CN216191916U - System for utilize gasification sediment preparation low unit weight rock wool - Google Patents
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Abstract
The utility model discloses a system for preparing low-volume-weight rock wool by using gasified slag, which comprises a melting module, an adjusting module and a forming and post-processing module which are sequentially connected; the forming and post-processing module is a glass cotton forming and post-processing module and comprises a centrifugal fiber forming system, a cotton collecting system, a solidifying system and a post-processing system which are sequentially connected according to the trend of a melt. The system combines the plasma high-temperature melting furnace, the tank furnace, the material channel and the glass wool forming and post-processing module, solves the problem that the existing rock wool production system can not produce rock wool with low volume weight, and produces rock wool with volume weightNot higher than 36Kg/m3。
Description
Technical Field
The utility model relates to the technical field of rock wool material preparation systems, in particular to a system for preparing low-volume-weight rock wool by utilizing gasified slag.
Background
Rock woolBasalt is used as a main raw material, and the thermal insulation material is prepared through the working procedures of high-temperature melting, centrifugal molding, solidification and shaping and the like, and plays an important role in thermal insulation in the fields of buildings, industrial pipelines, storage tanks, ships and the like. The volume weight of the prior rock wool products such as rock wool boards, rock wool felts and the like is generally 180Kg/m3. Rock wool with large volume weight means that the weight of the heat insulation layer per unit volume is large, and the application of the rock wool is limited in products and occasions with strict requirements on the weight of the heat insulation layer, such as ships, vehicles and the like.
At present, the volume weight is lower than 40Kg/m3The preparation of rock wool is blank in China. Therefore, a system was developed for preparing rock wool with a light weight per unit volume, namely: a preparation system of low volume weight rock wool is an urgent need in the art. The prepared low volume weight rock wool has light weight per unit volume, and can be widely applied to the fields of ships, vehicles and the like with high requirements on the weight and the fireproof performance of heat-insulating materials.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a system for preparing low-volume-weight rock wool by utilizing gasified slag, aiming at the technical defects in the prior art. The system takes the gasified slag as a main raw material, after the gasified slag is tempered, the raw material is heated in a convection mode and melted by using a plasma high-temperature melting furnace, the melt is stored, kept warm, clarified and homogenized by combining a tank furnace, the temperature and the viscosity of the melt are accurately adjusted by combining a material channel, and the melt is formed and post-treated by combining a glass wool forming and post-treatment module, so that the low-volume-weight rock wool which meets the standard and has stable quality is prepared, and the gasified slag can be changed into things of value.
This utilize system of low unit weight rock wool of gasification sediment preparation, including connecting gradually:
the melting module is used for melting the coal gasification slag and the modifying agent to form a molten mass;
the adjusting module is used for accumulating, preserving heat, clarifying and homogenizing the melt, and adjusting the temperature and the viscosity of the melt to form a melt; and
the forming and post-processing module for forming and post-processing the melt is a forming and post-processing module for glass wool and comprises a centrifugal fiber forming system, a cotton collecting system, a solidifying system and a post-processing system which are sequentially connected according to the trend of the melt.
The melting module comprises a plasma high-temperature melting furnace, a plasma gun system consisting of a plurality of direct-current transferred arc or non-transferred arc plasma guns is arranged at the top of a furnace body of the plasma high-temperature melting furnace, and a powder input nozzle for simultaneously introducing coal gasification slag and a hardening and tempering agent is arranged in the middle of the furnace body.
The adjusting module comprises a tank furnace, a throat and a material channel which are connected in sequence and used for storing, preserving heat, clarifying and homogenizing the melt from the plasma high-temperature melting furnace according to the trend of the melt, and accurately adjusting the temperature and the viscosity of the melt.
The tank kiln comprises a tank body and a kiln body, wherein an inlet of the tank body is communicated with a fused mass discharge port at the lower part of the plasma high-temperature melting furnace, and an outlet of the tank body is communicated with the material channel through a throat.
The tail end of the material channel is provided with an adjusting area for accurately adjusting temperature and viscosity of the molten mass, and combustion burners are arranged on the inner wall of the adjusting area at intervals and face the direction of the molten mass; the bottom of the material channel of the adjusting area is provided with 2-4 bushing plates, and each bushing plate is provided with a liquid flowing hole which discharges melt with suitable temperature and viscosity for forming to the forming and post-processing module at a quantitative and uniform rate.
The melting module also comprises a tempering agent input device, wherein the tempering agent input device is filled with a tempering agent, and a tempering agent outlet of the tempering agent input device is connected with a powder input nozzle arranged on the plasma high-temperature melting furnace body.
The melting module also comprises an oxygen-enriched preparation device which is connected with an oxygen-enriched air input nozzle which is arranged in the middle of the furnace body and used for introducing oxygen-enriched air; the powder input nozzle and the oxygen-enriched gas input nozzle are converged outside the furnace body to form a total feeding nozzle, and the total feeding nozzle is communicated with the furnace body.
