CN111992331A - Continuous pickling production method and production equipment for quartz sand - Google Patents
Continuous pickling production method and production equipment for quartz sand Download PDFInfo
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- CN111992331A CN111992331A CN202010904440.5A CN202010904440A CN111992331A CN 111992331 A CN111992331 A CN 111992331A CN 202010904440 A CN202010904440 A CN 202010904440A CN 111992331 A CN111992331 A CN 111992331A
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- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Abstract
The invention discloses a continuous pickling production method and continuous pickling production equipment for quartz sand, wherein the method comprises the following steps of: adding quartz sand raw materials into a current fluidized bed reaction tank in sequence, and adding acid liquid recovered from the previous fluidized bed reaction tank into the current fluidized bed reaction tank; in the acid washing reaction process, heating the acid liquor overflowing from the top of the current fluidized bed reaction tank by a heat exchanger, and then sending back from the bottom of the current fluidized bed reaction tank; after the acid washing reaction is finished, carrying out vacuum deacidification and recovery; opening a discharge valve at the bottom of the fluidized bed reaction tank to discharge the mortar; then sending the mortar into a desliming bucket for primary cleaning, and discharging the generated sewage into a water treatment system; flowing the mortar into a sand washer for secondary cleaning, and sending the generated sewage to a water treatment system; and (4) placing the mortar subjected to the second cleaning into a vacuum filter for dehydration, and then outputting the dehydrated mortar through a belt conveyor. The invention realizes continuous production and improves the pickling efficiency and yield.
Description
Technical Field
The invention relates to the technical field of non-metallic ore purification, in particular to a continuous pickling production method and continuous pickling production equipment for quartz sand.
Background
The existing pickling process is mainly based on carriers such as a pickling tank or a pickling tank, and is used for soaking by using acid liquor such as hydrochloric acid, fluosilicic acid, nitric acid, oxalic acid and the like, and heating or non-heating is carried out at the same time. However, the existing pickling method has incomplete acid liquor recovery and waste acid treatment, increases pickling time and cost, and causes pollution to the environment to different degrees.
In addition, the existing pickling process has the problem that the pickling tanks, the quartz sand cleaning tanks and other equipment are in one-to-one correspondence and respectively form a set of pickling system, so that pickling auxiliary equipment cannot be fully utilized, and great waste is caused.
In addition, the pickling production line in the prior art is limited by the process and cannot be produced in a large scale; or a large amount of accessory equipment is idle in the production process, and the material waiting condition exists.
Disclosure of Invention
The invention aims to provide a continuous pickling production method and continuous pickling production equipment for quartz sand, and aims to solve the problems of low efficiency, low equipment utilization rate and high cost of the existing pickling production method.
In a first aspect, an embodiment of the present invention provides a continuous acid washing production method for quartz sand, which includes;
adding quartz sand raw materials into a current fluidized bed reaction tank in sequence by utilizing conveying equipment, and adding acid liquid recovered from the previous fluidized bed reaction tank into the current fluidized bed reaction tank through an acid-resistant pump for acid washing reaction; in the acid washing reaction process, heating the acid liquor overflowing from the top of the current fluidized bed reaction tank by using an acid liquor circulating pump through a heat exchanger, and then sending the heated acid liquor back to the current fluidized bed reaction tank from the bottom of the current fluidized bed reaction tank;
after the acid washing reaction is finished, discharging acid liquor through a filtering device at the bottom of the current fluidized bed reaction tank, performing vacuum deacidification recovery, and conveying the recovered acid liquor to the next fluidized bed reaction tank for continuous use;
adding circulating water into the current fluidized bed reaction tank, and opening a discharge valve at the bottom of the fluidized bed reaction tank to discharge the mortar; then, the mortar is sent into a mud removing hopper by a slurry pump for primary cleaning, and sewage generated by the primary cleaning is discharged into a water treatment system for recycling; the mortar flows into a sand washer at the lower part of the desliming bucket for secondary cleaning, and sewage generated by the secondary cleaning is sent to a water treatment system for recycling; and (4) placing the mortar subjected to the second cleaning into a vacuum filter for dehydration, and then outputting the dehydrated mortar through a belt conveyor.
