CN113003930A

CN113003930A - Method and system for producing glass fiber product by using liquid slag discharge boiler

Info

Publication number: CN113003930A
Application number: CN202110364939.6A
Authority: CN
Inventors: 孙叶柱
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-06-22

Abstract

The invention provides a method and a system for producing glass fiber products by using a liquid-state slag discharge boiler, and relates to the field of waste gas and solid waste treatment. The system and the production method for producing the glass fiber product by using the liquid-state slag discharging boiler can reduce the total amount of the solid waste discharged by the power plant, effectively utilize the residual heat of slag liquid, efficiently utilize process products such as steam, pressurized air, electric energy, circulating water and the like produced by the power plant boiler, and convert the solid waste of the power plant into industrial products by using equipment of the boiler. Compared with the traditional method, the method has the advantages of improving the energy utilization efficiency, reducing the solid waste discharge of the power plant, reducing the pollutant discharge and increasing the economic benefit and social benefit of the power plant.

Description

Method and system for producing glass fiber product by using liquid slag discharge boiler

Technical Field

The invention relates to the field of waste gas and solid waste treatment, in particular to a method and a system for producing glass fiber products by using a liquid-state slag discharge boiler.

Background

The glass fiber products such as rock wool and the like belong to high-energy-consumption and high-pollution products, and the main production process is to heat raw materials to a molten state and then process the molten liquid into the glass fiber products such as rock wool and the like by using processing equipment, so that a large amount of energy is consumed in the whole processing process to carry out high-temperature melting on the raw materials, and environment-friendly treatment such as dust removal, desulfurization and the like is required to be carried out on high-temperature flue gas generated in the production process. At present, domestic rock wool manufacturing smelting furnaces largely use coke smelting furnaces, the smelting furnaces have the advantages of simple process and convenient raw materials, but have the defect of high energy consumption, and meanwhile, high-temperature flue gas containing a large amount of pollutants such as nitrogen oxide, sulfur dioxide and dust can be generated to seriously influence environmental protection, so that in regions with strict partial energy and environmental protection policies, the rock wool manufacturing industry is greatly limited, and even partial factories are shut down.

In view of this, the present invention is particularly proposed to reduce the total amount of solid waste discharged and realize the recycling of the solid waste.

Disclosure of Invention

The invention aims to provide a method and a system for producing glass fiber products by using a liquid slag discharge boiler so as to solve the technical problem.

At present, a slag tapping boiler of a large coal-fired power plant melts ash to be in a fluid state by utilizing higher hearth temperature, the melted slag liquid falls into a granulating water tank through a slag flowing port at the bottom of the furnace, and the slag liquid is quenched in the water tank to be granulated to form vitreous body particles, so that the aims of slag tapping and ash reduction are fulfilled. The inventors have analyzed the physicochemical properties of slag from slagging boilers and the resulting vitreous waste slag, and have found that both have substantially the same chemical element composition and viscosity-temperature characteristics as those of melts for glass fiber products such as rock wool, and have a promising prospect for producing glass fiber products such as rock wool.

Therefore, the method for coproducing glass fiber products such as rock wool and the like by using the slag tapping boiler of the coal-fired power plant is particularly provided, the conditioning agent is added into the slag liquid of the slag tapping boiler of the large-scale coal-fired power plant to realize in-furnace conditioning, after the slag liquid flows out of a slag opening, the steam of the boiler or the pressurized air of the boiler is blown out by a blowing gun to form blowing air flow, so that the slag liquid is rapidly cooled, the slag liquid forms glass fiber, and finally the glass fiber products such as rock wool and the like are formed.