The melting module is also provided with a drying system and a solid waste conveying device, wherein the drying system is used for receiving and drying original coal gasification slag waste materials and the solid waste conveying device is used for conveying dried coal gasification slag; the discharge end of the solid waste conveying device is connected with the powder input nozzle.
The drying system comprises a feeding end, a discharging end, an air inlet end and an air exhaust end; the discharge end is connected with a powder solid waste bin of the solid waste conveying device; the gas inlet end is connected with a high-temperature gas discharge port which is arranged at the upper part of the plasma high-temperature melting furnace and is used for discharging high-temperature gas generated by combustion, so that the high-temperature gas can be used as a drying heat source and introduced into a drying system; the exhaust end is divided into three paths, the first path is directly connected with the plasma high-temperature melting furnace through a first circulating fan, the second path is connected with a conveying pump of the solid waste conveying device through a second circulating fan, and the third path is connected with a tail gas treatment system.
The solid waste conveying device is a pneumatic powder conveying system and comprises a powder solid waste bin for receiving and storing dried gasified slag and a conveying pump for conveying the powder solid waste bin to a powder input nozzle; the feed end of the conveying pump is connected with the powder solid waste bin, and the air inlet end of the conveying pump is connected with the air outlet end of the drying system.
Compared with the prior art, the utility model provides a system for preparing low-volume-weight rock wool by using gasified slag, and the volume weight of the prepared rock wool is not higher than 36Kg/m3. When the system of the utility model uses the plasma high-temperature melting furnace to melt the gasified slag, combustible substances in the gasified slag can be combusted, and energy generated by combustion is directly used for melting raw materials, thus not only reducing the energy consumption of the system; the system melts the coal gasification slag and the modifying agent by using a convection heating mode of a plasma high-temperature melting furnace to obtain a molten mass with stable contents of all components, and also ensures that the prepared low-volume-weight rock wool has stable quality; high-temperature gas and the like generated by combustion can be recycled to the drying system and the solid waste conveying device to further reduce the energy consumption of the system; and equipment such as oxygen-enriched air combustion-supporting and plasma auxiliary energy supplementing are additionally arranged in the system, so that the atmosphere of the plasma high-temperature melting furnace in the heating and melting process is controllable, and the generation of nitrogen oxides is reduced.
The system of the utility model uses the tank furnace to store, preserve heat, clarify and homogenize the melt, can realize the mass production of the low volume weight rock wool, and the annual production scale can reach 0.5-2 ten thousand tons. Meanwhile, the system uses the material channel to accurately adjust the temperature and viscosity of the molten mass, so that the system is suitable for the subsequent forming process.
The system of the utility model introduces a molding and post-processing module in a glass wool production system, and molds and post-processes the melt by using the module, thereby finally producing the low-volume-weight rock wool.
The system combines the plasma high-temperature melting furnace, the tank furnace, the material channel and the glass wool forming and post-processing module, and not only produces the glass wool with the volume weight not higher than 36Kg/m3The low volume weight rock wool also realizes the aims of large-scale production of the low volume weight rock wool, stable chemical composition of the molten mass and accurate adjustment of the temperature and viscosity of the molten mass. The low volume weight rock wool produced by the system has great application value in the fields of ships, vehicles and the like with high requirements on the weight and the fireproof performance of the heat-insulating material.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
in the figure: 1-plasma high-temperature melting furnace, 1-1: high-temperature gas discharge port, 1-2: powder input nozzle, 1-3: oxygen-enriched gas input nozzle, 1-4: a furnace body; 2-a drying system; 3-solid waste conveying device, 3-1: powder solid waste bin, 3-2: a delivery pump; 4-tank furnace; 5-fluid hole; 6-material channel; 7-a fiber-forming system; 8-natural gas combustion system; 9-a cotton harvesting system; 10-a curing system; 11-a post-treatment system; 12-an oxygen-enriched preparation device; 13-a plasma gun system; 14-a first circulation fan; 15-second circulating fan.
Detailed Description
Although the applicant has disclosed a system for producing industrial rock wool from gasified slag in patent application CN109108042A, the system in the patent application produces the industrial rock wool with a volume weight of 50-200Kg/m3And the requirement of the current market on the low volume weight of rock wool cannot be met. That is, the production system of current rock wool can not prepare low unit weight rock wool.
Rockwool belongs to one category of rock fibers, and is a material formed by fiberizing molten rock into a cotton-like shape, and chemical components of the rockwool belong to the class of rocks. Glass wool belongs to a category of glass fibers, and is a material formed by fiberizing molten glass into wool-like fibers, and the chemical components thereof belong to the category of glasses. Because rock wool and glass cotton belong to two kinds of fibre of complete different grade type, therefore traditional rock wool system and glass cotton production system belong to the production system of complete different grade type, especially founding module and shaping and aftertreatment module in the production system, founding mechanism, the shaping mechanism are completely different and can not mutually use, promptly: rock melt obtained by the rock wool melting system cannot obtain qualified fiber products when being used in a fiber forming system of glass wool, and glass melt obtained by the glass wool melting system cannot obtain qualified fiber products when being used in a fiber forming system of rock wool.
