CN111551053A - Cooling device for high-temperature powdery material and using method thereof - Google Patents
Cooling device for high-temperature powdery material and using method thereof Download PDFInfo
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- CN111551053A CN111551053A CN202010470065.8A CN202010470065A CN111551053A CN 111551053 A CN111551053 A CN 111551053A CN 202010470065 A CN202010470065 A CN 202010470065A CN 111551053 A CN111551053 A CN 111551053A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
- F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D11/00—Heat-exchange apparatus employing moving conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F5/00—Elements specially adapted for movement
- F28F5/04—Hollow impellers, e.g. stirring vane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F5/00—Elements specially adapted for movement
- F28F5/06—Hollow screw conveyors
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Abstract
The invention discloses a cooling device for high-temperature powdery materials, which comprises a cooling bin, a spiral cooler and a stirring barrel, wherein a feeding hole of the spiral cooler is connected with a discharging hole of the cooling bin; the discharge hole of the spiral cooler is connected with the feed inlet of the stirring barrel; the outer wall of the cooling bin is provided with a bin cooling water jacket, the outer wall of the spiral cooler is provided with a spiral cooling water jacket, and a spiral reamer is arranged inside the spiral cooler. The cooling device disclosed by the invention can cool the high-temperature powdery material and recover the waste heat for effective utilization, combines direct liquid-solid heat exchange and indirect heat exchange, has the advantages of high heat exchange efficiency, low operation cost and equipment cost, stable operation, energy conservation, environmental friendliness and strong adaptability, and has important significance for cooling and waste heat utilization of the high-temperature powdery material. The invention also discloses a using method of the cooling device, which is simple to operate, low in operation cost, easy to maintain and environment-friendly.
Description
Technical Field
The invention relates to the field of mineral separation, metallurgy and environmental protection, in particular to a cooling device for high-temperature powdery materials and a using method of the cooling device.
Background
The black metal mineral resources in China, such as iron ore, manganese ore and the like, have poor natural endowments and have the characteristics of poor quality, fine quality, impurity and dispersion. According to USGS statistics, the average grade of the world iron ore is 48.82%, while the average grade of the Chinese iron ore is only 34.29%, which is far lower than the average grade in the world; the lean ore proportion is large, more than 95 percent of iron ore resources can be economically and reasonably developed and utilized only by mineral separation and enrichment, wherein the proportion of limonite, siderite and mixed iron ore is about 18 percent, and a large number of laboratory tests and production practices show that the magnetizing roasting is the only way for reasonably developing and utilizing the iron ore on a large scale; manganese ore resources in China are mainly distributed in 21 provinces and areas such as Guangxi province, Hunan province, Guizhou province, Yunnan province, Sichuan province, Fujian province, Shaanxi province and Shanxi province, the resource amount exceeds 1 hundred million tons, but the ore quality is poor, the grade is low, along with the rapid development of the electrolytic manganese industry, manganese carbonate ores are gradually depleted, the urgency of developing and utilizing manganese oxide ores is increasingly remarkable, and MnO in the manganese oxide ores2、Mn2O3And the reaction capability of the hydrate of the manganese oxide and sulfuric acid is poor, MnO can be dissolved in sulfuric acid, if manganese oxide ore is used as a raw material for electrolyzing manganese, the manganese oxide ore needs to be reduced and roasted to be converted into MnO, and then the MnO is dissolved in sulfuric acid to generate MnSO4. With the steady advance of the high-temperature pretreatment technology of ferrous metals in China, the cooling and waste heat utilization technology and equipment of roasted products gradually become bottleneck problems restricting the development of the technology, and the technology and equipment are urgently needed to be solved.