The invention is realized by the following steps:

the invention provides a system for producing glass fiber products by using a liquid slag discharging boiler, which comprises a slag melting system and a cotton making system, wherein the slag melting system comprises the liquid slag discharging boiler, the wall of the liquid slag discharging boiler is provided with a quenching and tempering agent nozzle in the boiler, the bottom of the liquid slag discharging boiler is provided with a slag flowing port, the cotton making system comprises an overflow funnel, a slag hopper, a blowing gun, a blowing pipeline, a cotton collecting chamber and a felt rolling machine, the slag flowing port is positioned above the overflow funnel, the overflow funnel is positioned in the slag hopper, the blowing gun is provided with a nozzle end extending into the slag hopper, the blowing gun is positioned below the overflow funnel, one end of the blowing gun, which is far away from the nozzle, is connected with the blowing pipeline, the cotton collecting chamber and the blowing gun are oppositely arranged in the slag hopper, and the cotton collecting chamber is connected with the externally.

The system utilizes the characteristic of liquid state slag discharging of the liquid state slag discharging boiler of the coal-fired power plant, and converts high-temperature slag liquid produced by the liquid state slag discharging boiler into glass fiber products by utilizing steam, pressurized air (as injection media), circulating water, electric energy and the like produced by a unit of the coal-fired power plant.

The quenching and tempering agent nozzle is arranged in the slag system, so that the quenching and tempering agent is added into the slag liquid, and the addition of the quenching and tempering agent can realize the adjustment of the viscosity-temperature characteristic of the slag liquid on one hand, thereby ensuring that the slag liquid smoothly flows out of the slag flowing nozzle, and on the other hand, the physicochemical characteristic of the slag liquid can be more close to the requirement of a better high-quality glass fiber product. In other embodiments, the addition of a conditioning agent may be omitted depending on the product to be produced. If no modifying agent is added, the glass fiber materials such as granular cotton, mineral wool or rock wool and the like with different qualities can be produced according to different qualities of the coal-fired ash, and the addition of the modifying agent can accurately regulate and control the physical and chemical properties of the required slag liquid, so that a glass fiber product with higher quality can be obtained.

The composition or formula of the modifying agent can be selected from the following compositions or formulas: the modifier can be divided into acid modifier and alkaline modifier according to different coal quality.

The modifying agent is an acidic modifying agent or an alkaline modifying agent; the acidic modifying agent is selected from silicon salts or aluminum salts; the common modifier is mainly aluminosilicate carbonate.

The alkaline modifying agent is at least one selected from calcium salt, magnesium salt, sodium salt and potassium salt, and the common modifying agent mainly comprises calcium carbonate and magnesium carbonate.

Adding an acidic modifying agent or an alkaline modifying agent according to different acidity coefficients of the coal-fired ash components, wherein the acidity coefficient of the coal-fired ash components is the total ratio of acidic compounds to the total ratio of alkaline compounds.

When the overall acidity coefficient of the coal ash component is less than 2.4, the acidic modifying agent is added, and when the overall acidity coefficient of the coal ash component is more than 2.7, the alkaline modifying agent, namely the acidic compound, is added. When the overall acidity coefficient of the coal ash component is between 2.4 and 2.7, no modifying agent is needed to be added.

The quenching and tempering agent can be added according to different proportions of the components of the coal-fired ash slag, and the quenching and tempering agent can ensure that the physicochemical properties of the coal-fired slag meet the following requirements after the quenching and tempering agent is added:

(1) the ash melting point is 1200-1350 ℃;

(2) the viscosity of the formed slag liquid is about 15 Pa.s at 1250 ℃;

(3) the viscous temperature characteristic of the slag liquid is tested, and the critical temperature is less than 1250 ℃.

Furthermore, the overflow funnel is arranged to enable the high-temperature slag liquid flowing down from the slag flowing port to form a high-temperature slag liquid column meeting the glass fiber manufacturing conditions, and the overflow funnel can also guide the redundant slag liquid into the slag pool from the overflow grooves on the two sides. The blowing pipeline connects blowing media such as boiler steam or boiler pressurized air to a blowing gun, forms blowing air flow by taking the boiler steam or the boiler pressurized air as the blowing media to blow slag liquid flowing from a slag hole, and the blowing air flow rapidly cools the slag liquid to form glass bodies and simultaneously enables the glass bodies to quickly form glass fiber yarns. The glass fiber yarn falls into a cotton collecting chamber for subsequent treatments such as felt rolling and the like.