Preferably, the method further comprises the following steps:
mixing the sewage generated by the first cleaning and the sewage generated by the second cleaning in a homogenizing pool in the water treatment system.
Preferably, the method further comprises the following steps:
sending the mixed sewage into a thickening tank in a water treatment system, and adding a fluorine ion treatment agent and a flocculating agent to flocculate and precipitate the sewage in the thickening tank;
and (3) enabling the supernatant in the thickening tank to flow into a circulating water tank for continuous recycling, and pumping the precipitate in the thickening tank into a plate-and-frame filter press by using a tank bottom pump for filtering to obtain a filter cake.
Preferably, the method further comprises the following steps:
and after deacidification is finished, adding clear water into the current fluidized bed reaction tank, then discharging acid liquor again, performing vacuum deacidification recovery, and finishing primary cleaning.
Preferably, the amount of the clean water added is equal to the amount of the acid liquid discharged.
Preferably, the acid solution recovered from the previous fluidized bed reaction tank is added into the current fluidized bed reaction tank through an acid-proof pump to perform an acid washing reaction, and the acid washing reaction comprises:
adding new acid liquor into the acid liquor recovered from the last fluidized bed reaction tank to ensure that the proportion of each component of the recovered acid liquor reaches the preset requirement.
Preferably, the method further comprises the following steps:
and recovering hot water generated after heat exchange of the heat exchanger, and configuring acid liquor by using the hot water.
Preferably, the first cleaning of the mortar sent into the desliming bucket by the slurry pump comprises the following steps:
the water inflow is controlled through a valve at the bottom of the desliming bucket, so that the complex floats out and overflows, and meanwhile, the mortar sinks based on the self weight, and the first cleaning is completed.
Preferably, the step of dewatering the mortar after the second cleaning in a vacuum filter and then outputting the dewatered mortar through a belt conveyor comprises the following steps:
and (3) placing the mortar subjected to the secondary cleaning into a vacuum filter for dehydration to reduce the mass percent of water in the mortar to below 8%, and then outputting the mortar through a belt conveyor.
In a second aspect, an embodiment of the present invention provides a continuous pickling production apparatus for quartz sand, including:
the current fluidized bed reaction tank is used for providing quartz sand raw materials for acid washing reaction; a filtering device and a discharge valve are arranged at the bottom of the current fluidized bed reaction tank;
the conveying equipment is arranged above the current fluidized bed reaction tank and is used for sequentially adding the quartz sand raw materials into the current fluidized bed reaction tank;
the acid-resistant pump is connected with the current fluidized bed reaction tank and is used for adding the acid liquid recovered from the previous fluidized bed reaction tank into the current fluidized bed reaction tank for acid washing reaction;
the heat exchanger is used for heating the acid liquor;
the acid liquor circulating pump is connected with the heat exchanger and used for heating the acid liquor overflowing from the top of the current fluidized bed reaction tank through the heat exchanger in the acid washing reaction process and then sending the heated acid liquor back to the current fluidized bed reaction tank from the bottom of the current fluidized bed reaction tank;
the filtering device is connected with the vacuum tank group and is used for discharging acid liquor after the acid washing reaction is finished;
the vacuum tank group is connected with the current fluidized bed reaction tank, is used for carrying out vacuum deacidification recovery on the discharged acid liquid, and conveys the recovered acid liquid to the next fluidized bed reaction tank for continuous use;
the discharge valve is used for discharging the mortar in the current fluidized bed reaction tank after the circulating water is added into the current fluidized bed reaction tank;
the slurry pump is connected with the desliming hopper and the discharge valve and is used for sending the discharged mortar into the desliming hopper;
the sand washing system comprises a sand washing machine, a water treatment system, a mud removing hopper, a sand washing machine and a mud washing machine, wherein the sand washing machine is connected with the water treatment system;
the water treatment system is used for recycling the sewage;
the sand washer is connected with the water treatment system and used for carrying out secondary cleaning on the mortar and sending sewage generated by the secondary cleaning to the water treatment system;
and the vacuum filter is connected with the sand washer and used for dehydrating the mortar after the secondary cleaning and then outputting the mortar through a belt conveyor.