At present, water cooling and air cooling are mainly adopted at home and abroad to cool high-temperature powdery materials. The water cooling mode is to directly discharge the high-temperature powdery material into water, and cool the material to the temperature required by the subsequent treatment process by heat exchange with a large amount of water. On one hand, water cooling cannot recover a large amount of sensible heat carried by a roasted product, and is not beneficial to energy conservation and consumption reduction in a high-temperature pretreatment process; on the other hand, a large amount of dust-containing steam generated in the water cooling process can suspend the materials, so that material flow blockage is easily caused; more serious, the high-temperature powdery material directly enters water, and is easy to splash in the process of rapidly cooling the material, so that potential safety hazards exist. The air cooling mode is that a large amount of cooling air flow exchanges heat with the high-temperature material to cool the high-temperature material to the temperature required by the subsequent treatment process. However, the specific heat capacity of the gas is generally small, and a large amount of cooling gas must be consumed for cooling high-temperature materials, so that the cooling operation capital construction and operation cost are high due to the large cooling area; on the other hand, the dust-containing flue gas after heat exchange can be discharged at high altitude after being subjected to dust removal treatment, so that the hidden danger of environmental pollution exists; more importantly, the cooling of a large amount of high-temperature roasting materials must be carried out in a specific atmosphere, and secondary ore phase transformation is possible to happen to the roasting materials by adopting air cooling, so that the product quality is influenced.
Therefore, it is always the objective of those skilled in the art to develop a system for cooling and utilizing waste heat of high-temperature powdery material, which has low capital investment and operation cost, stable operation, energy saving, environmental protection and strong adaptability, and a method for cooling and utilizing waste heat of high-temperature powdery material.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background art, and provide a cooling device for high-temperature powdery materials and a using method thereof, wherein the cooling device has the advantages of low capital investment and operation cost, stable operation, energy conservation, environmental protection and strong adaptability.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a cooling device for high-temperature powdery materials comprises a cooling bin, a spiral cooler and a stirring barrel, wherein a feed inlet of the spiral cooler is connected with a discharge outlet at the bottom of the cooling bin; the discharge hole of the spiral cooler is connected with the feed inlet of the stirring barrel; the outer wall of the cooling bin is provided with a bin cooling water jacket, the outer wall of the spiral cooler is provided with a spiral cooling water jacket, and a spiral reamer is arranged inside the spiral cooler.
In the cooling device, preferably, the bin cooling water jacket is provided with a bin cooling water inlet and a bin cooling water outlet, the bin cooling water inlet is connected with the external high-level water tank through a pipeline, and the bin cooling water outlet is connected with the external waste heat utilization system through a pipeline, so that waste heat recovery can be effectively utilized; the inside of cooling feed bin is equipped with the heat exchange tube, and heat exchange efficiency is higher after adding the heat exchange tube.
In one preferable scheme of the heat exchange tube, the heat exchange tube penetrates through the cooling bin and is connected with an inner cavity of a cooling water jacket of the bin. The scheme generates hot water without generating steam, is suitable for cooling high-temperature powdery materials with less heat carried at 100-500 ℃ or high-temperature powdery materials with higher heat carried at more than 500 ℃, and has a centralized waste heat utilization mode.
The other preferable scheme is that the heat exchange tube penetrates through the cooling bin and the bin cooling water jacket, the outer wall of the bin cooling water jacket is provided with a heat exchange tube cooling water inlet and a heat exchange tube steam outlet, the heat exchange tube cooling water inlet is connected with an external high-level water pool through a pipeline, and the heat exchange tube steam outlet is connected with an external steam utilization system through a pipeline. The scheme generates hot water and water vapor, the waste heat utilization mode is more diversified, and the cooling device is more suitable for cooling high-temperature powdery materials with higher carried heat at the temperature of more than 500 ℃ or still subjected to chemical reaction to release a large amount of heat in the cooling process.
Preferably, the cooling bin is arranged below the discharge hole of the high-temperature powdery material pretreatment device, and the feed inlet of the cooling bin is connected with the discharge hole of the high-temperature powdery material pretreatment device.
Preferably, the screw cooler is arranged below the cooling bin, a screw cooling water inlet and a screw cooling water outlet are formed in the outer wall of the screw cooling water jacket, the screw cooling water inlet is connected with an external high-level water tank through a pipeline, the screw cooling water outlet is connected with an external waste heat utilization system through a pipeline, and waste heat recovery can be achieved to be effectively utilized.