After the glass fibers are accumulated into cotton in the cotton collecting chamber, the conveyer belt is rotated to convey the glass fiber cotton to the felt rolling machine, and the glass fiber cotton is rolled into glass fiber products such as rock wool or mineral wool by the felt rolling machine.

In a preferred embodiment of the present invention, the glass fiber product is selected from at least one of the following products: twistless roving, plaid, fiberglass mat, fiberglass fabric, combined fiberglass reinforcement, rock wool, and mineral wool.

The untwisted roving may be at least one of an injection untwisted roving, an SMC (sheet molding compound) untwisted roving, a winding untwisted roving, a pultrusion untwisted roving, a weaving untwisted roving, and a preform untwisted roving, for example.

The glass fiber mat may be a chopped strand mat, a continuous strand mat, a surfacing mat, a needled mat, or chopped strands.

The glass fiber fabric can be woven fabric, knitted fabric, braided fabric and the like.

The combined glass fiber reinforced material can be chopped strand mat + untwisted roving fabric, chopped strand mat + untwisted roving cloth + chopped strand mat, chopped strand mat + continuous strand mat + chopped strand mat, chopped strand mat + random untwisted roving, chopped strand mat + unidirectional carbon fiber, chopped strand + surfacing mat, glass cloth + unidirectional untwisted roving or glass cloth + glass slim rod + glass cloth.

In other embodiments, other fiberglass products can be produced by the production system of the present invention, and are not limited to the types of fiberglass products listed above.

In a preferred embodiment of the present invention, the system further comprises an exhaust gas and waste residue treatment system, the exhaust gas and waste residue treatment system comprises an exhaust gas pipe, a slag pool and a slag salvaging machine, one end of the exhaust gas pipe is connected with the bottom of the slag bucket, the other end of the exhaust gas pipe is connected with a dust removal device arranged outside the liquid slag removal boiler, and the slag pool is arranged below the slag bucket. In one embodiment, the dragveyer may be positioned within or outside of the slag bath as desired.

Preferably, a smoke temperature detection point is provided at the inlet of the exhaust pipe.

In other embodiments, the waste gas pipe can be connected with external dust collectors, draught fans, desulfurizing towers and other equipment, so that pollutants such as dust in the production process can be removed, and corresponding environmental protection parameters can be monitored in real time by using environmental protection detection equipment of the coal-fired power plant unit. In an embodiment, the dust remover, the induced draft fan and the desulfurizing tower are self-equipment of the coal-fired power plant unit, and a new dust remover, an induced draft fan or a desulfurizing tower can be selectively introduced according to actual production needs.

In one embodiment, the negative pressure generated by the induced draft fan of the slagging boiler before the dust remover is used for sucking the waste gas in the slag hopper to the front of the dust remover so as to maintain the slag hopper in a negative pressure state. On one hand, high-temperature flue gas, residual blowing medium and overflow slag liquid in the slag hopper, which enter the slag hopper through a slag flowing port, are cooled in a slag pool to generate water vapor and flue gas dust particles, and waste gas mixtures such as fine glass fibers floating in the air in the blowing process, are mixed with boiler flue gas, then the mixture is sent into a dust remover together, pollutants in the waste gas are removed completely through conventional environment-friendly equipment of a coal-fired power station such as the dust remover and a desulfurizing tower, and the residual clean flue gas is discharged into the atmosphere after being measured by environment-friendly monitoring equipment; on the other hand, the high-temperature flue gas which can be sucked under the negative pressure of the slag hopper enters the slag hopper to maintain the internal temperature of the slag hopper, so that high-temperature slag liquid flows out from a slag flowing port, and meanwhile, water vapor generated by cooling the overflowing slag liquid in a slag pool can be sucked cleanly, so that the water vapor is prevented from reducing the environmental temperature in the slag hopper.

