阅读说明：本技术 石英砂漂白系统及漂白工艺 (Quartz sand bleaching system and bleaching process ) 是由 余政纲 代翔潇 郭永刚 何志平 孙智 周峰 胡唐辉 邵升 于 2020-07-03 设计创作，主要内容包括：本发明提供一种石英砂漂白系统及漂白工艺,该石英砂漂白系统包括如下模块：原料准备与喂料子系统,用于向煅烧炉定量、稳定供应混合料；煅烧及冷却子系统,用于对物料机型预热煅烧及冷却；烟气治理子系统,用于对烟气进行治理。该石英砂漂白系统及漂白工艺具有的优点如下：(1)该石英砂漂白系统及漂白工艺不使用水,避免了水资源浪费；(2)该石英砂漂白系统及漂白工艺不使用酸碱,避免了可能造成的环境污染；(3)该石英砂漂白系统及漂白工艺采用回转窑和冷却机,适合大规模连续生产,具有较高的生产效率；(4)该石英砂漂白系统及漂白工艺采用连续式生产的方式避免了物料及能源的浪费。(The invention provides a quartz sand bleaching system and a bleaching process, wherein the quartz sand bleaching system comprises the following modules: the raw material preparation and feeding subsystem is used for quantitatively and stably supplying a mixture to the calcining furnace; the calcining and cooling subsystem is used for preheating, calcining and cooling the material machine type; and the flue gas treatment subsystem is used for treating the flue gas. The quartz sand bleaching system and the bleaching process have the advantages that: (1) the quartz sand bleaching system and the bleaching process do not use water, so that the waste of water resources is avoided; (2) the quartz sand bleaching system and the bleaching process do not use acid or alkali, so that the possible environmental pollution is avoided; (3) the quartz sand bleaching system and the bleaching process adopt the rotary kiln and the cooler, are suitable for large-scale continuous production and have higher production efficiency; (4) the quartz sand bleaching system and the bleaching process adopt a continuous production mode to avoid waste of materials and energy.)

1. A quartz sand bleaching system is characterized by comprising the following modules:

the raw material preparation and feeding subsystem is used for quantitatively and stably supplying a mixture to the calcining furnace;

the calcining and cooling subsystem is used for preheating, calcining and cooling the material machine type;

and the flue gas treatment subsystem is used for treating the flue gas.

2. The quartz sand bleaching system of claim 1, wherein: the raw material preparing and feeding subsystem comprises a roller press, a V-shaped powder concentrator, a cyclone dust collector, a raw material bin, a cloth bag dust collector and a metering scale;

the roller press is used for rolling the mixed quartz sand and the bleaching agent;

the V-shaped powder concentrator is used for separating quartz sand and bleaching agent which are rolled by a roller press;

The cyclone dust collector is used for collecting the raw materials with the particle size less than 1mm after being sorted by the V-shaped powder concentrator;

the raw material bin is used for loading the raw materials;

the cloth bag dust collector is used for purifying the smoke led out by the cyclone dust collector and discharging the smoke reaching the standard into the atmosphere;

the metering scale is used for metering and weighing the raw meal in the raw meal bin, and the metering scale is arranged at the bottom of the raw meal bin.

3. The quartz sand bleaching system of claim 1, wherein: the device also comprises a kiln conveying device used for conveying the raw materials into the kiln after the raw materials are weighed by the weighing scale.

4. The quartz sand bleaching system of claim 1, wherein: the calcining and cooling subsystem comprises a rotary kiln, a cooler, a natural gas burner, warehousing conveying equipment and a storage bin;

the rotary kiln is used for calcining and bleaching the raw materials conveyed in the raw material bin;

the cooler is used for cooling the material calcined and bleached by the rotary kiln;

the warehousing conveying equipment is used for conveying the material cooled by the cooler to a storage bin;

the storage bin is used for storing the processed finished products.

5. The quartz sand bleaching system of claim 1, wherein: and the dust raising points are provided with flue gas dust removal pipelines for treating dust.

6. The quartz sand bleaching system of claim 5, wherein: the flue gas dust removal pipeline is internally subjected to corrosion and wear resistant treatment, so that the corrosion and wear of the flue gas to the inside of the pipeline are avoided.