Preferably, a jet ejector nozzle and a plurality of cooling water nozzles are arranged near the feed inlet of the stirring barrel, the jet ejector nozzle is connected with an external pump through a pipeline, and the plurality of cooling water nozzles are connected with an external high-level water tank through a pipeline. The ejector nozzles of the spraying device near the feed inlet of the stirring barrel are arranged, so that high-temperature powdery materials can smoothly enter the stirring barrel through the spiral cooler, and meanwhile, a plurality of cooling water nozzles are arranged in the stirring barrel, so that the temperature requirement of the powdery materials for the subsequent treatment process after being cooled is met. The stirring barrel is connected with a treatment process after the high-temperature powdery material is cooled through a cooling ore pulp outlet.
Preferably, a chimney is arranged at the top of the stirring barrel, a chimney cooling water nozzle is arranged on the chimney, and the chimney cooling water nozzle is connected with an external high-level water pool through a pipeline. The cooling water nozzles are distributed in the chimney, so that the pressure of gas in the stirring barrel is reduced, and the discharged waste gas is ensured to meet the environmental protection requirement.
Based on a general inventive concept, the present invention also provides a method for using a cooling device, comprising the steps of:
(1) the high-temperature powdery material enters the cooling bin under the action of gravity, and the high-temperature powdery material exchanges heat with cooling water in the cooling water jacket in the falling process;
(2) enabling the high-temperature powdery material which is preliminarily cooled in the step (1) to enter a spiral cooler from a cooling bin under the action of gravity, enabling the high-temperature powdery material to exchange heat with cooling water in a spiral cooling water jacket under the action of turning and pushing of a spiral reamer, further reducing the temperature of the high-temperature powdery material, and pushing the high-temperature powdery material out of the spiral cooler under the action of the spiral reamer;
(3) and (3) leading the high-temperature powdery material which is further cooled after the step (2) to enter the stirring barrel under the drainage of cooling water of the stirring barrel, further reducing the temperature of the high-temperature powdery material under the action of the cooling water, and enabling the high-temperature powdery material to flow out of the stirring barrel after the requirement of the treatment temperature of subsequent operation is met.
Preferably, in the step (1), the high-temperature powdery material is subjected to heat exchange with cooling water in the heat exchange tube and the cooling water jacket in the falling process, and hot water and/or water vapor obtained through the heat exchange are/is connected with an external waste heat utilization system through a pipeline for waste heat utilization; in the step (2), the hot water obtained by heat exchange is connected with an external waste heat utilization system through a pipeline for waste heat utilization; in the step (3), the high-temperature powdery material flows out from a cooled ore pulp outlet of the stirring barrel after the temperature of the high-temperature powdery material meets the requirement of the treatment temperature of the subsequent operation, dust-containing smoke generated in the process is collected in a chimney of the stirring barrel, and high-altitude emission is carried out after the dust content is ensured to reach the standard.
The technical scheme of the invention not only can effectively cool the high-temperature powdery material, but also has a production scheme of two waste heat utilization products of hot water and steam according to different cooling starting temperatures of the high-temperature material, and can economically and reasonably utilize a large amount of sensible heat carried by the high-temperature powdery material.
Compared with the prior art, the invention has the advantages that:
1. the cooling device disclosed by the invention can effectively cool the high-temperature powdery material and can recover the waste heat for effective utilization, the direct liquid-solid heat exchange and the indirect heat exchange are combined, the heat exchange efficiency is high, the operation cost and the equipment cost are low, the operation is stable, the energy is saved, the environment is protected, the adaptability is strong, and the cooling device has important significance for cooling and waste heat utilization of the high-temperature powdery material.
2. The cooling device can adopt two waste heat utilization schemes of hot water and hot water plus steam according to different cooling starting temperatures of high-temperature materials, and can economically and reasonably utilize a large amount of sensible heat carried by high-temperature powdery materials.
3. The cooling device of the invention fully utilizes gravity, relatively few moving parts are arranged in the system, the investment of system infrastructure is low, the operation is stable and the operation cost is low, and simultaneously the cooling time of the material can be reasonably regulated and controlled by regulating the rotating speed of the spiral cooler, thereby ensuring the cooling effect.
4. The cooling device is characterized in that the spraying ejector is fixedly arranged in the stirring barrel, the spraying ejector ensures that the powdery material forcibly conveyed by the spiral cooler can smoothly enter the stirring barrel, so that the whole cooling and waste heat utilization system can continuously and stably operate, the chimney is fixedly arranged at the top of the stirring barrel, the problem of environmental pollution of discharged waste gas is avoided on the premise of reducing the gas pressure in the stirring barrel so as to ensure the smooth operation of the material, and the operation process of the system is green and environment-friendly.
