CN115183593B

CN115183593B - Cement kiln total oxygen combustion multi-medium partition air supply grate cooler system capable of realizing energy conservation and consumption reduction

Info

Publication number: CN115183593B
Application number: CN202210796374.3A
Authority: CN
Inventors: 吴永哲; 刘旭; 尤小平; 邓荣娟; 许龙旭; 孙志鹏; 陈昌华; 赵亮; 丛晓静; 杨爱龙
Original assignee: Tianjin Cement Industry Design and Research Institute Co Ltd
Current assignee: Tianjin Cement Industry Design and Research Institute Co Ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2024-06-07
Anticipated expiration: 2042-07-06
Also published as: CN115183593A

Abstract

The invention discloses a cement kiln total oxygen combustion multi-medium partition air supply grate cooler system capable of realizing energy conservation and consumption reduction, wherein the widths of a first-stage grate bed and a second-stage grate bed are equal, the length ratio is 4:7-8, and the cooling area ratio is 4:7-8; the gas consumption of the first cooling partition of the first-stage grate bed is less than or equal to 0.4m ³/kg/cl, and the gas consumption of the second cooling partition of the first-stage grate bed is less than or equal to 0.4Nm ³/kg/cl; the cooling air volume ratio of the cooling area of the first-stage grate bed to the cooling area of the second-stage grate bed is less than or equal to 0.8:1.2; the roller crusher is an ultra-high temperature roller crusher and comprises a cooling system, wherein the cooling system comprises a roller shaft water cooling system for providing water cooling protection for a roller shaft of a roller shaft assembly and a shell air cooling system for providing cooling protection for a shell assembly; the invention reduces the area and the air consumption of the first cooling zone, and ensures that all the oxygen and the carbon dioxide used in the first cooling zone enter the rotary kiln and the decomposing furnace to realize 100 percent utilization.

Description

Cement kiln total oxygen combustion multi-medium partition air supply grate cooler system capable of realizing energy conservation and consumption reduction

Technical Field

The invention relates to the technical field of total-oxygen combustion carbon-enriched cement production equipment, in particular to a cement kiln total-oxygen combustion multi-medium partition air supply grate cooler system capable of realizing energy conservation and consumption reduction.

Background

The grate cooler for cement industry is an important equipment of a cement clinker firing system, and plays roles of clinker cooling, heat recovery, clinker conveying, clinker crushing and the like in the cement clinker production process. The system transmits heat exchanged high-temperature secondary air and tertiary air to the rotary kiln and the preheater decomposing furnace, and transmits redundant high-temperature waste gas to a waste heat power generation system for recovery power generation. In the grate cooler, a high-temperature roller crusher is arranged, so that large-sized clinker with larger grain size can be crushed into small-sized clinker, heat exchange can be better carried out, the cooling efficiency of the grate cooler is improved, and the temperature of the clinker and the air consumption for cooling the clinker when the grate cooler is discharged are reduced.

At present, the requirements on carbon emission reduction in the cement industry are urgent, and each related scientific research institution is always exploring a technical path of carbon emission reduction, wherein the technical research of an autonomous developed full-oxygen combustion carbon enrichment (for carbon complement) cement firing system is breakthrough developed, and the method provides a broad prospect for energy conservation and carbon reduction in the cement industry. One of the key points of the sintering technology is the adaptability of the kiln head grate cooler. The carbon dioxide enrichment technology realizes the self-enrichment of carbon dioxide on one hand, greatly facilitates the trapping and purifying operation of carbon dioxide, and realizes the cooling and heat recovery of clinker on the other hand.

The complete oxygen combustion system requires the grate cooler to meet the requirements of clinker cooling and simultaneously has the characteristics of precise multi-medium air supply, independent partition cooling, independent sectional cooling, good air tightness and the like.

Chinese patent publication No. CN113267053a discloses a system and method for producing cement clinker by total oxygen combustion cycle preheating, wherein the working principle of the grate cooler in the total oxygen combustion system is as follows: through high temperature roller crusher and upper and lower partition wall, divide into first cooling zone and second cooling zone with the grate cooler, first cooling zone includes first cooling zone and second cooling zone, under the prerequisite that does not influence high temperature material cooling and transport function, realize that first cooling zone and second cooling zone mutually independent, mutually noninterfere provide the cooling gas of different composition, and first cooling zone and second cooling zone also let in the cooling gas of different composition, the mixed gas of O ₂/CO₂ in first cooling zone and the air in second cooling zone are easy cluster wind, can reduce the carbon dioxide concentration in the flue gas, thereby influence the entrapment of carbon dioxide, also can increase the consumption of oxygen, increase the cost. The clinker at 1400 ℃ enters a first cooling partition after coming out of the rotary kiln, mixed gas of O ₂/CO₂ is introduced into the first cooling partition to exchange heat with the clinker, and mixed high-temperature gas after heat exchange enters the rotary kiln and a decomposing furnace; the second cooling partition is filled with high-concentration carbon dioxide gas to exchange heat with clinker, the high-temperature high-concentration carbon dioxide waste gas after heat exchange enters a rotary kiln or a preheater system, and the clinker with different particle sizes is cooled and then cooled to a certain temperature; then the clinker is crushed by a high-temperature roller crusher, the granularity of the crushed clinker is unified within 25mm, and the clinker falls into a second cooling zone for further rapid cooling; and the second cooling area is filled with conventional air to exchange heat with clinker, the clinker is finally cooled to below 100 ℃, the heat exchanged air is subjected to waste heat utilization, and then the air is finally discharged into the atmosphere through dust purification treatment.

At present, the high-temperature roller crusher in the grate cooler which is applied at home and abroad has the forefront use position, the separation length ratio of the first grate bed and the second grate bed is about 6:5, and the air consumption ratio is about 1.5:0.5 (the standard condition air consumption required by unit clinker is 2.0Nm ³/kg.cl). However, the grate cooler still has the following problems when applied to an oxygen-enriched combustion system:

1. The length of the first section of grate bed is too long and the area is too large, so that the consumption of the mixed gas of O ₂/CO₂ in the cooling area is 1.5Nm ³/kg.cl, and the amount of air actually fed into the rotary kiln and the decomposing furnace is only about 0.8Nm ³/kg.cl, so that the fuel combustion of a sintering system can be supported, the consumption of oxygen is increased, and the cost is increased;

2. The existing clinker high-temperature roller crusher can only crush the clinker below 650 ℃, if the length of a cooling zone of a section of grate bed is required to be reduced, or the air quantity of the section of grate bed is reduced to below 0.8Nm ³/kg.cl, the temperature of the clinker entering the high-temperature roller crusher can reach above 850 ℃, and the existing clinker high-temperature roller crusher technology cannot meet the requirement.

Therefore, research on a multi-medium partition air supply grate cooler system which can realize energy conservation and consumption reduction and has an ultra-high temperature roller crusher used at 950-1000 ℃ is imperative.

Disclosure of Invention

The invention provides a multi-medium partition air supply grate cooler system capable of realizing energy saving and consumption reduction in cement kiln total oxygen combustion, which aims to solve the problems in the prior art, and a roller crusher capable of being used at 950-1000 ℃ is arranged at a position closer to a feed opening of a rotary kiln, so that the area and the air consumption of a first cooling area are reduced, and oxygen and carbon dioxide used in the first cooling area are fully fed into the rotary kiln and a decomposing furnace, so that 100% utilization is realized. The method solves the problems of large area of a first cooling area, large consumption of O ₂/CO₂ mixed gas and great production cost rise in the carbon dioxide enrichment technology of the existing cement kiln.

