CN220328313U - Raw material drying section flue gas treatment device in microcrystalline glass preparation process - Google Patents

Abstract

The application discloses a raw material drying section flue gas treatment device in a microcrystalline glass preparation process, which can help to realize energy conservation and emission reduction based on an improved microcrystalline glass preparation process. The device comprises: the flue gas filtering device is used for physically intercepting solid particles in flue gas to be filtered through the high-temperature resistant filter material so as to realize gas-solid separation; the device also comprises an air flow heat exchange device, wherein the air flow heat exchange device is used for transferring the heat of the heating medium to the heated medium; the flue gas inlet to be filtered of the flue gas filtering device is used for being connected with an exhaust port of the raw material drying section industrial kiln, the filtered flue gas outlet of the flue gas filtering device is used for being connected with a heating medium inlet of the air flow heat exchange device, and a heating medium outlet, a heated medium inlet and a heated medium outlet of the air flow heat exchange device are respectively connected with a heating medium discharge end, a heated medium supply end and a combustion-supporting gas inlet of the raw material drying section industrial kiln.

Description

Raw material drying section flue gas treatment device in microcrystalline glass preparation process

Technical Field

The embodiment of the application relates to a raw material drying section flue gas treatment device in a microcrystalline glass preparation process and a microcrystalline glass production line.

Background

Microcrystalline glass, also known as ceramic glass, is an inorganic nonmetallic material that forms a multiphase complex containing a dense microcrystalline phase and a glass phase by uniformly precipitating a large number of fine crystals in the glass. The glass ceramics has the dual characteristics of glass and ceramic, has higher brightness and toughness than the ceramic, and can be particularly used as a building decorative material with stronger market competitiveness. The production process of the microcrystalline glass mainly comprises a sintering method, a calendaring method, a casting method and the like, wherein the sintering method and the calendaring method are the most common. Generally speaking: the production process flow of the sintering method can be divided into burdening, smelting, water quenching, crushing, screening, die filling, sintering and polishing; the production process flow of the calendaring method can be divided into burdening, smelting, calendaring molding, heat treatment (crystallization), annealing and polishing; the production process flow of the casting method can be divided into burdening, smelting, casting forming, heat treatment (crystallization), annealing and polishing. The above processes all need to perform smelting treatment on the mixed raw materials after proportioning to extract glass liquid, but how to prepare glass liquid into glass ceramics is the main difference of the production processes.

At present, the energy-saving and emission-reducing requirements of the microcrystalline glass production process are increasingly increased, and the energy consumption and the emission of atmospheric pollutants are often required to be reduced. The prior microcrystalline glass preparation process lacks measures capable of scientifically and effectively combining the optimization of the microcrystalline glass production process with the industrial kiln flue gas treatment scheme, so that the energy saving and emission reduction effects are not obvious in the field of microcrystalline glass production.

In addition, because the cooling water is required to be provided for the submerged arc furnace (electric furnace) for smelting treatment and the processing water is required to be provided for the polishing work section in the running process of the existing glass ceramic production process, the two paths of water supply are independent of each other and lack of corresponding treatment measures, the water consumption is high in the running process of the glass ceramic production process, the water quality of the cooling water is poor, the water cooling system of the submerged arc furnace is easy to fail, and in addition, the processing water provided for the polishing work section cannot be effectively recycled after the water becomes sewage, so that the environment is polluted.

Disclosure of Invention

The embodiment of the application provides a raw material drying section flue gas treatment device in a microcrystalline glass preparation process, which can help to realize energy conservation and emission reduction based on the improved microcrystalline glass preparation process.

According to one aspect of the application, there is provided a raw material drying section flue gas treatment device used in a microcrystalline glass preparation process, the microcrystalline glass preparation process including a raw material drying section for dehydrating a corresponding raw material by a raw material drying section industrial kiln, a raw material pre-reduction section for reducing at least part of components in the dehydrated raw material to metal by a raw material pre-reduction section industrial kiln and pre-reducing the dehydrated raw material with a reducing agent, and a raw material smelting section for smelting the mixed raw material containing the pre-reduced raw material by a raw material smelting section industrial kiln to extract a desired glass liquid and obtain a byproduct formed of the metal, the glass liquid being used for preparing microcrystalline glass.

The flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process comprises: the flue gas filtering device is used for physically intercepting solid particles in flue gas to be filtered through the high-temperature resistant filter material so as to realize gas-solid separation; the device also comprises an air flow heat exchange device, wherein the air flow heat exchange device is used for transferring the heat of the heating medium to the heated medium; the flue gas inlet to be filtered of the flue gas filtering device is used for being connected with an exhaust port of the raw material drying section industrial kiln, the filtered flue gas outlet of the flue gas filtering device is used for being connected with a heating medium inlet of the air flow heat exchange device, and a heating medium outlet, a heated medium inlet and a heated medium outlet of the air flow heat exchange device are respectively connected with a heating medium discharge end, a heated medium supply end and a combustion-supporting gas inlet of the raw material drying section industrial kiln.

According to the embodiment of the flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process, the flue gas filter device is a built-in high temperature resistant filter material, and belongs to a flue gas filter of a metal filter material or a ceramic filter material.

According to the embodiment of the flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process, the air flow heat exchange device adopts a dividing wall type heat exchanger.

According to the embodiment of the flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process, the dust recovery structure of the flue gas filtering device is connected to the feed inlet of the raw material pre-reduction section industrial kiln through the dust conveying mechanism.

According to the embodiment of the flue gas treatment device for the raw material drying section in the microcrystalline glass preparation process, the heating medium discharge end is a chimney.