5. The using method of the invention has the advantages of simple operation, low operation cost, easy maintenance and green and environment-friendly using process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a cooling apparatus in example 1 of the present invention.
FIG. 2 is a schematic view of a cooling apparatus in example 2 of the present invention.
1. 1-1 parts of cooling bin, 1-2 parts of bin cooling water outlet, 1-3 parts of bin cooling water jacket, 1-4 parts of heat exchange tube, 1-5 parts of bin cooling water inlet, 1-6 parts of heat exchange tube cooling water inlet and 1-6 parts of heat exchange tube steam outlet; 2. 2-1 of a spiral cooler, 2-2 of a spiral reamer, 2-2 of a spiral cooling water inlet, 2-3 of a spiral cooling water outlet, 2-4 of a spiral cooling water jacket; 3. 3-1 parts of a stirring barrel, 3-2 parts of a chimney cooling water nozzle, 3-3 parts of a cooling water nozzle, 3-4 parts of a jet ejector nozzle, 3-5 parts of a cooling water nozzle, 3-6 parts of a cooling slurry outlet.
Detailed Description
In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing method.
Example 1:
a cooling device for high-temperature powdery materials is shown in figure 1 and comprises a cooling bin 1, a spiral cooler 2, a stirring barrel 3, an attached connecting pipeline, a valve and the like. The cooling feed bin 1 of this embodiment is installed under the export of fine ore high temperature preprocessing device material stream, and is linked to each other through high temperature resistant pipeline and fine ore high temperature preprocessing material egress opening, and 1 discharge gate of cooling feed bin links to each other with 2 feed inlets of spiral cooler through high temperature resistant pipeline, and 2 discharge gates of spiral cooler link to each other with 3 feed inlets of agitator, and 3-6 of cooling ore pulp exports through pipeline and continuous with the subsequent processing process.
The outer wall of a cooling bin 1 of the embodiment is provided with a bin cooling water jacket 1-2, the bin cooling water jacket 1-2 is provided with a bin cooling water inlet 1-4 and a bin cooling water outlet 1-1, the bin cooling water inlet 1-4 is connected with an external high-level water pool through a pipeline, and the bin cooling water outlet 1-1 is connected with an external waste heat utilization system through a high-temperature-resistant pipeline. The cooling bin 1 is internally provided with heat exchange tubes 1-3, the heat exchange tubes 1-3 penetrate through the cooling bin 1 and the bin cooling water jacket 1-2, the outer wall of the bin cooling water jacket 1-2 is provided with heat exchange tube cooling water inlets 1-5 and heat exchange tube steam outlets 1-6, the heat exchange tube cooling water inlets 1-5 are connected with an external high-level water tank through pipelines, and the heat exchange tube steam outlets 1-6 are connected with an external steam utilization system through high-temperature-resistant pipelines.
The spiral cooler 2 of this embodiment sets firmly under cooling feed bin 1, and 2 feed inlets of spiral cooler link to each other with 1 discharge gates of cooling feed bin through high temperature resistant pipeline, and the inside of spiral cooler 2 is equipped with spiral reamer 2-1. The outer wall of the spiral cooling machine 2 is provided with a spiral cooling water jacket 2-4, the outer wall of the spiral cooling water jacket 2-4 is provided with a spiral cooling water inlet 2-2 and a spiral cooling water outlet 2-3, the spiral cooling water inlet 2-2 is connected with an external high-level water tank through a pipeline, and the spiral cooling water outlet 2-3 is connected with an external waste heat utilization system through a high-temperature-resistant pipeline.
A jet ejector nozzle 3-4 and a plurality of cooling water nozzles 3-3 and 3-5 are fixedly arranged near a feed inlet of a stirring barrel 3 in the embodiment, the plurality of cooling water nozzles 3-3 and 3-5 are distributed in the stirring barrel 3 in the vertical opposite direction, the jet ejector nozzle 3-4 is connected with an external pump through a pipeline, and the plurality of cooling water nozzles 3-4 and 3-5 are connected with an external high-level water tank through a pipeline; the top of the stirring barrel 3 is provided with a chimney 3-1, the outer wall of the chimney 3-1 is fixedly provided with a chimney cooling water nozzle 3-2, and the chimney cooling water nozzle 3-2 is connected with an external high-level water tank through a pipeline.