The invention is realized in such a way that the full-oxygen combustion multi-medium partition air supply grate cooler system of the cement kiln capable of realizing energy saving and consumption reduction comprises a grate cooler shell, a grate bed, a roller crusher, partition baffles, an air chamber partition plate and a high-temperature wind screen wall,

The grate bed is positioned in the grate cooler shell and is divided into two sections, namely a first section of grate bed close to the feed opening of the rotary kiln and a second section of grate bed close to the discharge opening of the grate cooler; the roller crusher is positioned between the first-stage grate bed and the second-stage grate bed, the roller crusher comprises a crushing unit, a shell component and a transmission device, the crushing unit is composed of at least two roller shaft components, two ends of each roller shaft component are rotatably arranged on the shell component through a transmission shaft head and a driven shaft head respectively, and the transmission shaft head end of each roller shaft component is connected with the transmission device for driving the roller shaft component to rotate; the partition baffle is positioned at the rear end of the roller crusher, divides the grate cooler into two independent cooling areas, namely a first cooling area where a section of grate bed is positioned and a second cooling area where a section of grate bed is positioned;

The first cooling zone is divided into a first cooling zone close to a blanking port of the rotary kiln and a second cooling zone close to the roller crusher, the first cooling zone and the second cooling zone are separated by an air chamber separation plate positioned below a section of grate bed and a high-temperature wind shielding wall hung on the top of the grate cooler shell, and the high-temperature wind shielding wall is positioned right above the air chamber separation plate;

Cooling medium inlets are respectively arranged on the side surfaces of the shell, which correspond to the first cooling partition, the second cooling partition and are positioned below the grate bed, and the cooling medium inlets of each region are connected with an air blower; the gas introduced into the first cooling zone is mixed gas of pure oxygen and high-concentration carbon dioxide, the gas introduced into the second cooling zone is high-concentration carbon dioxide flue gas, and the gas introduced into the second cooling zone is air;

The top of the first cooling partition is provided with a secondary air taking port and a tertiary air taking port, the top of the second cooling partition is provided with a high-temperature waste heat taking port, and the top of the second cooling partition is provided with a low-temperature waste heat taking port;

the widths of the first-section grate bed and the second-section grate bed are equal, the length ratio is 4:7-8, and the cooling area ratio is 4:7-8;

The gas consumption of the first cooling partition of the first-stage grate bed is less than or equal to 0.4m ³/kg/cl, and the gas consumption of the second cooling partition of the first-stage grate bed is less than or equal to 0.4Nm ³/kg/cl; the cooling air volume ratio of the cooling area of the first-stage grate bed to the cooling area of the second-stage grate bed is less than or equal to 0.8:1.2;

The roller crusher is an ultra-high temperature roller crusher, and further comprises a cooling system, wherein the cooling system comprises a roller shaft water cooling system for providing water cooling protection for a roller shaft of the roller shaft assembly and a shell air cooling system for providing cooling protection for the shell assembly; the roller shaft and the driven shaft head are hollow structures, and the roller shaft water cooling system is connected with the driven shaft head and stretches into the roller shaft to cool the roller shaft in a water inlet and return mode; the shell assembly is internally provided with a hollow structure which is communicated, an air inlet and an air outlet of the shell assembly are arranged diagonally, and the shell air cooling system is used for conveying cooling air into the shell assembly from the air inlet of the shell assembly to cool the shell assembly in two paths and discharging the cooling air from the air outlet.

Preferably, the height of the bottom of the high-temperature wind shielding wall from a section of grate bed is 2m, the height of the high-temperature wind shielding wall is 1.5m, the thickness of the high-temperature wind shielding wall is 400mm, the width of the high-temperature wind shielding wall is the same as that of the grate cooler shell, and the cross wind between the first cooling partition and the second cooling partition is reduced as much as possible.

Preferably, hydraulic power systems for providing power for the movement of the grate beds are arranged below the first-stage grate bed and the second-stage grate bed, each hydraulic power system comprises a hydraulic station, a hydraulic pipe and a hydraulic cylinder, the hydraulic station is positioned outside the grate cooler, the hydraulic cylinder is positioned below the grate bed, and the hydraulic pipe is connected with the hydraulic station and the hydraulic cylinder; the hydraulic cylinder and the hydraulic pipe are made of high-temperature resistant materials, and can resist the high temperature of 120 ℃; the hydraulic station is provided with an independent water cooling system, so that the temperature of hydraulic oil returned from the hydraulic cylinder can be reduced from 120 ℃ to below 50 ℃.

Preferably, the roll shaft water cooling system consists of an in-shaft water inlet pipeline, return water damping blades, an out-shaft water inlet pipeline and a sealing device, wherein the in-shaft water inlet pipeline is positioned in an inner space formed by a roll shaft and a driven shaft head, the return water damping blades are arranged between the outer wall of the in-shaft water inlet pipeline and the inner wall of the roll shaft, the return water damping blades are uniformly distributed, and a return water cavity is formed between the outer wall of the in-shaft water inlet pipeline and the inner wall of the roll shaft and between the outer wall of the driven shaft head; the outer water inlet and return pipeline of the shaft is divided into two layers, the inner layer is provided with a water inlet interface, the outer layer is provided with a water return interface, the inner layer of the outer water inlet and return pipeline of the shaft is communicated with the inner water inlet pipeline of the shaft, and the outer layer of the outer water inlet and return pipeline of the shaft is communicated with the water return cavity; the inner layer of the shaft outer water inlet and return pipeline and the inner water inlet pipeline, and the outer layer of the shaft outer water inlet and return pipeline and the driven shaft head are sealed by sealing devices.

Further preferably, the sealing device comprises a water inlet sealing ring and a water return sealing ring, wherein the water inlet sealing ring seals between the inner layer of the water inlet and return pipeline outside the shaft and the water inlet pipeline inside the shaft, and the water return sealing ring seals between the outer layer of the water inlet and return pipeline outside the shaft and the driven shaft head.

Still more preferably, the end face of the driven shaft head is of a stepped structure with steps, the water inlet sealing ring is sleeved on the inner layer of the water inlet and return pipeline outside the shaft and fixed on the water inlet pipeline inside the shaft, the periphery of the water inlet sealing ring extends to the steps of the driven shaft head, and a through hole is formed in the position, corresponding to the water return cavity, of the water inlet sealing ring; the water return sealing ring is of a '╡' structure with a protruding part, the water return sealing ring is sleeved on the outer layer of the water inlet and return pipeline outside the shaft and is fixed on the driven shaft head, and the protruding part is attached to the wall surface of the step of the driven shaft head.

Preferably, the shell air cooling system comprises an air inlet pipeline, an air outlet pipeline and a fan, wherein the air inlet pipeline is connected with an air inlet of the shell assembly, the air outlet pipeline is connected with an air outlet of the shell assembly, and the fan is positioned at an inlet of the air inlet pipeline.

Preferably, the shell assembly consists of a bottom frame, a front end wall, a rear end wall, a cross beam, a sealing box, a first surfacing wear-resistant plate and a second surfacing wear-resistant plate; the bottom frame is positioned at the left side and the right side of the shell assembly, the front end wall is positioned at the front end of the shell assembly, the two ends of the front end wall are fixedly connected with the bottom frame, the rear end wall is positioned at the rear end of the shell assembly, the two ends of the rear end wall are fixedly connected with the bottom frame, the cross beam and the sealing box are positioned at the left side and the right side of the shell assembly, the two ends of each cross beam are respectively fixed on the front end wall and the rear end wall, and each sealing box is positioned between the corresponding cross beam and the bottom frame; the inner wall upper ends of the front end wall and the rear end wall are respectively provided with the first surfacing wear-resistant plate, and the inner wall upper end of the cross beam is provided with the second surfacing wear-resistant plate.