According to the embodiment of the flue gas treatment device for the raw material drying section in the microcrystalline glass preparation process, the heated medium supply end is an external atmosphere.

According to the embodiment of the flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process, the heated medium outlet of the air flow heat exchange device is connected with the combustion-supporting gas inlet of the industrial kiln of the raw material drying section through a gas mixing pipeline; the gas mixing pipeline is connected with the heated medium outlet and a gas supply source, and the gas of the gas supply source is the gas discharged from the industrial kiln of the raw material smelting section and purified.

According to the embodiment of the flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process, red mud is adopted as a main raw material in the microcrystalline glass preparation process; the raw material drying section is used for dewatering the red mud through a raw material drying section industrial kiln, and the raw material pre-reduction section is used for reducing at least part of iron elements in the red mud into metallic iron through the raw material pre-reduction section industrial kiln and pre-reduction treatment of the dewatered red mud by using a reducing agent.

According to the embodiment of the flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process, the raw material drying section industrial kiln adopts a drying kiln and/or the raw material pre-reduction section industrial kiln adopts a rotary kiln and/or the raw material smelting section industrial kiln adopts an ore-smelting furnace.

According to another aspect of the present application, there is also provided a glass-ceramic production line, including a raw material drying section, a raw material pre-reduction section, a raw material smelting section, a glass-liquid forming section, a glass-plate annealing section, a glass-plate crystallization section and a glass-ceramic polishing processing section, which are sequentially disposed in the front-rear direction of a glass-ceramic production process route, wherein the raw material drying section is used for dewatering respective raw materials through a raw material drying section industrial kiln, the raw material pre-reduction section is used for reducing at least part of components in the raw materials into metals through a raw material pre-reduction section industrial kiln and pre-reducing the respective raw materials with a reducing agent, the raw material smelting section is used for smelting the mixed raw materials containing the pre-reduced raw materials through the raw material smelting section industrial kiln to extract a desired glass liquid and obtain byproducts formed by the metals, the glass-liquid forming section is used for forming the glass liquid into glass plates, the glass-ceramic annealing section is used for annealing the glass plates, and the glass plate crystallization section is used for crystallizing the annealed glass plates to obtain glass through polishing processing of the glass plates; wherein, the raw material drying section is provided with the flue gas treatment device of the raw material drying section in any microcrystalline glass preparation process.

The flue gas treatment device for the raw material drying section in the microcrystalline glass preparation process is based on an improved microcrystalline glass preparation process. The microcrystalline glass preparation process is provided with a raw material drying section, and the raw material drying section is used for carrying out dehydration treatment on corresponding raw materials through an industrial kiln of the raw material drying section, so that the moisture in main raw materials can be sufficiently reduced, and the increase of the energy consumption in the subsequent heating process due to the increase of the moisture caused by the wetting of the raw materials in factories and the like is prevented. The microcrystalline glass preparation process is provided with a raw material pre-reduction section, wherein the raw material pre-reduction section is used for reducing at least part of components in the dehydrated raw material into metal through a raw material pre-reduction section industrial kiln and a reducing agent, so that the coke consumption of a raw material smelting section can be obviously reduced, and the technical and economic indexes of the raw material smelting section are improved. The raw material smelting section is used for smelting the mixed raw materials containing the pre-reduced raw materials through a raw material smelting section industrial kiln so as to extract required glass liquid and obtain byproducts formed by the metals.

Through setting up fume treatment device at the raw materials dry section, this fume treatment device includes fume filtration device and gas flow heat exchange device, wherein, fume filtration device accessible high temperature resistant filter media carries out the physical interception to the solid particulate matter in the higher flue gas of temperature that raw materials dry section industrial kiln discharged, thereby realize gas-solid separation, can ensure dust removal efficiency again can keep the state that has filtered flue gas temperature higher, so, gas flow heat exchange device just can better utilize the temperature of filtered flue gas to heat by the heating medium, by the combustion-supporting gas of heating medium follow-up raw materials dry section industrial kiln entering raw materials dry section industrial kiln's combustion chamber, promote raw materials dry section industrial kiln thermal efficiency, and the solid particulate matter in the heating medium has been got rid of by comparatively abundant, can not cause atmospheric pollution. Therefore, the flue gas treatment device for the raw material drying section in the microcrystalline glass preparation process can help to realize energy conservation and emission reduction based on the improved microcrystalline glass preparation process.

Examples of the present application are further described below with reference to the accompanying drawings and detailed description. Additional aspects and advantages of embodiments of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the embodiments provided herein.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments and, together with the description, serve to explain the principles of the embodiments. In the drawings:

fig. 1 is a schematic diagram of an overall structure of a glass ceramic production line according to an embodiment of the present application, through which a corresponding glass ceramic preparation process can be reflected.

Fig. 2 is a schematic structural diagram of a flue gas treatment device in a raw material drying section in a microcrystalline glass preparation process according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a flue gas treatment device in a raw material pre-reduction section in a glass ceramic preparation process according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a flue gas treatment device in a raw material smelting section in a glass ceramic preparation process according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a flue gas temperature control device in a flue gas dust removal system according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a heat storage element of a medium smoke temperature control device according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a water treatment device in a glass ceramic preparation process according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings. Those of ordinary skill in the art, with the benefit of this disclosure, will be able to implement the embodiments provided herein. Before describing embodiments of the present disclosure with reference to the accompanying drawings, it should be noted in particular that:

the technical solutions and technical features provided in the sections including the following description in the present application may be combined with each other without conflict.

The matter set forth in the following description will generally be presented in the context of a portion of, and not all of, the embodiments disclosed herein, and will be apparent to one of ordinary skill in the art in view of the disclosed embodiments, without undue burden, and without the benefit of the present disclosure.