The use method of the cooling device of the embodiment comprises the following steps:
(1) cooling water is fed from a bin cooling water inlet 1-4 to enable the cooling water to fill a bin cooling water jacket 1-2, meanwhile, cooling water is fed from a heat exchange pipe cooling water inlet 1-5 to enable the cooling water to fill a heat exchange pipe 1-3, then high-temperature powdery materials enter the cooling bin 1 from a material flow outlet of a fine ore high-temperature pretreatment device under the action of gravity, the high-temperature powdery materials are subjected to heat exchange with the cooling water in the heat exchange pipe 1-3 and the bin cooling water jacket 1-2 in the falling process, and obtained hot water and water vapor are connected with an external waste heat utilization system through pipelines of a bin cooling water outlet 1-1 and a heat exchange pipe water vapor outlet 1-6 to perform waste heat utilization;
(2) cooling water is fed from a spiral cooling water inlet 2-2 to enable the cooling water to fill a spiral cooling water jacket 2-4, high-temperature powdery materials which are preliminarily cooled after the step (1) enter a spiral cooler 2 from a cooling bin 1 under the action of gravity, the spiral cooler 2 is started to enable the high-temperature powdery materials to exchange heat with the cooling water in the spiral cooling water jacket 2-4 under the turning and pushing action of a spiral reamer 2-1, the obtained hot water is connected with an external waste heat utilization system through a pipeline of a spiral cooling water outlet 2-3 to be used for waste heat utilization, meanwhile, the temperature of the high-temperature powdery materials is further reduced, and the high-temperature powdery materials are pushed out of the spiral cooler 2 under the action of the spiral reamer 2-1;
(3) cooling water flows into the stirring barrel 3 from a nozzle 3-4 of the jet ejector and a plurality of cooling water nozzles 3-3 and 3-5, then high-temperature powdery materials which are further cooled in the step (2) enter the stirring barrel 3 under the drainage of the cooling water of the nozzle 3-4 of the jet ejector and the cooling water nozzles 3-3 and 3-5 and are stirred in the stirring barrel, the temperature of the high-temperature powdery materials is further reduced under the action of the cooling water and the stirring, the high-temperature powdery materials flow out from a cooling ore pulp outlet 3-6 of the stirring barrel 3 after the temperature of the high-temperature powdery materials meets the temperature requirement of subsequent operation treatment, dust-containing smoke generated in the process is collected in a chimney 3-1, the cooling water nozzles 3-2 arranged in the chimney can flow in the cooling water, so that the discharged waste gas can meet the environmental protection requirement while the gas pressure in the stirring barrel is reduced, and then the waste gas reaching the standard is discharged at high altitude.
The high-temperature powdery material to be cooled in this embodiment is a roasted ore obtained by reduction roasting of manganese oxide ore, and the original temperature of the roasted ore is 750 ℃ to 800 ℃. After being cooled by the cooling bin 1, the temperature of the roasted ore is reduced to 400-450 ℃, and a water vapor byproduct with the temperature of more than or equal to 120 ℃ and hot water with the temperature of 90-95 ℃ are obtained at the same time; the roasted ore further enters a spiral cooler 2 to be cooled, the temperature is reduced to 150-200 ℃, and hot water with the temperature of 80-90 ℃ is obtained at the same time; finally, the roasted ore enters a stirring barrel 3 to be further cooled to 80-90 ℃ ore pulp, and after size mixing, the subsequent leaching operation is carried out to complete the whole cooling process of the high-temperature fine ore.
Example 2:
a cooling device for high-temperature powdery materials is shown in figure 1 and comprises a cooling bin 1, a spiral cooler 2, a stirring barrel 3, an attached connecting pipeline, a valve and the like. The cooling feed bin 1 of this embodiment is installed under the export of fine ore high temperature preprocessing device material stream, and is linked to each other through high temperature resistant pipeline and fine ore high temperature preprocessing material egress opening, and 1 discharge gate of cooling feed bin links to each other with 2 feed inlets of spiral cooler through high temperature resistant pipeline, and 2 discharge gates of spiral cooler link to each other with 3 feed inlets of agitator, and 3-6 of cooling ore pulp exports through pipeline and continuous with the subsequent processing process.