In a preferred embodiment of the invention, the peripheral wall of the slag hopper is provided with a composite heat-insulating layer; preferably, the composite heat-insulating layer is a composite heat-insulating layer compounded by corundum castable and heat-resistant heat-insulating castable.

The composite heat-insulating layer of the slag hopper is beneficial to avoiding the heat loss in the slag hopper as much as possible, and ensures that the slag liquid has good fluidity all the time when flowing out of the slag outlet. In other embodiments, the material of the insulation layer may be selected from other insulation materials, such as rock wool panels, rock wool felt, rock wool composite panels, and the like, as desired.

In a preferred embodiment of the invention, the system further comprises an emergency equipment exit system, the emergency equipment exit system comprises a blowing system guide rail, a cotton collecting chamber felt rolling machine moving guide rail, a sealing flange and a manhole door, the blowing system guide rail is arranged below the blowing pipeline, the cotton collecting chamber felt rolling machine moving guide rail is arranged below the cotton collecting chamber and the felt rolling machine, and the sealing flange and the manhole door are arranged on the side wall of the slag hopper.

The emergency equipment quitting system can immediately stop the production of the glass fiber products when an emergency occurs, and is beneficial to ensuring the safe and stable operation of the coal-fired generator set and the safety of a power grid. The production equipment such as a blowing system, a cotton collecting chamber, a felt rolling machine and the like is quickly moved out of a boiler slag hopper by utilizing a movable guide rail, and the slag hopper is blocked by using a sealing flange and a manhole door so as to ensure the safe operation of a unit.

In one embodiment, guide wheels that engage with a moving guide rail (i.e., a blowing system guide rail or a collecting chamber felt rolling machine moving guide rail) are provided below the blowing duct, the collecting chamber, and the felt rolling machine, and a stopper may be provided at each end of the moving guide rail as needed.

In a preferred embodiment of the present invention, the blowing duct is further provided with a flow rate detection point and a temperature detection point. The flow and the temperature of the blowing medium are controlled through the detection of the flow and the temperature, so as to ensure that the blowing air flow meets the cotton forming requirement.

A method for producing glass fiber products by using a system for producing glass fiber products by using a liquid-state slag discharging boiler comprises the steps of introducing pulverized coal airflow into the liquid-state slag discharging boiler, adding a modifying agent into the liquid-state slag discharging boiler from a modifying agent nozzle, forming slag liquid through combustion in the boiler, enabling the slag liquid to flow out of a slag flowing port to enter a slag hopper, regulating and controlling the flow rate of the slag liquid and the size of a liquid column through an overflow hopper, blowing the slag liquid into glass fiber yarns by using a blowing medium of a blowing gun, and making the glass fiber yarns into the glass fiber products by a felt winding machine after the glass fiber yarns fall into a cotton collecting chamber.

In order to ensure the fluidity of the slag liquid and to ensure that the slag liquid can smoothly flow out of the slag tap, the ash content and the viscosity-temperature characteristic of the coal are limited, or the following requirements can be met after a quenching and tempering agent is added:

(1) the ash melting point is 1200-1350 ℃;

(2) the viscosity of the formed slag liquid is about 15 Pa.s at 1250 ℃;

In a preferred embodiment of the present invention, the method further includes flowing the excess slag liquid into the slag pool through the overflow funnel from the diversion trenches arranged at both sides of the overflow funnel, and then collecting and processing the excess slag liquid through the slag dragging machine.

In the preferred embodiment of the present invention, said blowing medium is derived from steam or pressurized air of the boiler itself;

preferably, the injection medium originates from steam or pressurized air of a slagging boiler.

