), the control output circuit of described industrial control unit (ICU) connects respectively variable frequency power controller, flow control electromagnetic valve.
A kind of cement kiln utilizes the method for liquid oxygen and the cooling grog of liquid nitrogen, it is the method for utilizing liquid oxygen and the cooling grog of liquid nitrogen of described device, it is characterized in that, described method is the liquid oxygen that contains total blast volume 1% to 12% in the cooling-air of sending at the air blast of cement-kiln grate-cooler high temperature section, contains the liquid nitrogen of total blast volume 1% to 45% at the air blast of cement-kiln grate-cooler middle-temperature section in the cooling-air of sending into.
Scheme is further: described method further comprises:
A, after cement kiln works well, open liquid oxygen transfer passage, in grate-cooler high temperature section centre position, when gas temperature is during higher than 1150 DEG C, increase the cooling air delivery that air blast is sent into, in cold air flow, contain the liquid oxygen of total blast volume 1% to 12%, when gas temperature is lower than 1050 DEG C, reduce the cooling air delivery that air blast is sent into, or close liquid oxygen transfer passage;
B, after cement kiln works well, open liquid nitrogen transfer passage, in grate-cooler middle-temperature section centre position, when gas temperature is during higher than 550 DEG C, increase the cold air flow that air blast is sent into, in cold air flow, contain 1% to 45% liquid nitrogen of total blast volume, promote rapidly cooling, when gas temperature is during lower than 400 DEG C, reduce the cooling air delivery that air blast is sent into.
Scheme is further: in described grate-cooler high temperature section cooling air delivery, include the liquid oxygen of total blast volume 1%, include the liquid nitrogen of total blast volume 1% in described grate-cooler middle-temperature section cooling air delivery.
Scheme is further: in described grate-cooler high temperature section cooling air delivery, include the liquid oxygen of total blast volume 12%, include the liquid nitrogen of total blast volume 45% in described grate-cooler middle-temperature section cooling air delivery.
The present invention compared with prior art tool has the following advantages:
The advantage that liquid oxygen passes into:
1, accelerate the heat exchange of grog, make high temperature chamotte quenching, prevent or reduce C3S the decomposition of 1250 DEG C, 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 DEG C 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 present invention is described in detail.
Brief description of the drawings
Fig. 1 is that cement-kiln grate-cooler liquid oxygen of the present invention and liquid nitrogen add structural representation;
Fig. 2 is that the another kind of liquid oxygen of cement-kiln grate-cooler of the present invention and liquid nitrogen add structural representation;
Fig. 3 is control circuit logic schematic diagram of the present invention.
Detailed description of the invention
Embodiment 1:
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, be respectively arranged with air-cooled air blast 4 and 5 in described grate-cooler high temperature cooling area and middle temperature drop warm area, 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 according to the ratio of sending into of the ratio of sending into of the temperature control liquid oxygen of high temperature cooling area and middle temperature drop warm area and air and liquid nitrogen and air.
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;
In the time that 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;
In the time that 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, the signal input circuit that temperature sensor is connected to industrial control unit (ICU), 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 DEG C, middle temperature drop warm area refer in grate-cooler with grog heat exchange after gas temperature in the region of 700 DEG C-300 DEG C.
Embodiment 2:
A kind of cement kiln utilizes the method for liquid oxygen and the cooling grog of liquid nitrogen, it is the method for utilizing liquid oxygen and the cooling grog of liquid nitrogen based on device described in embodiment 1, described method is the liquid oxygen that contains total blast volume 1% to 12% in the cooling-air of sending at the air blast of cement-kiln grate-cooler high temperature section, contains the liquid nitrogen of total blast volume 1% to 45% at the air blast of cement-kiln grate-cooler middle-temperature section in the cooling-air of sending into.
In embodiment, described method further comprises:
A, after cement kiln works well, open liquid oxygen transfer passage, in grate-cooler high temperature section centre position, when gas temperature is during higher than 1150 DEG C, increase the cooling air delivery that air blast is sent into, in cold air flow, contain the liquid oxygen of total blast volume 1% to 12%, regulate the content of liquid oxygen to make its effect that produces rapid drawdown temperature, i.e. temperature decrease within 10 seconds weeks; When gas temperature is lower than 1050 DEG C, reduce the cooling air delivery that air blast is sent into, or close liquid oxygen transfer passage;
B, after cement kiln works well, open liquid nitrogen transfer passage, in grate-cooler middle-temperature section centre position, when gas temperature is during higher than 550 DEG C, increase the cold air flow that air blast is sent into, in cold air flow, contain 1% to 45% liquid nitrogen of total blast volume, regulate the liquid nitrogen in cold air flow, make it within 10 seconds, be cooled to rapidly 450 DEG C, when gas temperature is during lower than 400 DEG C, reduce the cooling air delivery that air blast is sent into.