The terms "comprising," "including," "having," and any variations thereof, in the present specification and claims, and in the related sections, are intended to cover a non-exclusive inclusion. The terms "first," "second," and the like are used for convenience of distinction, and the meaning may be understood in conjunction with a particular arrangement to distinguish between actually indicated objects.

As used herein, "high temperature" refers to temperatures above 180℃and especially above 200 ℃. "high temperature resistant" refers to properties designed for use under the above temperature conditions.

Fig. 1 is a schematic structural diagram of a glass ceramic production line according to an embodiment of the present application. As shown in fig. 1, the glass ceramic production line comprises a raw material drying section 11, a raw material pre-reduction section 12, a raw material smelting section 13, a glass liquid forming section 14, a glass plate annealing section 15, a glass plate crystallization section 16 and a glass ceramic polishing and grinding processing section 17 which are sequentially arranged along the front-back direction of a glass ceramic preparation process line.

Wherein, the raw material drying section 11 is used for carrying out dehydration treatment on the corresponding raw materials through a raw material drying section industrial kiln 11A. In the factory site of the microcrystalline glass production line, main raw materials are often piled up in the open air, and the raw materials are affected with damp due to weather factors such as rain. There are other reasons that may lead to an exceeding of the moisture content of the raw material. The larger water content in the raw materials can cause the increase of energy consumption in the subsequent heating process and have a certain influence on the subsequent treatment. Therefore, the raw material drying section 11 is arranged, corresponding raw materials are dehydrated through the raw material drying section industrial kiln 11A, the raw material drying section industrial kiln 11A is specially arranged for dehydration, the influence of moisture in the raw materials on subsequent treatment can be reduced, and the overall energy consumption of the system is reduced.

The feedstock pre-reduction stage 12 is configured to reduce at least a portion of the components of the feedstock to metal by passing the feedstock pre-reduction stage industrial kiln 12A and pre-reducing the corresponding feedstock with a reducing agent. The raw material pre-reduction section 12 is arranged, and the corresponding raw materials are subjected to pre-reduction treatment by the raw material pre-reduction section industrial kiln 12A and the reducing agent, so that at least part of components in the raw materials are reduced into metal, the coke consumption of the raw material smelting section can be obviously reduced, and the technical and economic indexes of the raw material smelting section are improved. In addition, the nitrogen and sulfur elements in the main mineral raw materials for preparing the glass ceramics can be removed in the raw material pre-reduction section 12 in the form of nitrogen oxides and sulfur dioxide respectively, so that flue gas desulfurization and flue gas denitration can be intensively performed in the raw material pre-reduction section 12, and the investment for desulfurization and denitration in the raw material smelting section 13 can be saved. The raw material prereduction stage industrial kiln 12A may typically be a rotary kiln.

The raw material smelting section 13 is for smelting a mixed raw material containing the pre-reduced raw material by a raw material smelting section industrial kiln 13A to extract a desired molten glass and obtain a by-product formed of the metal. In the raw material smelting section industrial kiln 13A, the mixed raw material containing the pre-reduced raw material is melted by a smelting process to form molten glass, and the molten metal is melted to molten metal, and the molten glass and the molten metal are layered with each other to be extracted separately, and the molten metal is solidified to be used as a by-product. The raw material smelting section industrial kiln 13A generally employs an ore-smelting furnace (electric furnace). In addition, the raw material smelting section 13 often has a multi-stage submerged arc furnace, which can be respectively called a primary microcrystalline furnace and a secondary microcrystalline furnace, and the like, and the core agent required for subsequent crystallization is usually added into the glass liquid in the last stage or several stages of microcrystalline furnaces.

Furthermore, the glass frit molding section 14 is used for molding the glass frit into a glass plate. The glass sheet annealing section 15 is used for annealing the glass sheet. The glass plate crystallization section 16 is used for crystallizing the annealed glass plate to obtain microcrystalline glass. The glass ceramics polishing and grinding processing section 17 is used for polishing and grinding glass ceramics. As is clear from the description of the background section of the present specification, the "molding" may be either calender molding or cast molding. In short, the forming, annealing, crystallization, polishing and grinding are known from the description of the background section of the present specification, and can be understood from, for example, patent document CN106810076a, and the like, and thus are not described in detail herein.

Optionally, the microcrystalline glass preparation process adopts red mud as a main raw material; the raw material drying section 11 is used for dewatering the red mud through the raw material drying section industrial kiln 11A, and the raw material pre-reduction section 12 is used for reducing at least part of iron elements in the red mud into metallic iron through the raw material pre-reduction section industrial kiln 12A and pre-reducing the dewatered red mud by using a reducing agent. The reducing agent used in the feedstock pre-reduction stage 12 may be coke breeze. The mixed raw materials can comprise red mud, coke and magnesia after pre-reduction treatment. The red mud is waste material in aluminum industry, but can be used as a main raw material for preparing microcrystalline glass, so that recycling is realized, and waste is changed into valuable.

The microcrystalline glass production line shown in fig. 1 is more scientific and reasonable in arrangement form and has certain energy-saving advantages. Firstly, the raw material drying section 11 is used for carrying out dehydration treatment on the corresponding raw materials through the raw material drying section industrial kiln, so that the moisture in the main raw materials can be sufficiently reduced, and the increase of the energy consumption in the subsequent heating process caused by the increase of the moisture due to the wetting of the raw materials in a factory and the like is prevented. The raw material pre-reduction section 12 is used for reducing at least part of components in the dehydrated raw material into metal by pre-reduction treatment of the raw material through a raw material pre-reduction section industrial kiln and using a reducing agent, so that the coke consumption of the raw material smelting section can be remarkably reduced, and the technical and economic indexes of the raw material smelting section are improved. The raw material smelting section 13 is for smelting a mixed raw material containing the pre-reduced raw material by a raw material smelting section industrial kiln to extract a desired molten glass and obtain a by-product formed of the metal.