In a liquid slag discharging boiler, the hardening and tempering agent is sucked by pulverized coal airflow, fully mixed and violently combusted to form high-temperature slag liquid, and the high-temperature slag liquid is gathered near a slag flowing port at the bottom of the boiler and flows out of the slag flowing port. And because of the suction effect of the waste gas pipe of the slag hopper, the interior of the slag hopper is in a negative pressure state, and part of high-temperature flue gas enters the slag hopper along with slag liquid. And then the slag liquid flows into an overflow funnel, the flow rate and the liquid column size of the high-temperature slag liquid are kept in the optimal value range through the overflow slag hopper, the overflowed slag liquid falls into a slag pool along an overflow groove, and is rapidly cooled and granulated into slag particles in the slag pool, and then the slag particles are conveyed to a transfer station by a subsequent slag conveyor.

In one embodiment, the blowing pipe introduces a blowing medium such as boiler steam or boiler pressurized air into the blowing gun, the boiler steam or the boiler pressurized air is used as the blowing medium to form a blowing air flow to blow the high-temperature slag liquid flowing from the slag port, the blowing air flow rapidly forms glass fiber filaments into a glass body while quenching the high-temperature slag liquid to form the glass body, the glass fiber filaments fall into the cotton collecting chamber, the glass fiber filaments are accumulated into cotton in the cotton collecting chamber, then the conveying belt is rotated to convey the glass fiber cotton to the felt rolling machine, and the glass fiber cotton is rolled into glass fiber products such as rock wool or mineral wool by the felt rolling machine.

In a preferred embodiment of the present invention, the method further includes: when the operation is stopped, the blowing gun and the blowing pipeline are moved to the slag hopper by using the guide rail of the blowing system, the flange is used for sealing the slag hopper, the cotton collecting chamber and the felt rolling machine are moved out of the slag hopper by using the movable guide rail of the cotton collecting chamber felt rolling machine, and the manhole door is used for sealing the slag hopper.

Compared with the prior art, the invention has the beneficial effects that:

the system and the production method for producing the glass fiber product by using the liquid-state slag discharging boiler can reduce the total amount of the solid waste discharged by the power plant, effectively utilize the residual heat of slag liquid, efficiently utilize process products such as steam, pressurized air, electric energy, circulating water and the like produced by the power plant boiler, and convert the solid waste of the power plant into industrial products by using equipment of the boiler. Compared with the traditional method, the method has the advantages of improving the energy utilization efficiency, reducing the solid waste discharge of the power plant, reducing the pollutant discharge and increasing the economic benefit and social benefit of the power plant.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a system diagram of fiberglass product production using a slagging boiler;

FIG. 2 is a schematic diagram of the structure of an overflow funnel;

fig. 3 is a schematic diagram of overflow slag liquid via an overflow funnel.

Icon: 1-liquid state slag discharging boiler; 2-nozzle of quenching and tempering agent in the furnace; 3-a burner; 4-slag flowing port; 5-an overflow funnel; 6-blowing a medium; 7-blowing a pipeline; 8-a spray gun; 9-a slag hopper; a composite heat insulation layer-91; 92-a sealing flange; 93-manhole door; 10-a cotton collecting chamber; 11-rolling a felt machine; 12-an exhaust gas pipe; 13-a slag bath; 14-a dragveyer; 15-blowing system guide rails; 16-collecting chamber rolling felt machine moving guide rail.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when in use, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1, the present embodiment provides a system for producing fiberglass products by using a slagging boiler. The system comprises a slag system, a cotton making system, a waste gas and waste residue treatment system and an emergency equipment exit system. The four branch systems are utilized to realize the recycling of solid wastes and the production of glass fiber products.