7. A quartz sand bleaching process is characterized by comprising the following steps:

s1: rolling the mixed quartz sand and the bleaching agent by using a roller press;

s2: guiding the ground quartz sand and bleaching agent into a V-shaped powder concentrator for separation;

s3: collecting the raw materials with the particle size of less than 1mm sorted by the V-shaped powder sorter by using a cyclone dust collector, and conveying the raw materials into a raw material bin by using a chain conveyor;

s4: purifying the smoke led out by the cyclone dust collector by using a cloth bag dust collector and discharging the smoke reaching the standard into the atmosphere;

s5: weighing raw materials in a raw material bin by a weighing scale, and conveying the raw materials into a rotary kiln by conveying equipment;

s6: the raw material is discharged from the kiln head after being calcined and bleached after entering the rotary kiln and then enters a cooling machine for cooling;

s7: the material is conveyed to a storage bin for storage through conveying equipment after being cooled.

8. The quartz sand bleaching process according to claim 7, further comprising the steps of:

s8: the kiln tail smoke enters a V-shaped powder concentrator, a cyclone dust collector and a cloth bag dust collector to be purified and then is discharged into the atmosphere.

9. The quartz sand bleaching process according to claim 7, wherein:

the mixture of the quartz sand and the bleaching agent in the step S1 contains 95-99% of quartz sand and 1-5% of bleaching agent;

the calcining temperature in the rotary kiln is 1200-1300 ℃, and the calcining time is 60-90 minutes;

the temperature of the cooled material in the step S7 is less than 120 ℃.

Technical Field

The invention particularly relates to a quartz sand bleaching system and a bleaching process.

Background

Quartz is widely used in the industries of ceramics, glass, metallurgy, construction, chemical industry, machinery, electronics, rubber and plastics, coatings, aerospace, jewelry and the like, and is an industrial raw material with wide application. The quartz sand can be classified into common quartz sand, refined quartz sand, high-purity quartz sand and fused quartz sand according to quality. The domestic natural quartz sand is generally common quartz sand, and the refined quartz sand can be prepared by bleaching and purifying because of high impurity content.

Currently, there are three processes for quartz bleaching: leaching method, chemical bleaching method, and calcining method. The leaching method and the chemical bleaching method have the disadvantages of large water consumption, large amount of acid, great environmental pollution and low yield per unit time. The calcining method has high energy consumption, intermittent production and low yield per unit time.

In view of the above, there is an urgent need for a quartz sand bleaching system and process with more resource saving and lower comprehensive production cost.

Disclosure of Invention

The invention aims to provide a quartz sand bleaching system and a bleaching process aiming at the defects of the prior art, and the quartz sand bleaching system and the bleaching process can well solve the problems.

In order to meet the requirements, the technical scheme adopted by the invention is as follows: the quartz sand bleaching system comprises the following modules:

the raw material preparation and feeding subsystem is used for quantitatively and stably supplying a mixture to the calcining furnace;

the calcining and cooling subsystem is used for preheating, calcining and cooling the material machine type;

and the flue gas treatment subsystem is used for treating the flue gas.

The bleaching process comprises the following steps:

s1: rolling the mixed quartz sand and the bleaching agent by using a roller press;

S2: guiding the ground quartz sand and bleaching agent into a V-shaped powder concentrator for separation;

s3: collecting the raw materials with the particle size of less than 1mm sorted by the V-shaped powder sorter by using a cyclone dust collector, and conveying the raw materials into a raw material bin by using a chain conveyor;

s4: purifying the smoke led out by the cyclone dust collector by using a cloth bag dust collector and discharging the smoke reaching the standard into the atmosphere;

s5: weighing raw materials in a raw material bin by a weighing scale, and conveying the raw materials into a rotary kiln by conveying equipment;

s6: the raw material is discharged from the kiln head after being calcined and bleached after entering the rotary kiln and then enters a cooling machine for cooling;

s7: the material is conveyed to a storage bin for storage through conveying equipment after being cooled.

The quartz sand bleaching system and the bleaching process have the advantages that:

(1) the quartz sand bleaching system and the bleaching process do not use water, so that the waste of water resources is avoided;

(2) the quartz sand bleaching system and the bleaching process do not use acid or alkali, so that the possible environmental pollution is avoided;

(3) the quartz sand bleaching system and the bleaching process adopt the rotary kiln and the cooler, are suitable for large-scale continuous production and have higher production efficiency;

(4) the quartz sand bleaching system and the bleaching process adopt a continuous production mode to avoid waste of materials and energy.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 schematically illustrates a schematic structural diagram of a quartz sand bleaching system according to one embodiment of the present application.