However, the microcrystalline glass production line shown in fig. 1 also has a plurality of pollution discharge points, and the problem of emission reduction still needs to be considered. Specifically: in the raw material drying section 11, the raw material drying section industrial kiln 11A discharges flue gas with higher temperature, and the flue gas contains smoke dust. In the raw material pre-reduction section 12, the raw material pre-reduction section industrial kiln 12A also discharges smoke with higher temperature, and the smoke contains smoke dust; in addition, the flue gas of the raw material pre-reduction stage industrial kiln 12A often also contains nitrogen oxides and sulfur dioxide. In the raw material smelting section 13, a raw material smelting section industrial kiln 13A discharges smoke with higher temperature, and the smoke contains smoke dust and raw gas. In the glass ceramic polishing section 17, a large amount of polishing sewage is discharged.

In addition, the glass-ceramic production line shown in fig. 1 also faces the problems existing in the existing glass-ceramic production process, namely: the cooling water is required to be provided for the ore-smelting furnace (electric furnace) for smelting treatment and the processing water is required to be provided for the polishing work section, and the two paths of water supply are independent of each other and lack of corresponding treatment measures in the past, so that the water consumption is large in the operation process of the glass ceramic production process, and the water cooling system of the ore-smelting furnace is easy to break down due to poor quality of the cooling water.

The following embodiments of the present application will provide a corresponding emission reduction scheme for each pollutant emission point, and make the most of various resources as effectively as possible.

Fig. 2 is a schematic structural diagram of a flue gas treatment device in a raw material drying section in a microcrystalline glass preparation process according to an embodiment of the present application. The flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process is used for solving the problem of emission of atmospheric pollutants of the industrial kiln 11A of the raw material drying section. As shown in fig. 1 and 2, a flue gas treatment device 110 for a raw material drying section in a glass ceramic manufacturing process is used in the raw material drying section 11, and includes: the flue gas filtering device 111 is used for physically intercepting solid particles in flue gas to be filtered through the high-temperature resistant filter material by the flue gas filtering device 111 so as to realize gas-solid separation; the device also comprises an air flow heat exchange device 112, wherein the air flow heat exchange device 112 is used for transferring heat of the heating medium to the heated medium; the flue gas inlet to be filtered of the flue gas filtering device 111 is used for being connected with an exhaust port of the raw material drying section industrial kiln 11A, the filtered flue gas outlet of the flue gas filtering device 111 is used for being connected with a heating medium inlet of the air flow heat exchange device 112, and a heating medium outlet, a heated medium inlet and a heated medium outlet of the air flow heat exchange device 112 are respectively connected with a heating medium discharge end, a heated medium supply end and a combustion-supporting gas inlet of the raw material drying section industrial kiln 11A.

Through setting up fume treatment device 110 in raw materials dry section 11, this fume treatment device 110 includes fume filtration device 111 and air flow heat transfer device 112, wherein, fume filtration device 111 accessible high temperature resistant filter media carries out the physical interception to the solid particulate matter in the higher flue gas of temperature that raw materials dry section industrial kiln discharged, thereby realize gas-solid separation, can ensure dust removal efficiency, can keep the state that the flue gas temperature has been filtered at higher, in this way, air flow heat transfer device 112 just can better utilize the temperature of filtered flue gas to heat heated medium (such as air), heated medium is later as the combustion-supporting gas of raw materials dry section industrial kiln entering raw materials dry section industrial kiln 11A's combustion chamber, promote raw materials dry section industrial kiln 11A thermal efficiency, and the solid particulate matter in the heating medium has been got rid of more abundant, also can not cause atmospheric pollution.

Optionally, in the raw material drying section flue gas treatment device in the microcrystalline glass preparation process, the flue gas filter device 111 is a built-in high temperature resistant filter material, and belongs to a flue gas filter of a metal filter material or a ceramic filter material. The metal filter material and the ceramic filter material are filter materials with better performance in the known high temperature resistant filter material, have longer service life and are relatively suitable for being used in the flue gas filter device 111.

Optionally, in the raw material drying section flue gas treatment device in the glass ceramic preparation process, the air flow heat exchange device 112 adopts a dividing wall type heat exchanger. The dividing wall heat exchanger is a generic name of a type of heat exchanger which ensures that a heating medium and a heated medium do not contact and transfer heat through a heat transfer wall. The specific type and kind of the divided wall type heat exchanger are not limited, and can be specifically selected according to actual situations.

Optionally, in the raw material drying section flue gas treatment device in the glass ceramic preparation process, the dust recovery structure of the flue gas filtering device 111 is connected to the feed inlet of the raw material pre-reduction section industrial kiln 12A through a dust conveying mechanism. Therefore, the dust recovered by the dust recovery structure of the flue gas filter device 111 can be conveyed to the raw material pre-reduction section industrial kiln 12A through the dust conveying mechanism, so that the subsequent treatment of the dust recovered by the flue gas filter device 111 is omitted, and the raw material loss is avoided.

Optionally, in the flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process, the heating medium discharge end is a chimney. When the heating medium discharge end is a chimney, the exhaust emission can be realized through smoke flushing.

Optionally, in the flue gas treatment device of the raw material drying section in the microcrystalline glass preparation process, the heated medium supply end is an external atmosphere. When the heated medium supply end is the external atmosphere, the heated medium is the air in the atmosphere.