Specifically, the slag system includes slag tapping boiler 1, set up interior quenching and tempering agent spout 2 on slag tapping boiler 1's the oven, slag tapping boiler 1's bottom is provided with slag tap 4, the system cotton system includes overflow funnel 5, the sediment fill 9, the injection rifle 8, the injection pipeline 7, cotton collecting chamber 10 and book felt machine 11, slag tap 4 is located overflow funnel 5 top, overflow funnel 5 is located the sediment fill 9, injection rifle 8 has the nozzle end that extends to the interior of sediment fill 9 and the injection rifle is located overflow funnel 5 below, the one end that the nozzle was kept away from to injection rifle 8 links to each other with injection pipeline 7, in sediment fill 9, cotton collecting chamber 10 sets up with the relative of injection rifle 8, the one end of cotton collecting chamber 10 links to each other with the book felt machine 11 of peripheral hardware.

Fig. 2 and 3 show a schematic diagram of the structure of the overflow funnel and a schematic diagram of overflow of the overflow slag liquid through the overflow funnel.

The top of the liquid slag discharging boiler 1 is also provided with a high-temperature flue gas outlet which can be connected with external dust removal equipment or sulfur removal equipment, so that environment-friendly discharge is realized.

Referring to fig. 1, a burner 3 is further provided at the top of the slagging tap boiler 1, and the burner 3 is used to achieve intensive combustion of the pulverized coal stream.

Furthermore, a flow and temperature measuring device is also installed on the blowing pipeline 7 to ensure that the blowing airflow meets the cotton forming requirement.

It should be noted that in this embodiment, a conveying belt is disposed in the cotton collecting chamber 10 to timely convey away the glass fibers, and then the belt is driven by an electric rotating shaft to rotate, so as to convey the glass fiber cotton to the felt rolling machine 11.

The waste gas and waste residue treatment system comprises a waste gas pipe 12, a slag pool 13 and a slag salvaging machine 14, wherein one end of the waste gas pipe 12 is connected with the bottom of a slag hopper 9, the other end of the waste gas pipe 12 is connected with dust removing equipment arranged outside the liquid slag-removing boiler 1, the slag pool 13 is arranged below the slag hopper 9, and the slag salvaging machine 14 is arranged in the slag pool 13 or outside the slag pool 13.

The peripheral wall of the slag hopper 9 is provided with a composite heat-insulating layer 91; in the embodiment, the composite heat-insulating layer is a composite heat-insulating layer compounded by corundum castable and heat-resistant heat-insulating castable. In other embodiments, the heat-insulating material may be rock wool or the like.

In fig. 1, a smoke temperature detection point is provided at an inlet of the exhaust pipe 12; the dedusting and desulfurizing equipment comprises a deduster, an induced draft fan and a desulfurizing tower (not shown in the figure) which are arranged outside. Used for monitoring whether the environmental temperature of the slag hopper 9 meets the cotton forming requirement or not.

In this embodiment, a sampling device and a temperature measuring device (not shown in the figure) are disposed at the slag hole 4, and the slag liquid can be sampled to determine the physicochemical characteristics of the slag liquid and monitor whether the temperature of the slag liquid meets the requirement of forming cotton.

The emergency equipment withdrawing system comprises a blowing system guide rail 15, a cotton collecting chamber felt rolling machine moving guide rail 16, a sealing flange 92 and a manhole door 93, wherein the blowing system guide rail 15 is arranged below a blowing pipeline 7, the cotton collecting chamber 10 felt rolling machine moving guide rail is arranged below a cotton collecting chamber 10 and a felt rolling machine, and the sealing flange 92 and the manhole door 93 are arranged on the side wall of the slag hopper.

The method for producing the glass fiber product by using the system comprises the following steps:

coal is formed into coal dust airflow through a burner 3 and enters the slag tapping boiler 1, meanwhile, a modifying agent is added from a modifying agent nozzle 2 in the boiler and enters the slag tapping boiler 1, the coal dust airflow is fully mixed and violently combusted to form high-temperature slag liquid, and the high-temperature slag liquid is gathered near a bottom slag tapping hole 4 and flows out of the slag tapping hole 4 in a parallel flow mode.