The embodiment of the invention provides a continuous acid washing production method and continuous acid washing production equipment for quartz sand, wherein the production method comprises the following steps: adding quartz sand raw materials into a current fluidized bed reaction tank in sequence by utilizing conveying equipment, and adding acid liquid recovered from the previous fluidized bed reaction tank into the current fluidized bed reaction tank through an acid-resistant pump for acid washing reaction; in the acid washing reaction process, heating the acid liquor overflowing from the top of the current fluidized bed reaction tank by using an acid liquor circulating pump through a heat exchanger, and then sending the heated acid liquor back to the current fluidized bed reaction tank from the bottom of the current fluidized bed reaction tank; after the acid washing reaction is finished, discharging acid liquor through a filtering device at the bottom of the current fluidized bed reaction tank, performing vacuum deacidification recovery, and conveying the recovered acid liquor to the next fluidized bed reaction tank for continuous use; adding circulating water into the current fluidized bed reaction tank, and opening a discharge valve at the bottom of the fluidized bed reaction tank to discharge the mortar; then, the mortar is sent into a mud removing hopper by a slurry pump for primary cleaning, and sewage generated by the primary cleaning is discharged into a water treatment system for recycling; the mortar flows into a sand washer at the lower part of the desliming bucket for secondary cleaning, and sewage generated by the secondary cleaning is sent to a water treatment system for recycling; and (4) placing the mortar subjected to the second cleaning into a vacuum filter for dehydration, and then outputting the dehydrated mortar through a belt conveyor. The embodiment of the invention integrally arranges a plurality of working procedures required by each fluidized bed reaction tank: feeding, acid feeding, heating, stirring, deacidifying, discharging and cleaning, and ensuring that key processes are not conflicted, thereby realizing continuous production. Meanwhile, the quartz sand can have enough reaction time in the fluidized bed reaction tank, and the acid washing efficiency and the yield are greatly improved.
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 description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a continuous pickling production method for quartz sand according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a continuous pickling production apparatus for quartz sand according to an embodiment of the present invention.
Detailed Description
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, not all, embodiments of the present 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 will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a schematic flow chart of a continuous acid washing production method for quartz sand according to an embodiment of the present invention, including steps S101 to S103:
s101, adding quartz sand raw materials into a current fluidized bed reaction tank in sequence by utilizing conveying equipment, and adding acid liquid recovered from the previous fluidized bed reaction tank into the current fluidized bed reaction tank through an acid-resistant pump for acid washing reaction; in the acid washing reaction process, heating the acid liquor overflowing from the top of the current fluidized bed reaction tank by using an acid liquor circulating pump through a heat exchanger, and then sending the heated acid liquor back to the current fluidized bed reaction tank from the bottom of the current fluidized bed reaction tank;
s102, after the acid washing reaction is finished, discharging acid liquor through a filtering device at the bottom of the current fluidized bed reaction tank, performing vacuum deacidification recovery, and conveying the recovered acid liquor to the next fluidized bed reaction tank for continuous use;
s103, adding circulating water into the current fluidized bed reaction tank, and opening a discharge valve at the bottom of the fluidized bed reaction tank to discharge the mortar; then, the mortar is sent into a mud removing hopper by a slurry pump for primary cleaning, and sewage generated by the primary cleaning is discharged into a water treatment system for recycling; the mortar flows into a sand washer at the lower part of the desliming bucket for secondary cleaning, and sewage generated by the secondary cleaning is sent to a water treatment system for recycling; and (4) placing the mortar subjected to the second cleaning into a vacuum filter for dehydration, and then outputting the dehydrated mortar through a belt conveyor.