Optionally, in the raw material drying section flue gas treatment device in the microcrystalline glass preparation process, a heated medium outlet of the air flow heat exchange device 112 is connected with a combustion-supporting gas inlet of the raw material drying section industrial kiln 12A through a gas mixing pipeline; the gas mixing pipe is connected to both the heated medium outlet and a gas supply source, and the gas of the gas supply source is from the purified gas discharged from the raw material smelting section industrial kiln 13A (stored by the gas tank 133).

Fig. 3 is a schematic structural diagram of a flue gas treatment device in a raw material pre-reduction section in a glass ceramic preparation process according to an embodiment of the present application. The flue gas treatment device of the raw material pre-reduction section in the microcrystalline glass preparation process is used for solving the problem of emission of atmospheric pollutants of the industrial kiln 12A of the raw material pre-reduction section. As shown in fig. 1 and 3, a flue gas treatment device 120 for a pre-reduction stage of raw materials in a glass ceramic manufacturing process is used in the pre-reduction stage 12 of raw materials, and includes: the flue gas filtering device 121, wherein the flue gas filtering device 121 performs physical interception on solid particles in flue gas to be filtered through a high temperature resistant filter material so as to realize gas-solid separation; the device also comprises an air flow heat exchange device 123, wherein the air flow heat exchange device 123 is used for transferring heat of the heating medium to the heated medium; the flue gas inlet to be filtered of the flue gas filtering device 121 is used for being connected with an exhaust port of the raw material pre-reduction section industrial kiln 12A, the filtered flue gas outlet of the flue gas filtering device 121 is used for being connected with a heating medium inlet of the air flow heat exchange device 123, and a heating medium outlet, a heated medium inlet and a heated medium outlet of the air flow heat exchange device 123 are respectively connected with a heating medium discharge end, a heated medium supply end and a combustion-supporting gas inlet of the raw material pre-reduction section industrial kiln 12A.

Through setting up fume treatment device 120 at raw materials prereduction section 12, this fume treatment device 120 includes fume filtration device 121 and air flow heat transfer device 123, wherein, fume filtration device 121 accessible high temperature resistant filter media carries out the physical interception to the solid particulate matter in the higher flue gas of temperature that raw materials prereduction section industrial kiln 12A discharged, thereby realize gas-solid separation, can ensure dust removal efficiency, can keep the temperature of filtered flue gas higher state again, in this way, air flow heat transfer device 123 just can better utilize the temperature of filtered flue gas to heat heated medium (such as air), heated medium later gets into the combustion chamber of raw materials prereduction section industrial kiln 12A as raw materials prereduction section industrial kiln combustion-supporting gas, promote the thermal efficiency of raw materials prereduction section industrial kiln 12A, and the solid particulate matter in the heating medium has been got rid of by comparatively abundant, can not cause atmospheric pollution.

In general, the raw material pre-reduction stage 12 is capable of removing nitrogen and sulfur elements in the main mineral raw materials for preparing glass ceramics as nitrogen oxides and sulfur dioxide, respectively, and therefore, the flue gas of the raw material pre-reduction stage industrial kiln 12A also typically contains nitrogen oxides and sulfur dioxide. In this regard, a flue gas SCR denitration device 122 may be disposed between the filtered flue gas outlet of the flue gas filtration device 121 and the heating medium inlet of the air flow heat exchange device 123 for denitration. Because the activity temperature of the SCR denitration catalyst in the SCR denitration device 122 is higher, and the temperature of the filtered flue gas output by the flue gas filtering device 121 can be kept in a higher state, the temperature of the filtered flue gas can be used to ensure denitration efficiency, and the need for heating the flue gas before the SCR denitration device 122 is reduced, so that energy is saved.

The heating medium discharge end may be a flue gas desulfurization device 124 for desulfurization needs. Since the flue gas desulfurization device 124 is disposed after the air flow heat exchange device 123, it is possible to perform desulfurization after fully utilizing the waste heat of the flue gas through the air flow heat exchange device 123. The main stream flue gas desulfurization device 124 belongs to wet desulfurization, and does not require a higher temperature of the flue gas, which is just favorable for absorbing the flue gas waste heat through the gas flow heat exchange device 123. In addition, when wet desulfurization is adopted, the airflow heat exchange device 123 is also equivalent to a pre-cooling device of the flue gas desulfurization device 124, so that the desulfurization is more complete.

Optionally, in the device for treating flue gas in the raw material pre-reduction section in the glass ceramic preparation process, the flue gas filter device 121 is a built-in high temperature resistant filter material, which belongs to a flue gas filter of a metal filter material or a ceramic filter material. The metal filter material and the ceramic filter material are filter materials with better performance in the known high temperature resistant filter material, have longer service life and are relatively suitable for being used in the flue gas filter device 111.

Optionally, in the flue gas treatment device of the raw material pre-reduction section in the glass ceramic preparation process, the air flow heat exchange device 123 adopts a dividing wall type heat exchanger. The dividing wall heat exchanger is a generic name of a type of heat exchanger which ensures that a heating medium and a heated medium do not contact and transfer heat through a heat transfer wall. The specific type and kind of the divided wall type heat exchanger are not limited, and can be specifically selected according to actual situations.

Optionally, in the flue gas treatment device of the raw material pre-reduction section in the microcrystalline glass preparation process, the heated medium supply end is an external atmosphere. When the heated medium supply end is the external atmosphere, the heated medium is the air in the atmosphere.

Optionally, in the raw material pre-reduction section flue gas treatment device in the glass ceramic preparation process, the heated medium outlet of the air flow heat exchange device 123 is connected with the raw material pre-reduction section industrial kiln combustion-supporting gas inlet through a gas mixing pipeline; the gas mixing pipeline is connected with the heated medium outlet and the gas supply source.