When the high-temperature slag liquid flows out of the slag flowing port 4 and falls into the overflow funnel 5, the flow rate and the liquid column size of the high-temperature slag liquid are kept in the optimal value range through the overflow funnel, and the overflowed slag liquid falls into the slag pool 13 along the overflow groove, is rapidly cooled and granulated into slag particles and is conveyed to a transfer station by the slag dragging machine 14.

When the high-temperature slag liquid flows near the blowing gun 8, boiler steam or high-pressure air of the boiler is conveyed into the blowing gun 8 by the blowing pipeline 7 as a blowing medium 6 to form blowing air flow, the high-temperature slag liquid is blown, and the blowing air flow rapidly forms glass fiber filaments while the high-temperature slag liquid is quenched into glass bodies.

The glass fiber yarns fall into a cotton collecting chamber 10, the glass fiber yarns are piled into cotton in the cotton collecting chamber 10, then a conveyer belt is rotated to convey the glass fiber cotton to a felt rolling machine 11, and the glass fiber cotton is rolled into glass fiber products such as rock wool or mineral wool by the felt rolling machine 11. The slag liquid which does not form the glass fiber flows into the bottom slag pool 13 to be rapidly cooled to form slag particles, and the slag particles are transported out through the slag conveyor 14.

One end of a waste gas pipe 12 is connected with a slag hopper 9, the other end of the waste gas pipe is connected with a dust remover of a boiler body, waste gas in the slag hopper 9 is sucked to the front of the dust remover through negative pressure formed by a boiler induced draft fan in front of the dust remover, so that the slag hopper 9 is maintained in a negative pressure state, on one hand, a waste gas mixture of high-temperature flue gas, residual blowing medium (the blowing medium is derived from boiler steam or boiler pressurized air), water steam, flue gas dust particles and fine glass fibers floating in the air in the blowing process in the slag hopper 9 through a slag flowing port is mixed with the boiler flue gas and then is sent into the dust remover together, pollutants in the waste gas are removed completely through conventional coal-fired environment-friendly equipment such as the dust remover and a desulfurizing tower, and the residual clean flue gas is discharged into the atmosphere after being measured by environment-friendly monitoring equipment; on the other hand, the negative pressure of the slag hopper 9 is maintained, and the high-temperature flue gas enters the slag hopper 9 to maintain the internal temperature of the slag hopper 9, so that the high-temperature slag liquid flows out from the slag flowing port, and meanwhile, the water vapor generated by cooling the overflowing slag liquid in the slag pool 13 is pumped completely to prevent the water vapor from reducing the environmental temperature in the slag hopper 9.

The injection system guide rail 15 can move the injection gun 8 and the injection pipeline 7 out of the slag hopper 9 when the operation is stopped, and the flange is used for sealing the slag hopper 9.

When the operation of the collecting chamber felt rolling machine moving guide rail 16 can be stopped, the collecting chamber 10, the felt rolling machine 11 and other equipment are moved out of the slag hopper 9, and the slag hopper 9 is closed by using a manhole door.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for producing glass fiber products by using a liquid slag discharging boiler, which is characterized in that, the device comprises a slag system and a cotton making system, wherein the slag system comprises a slag tapping boiler, the wall of the slag tapping boiler is provided with a nozzle for a quenching and tempering agent in the boiler, the bottom of the liquid slag discharging boiler is provided with a slag flowing port, the cotton making system comprises an overflow funnel, a slag hopper, a blowing gun, a blowing pipeline, a cotton collecting chamber and a felt rolling machine, the slag flowing port is positioned above the overflow funnel, the overflow funnel is positioned in the slag hopper, the blowing gun is provided with a nozzle end extending into the slag hopper and is positioned below the overflow funnel, one end of the blowing gun far away from the nozzle is connected with the blowing pipeline, in the slag hopper, the cotton collecting chamber is arranged opposite to the blowing gun, and the cotton collecting chamber is connected with an external felt rolling machine.