The utility model relates to a method for preparing low-volume-weight rock wool, which comprises the steps of exploring and boldly trying, taking gasified slag as a main raw material for preparing low-volume-weight rock wool, adding a modifier into the gasified slag to modify the gasified slag, heating and melting the raw materials (the raw materials consist of the gasified slag and the modifier) in a plasma high-temperature melting furnace through convection to form a molten mass, accumulating, preserving heat, clarifying and homogenizing the molten mass in a tank furnace, accurately adjusting the temperature and viscosity of the molten mass in a material channel, and obtaining a molten mass with the temperature and viscosity meeting the requirements of a forming and post-processing module of glass wool.
The utility model applies the existing glass wool forming and post-processing module to the preparation of low volume weight rock wool in a breakthrough way, and the melt is formed and post-processed by the glass wool forming and post-processing module, namely: firstly, forming a melt by using a fiber forming system in a glass wool production system according to a forming procedure of glass wool to obtain low-volume-weight rock wool fibers; then the low volume weight rock wool fiber is processed by a cotton collecting system, a curing system, a post-processing system of surface grinding, veneering, curling, packaging and the like in a glass wool production system to obtain the low volume weight rock wool fiber with the volume weight not higher than 36Kg/m3The low volume weight rock wool (the chemical composition of the low volume weight rock wool raw material is slightly different from that of the conventional rock wool raw material, so the low volume weight rock wool is also called as 'rock wool').
The system combines the plasma high-temperature melting furnace, the tank furnace and the material channel to be used for melting the raw materials of the low-volume-weight rock wool, then combines the glass wool forming and post-processing module to be used for forming and post-processing the melt, and enables the glass wool forming and post-processing module to be used for preparing the low-volume-weight rock wool through the integration and adjustment module between the two modules.
The utility model uses the gasified slag to replace basalt ore as the raw material of the low-volume-weight rock wool. The gasified slag (also called gasified slag) is the incomplete combustion (CO and H are generated) of coal and oxygen or oxygen-enriched air in a gasification furnace2The synthesis gas of (a), inorganic minerals in the coal undergo physicochemical transformation, and solid residues formed along with carbon particles remaining in the coal, whose main components are silica, alumina, calcium oxide and carbon residue, are relatively stable in chemical properties and composition. At present, the gasified slag is mainly stockpiled and buried, large-scale industrial resource comprehensive application is not performed, serious environmental pollution and land resource waste are caused, the sustainable development of coal chemical enterprises is adversely affected, and the treatment of the gasified slag is urgent.
The utility model provides a system for preparing low-volume-weight rock wool by using gasified slag, and the volume weight of the prepared rock wool is not higher than 36Kg/m3And is therefore called "low volume weight rockwool". The system comprises a melting module, an adjusting module and a forming and post-processing module which are connected in sequence according to the sequence of the working procedures as shown in figure 1. Wherein the content of the first and second substances,
the melting module takes the gasified slag as a main raw material, a modifier is added to modify the gasified slag to form a solid raw material, and the melting module heats and melts the solid raw material (or melts the gasified slag firstly, then adds the modifier and then continues to heat and melt the modifier) to form a melt with stable chemical composition. According to the trend of raw materials, the melting module comprises a drying system 2, a solid waste conveying device 3 and a plasma high-temperature melting furnace 1 which are sequentially connected.
The plasma high-temperature melting furnace 1 is used as main equipment in the whole melting module, is used for heating and melting (by adopting a convection heating mode) coal gasification slag and a hardening and tempering agent, and hardening and tempering the coal gasification slag, and comprises a furnace body 1-4, wherein the furnace body 1-4 consists of a refractory material lining and an interlayer water-cooling carbon steel shell, and the lining can resist temperature of 1500-DEG C and 1700 ℃. The top of the furnace body 1-4 is provided with a plasma gun system 13, and the plasma gun system 13 consists of a plurality of direct current transferred arc or non-transferred arc plasma guns. High-temperature gas generated by each plasma gun is sprayed into the furnace for providing energy. Because the raw materials introduced into the plasma high-temperature melting furnace 1 are mainly gasified slag and contain combustible materials, if the content of the combustible materials in the gasified slag is high or the temperature in the plasma high-temperature melting furnace 1 is overhigh (namely when the combustible materials in the gasified slag can be combusted to generate enough energy to melt the raw materials), the plasma gun system 13 can be intermittently used or not used. The middle part of the furnace body 1-4 is provided with a powder input nozzle 1-2 and an oxygen-enriched air input nozzle 1-3 which are respectively used for introducing coal gasification slag powder and oxygen-enriched air; the powder input nozzle 1-2 and the oxygen-enriched gas input nozzle 1-3 can be respectively arranged at different positions in the middle of the furnace body, or can be communicated with the furnace body after being converged into a total feed nozzle outside the furnace body. The oxygen-enriched air input nozzle 1-3 is connected with the oxygen-enriched preparation device 12 and is used for inputting oxygen-enriched air into the furnace body 1-4 to support combustion of combustible materials in the furnace body 1-4. The oxygen-enriched preparation device 12 is an industrial PSA (Pressure Swing Adsorption) oxygen-enriched production device, and can provide oxygen-enriched air with an oxygen content of 95%. The upper part of the furnace body 1-4 is provided with a high-temperature gas discharge port 1-1 for discharging high-temperature gas generated by combustion. The lower part of the furnace body 1-4 is provided with a melt outlet which is connected with the adjusting module and is used for guiding the melt into the adjusting module.