Fig. 4 is a schematic structural diagram of a flue gas treatment device in a raw material smelting section in a glass ceramic preparation process according to an embodiment of the present application. The flue gas treatment device of the raw material smelting section in the microcrystalline glass preparation process is used for solving the problem of emission of atmospheric pollutants of the industrial kiln 13A of the raw material smelting section. Fig. 5 is a schematic structural diagram of a flue gas temperature control device in a flue gas dust removal system according to an embodiment of the present application. Fig. 6 is a schematic structural diagram of a heat storage element of a medium smoke temperature control device according to an embodiment of the present application. As shown in fig. 1 and 4-6, a flue gas treatment device 130 for a raw material smelting section in a glass ceramic manufacturing process is used in the raw material smelting section 13, and includes: the flue gas temperature control device 131, wherein the flue gas temperature control device 131 performs heat transfer with the flue gas passing through a heat storage element 1313 arranged on a flue gas running flow path in the flue gas temperature control device 131 so as to promote the balance of the flue gas temperature output by the flue gas temperature control device 131; the flue gas filter device 132 is further included, the flue gas filter device 132 receives the flue gas output by the flue gas temperature control device 131 and uses the flue gas as flue gas to be filtered, and the flue gas is physically intercepted by the high temperature resistant filter material to realize gas-solid separation; the flue gas inlet of the flue gas temperature control device 131 is used for being connected with the exhaust port of the raw material smelting section industrial kiln 13A, the flue gas outlet of the flue gas temperature control device 131 is used for being connected with the flue gas inlet to be filtered of the flue gas filtering device 132, and the filtered flue gas outlet of the flue gas filtering device 132 is used for being connected with a gas tank 133 or gas using equipment.

In the operation process of the raw material smelting section industrial kiln 13A, especially the submerged arc furnace, the temperature of the high-temperature flue gas discharged by the submerged arc furnace often fluctuates greatly along with the fluctuation of the furnace conditions, and the great fluctuation of the flue gas temperature can influence the normal operation of the flue gas filtering device 132, especially, the great fluctuation of the flue gas temperature not only easily causes the damage of the high-temperature resistant filter material due to the thermal vibration, but also causes the adhesion of liquid separated from the flue gas due to the temperature change on the surface of the high-temperature resistant filter material, so that the filtering capability of the high-temperature resistant Wen Lvcai is obviously reduced, and the normal operation of the flue gas filtering device 132 is influenced. The prior solution measures mainly heat and preserve heat of the flue gas to prevent the flue gas temperature from suddenly dropping. But the heating and heat preservation consumes energy, which is not in accordance with the energy-saving and emission-reducing targets of the application. Therefore, the above-mentioned flue gas temperature control device 131 creatively adopts the heat storage element 1313, and the heat storage element 1313 can absorb heat from flue gas and store heat in the heat storage element 1313 when the flue gas temperature is higher, and when the flue gas temperature is reduced, the heat storage element 1313 can transfer heat to the flue gas to prevent the flue gas temperature from being too low, so that external energy consumption is reduced, and the filtration capability of the high temperature resistant filter material is prevented from being obviously reduced due to the sudden reduction of the flue gas temperature. The heat storage element 1313 not only can prevent the temperature of the flue gas from dropping, but also can reduce the temperature of the high-temperature flue gas by absorbing heat in the flue gas, thus playing a role in promoting the balance of the temperature of the flue gas output by the flue gas temperature control device 131 and effectively solving the problem that the high-temperature resistant filter material is damaged due to thermal vibration.

It should be emphasized that the above-mentioned flue gas temperature control device 131 and the flue gas filtering device 132 are combined to form a dust removal system, and the flue gas temperature control device 131 balances the flue gas temperature in a heat storage manner, so that the flue gas temperature can be prevented from being too high, and the flue gas temperature can be prevented from being too low, so that a very ideal flue gas temperature control means to be filtered is found by using the high Wen Lvcai-resistant flue gas filtering device 132, a technical problem which has not been solved well for a long time in the field of high-temperature flue gas filtering is solved, and the dust removal system is a significant innovation result in the application. Because the flue gas temperature is balanced in a heat storage mode, the dust removal system is not only against the phenomenon of unstable furnace conditions which plague the application of the high-temperature flue gas filtering technology in the past, but also promotes heat storage or heat release due to the fluctuation of the flue gas temperature caused by the unstable furnace conditions, so that the dust removal system finds an ideal solution for dust removal and purification of the flue gas discharged by industrial kilns like submerged arc furnaces.

Optionally, in the raw material smelting section flue gas treatment device in the glass ceramic preparation process, the flue gas filter 132 is a built-in high temperature resistant filter material belonging to a metal filter material or a ceramic filter material. Similarly, the metal filter material and the ceramic filter material are filter materials with better performance in the known high temperature resistant filter material, have longer service life, and are relatively suitable for being used in the flue gas filter device 111.

As shown in fig. 5, in an alternative embodiment, the flue gas temperature control device 131 specifically adopts the following structure: the flue gas temperature control device 131 is provided with a cylindrical shell 1311, an ash bucket 1312 is arranged at the lower part of the cylindrical shell 1311, the heat storage element 1313 is arranged in the cylindrical shell 1311 and is positioned above the ash bucket 1312, the flue gas inlet 1314 of the flue gas temperature control device 131 is arranged at one side of the cylindrical shell 1311 or at the top of the cylindrical shell 1311 and is positioned above the heat storage element 1313, the flue gas outlet 1315 of the flue gas temperature control device 131 is positioned at one side of the ash bucket 1312, a plurality of channels 13131 penetrating in the vertical direction are respectively arranged in the heat storage element 1313, and the channels 13131 penetrating in the vertical direction form the flue gas running flow path.