Further preferably, the front end wall, the rear end wall, the cross beam and the sealing box are all made of steel plates by means of assembly welding, the inside of the front end wall, the rear end wall, the cross beam and the sealing box are of hollow structures, holes are reserved at the contact positions of the front end wall, the rear end wall, the cross beam and the sealing box in two pairs, a cavity which is connected in series is formed inside the shell assembly, an interface is respectively arranged on one side of the front end wall and one side of the rear end wall, the interface of the front end wall is an air inlet, and the interface of the rear end wall is an air outlet.

Preferably, the roller ring of the roller shaft assembly is made of a material which can have excellent heat resistance, wear resistance and thermal fatigue cycle resistance at the ultra-high temperature of 1000 ℃.

Preferably, each roller assembly comprises a roller, a positioning key, roller rings, top rings, a protective sleeve, a driving shaft head, a driven shaft head and a bearing seat, wherein the positioning key is fixed on the roller, the roller rings are provided with a plurality of roller rings, each roller ring is sleeved on the roller along the axial direction through the positioning key, the top rings are sleeved on the roller shafts positioned on two sides of each roller ring in a row, the protective sleeve is sleeved on the roller shafts positioned on the outer sides of each top ring, the end faces of two ends of the roller shafts are connected and fixed with the driving shaft head and the driven shaft head respectively, the bearing seats are mounted on the driving shaft head and the driven shaft head respectively, and each bearing seat is connected and fixed with the shell assembly.

Preferably, the transmission device consists of a motor, a speed reducer and a shaft coupling, wherein a motor shaft of the motor is connected with an input shaft of the speed reducer, and an output shaft of the speed reducer is connected with a transmission shaft head of the roll shaft assembly through the shaft coupling.

The invention has the advantages and positive effects that:

1. According to the grate cooler system provided by the invention, the cooling area ratio of the first-stage grate bed to the second-stage grate bed is 4:7-8 by the ultra-high temperature roller crusher. Wherein, the dosage of the mixed gas blown into the O ₂/CO₂ is about 0.4m ³/kg/cl in the first cooling partition of the first section of the grate bed; the second cooling zone of the first grate bed is filled with high-concentration carbon dioxide gas with the dosage of about 0.4Nm ³/kg. The lower air quantity for the first-stage grate bed ensures that all oxygen and carbon dioxide used in the first cooling zone enter the rotary kiln and the decomposing furnace to realize 100 percent utilization, thereby ensuring the oxygen for burning kiln fuel, simultaneously reducing the high-temperature high-concentration carbon dioxide waste gas quantity, reducing the heat consumption and the electricity consumption of the whole cement burning system and reducing the production cost. The length, the cooling area proportion and the air consumption of the first-stage grate bed and the second-stage grate bed can be well matched with the total oxygen combustion carbon enriched cement production process, so that the amount of waste gas entering the preheater system is effectively reduced, the equipment size of the preheater system can be reduced, and the construction investment of the whole preheater system is lower.

2. According to the grate cooler system provided by the invention, as the air consumption of the grate bed at one stage is only 0.8Nm ³/kg.cl, the clinker passing through the first cooling zone is short in cooling time, the temperature is reduced to about 850 ℃ at most, and the clinker needs to pass through the roller crusher and then enter the second cooling zone, so that higher requirements are provided for the high-temperature resistance of the roller crusher, and the ultrahigh-temperature roller crusher successfully solves the problem.

3. The ultra-high temperature roller crusher realizes durable, safe and reliable work at the working condition temperature of 950-1000 ℃, and the length ratio of the grate bed to the two sections of grate beds can be divided into 1:2 by using the ultra-high temperature roller crusher, which is far more than the forefront position (namely the position where the length ratio of the two sections of grate beds reaches 6:5) of the roller crusher at home and abroad in the grate cooler at present; the position of the ultra-high temperature roller crusher placed in the grate cooler is greatly moved forward, so that the advanced crushing of the large-sized high-temperature clinker is realized, and the heat exchange rate of the grate cooler is improved; secondly, the clinker is cooled in advance, and the cooling air quantity of the grate cooler is reduced in the subsequent cooling process, so that the air quantity is reduced; finally, the placement position of the invention in the grate cooler can realize the technical index that the length of one section of grate bed of the grate cooler accounts for less than 35 percent of the total length of the grate bed, thereby further realizing the achievement of meeting the new technological requirements of total oxygen combustion.

4. The roll shaft water cooling system of the ultra-high temperature roll crusher is simple and practical in structure, a large amount of rapid cooling water is led into the inner wall of the roll shaft in an extremely short time through the water inlet pipeline outside the roll shaft and the water inlet pipeline inside the roll shaft, the speed of the cooling water is controlled through the water return damping blades, the cooling water can sufficiently cool the roll shaft and then flow out, the working temperature of the roll shaft is ensured to be within 100 ℃, the roll shaft is made of a common low alloy steel material, expensive 0Cr25Ni20 stainless steel material is not needed, and the cost is saved.

5. The shell air cooling system of the ultra-high temperature roller crusher has ingenious and practical structure, utilizes the cavity structures of the front end wall, the rear end wall, the cross beams at the two sides and the sealing boxes at the two sides in the shell assembly, and holes are formed at the parts connected with each other to communicate the inner cavities together to form an inner air channel, and the shell air cooling system is used for taking away heat to effectively protect the shell assembly.

6. The roller ring in the roller shaft assembly of the ultra-high temperature roller crusher is used for directly crushing high-temperature granular materials, is made of materials which are independently innovatively developed and can have excellent heat resistance, wear resistance and thermal fatigue resistance circulation performance at the ultra-high temperature of 1000 ℃, and can completely adapt to the working condition temperature of 950-1000 ℃ under the protection of any cooling medium such as no water or air, so that the ultra-high temperature region of the roller crusher can be permanently, safely and reliably operated.

7. The ultra-high temperature roller crusher can adapt to grate coolers with various specifications and sizes, is flexible and changeable, needs two groups of roller shaft components at least for realizing the crushing function, and can be used for increasing the number of the groups of the roller shaft components according to the actual capacity on the basis; the number of the roller shaft assemblies is clearly specified, and if the productivity is required to be increased, the length of the roller shaft and the number of the roller rings in one group of the roller shaft assemblies can be increased during manufacturing, so that the requirement can be met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a grate cooler system provided by an embodiment of the present invention;

FIG. 2 is a top view of a grate cooler system provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a sectional view B-B of FIG. 1;

FIG. 5 is a cross-sectional view of C-C of FIG. 1;

Fig. 6 is a schematic structural view of an ultra-high temperature roller crusher according to an embodiment of the present invention;

FIG. 7 is a view in the A direction of FIG. 6;

FIG. 8 is a schematic view of a roller assembly according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view of the internal structure of a roller assembly provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of a roll-axis water cooling system according to an embodiment of the present invention;

FIG. 11 is an enlarged view of a portion of a roll-axis water cooling system provided by an embodiment of the present invention;

FIG. 12 is a schematic view of a housing assembly provided in an embodiment of the present invention;

fig. 13 is a schematic view illustrating the direction of cooling air in the housing assembly according to an embodiment of the present invention.