Referring to fig. 2, in the step S101, quartz sand raw materials are sequentially added to the current fluidized-bed reaction tank 201 by using the conveying apparatus 213. Wherein the conveying device 213 may be a belt conveyor. Specifically, the raw material of quartz sand can be put into the raw material silo through the wheel loader 214, then the raw material of quartz sand is put into the belt conveyor 213 through the vibrating feeder 215 at the bottom of the raw material silo, and the raw material of quartz sand is put into the fluidized bed reaction tank 201 by the belt conveyor 213. The transfer apparatus 213 may be disposed above the current fluidized bed reactor tank 201.
In this step, the acid solution recovered from the previous fluidized bed reactor is added to the current fluidized bed reactor 201 through an acid-resistant pump for acid washing reaction.
That is, the acid solution in the last fluidized bed reaction tank is recovered, and is returned to the current fluidized bed reaction tank 201 through an acid-proof pump (the acid-proof pump here, also called as an acid solution circulation pump, which is distinguished from the subsequent acid solution circulation pump, and may be referred to as a third acid solution circulation pump), so as to realize the recycling of the acid solution. Of course, the acid solution in the current fluidized bed reaction tank 201 is also recovered after the reaction is finished, and is recovered to the next fluidized bed reaction tank through the acid-resistant pump, so that the recycling of the acid solution is realized.
In one embodiment, the acid solution recovered from the previous fluidized bed reaction tank is added to the current fluidized bed reaction tank through an acid-proof pump for acid washing reaction, and the acid washing reaction comprises:
adding new acid liquor into the acid liquor recovered from the last fluidized bed reaction tank to ensure that the proportion of each component of the recovered acid liquor reaches the preset requirement.
In this embodiment, regardless of the type of acid solution recovered, it is necessary to replenish, i.e., add new acid solution, so that the components of the recovered acid solution meet the requirements of the acid washing reaction. For example, the added new acid liquid is mixed acid liquid, and the mass percentage is as follows: 1% HF (hydrofluoric acid) + 10% H2C2O4(oxalic acid).
In the acid washing reaction process, the acid liquor overflowing from the top of the current fluidized bed reaction tank is heated by the acid liquor circulating pump through the heat exchanger 204 and then sent back to the current fluidized bed reaction tank from the bottom of the current fluidized bed reaction tank 201.
An overflow weir may be disposed at the top of the current fluidized bed reactor 201, and acid solution overflowing from the overflow weir may be discharged into a circulating acid bucket (may be referred to as a first circulating acid bucket 202), and then an acid solution circulating pump (may be referred to as a first acid solution circulating pump 203) is used to pump acid solution in the first circulating acid bucket 202 into the heat exchanger 204, and the heat exchanger 204 heats the acid solution, so that the cold acid solution becomes hot acid solution, and then the acid solution is pumped into the bottom of the current fluidized bed reactor 201, thereby achieving the purpose of returning to the current fluidized bed reactor 201. A settler may be disposed between the overflow weir and the first circulating acid tank 202, and after the acid solution overflowing from the overflow weir is discharged into the settler, the acid solution may be settled and precipitated by the settler and then discharged into the first circulating acid tank 202. The embodiment of the invention utilizes the circulation of acid liquor to achieve the effects of heating and stirring. The standing heat preservation reaction or the continuous circulating reaction can be selected according to the requirements of different products, and the acid washing reaction time can be set according to the requirements.
In one embodiment, the continuous pickling production method of quartz sand further comprises:
and recovering hot water generated after heat exchange of the heat exchanger, and configuring acid liquor by using the hot water.
The heat exchanger 204 can heat the acid solution by using the water vapor, the heated water vapor is changed into hot water, and the hot water can be used for configuration of the acid solution, so that the energy utilization efficiency is improved.