The flue gas temperature control device 131 with the above structure has at least the following characteristics: first, since the heat storage element 1313 is provided with a plurality of vertically penetrating channels, which constitute the flue gas running flow path, the flue gas flows up and down in the channels of the heat storage element 1313, and solid particles (smoke dust) in the flue gas are easily discharged from the channels of the heat storage element 1313 by gravity or by the combined action of gravity and other external forces, so that the channels of the heat storage element 1313 are not easily blocked. Secondly, since the flue gas inlet 1314 of the flue gas temperature control device 131 is disposed on the side of the cylindrical housing 1311 or on the top of the cylindrical housing 1311 and above the heat storage element 1313, the flue gas outlet 1315 of the flue gas temperature control device 131 is disposed on the side of the ash bucket 1312, so that the flue gas passes through the heat storage element 1313 from top to bottom, i.e. the flue gas flow direction is consistent with the gravity direction, thus further preventing the channel of the heat storage element 1313 from being blocked. In addition, when the flue gas passes through the heat storage element 1313 and then is redirected to the flue gas outlet 1315, the design of changing the flow direction of the flue gas is equivalent to a mechanical dust removing structure, and the mechanical dust removing structure realizes gas-solid separation by mechanical force (gravity, inertial force, centrifugal force or the like of course) acting on solid particles of the flue gas, so that the flue gas is dust removed and purified. In addition, the heat storage element 1313 and the mechanical dust removing structure are arranged up and down, so that the transverse space of the flue gas temperature control device 131 can be saved, and the flue gas temperature control device 131 is arranged on site.

It will be appreciated that the mechanical dust removal structure described above is only one specific embodiment of the flue gas temperature control device 131 of the present application. In other embodiments of the flue gas temperature control device 131 of the present application, the mechanical dust removal structure may be located in front of the heat storage element 1313 along the flue gas flow direction, and the specific structure of the mechanical dust removal structure may also be changed in any possible manner, and even the heat storage element 1313 and the mechanical dust removal structure may also be arranged along the horizontal direction.

On the basis of the flue gas temperature control device 131 shown in fig. 5, a soot blower 1316 is further arranged above the heat storage element 1313 in the cylindrical housing 1311, downward jet heads are arranged on the soot blower 1316, and when in operation, the jet action range of the jet heads on the soot blower 1316 covers the upper ports of the channels penetrating in the up-down direction. The sootblowers 1316 may be arranged in a laterally movable configuration along the cylindrical housing 1311 to increase the range of jet action of the jet heads on the sootblowers 1316. The soot blower 1316 operates in a similar manner to the back-blowing device in the existing filter dust collector by connecting with a gas bag, and compressed gas is introduced into the soot blower 1316 and then blown out of the jet head of the soot blower 1316, thereby dredging the passage of the thermal storage element 1313.

Alternatively, the heat storage element 1313 is assembled by a plurality of heat storage bricks 1313A each made of a heat storage material; a plurality of through holes 13131 for forming the channels are distributed on each of the heat accumulating bricks 1313A. The heat storage material may be selected from existing heat storage materials, such as clay and the like.

Optionally, a heating device may be further disposed in the flue gas temperature control device 131; the heating device may include any one or more of a heating insulating jacket provided on the housing of the smoke temperature control device 131, an electric heater located at the front and/or rear of the heat storage element 1313 in the smoke flow direction in the smoke temperature control device 131, and an electric heater integrated in the heat storage element 1313.

It will be appreciated that the heating device is mainly provided to raise the temperature of the flue gas by the heating device in consideration of the fact that the temperature of the flue gas discharged from the raw material smelting section industrial furnace 13A is low for a long time or the initial temperature of the flue gas discharged from the raw material smelting section industrial furnace 13A is low and the heat storage element 1313 cannot maintain the temperature of the flue gas required by the subsequent flue gas filtering device 132.

As shown in fig. 6, one specific embodiment of the heating device of the flue gas temperature control device 131 of the present application is: the heat storage element 1313 is composed of a plurality of layers of heat storage bricks 1313A stacked up and down and is arranged in the flue gas temperature control device 131 in a vertical mode, an electric heater 1313B with a layered structure is paved between two adjacent layers of heat storage bricks 1313A, the electric heater 1313B with the layered structure can be a ceramic electric heater, and through holes corresponding to the through holes 13131 are arranged in the electric heater 1313B with the layered structure.

As shown in fig. 6, the structural design of laying the electric heater 1313B with a layered structure between two adjacent heat storage bricks 1313A can uniformly heat the heat storage bricks 1313A, so that heat is transferred to the passing smoke by using the heat storage bricks 1313A. In addition, the heating device has a simple structure, saves space, and does not cause difficulty in designing the flue gas temperature control device 131.

Fig. 7 is a schematic structural diagram of a water treatment device in a glass ceramic preparation process according to an embodiment of the present application. The water treatment device in the microcrystalline glass preparation process is used for solving the problem that a large amount of polishing sewage is discharged from the microcrystalline glass polishing processing section 17. As shown in fig. 1 and 7, a water treatment device 140 in a glass ceramic manufacturing process includes: a membrane filter 141, wherein the membrane filter 141 performs solid-liquid separation purification with a filtration accuracy of a nanofiltration level or more on water to be purified by a membrane filter element; the water circulation device comprises a water circulation loop 142 and a sewage purification device 143 positioned on the water circulation loop 142, wherein the water circulation loop 142 is sequentially provided with a purified water receiving end A, a purified water supply end B and a sewage recovery end C, and the sewage purification device 143 is positioned between the sewage recovery end C and the purified water supply end B; the water purification output end of the membrane filter device 141 is used for providing cooling water for the raw material smelting section industrial kiln 13A, the concentrated water output end of the membrane filter device 141 is used for being connected with the water purification receiving end a on the water circulation loop 142, the water purification supply end B on the water circulation loop 142 is used for providing polishing water for the glass ceramic polishing section 17, and the sewage recovery end C on the water circulation loop 142 is used for recovering polishing sewage generated by the glass ceramic polishing section 17.