Wherein: 101. a section of grate bed; 102. a two-stage grate bed; 201. an upper housing; 202. a two-stage upper housing; 2011. secondary air taking out the air port; 2012. tertiary air taking out an air port; 2013. a high-temperature waste heat air taking port; 2021. a low-temperature waste heat air taking port; 203. a lower housing; 204. a two-stage lower housing; 300. an ultra-high temperature roller crusher; 400. partition boards; 501. an air chamber separation plate; 502. high temperature wind shielding wall; 401. a first cooling zone; 4011. a first cooling partition; 4012. a second cooling partition; 402. a second cooling zone; 601. a cooling medium inlet; 602. a blower; 701. a hydraulic cylinder; 702. a hydraulic pipe; 703. a hydraulic station; 800. discharging a chute;

1. A roller assembly; 2. a housing assembly; 3. a transmission device; 4. a roll shaft water cooling system; 5. the shell air cooling system; 11. a roll shaft; 12. a positioning key; 13. a roller ring; 14. a top ring; 15. a protective sleeve; 16. a transmission shaft head; 17. a driven shaft head; 171. a step; 18. a bearing seat; 21. a bottom frame; 22. a front end wall; 23. a rear end wall; 24. a cross beam; 25. a seal box; 26. a first build-up welding wear plate; 27. a second build-up welding wear plate; 31. a motor; 32. a speed reducer; 33. a coupling; 41. a water inlet pipeline in the shaft; 42. backwater damping blades; 43. a water inlet sealing ring; 431. a through hole; 44. a backwater sealing ring; 441. a protruding portion; 45. a water return pipeline is arranged outside the shaft; 51. an air inlet pipeline; 52. an air outlet pipeline; 53. a blower.

The dotted arrow lines indicate the direction of the air flow, and the solid arrow lines indicate the direction of the cement clinker flow.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 5, the embodiment provides a cement kiln total oxygen combustion multi-medium partition air supply grate cooler system capable of realizing energy saving and consumption reduction, which comprises a grate cooler shell, a grate bed, an ultra-high temperature roller crusher 300, partition baffles 400, an air chamber partition 501, a high temperature wind shielding wall 502, a hydraulic power system and a blanking chute 800.

The grate bed is positioned inside the grate cooler shell. The grate bed is divided into two sections, and a section of grate bed 101 which is close to the feed opening of the rotary kiln is also a first cooling area 401; adjacent to the grate cooler discharge opening is a two stage grate bed 102, also a second cooling zone 402.

The grate cooler is characterized in that the grate cooler shell is divided into an upper shell and a lower shell, a grate bed is arranged between the upper shell and the lower shell, a sealed cabin is formed between the grate bed and the lower shell, a ventilation grate plate is paved on the grate bed, ventilation holes communicated with the cavity of the lower shell are formed below the grate bed, cement clinker is arranged above the grate plate, and cooling medium is introduced below the grate plate to cool the clinker. The upper shell is positioned above the grate bed and is divided into two sections, wherein a section of upper shell 201 is arranged above the first section of grate bed 101, and a section of upper shell 202 is arranged above the second section of grate bed 102. The lower shell is positioned below the grate bed and is divided into two sections, a section of lower shell 203 is positioned below the first section of grate bed 101, and a section of lower shell 204 is positioned below the second section of grate bed 102. The first-stage grate 101 is placed between the first-stage upper shell 201 and the first-stage lower shell 203, and the second-stage grate 102 is placed between the second-stage upper shell 202 and the second-stage lower shell 204.

The ultra-high temperature roller crusher 300 is positioned between the first-stage grate bed 101 and the second-stage grate bed 102, a feed inlet is arranged on the front end face of the first-stage upper shell 201, after the high-temperature clinker at 1400 ℃ comes out of the rotary kiln, the clinker enters the grate cooler from the front end face of the first-stage upper shell 201 and falls onto the first-stage grate bed 101 to be cooled and conveyed, and after the clinker with the temperature of 850 ℃ falls into the ultra-high temperature roller crusher 300 from the first-stage grate bed 101 to be crushed, the clinker is crushed into clinker particles with the granularity of less than 25mm, and then the clinker particles enter the second-stage grate bed 102 to be conveyed and cooled continuously.

The partition plate 400 is located above the rear end wall 23 of the ultra-high temperature roller crusher 300, blocks the first section of upper shell 201 and the second section of upper shell 202, divides the grate cooler into two independent first cooling areas 401 and second cooling areas 402, is arranged between the first section of upper shell 201 and the first section of grate bed 101, is arranged between the second section of upper shell 202 and the second section of grate bed 102, and completely isolates the first cooling areas 401 from the second cooling areas 402 by the partition plate 400, and blocks air flow between the first cooling areas 401 and the second cooling areas 402. The partition plate 400 realizes the isolation and sectional cooling on the grate cooler equipment body, so that the air of the second cooling zone 402 and the high-concentration carbon dioxide smoke of the second cooling partition 4012 are completely isolated, the concentration of the high-temperature carbon dioxide waste gas entering the kiln tail preheater system is ensured not to be reduced, and the carbon enrichment effect of the cement production system is improved. The first cooling zone 401 is further subdivided into a first cooling zone 4011 and a second cooling zone 4012, wherein the first cooling zone 4011 is located near the feed opening of the rotary kiln, and the second cooling zone 4012 is located near the ultra-high temperature roller crusher 300.

The inside of the lower shell 203 is provided with an independent air chamber partition plate 501, the lower shell 203 is divided into two independent areas, the two independent areas correspond to the first cooling partition 4011 and the second cooling partition 4012 of the grate 101, and the air chamber partition plate 501 is used for isolating the mixed gas of O ₂/CO₂ and the high-concentration carbon dioxide gas and preventing the two cooling mediums from being mixed in the lower shell 203.

The high-temperature wind shielding wall 502 is hung at the top of the upper section of the upper shell 201, the high-temperature wind shielding wall 502 is 1.5m in height, 400mm in thickness and the same in width as the upper shell of the grate cooler, and the bottom of the high-temperature wind shielding wall 502 is about 2m away from the grate bed 101. The location of the high temperature wind shield 502 is directly above the plenum divider 501 boundaries of the first cooling partition 4011 and the second cooling partition 4012. The high-temperature wind shielding wall 502 has a certain space from the first section grate bed 101, but does not completely separate the first cooling partition 4011 from the second cooling partition 4012, so that the cross wind between the mixed gas of the high-temperature O ₂/CO₂ and the high-temperature high-concentration carbon dioxide waste gas is reduced as much as possible, the oxygen concentration is prevented from being reduced, the combustion of fuel in a cement burning system is further influenced, the utilization rate of pure oxygen is improved, and the cost is reduced.

The hydraulic power system is used for providing power for the movement of the grate beds to achieve the purpose of conveying clinker, the two sections of grate beds perform step-by-step operation along the material flow direction, and the clinker is sent into the two sections of grate beds 102 from the first section of grate bed 101 and then sent into the blanking chute 800. The hydraulic power system includes a hydraulic station 703, a hydraulic line 702, and a hydraulic cylinder 701. The hydraulic station 703 is positioned outside the grate cooler body and provides power for the hydraulic cylinder 701, the hydraulic cylinder 701 is fixed below the grate bed, the grate bed is pushed to reciprocate, and the hydraulic pipe 702 is connected with the hydraulic station 703 and the hydraulic cylinder 701. The hydraulic cylinder 701 and the hydraulic pipe 702 which are positioned below the grate bed are made of high-temperature resistant materials, can resist the high temperature of 120 ℃, and the hydraulic station 703 is provided with an independent water cooling system, so that the temperature of hydraulic oil returned from the hydraulic cylinder 701 can be reduced from 120 ℃ to below 50 ℃.