Centre position wherein refers to the position between this section of both sides, and location point is definite according to on-the-spot practical operation situation, can be described as a dynamic ad-hoc location.
Described increase, the cooling air delivery that minimizing air blast is sent into and guarantee liquid oxygen, the percentage of liquid nitrogen in cooling air delivery are: industrial control unit (ICU) is controlled output circuit control connection variable frequency power controller and flow control electromagnetic valve respectively according to control instruction by it.
In embodiment, a preferred plan is: in described grate-cooler high temperature section cooling air delivery, include the liquid oxygen of total blast volume 1%, include the liquid nitrogen of total blast volume 1% in described grate-cooler middle-temperature section cooling air delivery.
In embodiment, another preferred plan is: in described grate-cooler high temperature section cooling air delivery, include the liquid oxygen of total blast volume 12%, include the liquid nitrogen of total blast volume 45% in described grate-cooler middle-temperature section cooling air delivery.
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: air pressure (101.325 kPa) lower density 1.141 g/cm conventionally, freezing point 50.5 K(-222.65 ° C), boiling point 90.188 K(-182.96 ° C).
In embodiment, add liquid oxygen to accelerate the heat exchange of grog in high-temperature region, make high temperature chamotte quenching, prevent or reduce C
3s, the decomposition of 1250 DEG C, 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;
Clinker, taking lime stone and clay, ferriferous raw material as primary raw material, is mixed with raw material by proper proportion, burns 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.
Fall into the high temperature chamotte of grate-cooler from kiln head cover 1350 DEG C 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 move to discharge end 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 DEG C 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., to reach the object of heat recovery energy-saving and emission-reduction.
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 prepare the grindability of link at cement, 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 the high temperature chamotte fast cooling that falls into grate-cooler also to cry quenching.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, the high temperature chamotte that grog is realized in cold wind and the grate being blasted by high pressure cooling blower under combing in quenching in grate-cooler is realized quick-cooling, heating heat convection, 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, remain on a higher temperature if reclaim the hot blast obtaining, 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, the coal consumption to firing system and the generated energy of afterheat generating system is all had to 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, his cooling transport and storage being convenient to high temperature chamotte to 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 (6)
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, be respectively arranged with air-cooled air blast in described grate-cooler high temperature cooling area and middle temperature drop warm area, 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 according to the ratio of sending into of the ratio of sending into of the temperature control liquid oxygen of high temperature cooling area and middle temperature drop warm area and air and liquid nitrogen and air.
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;
In the time that 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;
In the time that 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, the signal input circuit that temperature sensor is connected to industrial control unit (ICU), the control output circuit of described industrial control unit (ICU) connects respectively variable frequency power controller, flow control electromagnetic valve.
3. a cement kiln utilizes the method for liquid oxygen and the cooling grog of liquid nitrogen, it is the method for utilizing liquid oxygen and the cooling grog of liquid nitrogen based on device described in claim 1, it is characterized in that, described method is the liquid oxygen that contains total blast volume 1% to 12% in the cooling-air of sending at the air blast of cement-kiln grate-cooler high temperature section, contains the liquid nitrogen of total blast volume 1% to 45% at the air blast of cement-kiln grate-cooler middle-temperature section in the cooling-air of sending into.
4. a kind of cement kiln according to claim 3 utilizes the method for liquid oxygen and the cooling grog of liquid nitrogen, it is characterized in that, described method further comprises:
A, after cement kiln works well, open liquid oxygen transfer passage, in grate-cooler high temperature section centre position, when gas temperature is during higher than 1150 DEG C, increase the cooling air delivery that air blast is sent into, in cold air flow, contain the liquid oxygen of total blast volume 1% to 12%, when gas temperature is lower than 1050 DEG C, reduce the cooling air delivery that air blast is sent into, or close liquid oxygen transfer passage;
B, after cement kiln works well, opens liquid nitrogen transfer passage, in grate-cooler middle-temperature section centre position, when gas temperature is during higher than 550 DEG C, increase the cold air flow that air blast is sent into, in cold air flow, contain 1% to 45% liquid nitrogen of total blast volume, promote cooling rapidly; When gas temperature lower than 400 DEG C constantly, reduce the cooling air delivery sent into of air blast.