The melting module can also comprise a tempering agent input device, wherein the tempering agent input device is filled with a tempering agent, and a tempering agent outlet of the tempering agent input device is connected with the powder input nozzles 1-4 on the furnace bodies 1-4. The modifier input device can be arranged on a pipeline behind a powder solid waste bin 3-1 (described later) or a delivery pump 3-2 (described later). When the chemical composition of the chemical components in the gasified slag does not accord with the chemical composition of the low volume weight rock wool, the modifying agent is added into the gasified slag powder, the mixture is uniformly mixed and then added into the furnace body 1-4 through the powder input nozzle 1-2, namely the modifying agent and the gasified slag powder are jointly used as raw materials and are fed into the furnace body 1-4 through the powder input nozzle 1-2. Combustible substances in the gasified slag powder in the furnace body are combusted, flame generated by combustion directly contacts with the conditioning agent and the non-combustible substances in the gasified slag powder, the conditioning agent and the non-combustible substances in the gasified slag powder are heated (the heating mode is strong convection heating) to be melted to form a molten mass, and the chemical composition in the molten mass meets the preparation requirement of the low-volume-weight rock wool.
The drying system 2 is located in front of the plasma high-temperature melting furnace 1 along the raw material direction, and is used for receiving raw coal gasification slag waste (which is often high in water content and is also called wet-based gasification slag) and drying the coal gasification slag waste into coal gasification slag powder. The drying system 2 is an airflow drying or roller drying device and comprises an air inlet end, an air outlet end and a material outlet end. The air inlet end of the drying system 2 is connected with a high-temperature gas discharge port 1-1 of the plasma high-temperature melting furnace 1 through a high-temperature gas pipeline, high-temperature gas generated by the plasma high-temperature melting furnace 1 is introduced into the drying system 2 to serve as a drying heat source, if the temperature of the high-temperature gas is too high (about 1700 ℃), a heat exchanger can be installed on the high-temperature gas pipeline, and the temperature of air flow entering the drying system 2 is adjusted (the temperature of the high-temperature gas is reduced to about 800 ℃) and then enters the drying system 2). The exhaust end of the drying system 2 exhausts the fumes and water vapor out of the drying system 2. The exhaust end is divided into three pipelines connected in parallel, and gas exhausted from the first pipeline is introduced into the plasma high-temperature melting furnace 1 from the top through the first circulating fan 14 and is used for adjusting the atmosphere (weak reducing atmosphere) of the plasma high-temperature melting furnace 1; the gas discharged from the second pipeline enters a delivery pump 3-2 of a solid waste delivery device 3 (described later) through a second circulating fan 15 and is used as carrier gas for delivering materials; the gas discharged from the first pipeline and the second pipeline is recycled in the system, and the gas discharged from the third pipeline is treated by a tail gas treatment system (not shown in the figure) and then discharged into the atmosphere. The discharge end of the drying system 2 is connected with the solid waste conveying device 3, and the dried coal gasification slag powder is sent into a powder solid waste bin 3-1 of the solid waste conveying device 3.
The solid waste conveying device 3 is positioned behind the drying system 2 and in front of the powder input nozzle 1-2 of the plasma high-temperature melting furnace 1 along the moving direction of the coal gasification slag powder, and is used for conveying the coal gasification slag powder obtained by drying the drying system 2 into the furnace body 1-4 of the plasma high-temperature melting furnace 1. The solid waste conveying device 3 is a pneumatic powder conveying system and comprises a powder solid waste bin 3-1 for receiving and storing dried powder and a conveying pump 3-2 for conveying the powder to a powder input nozzle 1-2. The powder solid waste bin 3-1 is connected with the discharge end of the drying system 2, the feed end of the delivery pump 3-2 is connected with the discharge port of the powder solid waste bin 3-1, the gas inlet end is connected with the exhaust end of the second circulating fan 15 in the drying system 2, the discharge end is connected with the powder input nozzle 1-2 of the furnace body, and the delivery pump 3-2 takes the gas discharged from the second path of the exhaust end of the drying system 2 as the carrier gas to deliver the dry coal gasification slag powder stored in the powder solid waste bin 3-1 to the powder input nozzle 1-2 of the plasma high-temperature melting furnace 1 and then to enter the furnace body 1-4.
The adjusting module comprises a tank furnace 4, a throat 5 and a material channel 6 which are connected in sequence according to the trend of the molten mass.