Rectangular cooling medium inlets 601 are respectively formed in the side surfaces of the lower shell corresponding to the first cooling partition 4011, the second cooling partition 4012 and the second cooling partition 402, the cooling medium inlets 601 of each region are connected with air blowers 602, and a person skilled in the art can set the number of the cooling medium inlets and the number of the air blowers according to requirements, so that air is supplied to each region for cooling clinker on the grate bed. The top of the first upper casing 201 is provided with a secondary air taking port 2011 and a tertiary air taking port 2012 corresponding to the first cooling partition 4011, and a high temperature waste heat taking port 2013 corresponding to the second cooling partition 4012, and the top of the second upper casing 202 is provided with a low temperature waste heat taking port 2021 corresponding to the second cooling partition 402.

The first cooling partition 4011 is filled with a mixed gas of pure oxygen and high-concentration carbon dioxide, and the mixed gas is subjected to heat exchange with clinker through a first-stage grate 101 to cool the clinker on one hand and obtain a mixed gas of high-temperature O ₂/CO₂ with the temperature of more than 1100 ℃. Before the high-temperature wind shielding wall 502, the top of the upper shell 201 is provided with a secondary air taking port 2011 connected with the rotary kiln and a tertiary air taking port 2012 connected with the decomposing furnace, and the mixed gas of the high-temperature O ₂/CO₂ enters the rotary kiln and the decomposing furnace to support fuel combustion.

The second cooling partition 4012 is blown with high-concentration carbon dioxide flue gas, and performs heat exchange with clinker through the first-stage grate 101 to cool the clinker on one hand and obtain high-temperature high-concentration carbon dioxide waste gas with the temperature of more than 800 ℃. After the high-temperature wind shielding wall 502 and before the partition plate 400, a high-temperature waste heat air taking opening 2013 is formed in the top of one section of the upper shell 201 and is connected with a kiln tail preheater system, and high-temperature high-concentration carbon dioxide waste gas enters the kiln tail preheater system to recycle heat and supplement carbon.

The clinker cooled in the first cooling zone 401 falls into the ultra-high temperature roller crusher 300, and after being crushed, enters the second cooling zone 402. The second cooling area 402 blows normal temperature air, and the air is subjected to heat exchange with clinker through the two-stage grate bed 102, so that the clinker is further cooled on one hand, and waste gas is obtained on the other hand. After the partition plate 400, a low-temperature waste heat air taking port 2021 is formed at the top of the two-stage upper shell 202, and the waste gas enters a waste heat power generation system or is discharged into the atmosphere. The partition plate 400 is used as a partition plate of the first cooling zone 401 and the second cooling zone 402, has good sealing property, completely isolates the waste gas of the first cooling zone 401 and the second cooling zone 402, and avoids the waste of oxygen and the escape of carbon dioxide caused by the fact that the oxygen and the carbon dioxide of the first cooling zone 401 enter the second cooling zone 402; and simultaneously, the waste gas of the second cooling zone 402 is prevented from entering the first cooling zone 401, so that the concentration of carbon dioxide is reduced, and the carbon enrichment is not facilitated.

The blanking slide carriage 800 is positioned at the tail part of the two-section lower shell 204, the two-section grate bed 102 conveys clinker into the blanking slide carriage 800 at the tail part of the grate cooler, and the cooled clinker with the temperature less than 100 ℃ is discharged out of the grate cooler through the blanking slide carriage 800.

The width of the first-stage grate bed 101 is equal to that of the second-stage grate bed 102, the length ratio is 4:7-8, and the cooling area ratio is 4:7-8. The total cooling air quantity required by cooling unit clinker of the grate bed is 2.0Nm ³/kg.cl, and the cooling air quantity ratio of the first cooling zone 401 to the second cooling zone 402 is less than or equal to 0.8:1.2. The air quantity for the first-stage grate bed 101 can be reduced to about 0.8Nm ³/kg/cl of unit clinker: the consumption of the mixed gas of O ₂/CO₂ blown into the first cooling partition 4011 is about 0.4m ³/kg/cl, and the mixed gas of high-temperature O ₂/CO₂ obtained through heat exchange with clinker enters a rotary kiln and a decomposing furnace, so that the combustion of the fuel in the kiln is supported; the high-concentration carbon dioxide waste gas blown into the second cooling zone 4012 is about 0.4Nm ³/kg/cl, and the high-temperature high-concentration carbon dioxide waste gas is obtained through heat exchange with clinker, so that the clinker can be cooled to about 850 ℃, and the high-temperature waste gas is led into a kiln tail preheater system, and CO ₂ is captured after heat is utilized.

Referring to fig. 6 to 13, the ultra-high temperature roller crusher 300 includes a roller assembly 1, a housing assembly 2, a transmission 3, a roller water cooling system 4, and a housing air cooling system 5.

The two ends of each roll shaft assembly 1 are rotatably arranged on the shell assembly 2 through a driving shaft head 16 and a driven shaft head 17 respectively, and the driving shaft head 16 end of each roll shaft assembly 1 is connected with a transmission device 3 for driving the roll shaft assembly 1 to rotate; the roller shaft 11 and the driven shaft head 17 of the roller shaft assembly 1 are hollow structures, the roller shaft water cooling system 4 is connected with the driven shaft head 17 and stretches into the roller shaft 11, and the roller shaft 11 is cooled in a water inlet and return mode; the inside hollow structure that is the intercommunication of casing subassembly 2, the air intake and the air outlet of casing subassembly 2 are the diagonal setting, casing wind cooling system 5 sends into the cooling air by casing subassembly 2 air intake and divides two ways to cool off casing subassembly 2 to discharge by the air outlet.

Each roll shaft assembly 1 consists of a roll shaft 11, a positioning key 12, roll rings 13, a top ring 14, a protective sleeve 15, a transmission shaft head 16, a driven shaft head 17 and a bearing seat 18, wherein the positioning key 12 is fixed on the roll shaft 11, the roll rings 13 are arranged in a plurality, each roll ring 13 is sleeved on the roll shaft 11 along the axial direction through the positioning key 12, and the roll rings 13 are made of a material which can have excellent heat resistance, wear resistance and thermal fatigue cycle resistance at the ultra-high temperature of 1000 ℃; the roller shafts 11 positioned on two sides of the roller rings 13 in rows are respectively sleeved with the top rings 14, the roller shafts 11 outside each top ring 14 are respectively sleeved with the protective sleeves 15, the end faces of two ends of the roller shafts 11 are respectively connected and fixed with the driving shaft heads 16 and the driven shaft heads 17, the bearing seats 18 are respectively arranged on the driving shaft heads 16 and the driven shaft heads 17, and each bearing seat 18 is connected and fixed with the shell assembly 2.

The transmission device 3 consists of a motor 31, a speed reducer 32 and a shaft coupling 33, wherein a motor shaft of the motor 31 is connected with an input shaft of the speed reducer 32, and an output shaft of the speed reducer 32 is connected with the transmission shaft head 16 through the shaft coupling 33.