The outer wall of a cooling bin 1 of the embodiment is provided with a bin cooling water jacket 1-2, the bin cooling water jacket 1-2 is provided with a bin cooling water inlet 1-4 and a bin cooling water outlet 1-1, the bin cooling water inlet 1-4 is connected with an external high-level water pool through a pipeline, and the bin cooling water outlet 1-1 is connected with an external waste heat utilization system through a high-temperature-resistant pipeline. The cooling bin is internally provided with heat exchange tubes 1-3, the heat exchange tubes 1-3 penetrate through the cooling bin 1 and are connected with the inner cavity of the cooling water jacket 1-2 of the bin, and heat generated by the heat exchange tubes 1-3 through heat exchange is transferred through water in the cooling water jacket 1-2 of the bin.
The spiral cooler 2 of this embodiment sets firmly under cooling feed bin 1, and 2 feed inlets of spiral cooler link to each other with 1 discharge gates of cooling feed bin through high temperature resistant pipeline, and the inside of spiral cooler 2 is equipped with spiral reamer 2-1. The outer wall of the spiral cooling machine 2 is provided with a spiral cooling water jacket 2-4, the outer wall of the spiral cooling water jacket 2-4 is provided with a spiral cooling water inlet 2-2 and a spiral cooling water outlet 2-3, the spiral cooling water inlet 2-2 is connected with an external high-level water tank through a pipeline, and the spiral cooling water outlet 2-3 is connected with an external waste heat utilization system through a high-temperature-resistant pipeline.
A jet ejector nozzle 3-4 and a plurality of cooling water nozzles 3-4 and 3-5 are fixedly arranged near a feed inlet of a stirring barrel 3 in the embodiment, the plurality of cooling water nozzles 3-4 and 3-5 are distributed in the stirring barrel 3 in the vertical opposite direction, the jet ejector nozzle 3-4 is connected with an external pump through a pipeline, and the plurality of cooling water nozzles 3-4 and 3-5 are connected with an external high-level water tank through a pipeline; the top of the stirring barrel 3 is provided with a chimney 3-1, the outer wall of the chimney 3-1 is fixedly provided with a chimney cooling water nozzle 3-2, and the chimney cooling water nozzle 3-2 is connected with an external high-level water tank through a pipeline.
The use method of the cooling device of the embodiment comprises the following steps:
(1) cooling water is fed from a bin cooling water inlet 1-4 to enable the cooling water to fill a bin cooling water jacket 1-2 and a heat exchange pipe 1-3, then high-temperature powdery materials enter the cooling bin 1 from a material flow outlet of a fine ore high-temperature pretreatment device under the action of gravity, the high-temperature powdery materials are subjected to heat exchange with the cooling water in the heat exchange pipe 1-3 and the bin cooling water jacket 1-2 in the falling process, and the obtained hot water is connected with an external waste heat utilization system through a pipeline of the bin cooling water outlet 1-1 to perform waste heat utilization;
(2) cooling water is fed from a spiral cooling water inlet 2-2 to enable the cooling water to fill a spiral cooling water jacket 2-4, high-temperature powdery materials which are preliminarily cooled after the step (1) enter a spiral cooler 2 from a cooling bin 1 under the action of gravity, the spiral cooler 2 is started to enable the high-temperature powdery materials to exchange heat with the cooling water in the spiral cooling water jacket 2-4 under the turning and pushing action of a spiral reamer 2-1, the obtained hot water is connected with an external waste heat utilization system through a pipeline of a spiral cooling water outlet 2-3 to be used for waste heat utilization, meanwhile, the temperature of the high-temperature powdery materials is further reduced, and the high-temperature powdery materials are pushed out of the spiral cooler 2 under the action of the spiral reamer 2-1;
(3) cooling water flows into the stirring barrel 3 from a nozzle 3-4 of the jet ejector and a plurality of cooling water nozzles 3-3 and 3-5, then high-temperature powdery materials which are further cooled in the step (2) enter the stirring barrel 3 under the drainage of the cooling water of the nozzle 3-4 of the jet ejector and the cooling water nozzles 3-3 and 3-5 and are stirred in the stirring barrel, the temperature of the high-temperature powdery materials is further reduced under the action of the cooling water and the stirring, the high-temperature powdery materials flow out from a cooling ore pulp outlet 3-6 of the stirring barrel 3 after the temperature of the high-temperature powdery materials meets the temperature requirement of subsequent operation treatment, dust-containing smoke generated in the process is collected in a chimney 3-1, the cooling water nozzles 3-2 arranged in the chimney can flow in the cooling water, so that the discharged waste gas can meet the environmental protection requirement while the gas pressure in the stirring barrel is reduced, and then the waste gas reaching the standard is discharged at high altitude.