The tank furnace 4 is used for storing molten mass and performing heat preservation, clarification and homogenization on the molten mass, so that bubbles in the molten mass are released, the components are uniformly mixed, and the temperature distribution of each part is uniform (namely, homogenization and temperature equalization). The tank furnace 4 is built by refractory materials, and is externally wrapped by heat-insulating materials and can resist the temperature of 1700 ℃; the device comprises a tank body and a kiln body, wherein the tank kiln is upwards opened and is suitable for storing a certain amount of molten mass, the tank body is communicated with a molten mass discharge port of a plasma high-temperature melting furnace 1, and the tank body receives the molten mass and stores, keeps warm, clarifies and homogenizes the molten mass. The kiln body is provided with a burner for maintaining the temperature of the molten mass in the tank.
A throat 5 is provided at the bottom of the downstream of the furnace 4 (upstream in the inflow direction of the melt and downstream in the outflow direction of the melt), and the homogenized and homogenized melt is discharged from the furnace 4 through the throat 5. The throat 5 is built by high-quality refractory materials, and has strong erosion resistance to high-temperature melts. The throat 5 communicates with the material passage 6 and discharges the high-temperature melt into the material passage 6.
The material channel 6 is built by refractory materials, and the exterior is wrapped by heat insulation materials. The upper stream of the material channel 6 is a temperature adjusting area, combustion burners or electric heaters are arranged on the inner wall at intervals, the combustion burners face to the direction of the molten mass and can spray flame, the temperature and the viscosity of the molten mass are accurately adjusted, and the molten mass with the temperature and the viscosity suitable for forming is obtained; 2-4 drain plates are arranged in parallel at the downstream of the material channel 6, and each drain plate is provided with a liquid flowing hole for quantitatively and uniformly discharging melt with proper temperature and viscosity for molding into a molding and post-processing module at a speed of 0.14Kg/s-0.4 Kg/s. The bushing is made of platinum-rhodium alloy or other high-temperature-resistant alloys, and the temperature of the bushing is controlled by an electric heating automatic system.
The forming and post-processing module adopts a forming and post-processing module in the traditional glass wool production (comprising a forming system and a post-processing system used in the traditional glass wool production line, which are commercially available), and comprises a centrifugal fiber forming system 7, a natural gas combustion system 8, a cotton collecting system 9, a curing system 10 and a post-processing system 11 (which can be all purchased from Nanjing glass fiber research and design institute Co., Ltd.). The centrifugal fiber forming system 7 comprises a centrifugal machine, a centrifuge, an annular combustion chamber, a fuel gas supply system, an air blowing and drawing device, a cotton distribution device, a medium-frequency heating device, a binder spraying device and the like, and melts flowing in from the liquid flow holes of the nozzle plate are made into slender rock wool fibers with the diameter of less than 6 mu m. The natural gas combustion system 8 comprises a gas supply device, a combustion control device and the like, and provides fuel for the annular combustion chamber of the centrifugal fiber forming system 7, and the fuel is combusted in the annular combustion chamber to provide high-temperature gas flow required for fiber forming. The cotton collecting system 9 comprises a cotton collecting machine, a negative pressure system and the like, the slender rock wool fibers prepared by the centrifugal fiber forming system 7 are conveyed to the cotton collecting system 9 and are uniformly distributed in the cotton collecting machine, and the cotton collecting machine integrates the slender rock wool fibers into a rock wool felt. The curing system 10 comprises a curing furnace body, a conveying mechanism, a pressurizing mechanism, a hot air system and the like, and carries out heat treatment such as compaction, drying, curing and the like on the rock wool felt prepared by the cotton collecting system 9 according to the product specification and requirements. And the post-treatment system 11 is used for carrying out surface grinding, veneering, longitudinal cutting, transverse cutting, curling, packaging and other treatment processes on the rock wool felt subjected to heat treatment by the curing system 10, and finally obtaining the low-volume-weight rock wool.
The specific method for producing the low-volume-weight rock wool by using the system through gasification slag comprises the following steps:
putting wet-base gasified slag into a drying system 2, drying the gasified slag into gasified slag powder with the water content within 5 wt%, conveying the dried gasified slag powder to a powder solid waste bin 3-1 of a solid waste conveying device 3 for storage, and conveying the gasified slag powder serving as a main raw material composition into a plasma high-temperature melting through a powder input nozzle 1-2 under the driving of carrier gas of a conveying pump 3-2In the furnace 1, oxygen-enriched gas prepared by the oxygen-enriched preparation device 12 enters the plasma high-temperature melting furnace 1 through an oxygen-enriched gas input nozzle 1-3; if the chemical components of the gasified slag powder do not meet the chemical composition requirement of the low volume weight rock wool, the modifier and the gasified slag powder are mixed and then are conveyed into the plasma high-temperature melting furnace 1 through the powder input nozzle 1-2. Under the action of the high temperature provided by the plasma gun system 13 and the oxygen-enriched air provided by the oxygen-enriched preparation device 12, the combustible in the gasified slag powder is completely combusted, energy is released, and meanwhile, the non-combustible and other raw materials (namely, the modifying agent) in the gasified slag powder are melted to form a molten mass. The melt flows into the tank furnace 4 through a melt outlet, is accumulated in the tank furnace 4, is subjected to heat preservation, clarification and homogenization, and then slowly flows out from the throat 5 and enters the material channel 6. The high-temperature melt is accurately adjusted in temperature and viscosity under the action of a combustion burner or an electric heating device in the temperature adjusting area of the material channel 6, the forming temperature is 1100-1120 ℃, and the viscosity is 10(1.8-2.0)Pa · s or so (preferably 10)1.9Pa.s) flows into the molding and post-treatment module through the liquid flowing holes of the bushing plate, and because the temperature and the viscosity of the melt meet the molding requirements of the glass wool, the low-volume-weight rock wool can be produced according to the conventional molding and post-treatment procedures of the glass wool. The method specifically comprises the following steps: the centrifugal fiber forming system 7 makes the melt into slender rock wool fibers, and the slender rock wool fibers sequentially pass through a cotton collecting system 9 and a curing system 10 and then pass through post-treatment systems such as surface grinding, veneering, longitudinal cutting, transverse cutting, curling and packaging to produce low-volume-weight rock wool products.