The roll shaft water cooling system 4 consists of an in-shaft water inlet pipeline 41, water return damping blades 42, an out-of-shaft water inlet pipeline 45 and a sealing device, wherein the in-shaft water inlet pipeline 41 is positioned in an inner space formed by a roll shaft 11 and a driven shaft head 17, the water return damping blades 42 are arranged between the outer wall of the in-shaft water inlet pipeline 41 and the inner wall of the roll shaft 11, the water return damping blades 42 are uniformly distributed, and a water return cavity is formed between the outer wall of the in-shaft water inlet pipeline 41 and the inner wall of the roll shaft 11 and between the outer wall of the driven shaft head 17; the outer water inlet and return pipeline 45 of the shaft is divided into two layers, the inner layer is provided with a water inlet interface, the outer layer is provided with a water return interface, the inner layer of the outer water inlet and return pipeline 45 of the shaft is communicated with the inner water inlet pipeline 41 of the shaft, and the outer layer of the outer water inlet and return pipeline 45 of the shaft is communicated with the water return cavity.

The sealing device comprises a water inlet sealing ring 43 and a water return sealing ring 44, the end face of the driven shaft head 17 is of a stepped structure with a step 171, the water inlet sealing ring 43 is sleeved on the inner layer of the outer water inlet and return pipeline 45 and is fixed on the inner water inlet pipeline 41, so that the space between the inner layer of the outer water inlet and return pipeline 45 and the inner water inlet pipeline 41 is sealed by the water inlet sealing ring 43, the periphery of the water inlet sealing ring 43 extends to the step 171 of the driven shaft head 17, and a through hole 431 is formed in the position, corresponding to a water return cavity, of the water inlet sealing ring 43; the backwater sealing ring 44 is of a '╡' structure with a protruding part 441, the backwater sealing ring 44 is sleeved on the outer layer of the shaft outer water inlet and return pipeline 45 and is fixed on the driven shaft head 17, the protruding part 441 is attached to the wall surface of the step 171 of the driven shaft head 17, so that the space between the outer layer of the shaft outer water inlet and return pipeline 45 and the driven shaft head 17 is sealed through the backwater sealing ring 44, and the sealing effect of the water inlet and return position is further ensured.

The shell assembly 2 consists of a bottom frame 21, a front end wall 22, a rear end wall 23, a cross beam 24, a sealing box 25, a first surfacing wear plate 26 and a second surfacing wear plate 27; the bottom frames 21 are positioned at the left side and the right side of the shell assembly 2, the front end wall 22 is positioned at the front end of the shell assembly 2, two ends of the front end wall 22 are fixedly connected with the bottom frames 21, the rear end wall 23 is positioned at the rear end of the shell assembly 2, two ends of the rear end wall 23 are fixedly connected with the bottom frames 21, the cross beams 24 and the sealing boxes 25 are positioned at the left side and the right side of the shell assembly 2, two ends of each cross beam 24 are respectively fixed on the front end wall 22 and the rear end wall 23, and each sealing box 25 is positioned between the corresponding cross beam 24 and the corresponding bottom frame 21; the first surfacing wear-resistant plate 26 is installed at the upper ends of the inner walls of the front end wall 22 and the rear end wall 23, and the second surfacing wear-resistant plate 27 is installed at the upper ends of the inner walls of the cross beam 24.

The front end wall 22, the rear end wall 23, the cross beam 24 and the sealing box 25 are all made of steel plates by means of assembly welding, the inside of the front end wall 22, the rear end wall 23, the cross beam 24 and the sealing box 25 are of hollow structures, holes are reserved at the mutual contact positions of the front end wall 22, the rear end wall 23, the cross beam 24 and the sealing box 25, a cavity which is connected in series is formed inside the shell assembly 2, an interface is respectively arranged on one side of the front end wall 22 and one side of the rear end wall 23, the interface of the front end wall 22 is an air inlet, and the interface of the rear end wall 23 is an air outlet.

The shell air cooling system 5 is composed of an air inlet pipeline 51, an air outlet pipeline 52 and a fan 53, wherein the air inlet pipeline 51 is connected with an interface of the front end wall 22, the air outlet pipeline 52 is connected with an interface of the rear end wall 23, and the fan 53 is positioned at an inlet of the air inlet pipeline 51.

The ultra-high temperature roller crusher 300 of the present invention requires at least 2 roller shaft assemblies 1 and 2 driving devices 3 to achieve the crushing function, and the specific number is determined according to the specification of the grate cooler and the production yield. In this embodiment, 4 roller assemblies 1 are described in detail.

Referring to fig. 7, 8, 9 and 12, the roll shaft assembly 1 is composed of a roll shaft 11, a positioning key 12, a roll ring 13, a top ring 14, a protecting sleeve 15, a driving shaft head 16, a driven shaft head 17 and a bearing seat 18. The roll shaft 11 is a hollow shaft, and the hollow interior is used for installing a roll shaft water cooling system 4 to provide cooling protection for the roll shaft 11; the positioning key 12 is fixed on the roll shaft 11 in a welding mode, and the roll shaft 11 drives the roll ring 13 to move through the positioning key 12 when rotating; the number of the roller rings 13 is set to be a plurality, the roller rings 13 are sleeved on the roller shaft 11 along the positioning key 12 in the axial direction, the number of the roller rings 13 on the roller shaft 11 is determined according to the width of the ultra-high temperature roller crusher 300, the roller rings 13 are made of materials which can have excellent heat resistance, wear resistance and thermal fatigue cycle resistance at the ultra-high temperature of 1000 ℃, for example, the wear-resistant alloy steel for greatly alternating working condition temperature and the wear-resistant alloy steel in the preparation method thereof disclosed in the independent innovative and developed Chinese patent publication No. CN109763069A can be adopted, so that the wear-resistant alloy steel can reliably and permanently work at the working condition temperature of 1000 ℃ independently under the protection of any cooling medium such as water or air; a top ring 14 is respectively arranged on the roll shafts 11 on two sides of the row of roll rings 13, the top ring 14 and the roll shafts 11 are fixed together through bolts, and the roll rings 13 are limited to slide left and right in the axial direction; on the roll shaft 11 outside each top ring 14, one side of a protective sleeve 15 is arranged on the roll shaft 11, and the protective sleeve 15 is fixed with the roll shaft 11 through bolts to perform heat insulation protection on the roll shaft 11; the driving shaft head 16 and the driven shaft head 17 are fixedly connected together through respective end surfaces and the end surfaces of the roll shafts 11 through bolts. The solid transmission shaft head 16 is connected with a coupling 33 of the transmission device 3, the coupling 33 is connected with a speed reducer 32 and then is connected with a motor 31 to provide driving power for the roll shaft assembly 1, the speed reducer 32 is a corner planetary speed reducer, when the transmission device 3 operates, the mechanical energy of the motor 31 rotating at a high speed realizes the low-speed and stable rotation of the roll shaft 11 of the roll shaft assembly 1 connected with the speed reducer 32 through the coupling 33 after the energy conversion of the speed reducer 32; the hollow driven shaft head 17 is connected with the roll shaft water cooling system 4 to provide water cooling protection for the roll shaft 11. One of two sides of the bearing seat 18 is respectively assembled with the driving shaft head 16 and the driven shaft head 17, and plays a role in supporting and fixing the roll shaft assembly 1, and the bearing seat 18 is fixedly connected with the bottom frame 21 of the shell assembly 2 through bolts, so that the roll shaft assembly 1 and the shell assembly 2 are assembled together.