In step S102, after the acid washing reaction is finished, the acid solution is discharged through the filtering device at the bottom of the current fluidized bed reaction tank 201. The acid liquid can be discharged through the filter device, while the mortar remains in the current fluidized bed reactor 201.
The discharged acid liquid can be deacidified in vacuum to achieve the aim of recovery, and finally the recovered acid liquid can be conveyed to the next fluidized bed reaction tank for continuous use. As mentioned above, the acid solution recovered in this step may be added with new acid solution to make the ratio of each component of the recovered acid solution reach the preset requirement, so as to be transported to the next fluidized bed reaction tank for use.
Specifically, the acid solution discharged from the current fluidized bed reactor 201 may be discharged into the vacuum tank assembly 205 for vacuum deacidification, and then the acid solution in the vacuum tank assembly 205 is discharged into a circulating acid tank (may be referred to as a second circulating acid tank 206), and then pumped into the next fluidized bed reactor by an acid solution circulating pump (may be referred to as a second acid solution circulating pump 207) for continuous use. In fig. 2, the current fluidized bed reactor 201 is only illustrated, and in an actual scenario, the current fluidized bed reactor may be composed of a plurality of fluidized bed reactors.
In one embodiment, the continuous pickling production method of quartz sand further comprises:
and after deacidification is finished, adding clear water into the current fluidized bed reaction tank, then discharging acid liquor again, performing vacuum deacidification recovery, and finishing primary cleaning.
That is, after the acid solution is discharged from the filtering device at the bottom of the current fluidized bed reaction tank 201 in step S102, clear water may be added to the current fluidized bed reaction tank 201, and then the same process is repeated to discharge the acid solution, and vacuum deacidification recovery is performed, so that the purpose of primarily cleaning the mortar of the current fluidized bed reaction tank may be achieved, and simultaneously, the acid solution is further recovered, which also reduces the burden for subsequent water treatment. The acid solution recovered in this step may be mixed with the acid solution recovered in step S102 and processed together, thereby improving the efficiency of the recovery process.
In one embodiment, the amount of clean water added is equal to the amount of acid removed. That is, the amount of the clean water added in the preliminary cleaning process is equal to the amount of the acid liquid discharged in the step S102, so that the preliminary cleaning achieves a better cleaning effect.
In the step S103, adding circulating water into the current fluidized bed reaction tank 201, and opening a discharge valve at the bottom of the current fluidized bed reaction tank 201 to discharge the mortar; in this step, the mortar in the fluidized bed reactor 201 is discharged, and in order to improve the discharge efficiency, circulating water is added to discharge the mortar completely.
The discharged mortar is sent into a desliming bucket 209 by a slurry pump 208, the desliming bucket 209 is used for cleaning the mortar for the first time, sewage (namely wastewater) generated after the cleaning for the first time is discharged into a water treatment system 211 so as to recycle the sewage, the mortar obtained after the cleaning for the first time is discharged into a sand washer 210 at the lower part of the desliming bucket 209, the sand washer 210 is used for cleaning the mortar for the second time, the sewage (namely wastewater) generated after the cleaning for the second time is also discharged into the water treatment system 211 so as to recycle the sewage, the mortar obtained after the cleaning for the second time is put into a vacuum filter 212, the vacuum filter 212 is used for dehydrating the mortar, and products obtained after the dehydration can be output through a belt conveyor.
In one embodiment, the dewatering the mortar after the second cleaning in a vacuum filter and then outputting the mortar through a belt conveyor comprises:
and (3) placing the mortar subjected to the second cleaning into a vacuum filter 212 for dehydration to reduce the mass percentage of water in the mortar to below 8%, and then outputting the mortar through a belt conveyor.
In this embodiment, the dehydration degree is mainly limited, that is, the moisture mass percentage of the mortar needs to be reduced to below 8% to meet the product quality requirement, and then the mortar is output through a belt conveyor.