In the method, high-temperature flue gas generated by a plasma high-temperature melting furnace 1 enters a drying system 2 through a high-temperature gas discharge port 1-1 to be used as a heat source required by drying. The gas discharged by the drying system 2 contains high-temperature smoke and water vapor, the first path of gas enters the plasma high-temperature melting furnace 1 through the first circulating fan 14 to adjust the atmosphere in the furnace, the second path of gas enters the conveying pump 3-2 of the solid waste conveying device 3 through the second circulating fan 15 to be used as carrier gas for conveying gasified slag, and the third path of gas is treated by the tail gas treatment system and then discharged into the atmosphere.
The system provided by the utility model utilizes the plasma high-temperature melting furnace to melt the quenched and tempered gasified slag, so that silicon oxide, aluminum oxide, calcium oxide, magnesium oxide and the like in the gasified slag are used as chemical compositions of the low-volume-weight rock wool, the gasified slag is changed into valuables, and the rock wool is recycled; and the carbon residue in the coal gasification slag is combusted in the plasma high-temperature melting furnace to provide a heat value for melting, so that the energy consumption in the melting process is reduced. Because the chemical composition in the gasified slag is relatively stable, the content of each component is kept stable after tempering, and the prepared low-volume-weight rock wool also has stable quality.
In the system, a large-size tank furnace is used as a place for accumulating, preserving heat, clarifying and homogenizing a molten mass, so that the molten mass is homogenized and equalized; the temperature and viscosity of the melt are further controlled and adjusted in the channel to obtain a melt. The obtained melt can be used for producing the low-volume-weight rock wool by utilizing a glass wool forming and post-treatment module (comprising a fiber forming system, a cotton collecting system, a solidifying system and a post-treatment system which are commonly used).
The system realizes the molding of the low-volume-weight rock wool by utilizing the existing glass wool molding and post-processing module, is a great breakthrough in the process of developing the preparation method of the low-volume-weight rock wool, and the production scale of the low-volume-weight rock wool can reach 0.5-2 ten thousand tons. Moreover, the system can consume a large amount of coal gasification slag, improves the added value of the prepared low-volume-weight rock wool, improves the economic benefit of coal chemical enterprises, solves the environmental protection problem of the coal chemical enterprises, is an effective way and urgent need for utilization of the gasification slag at present, and has good environmental protection benefit and economic benefit.
The present invention will be described more specifically and further illustrated with reference to specific examples, which are by no means intended to limit the scope of the present invention.
The first embodiment is as follows:
the system for preparing the low-volume-weight rock wool by utilizing the gasified slag comprises a melting module, an adjusting module and a forming and post-processing module which are sequentially connected.
The raw materials used in this example were wet base coal gasification slag and other raw materials (i.e., a conditioning agent). Raw materials are mixed according to low volumeThe mass percentage of the oxides in the heavy rock wool is measured and comprises the oxides in the table 1. The components of the gasified slag are subjected to chemical analysis, and the proportion and the amount of the gasified slag powder and the conditioner and the type and the amount of the conditioner are blended and calculated according to the chemical compositions in the table 1. The dosage of the gasified slag is as high as possible, and the insufficient substances are supplemented by a conditioning agent, wherein SiO is2、Al2O3、CaO、MgO、Na2O、Fe2O3、K2O can be respectively derived from silica Sand (SiO)2) Feldspar (Al)2O3) Limestone (CaO), magnesite (MgO) and sodium carbonate (Na)2O), iron ore (Fe)2O3) Potassium carbonate (K)2O), etc., or an ore.