FIG. 2 schematically illustrates a flow diagram of a quartz sand bleaching process according to one embodiment of the present application.

Wherein: 1. a weighing bin; 2. a roll squeezer; 3. a hoist; 4. a V-shaped powder concentrator; 5. a second hoist; 6. a cyclone dust collector; 7. a bag dust collector; 8. a centrifugal fan; 9. a chain conveyor; 10. a third hoisting machine; 11. a raw material warehouse; 12. a second bag collector; 13. a second centrifugal fan; 14. a manual gate valve; 15. a scale; 16. a conveyor; 17. a rotary kiln; 18. a natural gas burner; 19. a cooling machine; 20. a second conveyor; 21. a fourth hoist; 22. a finished product warehouse; 23. a second bag collector; 24. a third centrifugal fan; 25. an air cooler; 26. a fourth centrifugal fan; 27. a first electric butterfly valve; 28. a second electric butterfly valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the following description, references to "one embodiment," "an embodiment," "one example," "an example," etc., indicate that the embodiment or example so described may include a particular feature, structure, characteristic, property, element, or limitation, but every embodiment or example does not necessarily include the particular feature, structure, characteristic, property, element, or limitation. Moreover, repeated use of the phrase "in accordance with an embodiment of the present application" although it may possibly refer to the same embodiment, does not necessarily refer to the same embodiment.

Certain features that are well known to those skilled in the art have been omitted from the following description for the sake of simplicity.

According to an embodiment of the present application, there is provided a quartz sand bleaching system, as shown in fig. 1, comprising the following modules: the raw material preparation and feeding subsystem is used for quantitatively and stably supplying a mixture to the calcining furnace; the calcining and cooling subsystem is used for preheating, calcining and cooling the material machine type; and the flue gas treatment subsystem is used for treating the flue gas.

According to one embodiment of the application, the raw material preparation and feeding subsystem of the quartz sand bleaching system comprises a roller press 2, a V-shaped powder concentrator 4, a cyclone dust collector 6, a raw material bin 11, a cloth bag dust collector 7 and a metering scale 15; the roller press 2 is used for rolling the mixed quartz sand and the bleaching agent; the V-shaped powder concentrator 4 is used for separating the quartz sand and the bleaching agent which are rolled by the roller press 2; the cyclone dust collector 6 is used for collecting the raw materials with the size less than 1mm after being sorted by the V-shaped powder sorter 4; the raw material bin 11 is used for loading the raw materials; the cloth bag dust collector 7 is used for purifying the smoke led out by the cyclone dust collector 6 and discharging the smoke reaching the standard into the atmosphere. The metering scale 15 is used for metering and weighing the raw meal in the raw meal bin, and the metering scale 15 is arranged at the bottom of the raw meal bin 11.

According to one embodiment of the present application, the quartz sand bleaching system further comprises a kiln feeding device for feeding the raw meal into the kiln after it has been weighed by the weigher 15.

According to one embodiment of the application, the calcining and cooling subsystem of the quartz sand bleaching system comprises a rotary kiln 17, a cooler 19, a natural gas burner 18, a warehousing conveying device 20 and a storage bin 22; the rotary kiln 17 is used for calcining and bleaching the raw meal conveyed into the raw meal bin 11; the cooler 19 is used for cooling the material calcined and bleached by the rotary kiln 17; the warehousing conveying equipment 20 is used for conveying the materials cooled by the cooler 19 to a storage bin; the silo 22 is used to store the finished product after processing.

According to one embodiment of the application, the quartz sand bleaching system is provided with a flue gas dedusting pipeline for treating dust at a dust raising point.

According to an embodiment of the application, the flue gas dedusting pipeline of the quartz sand bleaching system is internally subjected to anticorrosion and wear-resistant treatment, so that the corrosion and wear of the flue gas to the inside of the pipeline are avoided.

According to one embodiment of the present application, the quartz sand bleaching system comprises the following components as shown in FIG. 1: the device comprises a weighing bin 1, a roller press 2, a lifting machine 3, a V-shaped powder concentrator 4, a second lifting machine 5, a cyclone dust collector 6, a bag dust collector 7, a centrifugal fan 8, a chain conveyor 9, a third lifting machine 10, a raw material storage 11, a second bag dust collector 12, a second centrifugal fan 13, a manual gate valve 14, a metering scale 15, a conveyor 16, a rotary kiln 17, a natural gas combustor 18, a cooling machine 19, a second conveyor 20, a fourth lifting machine 21, a finished product storage 22, a second bag dust collector 23, a third centrifugal fan 24, an air cooler 25, a fourth centrifugal fan 26, a first electric butterfly valve 27 and a second electric butterfly valve 28.