In one embodiment, the feeding the mortar into the desliming hopper by using the slurry pump for the first cleaning comprises:
the water inflow is controlled by a valve at the bottom of the desliming bucket 209, so that the complex floats out and overflows, and the mortar sinks based on the self weight, thereby completing the first cleaning.
In the embodiment, the water pressure is controlled by controlling the water inflow through controlling the valve at the bottom of the desliming hopper 209 by utilizing the characteristic that the complex and the quartz sand have different specific gravity and buoyancy, so that the purpose of floating the complex out of overflow and sinking the sand due to the self weight is achieved, and the cleaning and separating effects are realized.
In one embodiment, the continuous pickling production method of quartz sand further comprises:
mixing the sewage generated by the first cleaning and the sewage generated by the second cleaning in a homogenizing pool in the water treatment system.
The embodiment mixes the sewage that washs the production for the first time and the sewage that washs the production for the second time, guarantees that sewage content is stable, can improve sewage treatment efficiency, reduce cost.
In one embodiment, the continuous pickling production method of quartz sand further comprises:
sending the mixed sewage into a thickening tank in a water treatment system, and adding a fluorine ion treatment agent and a flocculating agent to flocculate and precipitate the sewage in the thickening tank;
and (3) enabling the supernatant in the thickening tank to flow into a circulating water tank for continuous recycling, and pumping the precipitate in the thickening tank into a plate-and-frame filter press by using a tank bottom pump for filtering to obtain a filter cake.
In this embodiment, the sewage after the mixture is sent to the thickening tank, and a precipitator (a fluorine ion treating agent and a flocculating agent) is added to the thickening tank to flocculate and precipitate the sewage in the thickening tank. The supernatant can flow into a circulating water tank for continuous recycling, the precipitate is pumped into a plate-and-frame filter press through a tank bottom pump to be filtered into a filter cake, and the filter cake can be sold as a byproduct, so that the effect of recycling is achieved.
Wherein the circulating water in the circulating water pool can be sent to the sand washer 210 for continuous use or sent to the fluidized bed reaction tank for use.
In the embodiment of the invention, the whole pickling production line can realize continuous production modes of continuous feeding, continuous heating, continuous deacidification, continuous discharging, continuous washing and continuous water treatment, and realizes continuous production of the existing intermittent pickling process. The process can also realize automatic control to realize accurate control.
The embodiment of the invention integrally arranges a plurality of working procedures required by each fluidized bed reaction tank: feeding, acid feeding, heating, stirring, deacidifying, discharging and cleaning, and ensuring that key processes are not conflicted, thereby realizing continuous production. Meanwhile, the quartz sand can have enough reaction time in the fluidized bed reaction tank, and the acid washing efficiency and the yield are greatly improved.
The embodiment of the invention can utilize a single set of heat exchange system for heating, and has high heat utilization rate, high heating speed, low heat loss and less equipment investment; meanwhile, the acid liquor flow during the cyclic heating is utilized to enable the quartz sand to reach a critical fluidization state in the fluidized bed reaction tank, so that the acid washing reaction effect is enhanced.
And each procedure in the production line can realize ordered production through an automatic system, and each link is accurately controlled.
In the product cleaning stage, the combined mode of a mud removing hopper, a sand washer and a belt type vacuum filter is utilized to complete the links of cleaning, dewatering, warehousing use (or packaging sale) and the like at one time.
The water treatment system can realize automatic centralized control, accurately aims at various harmful ions, and the treated water quality can reach the recycling standard.
The operation and control of the embodiment of the invention are simpler, and the labor intensity is reduced; the feeding system, the heating system, the acid discharging system and the sand washing system of the whole production line can be shared by one set, and the utilization rate of all equipment is improved; the water treatment can be more effective and targeted, and can be recycled or discharged after reaching standards. By utilizing the reaction principle of oxalic acid and hydrofluoric acid, the trend of complexes such as iron ions is effectively controlled, the reaction is better controlled, the acid dosage is reduced, and the water treatment capacity is reduced; the whole production process is combined with a glass production line, and direct supply downstream production of materials without falling to the ground and pollution or drying and screening are realized.