In addition, the water treatment apparatus 140 may further include a sewage concentration apparatus 144, and a sewage inlet of the sewage concentration apparatus 144 to be concentrated is connected to a sewage discharge end of the sewage purification apparatus 143. The sewage concentration device 143 may include a filter press. Alternatively, the water inlet to be purified of the membrane filter device 141 may be connected to a tap water source.

The membrane filter 141 performs solid-liquid separation purification with the filtering precision of more than the nanofiltration level on water to be purified through the membrane filter element, namely, the membrane filter 141 can realize nanofiltration or reverse osmosis, so that the purified water output end of the membrane filter 141 can output high-purity cooling water, thereby preventing the problem of failure of a submerged arc furnace water cooling system caused by poor quality of the cooling water. Since the water quality requirement of the polishing water required by the glass ceramic polishing section 17 is not too high, the water output from the concentrated water output end of the membrane filter 141 is used as polishing water and is supplied to the glass ceramic polishing section 17 through the purified water supply end B on the water circulation loop 142. The sewage recovery end C of the water circulation loop 142 can recover the polishing sewage generated by the glass ceramic polishing section 17, and then the polishing sewage is recovered to the sewage purifying device 143 through the water circulation loop 142. The sewage purification device 143 can purify the polishing sewage by various feasible sewage treatment measures, such as membrane filtration, physical clarification, chemical clarification and the like, the purified water is recycled to the polishing section 17, and the concentrated water generated during purification can enter the sewage concentration device 143 for concentration treatment.

The water treatment device 140 in the glass ceramic preparation process combines two paths of water supply which originally provides cooling water for the submerged arc furnace (electric furnace) for smelting treatment and provides processing water for the polishing and grinding work section 17, and solves the problems that a submerged arc furnace water cooling system is easy to break down, polishing and grinding processing sewage cannot be effectively recycled and the like.

The above description is made regarding the contents of the embodiments provided in the present application. Those of ordinary skill in the art, with the benefit of this disclosure, will be able to implement the embodiments provided herein. Based on the foregoing provided herein, all other embodiments that would be obtained by one of ordinary skill in the art without making any inventive effort should fall within the scope of the related utility models/inventive protection provided herein.

Claims (8)

1. The flue gas treatment device for a raw material drying section in a microcrystalline glass preparation process is used for a raw material drying section in a microcrystalline glass production line, wherein the microcrystalline glass production line comprises a raw material drying section, a raw material pre-reduction section and a raw material smelting section, the raw material drying section comprises a raw material drying section industrial kiln, the raw material pre-reduction section comprises a raw material pre-reduction section industrial kiln, and the raw material smelting section comprises a raw material smelting section industrial kiln; characterized by comprising the following steps: the flue gas filtering device is used for physically intercepting solid particles in flue gas to be filtered through the high-temperature resistant filter material so as to realize gas-solid separation; the device also comprises an air flow heat exchange device, wherein the air flow heat exchange device is used for transferring the heat of the heating medium to the heated medium; the flue gas inlet to be filtered of the flue gas filtering device is used for being connected with an exhaust port of the raw material drying section industrial kiln, the filtered flue gas outlet of the flue gas filtering device is used for being connected with a heating medium inlet of the air flow heat exchange device, and a heating medium outlet, a heated medium inlet and a heated medium outlet of the air flow heat exchange device are respectively connected with a heating medium discharge end, a heated medium supply end and a combustion-supporting gas inlet of the raw material drying section industrial kiln.

2. The flue gas treatment device for a raw material drying section in a microcrystalline glass preparation process according to claim 1, wherein: the smoke filter device is a built-in high temperature resistant filter material, and belongs to a smoke filter of a metal filter material or a ceramic filter material.

3. The flue gas treatment device for a raw material drying section in a microcrystalline glass preparation process according to claim 1, wherein: the air flow heat exchange device adopts a dividing wall type heat exchanger.

4. The flue gas treatment device for a raw material drying section in a microcrystalline glass preparation process according to claim 1, wherein: the dust recovery structure of the flue gas filtering device is connected to the feed inlet of the raw material pre-reduction section industrial kiln through a dust conveying mechanism.

5. The flue gas treatment device for a raw material drying section in a microcrystalline glass preparation process according to claim 1, wherein: the heating medium discharge end is a chimney.

6. The flue gas treatment device for a raw material drying section in a microcrystalline glass preparation process according to claim 1, wherein: the heated medium supply end is an external atmosphere environment.

7. The flue gas treatment device for a raw material drying section in a microcrystalline glass preparation process according to claim 6, wherein: the heated medium outlet of the air flow heat exchange device is connected with the combustion-supporting gas inlet of the raw material drying section industrial kiln through a gas mixing pipeline; the gas mixing pipeline is connected with the heated medium outlet and a gas supply source, and the gas of the gas supply source is the gas discharged from the industrial kiln of the raw material smelting section and purified.

8. A raw material drying section flue gas treatment device in a glass ceramic manufacturing process according to any one of claims 1 to 7, wherein: the raw material drying section industrial kiln adopts a drying kiln and/or the raw material pre-reduction section industrial kiln adopts a rotary kiln and/or the raw material smelting section industrial kiln adopts an ore-smelting furnace.