According to one embodiment of the present application, the quartz sand bleaching process comprises the steps of:

s1: rolling the mixed quartz sand and the bleaching agent by using a roller press 2;

S2: guiding the ground quartz sand and bleaching agent into a V-shaped powder concentrator 4 for sorting;

s3: collecting the raw materials with the diameter less than 1mm after being sorted by the V-shaped powder sorter 4 by using a cyclone dust collector 6, and then conveying the raw materials into a raw material bin by using a chain conveyor;

s4: the flue gas led out by the cyclone dust collector 6 is purified by a cloth bag dust collector 7 and the flue gas reaching the standard is discharged into the atmosphere;

s5: weighing raw materials in a raw material bin by a weighing scale, and conveying the raw materials into a rotary kiln by conveying equipment;

s6: the raw material is discharged from the kiln head after being calcined and bleached after entering the rotary kiln and then enters a cooling machine for cooling;

s7: the material is conveyed to a storage bin for storage through conveying equipment after being cooled.

According to one embodiment of the present application, the quartz sand bleaching process further comprises the steps of:

s8: the kiln tail smoke enters a V-shaped powder concentrator, a cyclone dust collector and a cloth bag dust collector to be purified and then is discharged into the atmosphere.

According to an embodiment of the application, the mixture of the post-quartz sand and the bleaching agent in the step S1 of the quartz sand bleaching process contains 95% -99% of quartz sand and 1% -5% of bleaching agent; the calcination temperature in the rotary kiln is 1200-1300 ℃, and the calcination time is 60-90 minutes.

According to one embodiment of the present application, the temperature of the cooled material in step S7 of the quartz sand bleaching process is less than 120 ℃.

According to one embodiment of the present application, the quartz sand bleaching system includes a raw material preparation and feed subsystem, a calcination and cooling subsystem, and a finished product storage subsystem. The raw material preparation and feeding subsystem comprises 95% -99% of quartz sand and 1% -5% of bleaching agent mixture, the mixture is conveyed to a V-shaped powder concentrator 4 through a lifting machine 3, the mixture is lifted to a weighing bin 1 through a second lifting machine 5 after being dried by hot air, the mixture is fed into a roller press 2 from the weighing bin 1, the mixture returns to the V-shaped powder concentrator 4 through the second lifting machine 5 after being rolled, the fineness of the rolled quartz sand can be adjusted by adjusting the pressure of the roller press and the air volume of the V-shaped powder concentrator, 80-100-mesh quartz sand materials enter a cyclone dust collector 6 along with flue gas, and the collected materials are conveyed to a raw material warehouse 11 through a chain conveyor 9 to be stored. The flue gas out of the cyclone dust collector 6 enters a bag dust collector 7 again, the residual dust in the flue gas is conveyed into a raw material warehouse 11 through a chain conveyor 9 after being collected, and the purified air is discharged into the atmosphere through a centrifugal fan 8.

According to one embodiment of the application, a calcining and cooling subsystem of the quartz sand bleaching system comprises a rotary kiln 17, a natural gas combustor 18 and a cooler 19, after a mixture is fed into the kiln, the rotary kiln is subjected to high-temperature calcining at 1200-1300 ℃, at high temperature, coloring metal ions in bleaching agent quartz sand react to generate volatile gas, the volatile gas is discharged from the tail of the kiln, the temperature of kiln tail flue gas is higher than 400 ℃, the high-temperature flue gas is cooled to 200 ℃ through an air cooler 25, volatile substances are condensed and separated out from the flue gas, the flue gas discharged from the cooler enters a V-shaped powder concentrator to be used as drying flue gas, if a roller press is stopped, the first electric butterfly valve 27 is closed, the second electric butterfly valve 28 is opened, and the flue gas enters a dust collector 7 to be purified and then is discharged. After the calcining time of the quartz and bleaching agent mixture in the kiln is about 60-90 minutes, the residence time of the materials in the kiln can be adjusted through variable frequency speed regulation by the rotary kiln, the materials are discharged from the kiln head, enter a cooler 19, are cooled to be below 120 ℃, and are conveyed into a finished product warehouse 22 through conveying equipment for storage.

The above-mentioned embodiments only show some embodiments of the present invention, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the claims.