TABLE 1 Main chemical composition of Low volume weight rock wool (measured in terms of oxides)
| Composition of | SiO2 | Al2O3 | CaO | MgO | Na2O | Fe2O3 | K2O | TiO2 |
| Mass percent/% of | 38.5-43.5 | 14-17.1 | 18-22 | 9.5-12.5 | 0.5-3.5 | 5.5-8.5 | 0-2 | 0.5-2.5 |
After the whole system is built, firstly, a burner arranged on the tank furnace 4 is used for baking the furnace, high-temperature gas generated by the baking furnace is discharged into the drying system 2 through a high-temperature gas discharge port 1-1 of the plasma high-temperature melting furnace 1, meanwhile, the drying system 2 is started to work, and wet-based gasified slag is sent into the drying system 2 for drying, so that gasified slag powder is obtained. The dried coal gasification slag powder (the water content is less than 5 percent) is sent into a powder solid waste bin 3-1 of a solid waste conveying device 3 for storage, when the temperature of a tank furnace 4 rises to 1400 ℃ plus 1500 ℃, a plasma gun system 13 of a plasma high-temperature melting furnace 1 is started, meanwhile, a second circulating fan 15 sends one path of tail gas of a drying system 2 into a conveying pump 3-2 as carrier gas, the coal gasification slag powder in the powder solid waste bin 3-1 and a modifying agent in a modifying agent input device are conveyed to a powder input nozzle 1-2 under the driving of the carrier gas of the conveying pump 3-2, meanwhile, oxygen-enriched air prepared by an oxygen-enriched preparation device 12 is sent into an oxygen-enriched gas input nozzle 1-3, the tail gas of the drying system 2 is sent into the other plasma high-temperature melting furnace 1 through a first circulating fan 14 to maintain the weak reducing atmosphere in the furnace body, so far, the whole system enters a gasification slag melting operation state, the temperature in the furnace is kept at about 1500 ℃, and the gasification slag powder and other raw materials (namely, a hardening and tempering agent) are melted in the plasma high-temperature melting furnace 1 to form a molten mass. The melt is discharged through a melt outlet and flows into the tank furnace 4, and is stored, insulated, clarified and homogenized in the tank furnace 4; when the molten mass in the tank furnace 4 is accumulated to a certain amountThen overflows into a material channel 6 through a liquid flow hole 5; starting a combustion burner or an electric heater in the material channel 6, accurately adjusting the temperature and the viscosity of the molten mass in a temperature adjusting area of the material channel 6 to obtain the molten mass (the temperature of the molten mass is 1100-1120 ℃, and the viscosity is 10) required by the molding of the rock wool with low volume weight(1.8-2.0)Pa · s or so); and then, the melt flows into a centrifugal fiber forming system 7 of the molding and post-processing module through a liquid flowing hole arranged on a bushing at the tail end of the material channel, the melt is stretched into slender rock wool fibers, and then the slender rock wool fibers are prepared by a cotton collecting system 9, a curing system 10 and a post-processing system 11, so that the whole system enters a normal production state, and the preparation from coal gasification slag to low-volume-weight rock wool products is completed.
The product obtained in the example is determined according to the stipulations in the national Standard of the people's republic of China GB/T11835-2016 rock wool for heat insulation, slag wool and products thereof, and the volume weight of the product is not more than 36Kg/m3The other indexes (such as acidity coefficient, heating wire shrinkage, etc.) meet the specifications of the standard, and the system of the embodiment gives a product of low volume weight rock wool.
The low-volume-weight rock wool prepared by the system has stable quality, and not only can realize resource utilization of gasified slag; and basalt ore does not need to be mined, so that the environment is protected, and the method has good environmental protection benefit and economic benefit.
The system takes the gasified slag as a raw material, uses the plasma high-temperature melting furnace for quenching and tempering and melting the raw material, introduces the homogenized high-temperature molten mass in the tank furnace, also introduces the material channel for accurately adjusting the temperature and the viscosity of the molten mass, and simultaneously combines the forming and post-processing module of the glass wool, thereby overcoming the technical problem that the prior rock wool preparation system can not prepare the low-volume-weight rock wool:
the plasma high-temperature melting furnace, the tank furnace and the glass wool production system are combined, the problems of small production scale and incapability of accurately adjusting the temperature, viscosity and chemical components of a molten mass are solved, and more importantly, the low-volume-weight rock wool can be produced, wherein the volume weight of the rock wool is not higher than 36Kg/m3。
Firstly, the plasma high-temperature melting furnace and the rock wool forming system are directly connected in the prior artThen, only the conventional rock wool (volume weight is 50-200 Kg/m)3) This is because the low volume weight of rock wool cannot be prepared because of uneven and poor formation of fiber and cotton in the processes of fiber formation and cotton collection in the rock wool forming system, and even because of leaks in the cotton felt. In addition, in the prior art, a tank furnace, a throat and a material channel are not arranged between the plasma high-temperature melting furnace and the rock wool forming system, the temperature and the viscosity of the molten mass cannot be accurately adjusted, and the rate of preparing the molten mass by the plasma high-temperature melting furnace cannot keep up with the yield of the rock wool forming system, so that the whole production scale is limited. The utility model combines the plasma high-temperature melting furnace, the tank furnace, the material channel and the glass wool forming and post-processing module, so that the temperature and the viscosity of the molten mass can be accurately adjusted, and the volume weight of the molten mass is not higher than 36Kg/m3The low volume weight rock wool of (2) and its production scale is large.