2. The system for producing glass fiber products by using the slagging boiler according to claim 1, further comprising an exhaust gas and waste residue treatment system, wherein the exhaust gas and waste residue treatment system comprises an exhaust gas pipe, a slag bath and a slag dragveyer, one end of the exhaust gas pipe is connected with the bottom of the slag hopper, the other end of the exhaust gas pipe is connected with a dust removal device arranged outside the slagging boiler, and the slag bath is arranged below the slag hopper;

preferably, a smoke temperature detection point is arranged at the inlet of the exhaust pipe; preferably, the dust removing equipment comprises a dust remover, an induced draft fan and a desulfurizing tower.

3. The system for producing glass fiber products by using the slagging boiler according to claim 1 or 2, further comprising an emergency equipment exit system, wherein the emergency equipment exit system comprises a blowing system guide rail, a cotton collecting chamber felt rolling machine moving guide rail, a sealing flange and a manhole door, the blowing system guide rail is arranged below the blowing pipeline, the cotton collecting chamber felt rolling machine moving guide rail is arranged below the cotton collecting chamber and the felt rolling machine, and the sealing flange and the manhole door are arranged at the side wall of the slag hopper.

4. The system for producing glass fiber products by using a slagging boiler according to claim 1, wherein the peripheral wall of the slag hopper is provided with a composite insulating layer; preferably, the composite heat-insulating layer is a composite heat-insulating layer compounded by corundum castable and heat-resistant heat-insulating castable.

5. The system for producing glass fiber products using a slagging boiler according to claim 1, wherein the blowing duct is further provided with a flow detection point and a temperature detection point.

6. The method for producing glass fiber products by using the system for producing glass fiber products by using the slagging tap boiler as claimed in any one of claims 1 to 5, wherein the method comprises the steps of introducing pulverized coal airflow into the slagging tap boiler, simultaneously adding a modifying agent into the slagging tap boiler through a modifying agent nozzle, forming slag liquid through combustion in the boiler, enabling the slag liquid to flow out of the slag tap into the slag hopper, regulating the flow rate of the slag liquid and the size of a liquid column through the overflow hopper, blowing the slag liquid into glass fiber filaments by using a blowing medium of the blowing gun, and making the glass fiber filaments into the glass fiber products by using a felting machine after the glass fiber filaments fall into the cotton collecting chamber.

7. The method according to claim 6, further comprising flowing the excess slag liquid from guide grooves arranged on two sides of the overflow funnel into a slag pool through the overflow funnel, and then collecting and processing the slag liquid through a slag dragging machine;

preferably, the modifying agent is an acidic modifying agent or an alkaline modifying agent; the acidic modifying agent is selected from silicon salts or aluminum salts; the alkaline modifying agent is selected from at least one of calcium salt, magnesium salt, sodium salt and potassium salt, when the overall acidity coefficient of the coal ash component is less than 2.4, the acidic modifying agent is added, and when the overall acidity coefficient of the coal ash component is more than 2.7, the alkaline modifying agent is added.

8. The method of claim 6, wherein the blowing medium is derived from the steam or pressurized air of the boiler itself;

preferably, the blowing medium is derived from steam or pressurized air of a slagging boiler.

9. The method of claim 6, wherein the fiberglass article is selected from at least one of: twistless roving, plaid, fiberglass mat, fiberglass fabric, combined fiberglass reinforcement, rock wool, and mineral wool.

10. The method of claim 6, further comprising: when the operation is stopped, the blowing gun and the blowing pipeline are moved out of the slag hopper by using a guide rail of a blowing system, the slag hopper is sealed by using a flange, the cotton collecting chamber and the felt rolling machine are moved out of the slag hopper by using a movable guide rail of the cotton collecting chamber felt rolling machine, and the slag hopper is sealed by using a manhole door.