The shell assembly 2 consists of a bottom frame 21, a front end wall 22, a rear end wall 23, a cross beam 24, a sealing box 25, a first surfacing wear plate 26 and a second surfacing wear plate 27. When the high-temperature granular materials enter the roller crusher, the end wall contacted firstly is a front end wall 22, the other end wall is a rear end wall 23, the front end wall and the rear end wall are named according to the sequence of the contacted materials, and the structures of the front end wall and the rear end wall are not different; the bottom frames 21 are symmetrically arranged on two sides of the shell assembly 2, the bottom frames 21 on two sides of the front end are connected and fixed with the front end wall 22 through bolts and nuts, and the bottom frames 21 on two sides of the rear end are connected and fixed with the rear end wall 23 through bolts and nuts; after the roll shaft assembly 1 is assembled except the bearing seat 18, a sealing box 25 is firstly arranged on one side of two sides of the shell assembly 2, the sealing boxes 25 are arranged on two sides of the top ring 14, the inner walls of the sealing boxes 25 are matched with the protective sleeves 15, the bearing seat 18 is arranged, at the moment, the roll shaft assembly 1 is integrally arranged on the bottom frames 21 on two sides, the bearing seat 18 and the sealing boxes 25 are respectively fixed with the bottom frames 21 through positioning mounting holes, and the other three roll shaft assemblies 1 are arranged in the same mode. The two cross beams 24 are respectively placed at the two ends of the front end wall 22 and the rear end wall 23 and above the corresponding sealing boxes 25, and are respectively connected and fixed together through bolts and nuts, and the sealing boxes 25 are positioned between the cross beams 24 and the bottom frame 21. The high-temperature-resistant first surfacing wear-resistant plate 26 is connected to the upper ends of the inner walls of the front end wall 22 and the rear end wall 23 through bolts and nuts, the high-temperature-resistant second surfacing wear-resistant plate 27 is connected to the upper ends of the inner walls of the cross beams 24 through bolts and nuts, so that scouring of materials is prevented, the front end wall 22, the rear end wall 23 and the cross beams 24 are protected, gaps are reserved between the first surfacing wear-resistant plate 26 and the roller ring 13 and between the second surfacing wear-resistant plate 27 and the top ring 14 after installation, and the gaps do not interfere with each other; at this time, the housing assembly 2 is substantially molded, and the assembly with the roller assembly 1 is completed.

Referring to fig. 10 and 11, the principle of operation of the roll-axis water cooling system 4 is shown.

The roll shaft water cooling system 4 consists of an in-shaft water inlet pipeline 41, a backwater damping blade 42, a water inlet sealing ring 43, a backwater sealing ring 44 and an out-shaft water inlet pipeline 45. The external water inlet and return pipeline 45 is divided into two layers, wherein the inner layer is used for water inlet, a water inlet interface is arranged, the outer layer is used for water return, and a water return interface is arranged; when the roll shaft water cooling system 4 is in normal operation, cooling water enters from a water inlet interface of the shaft outer water inlet and return pipeline 45, enters into the shaft inner water inlet pipeline 41 from the inner layer of the shaft outer water inlet and return pipeline 45, sealing between the inner layer of the shaft outer water inlet and return pipeline 45 and the shaft inner water inlet pipeline 41 is realized by a water inlet sealing ring 43, flows out from the other end of the shaft inner water inlet pipeline 41, and returns along a water return path consisting of the outer wall of the shaft inner water inlet pipeline 41, the inner wall of the roll shaft 11, the inner wall of the driven shaft head 17 and the outer layer of the shaft outer water inlet and return pipeline 45; the backwater damping blades 42 are arranged between the outer wall of the in-shaft water inlet pipeline 41 and the inner wall of the roll shaft 11, so that the water flow speed is reduced, the cooling water and the inner wall of the roll shaft 11 have sufficient contact time, and heat exchange is realized; the water flows out from the water return interface of the outer layer of the shaft outer water inlet and return pipeline 45, and the sealing between the outer layer of the shaft outer water inlet and return pipeline 45 and the driven shaft head 17 is realized by a water return sealing ring 44. During cooling, the in-shaft water inlet pipeline 41, the water return damping blade 42, the water inlet sealing ring 43, the water return sealing ring 44 and the roller shaft 11 are relatively static and rotate along with the rotation of the roller shaft 11; the off-axis water inlet and return pipe 45 is fixed and does not move with the roll shaft 11. The whole process completes the water cooling protection of the roll shaft 11, and realizes the safe and stable operation of the working temperature within 100 ℃.

Referring to fig. 12 and 13, the housing wind cooling system 5 operates on the principle.

The front end wall 22, the rear end wall 23, the cross beam 24 and the sealing box 25 are all made of common steel plates by assembly welding, the inside of the sealing box is of a cavity structure, and ventilation holes are reserved at contact positions of every two of the sealing box to form a cavity which is connected in series. The interface of the front end wall 22 is an air inlet and is connected with an air inlet pipeline 51; the interface of the rear end wall 23 is an air outlet and is connected with an air outlet pipeline 52; cooling air is provided by the fans 53 of the housing air cooling system 5 to provide cooling protection for the housing assembly 2. Cooling air enters from an air inlet pipeline 51 connected with an interface of the front end wall 22 of the shell assembly, and the cooling air is divided into two parts after entering: a part of the air passes through the whole front end wall 22, one side cross beam 24 and a sealing box 25 and then reaches the interface of the rear end wall 23; the other part passes through the other side cross beam 24, the sealing box 25 and the whole rear end wall 23 and then reaches the interface of the rear end wall 23; the two hot air parts after heat exchange are converged and discharged from an air outlet pipeline 52 connected with the interface of the rear end wall 23 of the shell assembly. The whole process completes the air cooling protection of the shell assembly 2, and realizes stable operation in safe working temperature.

In summary, the cooling area ratio of the first-stage grate bed 101 to the second-stage grate bed 102 is adjusted to be 4:7-8 by the ultra-high temperature roller crusher 300, and the cooling air volume ratio of the first cooling area 401 to the second cooling area 402 is less than or equal to 0.8:1.2. The amount of the mixed gas blown into the first cooling partition 4011 is about 0.4m ³/kg/cl; the amount of the carbon dioxide gas blown into the second cooling section 4012 was about 0.4Nm ³/kg. Cl. The lower air quantity of the first-stage grate bed 101 ensures the oxygen consumption for kiln fuel combustion, and simultaneously, the lower high-temperature carbon dioxide waste gas quantity can reduce the heat consumption and the electricity consumption of the whole cement burning system, can well match the total oxygen combustion carbon enriched cement production process, effectively reduces the waste gas quantity entering the preheater system, further, can reduce the equipment size of the preheater system, and ensures that the construction investment of the whole preheater system is lower.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A multi-medium partition air supply grate cooler system capable of realizing energy saving and consumption reduction of cement kiln total oxygen combustion comprises a grate cooler shell, a grate bed, a roller crusher, partition baffles, an air chamber partition plate and a high-temperature wind shielding wall;

Cooling medium inlets are formed in the side surfaces of the grate cooler shell, which correspond to the first cooling partition, the second cooling partition and the second cooling partition respectively and are positioned below the grate bed, and the cooling medium inlets of each region are connected with an air blower; the gas introduced into the first cooling zone is mixed gas of pure oxygen and high-concentration carbon dioxide, the gas introduced into the second cooling zone is high-concentration carbon dioxide flue gas, and the gas introduced into the second cooling zone is air; the top of the first cooling partition is provided with a secondary air taking port and a tertiary air taking port, the top of the second cooling partition is provided with a high-temperature waste heat taking port, and the top of the second cooling partition is provided with a low-temperature waste heat taking port; the method is characterized in that:

The widths of the first-section grate bed and the second-section grate bed are equal, the length ratio is 4:7-8, and the cooling area ratio is 4:7-8; the gas consumption of the first cooling partition of the first-stage grate bed is less than or equal to 0.4m ³/kg/cl, and the gas consumption of the second cooling partition of the first-stage grate bed is less than or equal to 0.4Nm ³/kg/cl; the cooling air volume ratio of the cooling area of the first-stage grate bed to the cooling area of the second-stage grate bed is less than or equal to 0.8:1.2;

The roller crusher is an ultra-high temperature roller crusher, and further comprises a cooling system, wherein the cooling system comprises a roller shaft water cooling system for providing water cooling protection for a roller shaft of the roller shaft assembly and a shell air cooling system for providing cooling protection for the shell assembly; the roller shaft and the driven shaft head are hollow structures, and the roller shaft water cooling system is connected with the driven shaft head and stretches into the roller shaft to cool the roller shaft in a water inlet and return mode; the shell air cooling system sends cooling air into the shell assembly through the shell assembly air inlet to cool the shell assembly in two paths and discharges the cooling air through the air outlet;

The roll shaft water cooling system consists of an in-shaft water inlet pipeline, water return damping blades, an out-shaft water inlet pipeline and a sealing device, wherein the in-shaft water inlet pipeline is positioned in an inner space formed by a roll shaft and a driven shaft head, the water return damping blades are arranged between the outer wall of the in-shaft water inlet pipeline and the inner wall of the roll shaft, the water return damping blades are uniformly distributed, and a water return cavity is formed between the outer wall of the in-shaft water inlet pipeline and the inner wall of the roll shaft and between the outer wall of the driven shaft head; the outer water inlet and return pipeline of the shaft is divided into two layers, the inner layer is provided with a water inlet interface, the outer layer is provided with a water return interface, the inner layer of the outer water inlet and return pipeline of the shaft is communicated with the inner water inlet pipeline of the shaft, and the outer layer of the outer water inlet and return pipeline of the shaft is communicated with the water return cavity; the inner layer of the shaft outer water inlet and return pipeline and the inner water inlet pipeline, and the outer layer of the shaft outer water inlet and return pipeline and the driven shaft head are sealed by sealing devices;

the sealing device comprises a water inlet sealing ring and a water return sealing ring, wherein the water inlet sealing ring seals the inner layer of the water inlet and return pipeline outside the shaft and the water inlet pipeline inside the shaft, and the water return sealing ring seals the outer layer of the water inlet and return pipeline outside the shaft and the driven shaft head;

The end face of the driven shaft head is of a stepped structure with steps, the water inlet sealing ring is sleeved on the inner layer of the water inlet and return pipeline outside the shaft and is fixed on the water inlet pipeline inside the shaft, the periphery of the water inlet sealing ring extends to the steps of the driven shaft head, and a through hole is formed in the position, corresponding to the water return cavity, of the water inlet sealing ring; the backwater sealing ring is of a '╡' structure with a protruding part, the backwater sealing ring is sleeved on the outer layer of the water inlet and backwater pipeline outside the shaft and is fixed on the driven shaft head, and the protruding part is attached to the wall surface of the step of the driven shaft head;

the shell air cooling system consists of an air inlet pipeline, an air outlet pipeline and a fan, wherein the air inlet pipeline is connected with an air inlet of the shell assembly, the air outlet pipeline is connected with an air outlet of the shell assembly, and the fan is positioned at an inlet of the air inlet pipeline;

The shell assembly consists of a bottom frame, a front end wall, a rear end wall, a cross beam, a sealing box, a first surfacing wear-resistant plate and a second surfacing wear-resistant plate; the bottom frame is positioned at the left side and the right side of the shell assembly, the front end wall is positioned at the front end of the shell assembly, the two ends of the front end wall are fixedly connected with the bottom frame, the rear end wall is positioned at the rear end of the shell assembly, the two ends of the rear end wall are fixedly connected with the bottom frame, the cross beam and the sealing box are positioned at the left side and the right side of the shell assembly, the two ends of each cross beam are respectively fixed on the front end wall and the rear end wall, and each sealing box is positioned between the corresponding cross beam and the bottom frame; the first surfacing wear-resistant plates are arranged at the upper ends of the inner walls of the front end wall and the rear end wall, and the second surfacing wear-resistant plates are arranged at the upper ends of the inner walls of the cross beams;

The front end wall, the rear end wall, the cross beam and the sealing box are all manufactured by adopting steel plate assembly welding, the inside is of a hollow structure, holes are reserved at the mutual contact positions of the front end wall, the rear end wall, the cross beam and the sealing box in pairs, a cavity connected in series is formed inside the shell assembly, an interface is respectively arranged on one side of the front end wall and one side of the rear end wall, the interface of the front end wall is an air inlet, and the interface of the rear end wall is an air outlet.

2. The multi-medium partition air supply grate cooler system capable of realizing energy saving and consumption reduction for the cement kiln according to claim 1, wherein the height of the bottom of the high-temperature wind shielding wall from a section of grate bed is 2m, the height of the high-temperature wind shielding wall is 1.5m, the thickness of the high-temperature wind shielding wall is 400mm, the width of the high-temperature wind shielding wall is the same as that of a grate cooler shell, and the cross air between the first cooling partition and the second cooling partition is reduced.

3. The multi-medium zoned air supply grate cooler system capable of realizing energy saving and consumption reduction for the cement kiln total oxygen combustion, which is disclosed in claim 1, is characterized in that a hydraulic power system for providing power for the movement of the grate beds is arranged below each of the first-stage grate bed and the second-stage grate bed, the hydraulic power system comprises a hydraulic station, a hydraulic pipe and a hydraulic cylinder, the hydraulic station is positioned outside the grate cooler, the hydraulic cylinder is positioned below the grate beds, and the hydraulic pipe is connected with the hydraulic station and the hydraulic cylinder; the hydraulic cylinder and the hydraulic pipe are made of high-temperature resistant materials, and can resist the high temperature of 120 ℃; the hydraulic station is provided with an independent water cooling system, so that the temperature of hydraulic oil returned from the hydraulic cylinder can be reduced from 120 ℃ to below 50 ℃.

4. The multi-medium zoned air supply grate cooler system for the cement kiln capable of realizing energy conservation and consumption reduction according to claim 1, wherein the roller ring of the roller shaft assembly is made of a material which can have excellent heat resistance, wear resistance and thermal fatigue cycle resistance at the ultra-high temperature of 1000 ℃.

5. The multi-medium partition air supply grate cooler system capable of achieving total oxygen combustion of a cement kiln and reducing consumption according to claim 1, wherein each roll shaft assembly consists of a roll shaft, a positioning key, roll rings, top rings, a protective sleeve, a transmission shaft head, a driven shaft head and bearing seats, the positioning key is fixed on the roll shaft, the roll rings are provided with a plurality of roll rings, each roll ring is sleeved on the roll shaft along the axial direction through the positioning key, the top rings are sleeved and fixed on the roll shafts positioned on two sides of each roll ring in a row, the protective sleeve is sleeved and fixed on the roll shaft outside each top ring, the end faces of two ends of the roll shaft are connected and fixed with the transmission shaft head and the driven shaft head respectively, the bearing seats are mounted on the transmission shaft head and the driven shaft head respectively, and each bearing seat is connected and fixed with the shell assembly.

6. The multi-medium zoned air supply grate cooler system capable of achieving energy saving and consumption reduction of the cement kiln is characterized in that the transmission device comprises a motor, a speed reducer and a shaft coupling, a motor shaft of the motor is connected with an input shaft of the speed reducer, and an output shaft of the speed reducer is connected with a transmission shaft head of a roll shaft assembly through the shaft coupling.