Secondly, the traditional raw materials for preparing the rock wool are mainly natural basalt ore, and because the natural basalt ore has a plurality of environmental influence factors, the basalt ore existing in nature cannot be homogenized and has stable components, and the quality of the rock wool cannot be stable due to fluctuation of the components of the basalt ore. The system provided by the utility model takes the gasified slag as a main raw material, can ensure the stability of the components of the obtained molten mass by accurately tempering the gasified slag, and can ensure that the obtained molten mass can be used for a glass wool forming and post-processing module by accurately tempering and adjusting the viscosity of the molten mass in the material channel, so that the whole system can produce the low-volume-weight rock wool with stable quality.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the content of the present invention.
Claims (10)
1. The utility model provides a system for utilize gasification sediment preparation low unit weight rock wool which characterized in that includes and connects gradually:
the melting module is used for melting the coal gasification slag and the modifying agent to form a molten mass;
the adjusting module is used for accumulating, preserving heat, clarifying and homogenizing the melt, and adjusting the temperature and the viscosity of the melt to form a melt; and
the forming and post-processing module for forming and post-processing the melt is a forming and post-processing module for glass wool and comprises a centrifugal fiber forming system, a cotton collecting system, a solidifying system and a post-processing system which are sequentially connected according to the trend of the melt.
2. The system of claim 1, wherein the melting module comprises a plasma high-temperature melting furnace, a plasma gun system consisting of a plurality of direct current transferred arc or non-transferred arc plasma guns is arranged at the top of a furnace body of the plasma high-temperature melting furnace, and a powder input nozzle for simultaneously introducing coal gasification slag and a hardening and tempering agent is arranged in the middle of the furnace body.
3. The system of claim 2, wherein the adjusting module comprises a tank furnace, a throat and a material channel for precisely adjusting temperature and viscosity of the melt, which are connected in sequence according to the orientation of the melt, and are used for storing, preserving, clarifying and homogenizing the melt from the plasma high-temperature melting furnace.
4. The system as claimed in claim 3, wherein the tank furnace comprises a tank body and a furnace body, an inlet of the tank body is communicated with a molten mass discharge port at the lower part of the plasma high-temperature melting furnace, and an outlet of the tank body is communicated with the material channel through a throat.
5. The system as claimed in claim 4, wherein the end of the material channel is provided with an adjusting area for accurately adjusting temperature and viscosity of the molten mass, and combustion burners are arranged on the inner wall of the adjusting area at intervals and face the direction of the molten mass; the bottom of the material channel of the adjusting area is provided with 2-4 bushing plates, and each bushing plate is provided with a liquid flowing hole which discharges melt with suitable temperature and viscosity for forming to the forming and post-processing module at a quantitative and uniform rate.
6. The system of any one of claims 1 to 5, wherein the melting module further comprises a modifying agent input device, modifying agent is contained in the modifying agent input device, and a modifying agent outlet of the modifying agent input device is connected with a powder input nozzle arranged on the plasma high-temperature melting furnace body.
7. The system of claim 6, wherein the melting module further comprises an oxygen-enriched preparation device connected to an oxygen-enriched gas inlet nozzle provided in the middle of the furnace body for introducing oxygen-enriched air; the powder input nozzle and the oxygen-enriched gas input nozzle are converged outside the furnace body to form a total feeding nozzle, and the total feeding nozzle is communicated with the furnace body.
8. The system of claim 7, wherein the melting module is provided with a drying system and a solid waste conveying device, wherein the drying system is used for receiving and drying original gasified slag waste materials and the solid waste conveying device is used for conveying dried gasified slag; the discharge end of the solid waste conveying device is connected with the powder input nozzle.
9. The system of claim 8, wherein the drying system comprises a feed end, a discharge end, and an inlet end, an exhaust end; the discharge end is connected with a powder solid waste bin of the solid waste conveying device; the gas inlet end is connected with a high-temperature gas discharge port which is arranged at the upper part of the plasma high-temperature melting furnace and is used for discharging high-temperature gas generated by combustion, so that the high-temperature gas can be used as a drying heat source and introduced into a drying system; the exhaust end is divided into three paths, the first path is directly connected with the plasma high-temperature melting furnace through a first circulating fan, the second path is connected with a conveying pump of the solid waste conveying device through a second circulating fan, and the third path is connected with a tail gas treatment system.
10. The system of claim 9, wherein the solid waste conveying device is a pneumatic powder conveying system comprising a powder solid waste bin for receiving and storing dried gasified slag and a conveying pump for conveying the powder solid waste bin to the powder input nozzle; the feed end of the conveying pump is connected with the powder solid waste bin, and the air inlet end of the conveying pump is connected with the air outlet end of the drying system.
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| CN202122461182.0U CN216191916U (en) | 2021-10-13 | 2021-10-13 | System for utilize gasification sediment preparation low unit weight rock wool |
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| CN202122461182.0U CN216191916U (en) | 2021-10-13 | 2021-10-13 | System for utilize gasification sediment preparation low unit weight rock wool |
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