The material to be cooled in this example is a high-temperature roasted ore obtained by flash magnetizing and roasting certain gold smelting waste, and the grain size composition of the high-temperature roasted ore is shown in table 1.
Table 1: results of size screening of roasted ore and distribution of metal amount in each size fraction%
As is clear from the results of particle size analysis of the roasted ore shown in Table 1, the roasted ore contained 82.85% in a content of-0.075 mm and 48.77% in a content of-0.019 mm, and it is a powdery material having a fine particle size which is difficult to recover. The temperature of the roasted ore after flash magnetization roasting is 700-750 ℃, and when the high-temperature powdery material cooling and waste heat utilization method provided by the invention is adopted for treatment, the temperature of the roasted ore is reduced to 300-350 ℃ after being cooled by the cooling bin 1, and meanwhile, 80-90 ℃ hot water is obtained to be used as daily water for a roasting plant; then cooling the roasted ore in a spiral cooler 2, and further reducing the temperature of the roasted ore to 80-100 ℃; and finally, the mixture is injected by an injection injector and enters the stirring barrel 3 for further cooling to 30-40 ℃, and after size mixing, the mixture enters a subsequent multiple low-intensity magnetic separation process to finish the cooling process of the high-temperature powdery material.
In general, the cooling device disclosed by the invention can effectively cool high-temperature powdery materials and can recover waste heat for effective utilization, the direct liquid-solid heat exchange and the indirect heat exchange are combined, the heat exchange efficiency is high, the operation cost and the equipment cost are low, the operation is stable, the cooling device is energy-saving and environment-friendly, the adaptability is strong, and the cooling device has important significance for cooling the high-temperature powdery materials and utilizing the waste heat. The using method of the device is simple to operate, low in operation cost, easy to maintain and green and environment-friendly in the using process.
Claims (10)
1. A cooling device for high-temperature powdery materials is characterized in that: the cooling device comprises a cooling bin (1), a spiral cooler (2) and a stirring barrel (3), wherein a feed inlet of the spiral cooler (2) is connected with a discharge outlet at the bottom of the cooling bin (1); the discharge hole of the spiral cooler (2) is connected with the feed inlet of the stirring barrel (3); the outer wall of the cooling bin (1) is provided with a bin cooling water jacket (1-2), the outer wall of the spiral cooling machine (2) is provided with a spiral cooling water jacket (2-4), and the spiral reamer (2-1) is arranged inside the spiral cooling machine (2).
2. The cooling apparatus according to claim 1, wherein: the bin cooling water jacket (1-2) is provided with a bin cooling water inlet (1-4) and a bin cooling water outlet (1-1), the bin cooling water inlet (1-4) is connected with an external water pool through a pipeline, and the bin cooling water outlet (1-1) is connected with an external waste heat utilization system through a pipeline; and a heat exchange pipe (1-3) is arranged in the cooling bin (1).
3. The cooling apparatus according to claim 2, wherein: the heat exchange pipe (1-3) penetrates through the cooling bin (1) and is connected with an inner cavity of the bin cooling water jacket (1-2).
4. The cooling apparatus according to claim 2, wherein: the heat exchange tube (1-3) penetrates through the cooling bin (1) and the bin cooling water jacket (1-2), the outer wall of the bin cooling water jacket (1-2) is provided with a heat exchange tube cooling water inlet (1-5) and a heat exchange tube steam outlet (1-6), the heat exchange tube cooling water inlet (1-5) is connected with an external water pool through a pipeline, and the heat exchange tube steam outlet (1-6) is connected with an external steam utilization system through a pipeline.