5. utilize the method for liquid oxygen and the cooling grog of liquid nitrogen according to a kind of cement kiln described in claim 3 or 4, it is characterized in that, in described grate-cooler high temperature section cooling air delivery, include the liquid oxygen of total blast volume 1%, in described grate-cooler middle-temperature section cooling air delivery, include the liquid nitrogen of total blast volume 1%.
6. utilize the method for liquid oxygen and the cooling grog of liquid nitrogen according to a kind of cement kiln described in claim 3 or 4, it is characterized in that, in described grate-cooler high temperature section cooling air delivery, include the liquid oxygen of total blast volume 12%, in described grate-cooler middle-temperature section cooling air delivery, include the liquid nitrogen of total blast volume 45%.
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| RU2587043C2 (en) * | 2014-10-21 | 2016-06-10 | Федеральное государственное казенное военное образовательное учереждение высшего профессионального образования "ВОЕННАЯ АКАДЕМИЯ МАТЕРИАЛЬНО-ТЕХНИЧЕСКОГО ОБЕСПЕЧЕНИЯ имени генерала армии А.В. Хрулева" | Plant to produce high-quality cement |
| RU2586926C2 (en) * | 2014-10-21 | 2016-06-10 | Федеральное государственное казенное военное образовательное учреждение высшего профессионального образования "ВОЕННАЯ АКАДЕМИЯ МАТЕРИАЛЬНО-ТЕХНИЧЕСКОГО ОБЕСПЕЧЕНИЯ имени генерала армии А.В. Хрулева" | Plant to produce high-grade and quick-setting cements based on cryomilling |
| CN109206031A (en) * | 2018-10-31 | 2019-01-15 | 江西银杉白水泥有限公司 | A kind of efficient bleaching process of white cement clinker |
| CN109488629A (en) * | 2018-11-12 | 2019-03-19 | 南京瑞泰水泥制造设备有限公司 | A kind of automatic flow regulating valve for grate cooler |
| CN110170239A (en) * | 2019-07-05 | 2019-08-27 | 山东泰溥建材科技有限公司 | A kind of system and method for realizing green denitration using dry technology for production |
| CN113307517A (en) * | 2021-06-18 | 2021-08-27 | 登电集团水泥有限公司 | Quick-setting curing material and preparation method thereof |
| CN113606956A (en) * | 2021-08-18 | 2021-11-05 | 云南云铜锌业股份有限公司 | Waste heat recovery system for volatile kiln tail slag |
| CN116854383A (en) * | 2023-06-29 | 2023-10-10 | 唐金泉 | Novel low-energy-consumption process system for producing light-burned MgO powder |
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| RU2587043C2 (en) * | 2014-10-21 | 2016-06-10 | Федеральное государственное казенное военное образовательное учереждение высшего профессионального образования "ВОЕННАЯ АКАДЕМИЯ МАТЕРИАЛЬНО-ТЕХНИЧЕСКОГО ОБЕСПЕЧЕНИЯ имени генерала армии А.В. Хрулева" | Plant to produce high-quality cement |
| RU2586926C2 (en) * | 2014-10-21 | 2016-06-10 | Федеральное государственное казенное военное образовательное учреждение высшего профессионального образования "ВОЕННАЯ АКАДЕМИЯ МАТЕРИАЛЬНО-ТЕХНИЧЕСКОГО ОБЕСПЕЧЕНИЯ имени генерала армии А.В. Хрулева" | Plant to produce high-grade and quick-setting cements based on cryomilling |
| CN104478247A (en) * | 2014-11-17 | 2015-04-01 | 济南大学 | Cooling way for belite-barium calcium sulfoaluminate cement clinker |
| CN109206031A (en) * | 2018-10-31 | 2019-01-15 | 江西银杉白水泥有限公司 | A kind of efficient bleaching process of white cement clinker |
| CN109488629A (en) * | 2018-11-12 | 2019-03-19 | 南京瑞泰水泥制造设备有限公司 | A kind of automatic flow regulating valve for grate cooler |
| CN109488629B (en) * | 2018-11-12 | 2020-02-04 | 南京瑞泰水泥制造设备有限公司 | Automatic flow regulating valve of grate cooler |
| CN110170239A (en) * | 2019-07-05 | 2019-08-27 | 山东泰溥建材科技有限公司 | A kind of system and method for realizing green denitration using dry technology for production |
| CN113307517A (en) * | 2021-06-18 | 2021-08-27 | 登电集团水泥有限公司 | Quick-setting curing material and preparation method thereof |
| CN113606956A (en) * | 2021-08-18 | 2021-11-05 | 云南云铜锌业股份有限公司 | Waste heat recovery system for volatile kiln tail slag |
| 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 |
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