5. The cooling apparatus according to claim 1, wherein: the cooling bin (1) is arranged below a discharge hole of the high-temperature powdery material pretreatment device, and a feed inlet of the cooling bin (1) is connected with the discharge hole of the high-temperature powdery material pretreatment device.
6. The cooling apparatus according to claim 1, wherein: the spiral cooling machine (2) is arranged below the cooling bin (1), a spiral cooling water inlet (2-2) and a spiral cooling water outlet (2-3) are formed in the outer wall of the spiral cooling water jacket (2-4), the spiral cooling water inlet (2-2) is connected with an external water pool through a pipeline, and the spiral cooling water outlet (2-3) is connected with an external waste heat utilization system through a pipeline.
7. The cooling device according to any one of claims 1 to 6, wherein: a jet ejector nozzle (3-4) and a plurality of cooling water nozzles (3-3, 3-5) are arranged near the feed inlet of the stirring barrel (3), the jet ejector nozzle (3-4) is connected with an external pump through a pipeline, and the cooling water nozzles (3-3, 3-5) are connected with an external water pool through pipelines; the stirring barrel (3) is connected with a treatment process of the high-temperature powdery material after being cooled through a cooling ore pulp outlet (3-6).
8. The cooling device according to any one of claims 1 to 7, wherein: a chimney (3-1) is arranged at the top of the stirring barrel (3), a chimney cooling water nozzle (3-2) is arranged on the chimney (3-1), and the chimney cooling water nozzle (3-2) is connected with an external water pool through a pipeline.
9. A method of using a cooling device as claimed in any one of claims 1 to 8, comprising the steps of:
(1) high-temperature powdery materials enter the cooling bin (1) under the action of gravity, and the high-temperature powdery materials exchange heat with cooling water in the cooling water jacket (1-2) of the bin in the falling process;
(2) enabling the high-temperature powdery material which is preliminarily cooled after the step (1) to enter the spiral cooler (2) from the cooling bin (1) under the action of gravity, enabling the high-temperature powdery material to exchange heat with cooling water in the spiral cooling water jacket (2-4) under the action of turning and pushing of the spiral reamer (2-1), further reducing the temperature of the high-temperature powdery material, and pushing the high-temperature powdery material out of the spiral cooler (2) under the action of the spiral reamer (2-1);
(3) and (3) leading the high-temperature powdery material which is further cooled after the step (2) to enter the stirring barrel (3) under the drainage of cooling water of the stirring barrel (3), further reducing the temperature of the high-temperature powdery material under the action of the cooling water, and enabling the high-temperature powdery material to flow out of the stirring barrel (3) after the temperature requirement of subsequent operation treatment is met.
10. Use according to claim 9, characterized in that: in the step (1), the high-temperature powdery material is subjected to heat exchange with the heat exchange tubes (1-3) and cooling water in the bin cooling water jacket (1-2) in the falling process, and hot water and/or water vapor obtained through the heat exchange are connected with an external waste heat utilization system through a pipeline for waste heat utilization; in the step (2), the hot water obtained by heat exchange is connected with an external waste heat utilization system through a pipeline for waste heat utilization; in the step (3), the high-temperature powdery material flows out from a cooling ore pulp outlet (3-6) of the stirring barrel (3) after the temperature of the high-temperature powdery material meets the requirement of the treatment temperature of the subsequent operation, dust-containing smoke generated in the process is collected in a chimney (3-1) of the stirring barrel (3), and the high-altitude emission is carried out after the dust content reaches the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010470065.8A CN111551053A (en) | 2020-05-28 | 2020-05-28 | Cooling device for high-temperature powdery material and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010470065.8A CN111551053A (en) | 2020-05-28 | 2020-05-28 | Cooling device for high-temperature powdery material and using method thereof |
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| CN111551053A true CN111551053A (en) | 2020-08-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115946223A (en) * | 2022-12-09 | 2023-04-11 | 北新建材(苏州)有限公司 | Reamer conveyor |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115946223A (en) * | 2022-12-09 | 2023-04-11 | 北新建材(苏州)有限公司 | Reamer conveyor |
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