Referring to fig. 2, an embodiment of the present invention further provides a continuous pickling apparatus for quartz sand, which includes:
the current fluidized bed reaction tank 201 is used for providing quartz sand raw materials for acid washing reaction; the bottom of the current fluidized bed reaction tank 201 is provided with a filtering device and a discharge valve;
the conveying device 213 is arranged above the current fluidized bed reaction tank 201 and is used for adding the quartz sand raw materials into the current fluidized bed reaction tank 201 in sequence;
an acid-proof pump (not shown) connected to the current fluidized bed reactor 201 and configured to add the acid solution recovered from the previous fluidized bed reactor to the current fluidized bed reactor 201 for acid washing reaction;
the heat exchanger 204 is used for heating the acid liquor;
the acid liquor circulating pump (which may be referred to as a first acid liquor circulating pump 203) is connected to the heat exchanger 204, and is used for heating the acid liquor overflowing from the top of the current fluidized bed reaction tank 201 through the heat exchanger 204 and then returning the heated acid liquor from the bottom of the current fluidized bed reaction tank 201 to the current fluidized bed reaction tank 201 in the acid washing reaction process;
a filtering device (not shown) connected to the vacuum tank assembly 205 and used for discharging the acid solution after the acid washing reaction is finished;
the vacuum tank group 205 is connected to the current fluidized bed reaction tank 201, and is used for performing vacuum deacidification recovery on the discharged acid solution and conveying the recovered acid solution to the next fluidized bed reaction tank for continuous use;
a discharge valve (not shown) for discharging the mortar in the current fluidized bed reactor 201 after the circulating water is added into the current fluidized bed reactor 201;
a slurry pump 208 connected to the hopper 209 and the discharge valve and adapted to feed the discharged slurry into the hopper 209;
a desliming bucket 209 connected to the water treatment system 211 and the sand washer 210, for performing a first cleaning of the mortar, discharging sewage generated by the first cleaning into the water treatment system 211, and flowing the mortar generated by the first cleaning into the sand washer 210;
the water treatment system 211 is used for recycling sewage;
the sand washer 210 is connected to the water treatment system 211 and is used for carrying out secondary cleaning on the mortar, and sewage generated by the secondary cleaning is sent to the water treatment system;
and the vacuum filter 212 is connected to the sand washer 210 and is used for dehydrating the mortar after the second cleaning and outputting the dehydrated mortar through a belt conveyor.
The production equipment provided by the embodiment can be used for realizing the production method provided by the previous embodiment.
Specifically, the acid pump may also be referred to as a third acid circulation pump, and the acid solution overflowing from the top of the current fluidized bed reaction tank may be discharged into the circulating acid tank (may be referred to as the first circulating acid tank 202), and then the acid solution in the first circulating acid tank 202 is pumped into the heat exchanger 204 by the first acid circulation pump 203, and is heated by the heat exchanger 204, so that the cold acid solution is changed into hot acid solution, and then the acid solution is pumped into the bottom of the current fluidized bed reaction tank 201 and is sent back to the current fluidized bed reaction tank 201. A settler may be disposed between the overflow weir and the first circulating acid tank 202, and after the acid solution overflowing from the overflow weir is discharged into the settler, the acid solution may be settled and precipitated by the settler and then discharged into the first circulating acid tank. The acid liquid discharged from the current fluidized bed reactor 201 may be discharged into the vacuum tank set 205 for vacuum deacidification, and then the acid liquid in the vacuum tank set 205 is discharged into a circulating acid tank (may be referred to as a second circulating acid tank 206), and then pumped into the next fluidized bed reactor by an acid liquid circulating pump (may be referred to as a second acid liquid circulating pump 207) for continuous use.
That is, the top of the current fluidized bed reaction tank 201 is connected to the first circulating acid tank 202, the first circulating acid tank 202 is connected to the first acid liquid circulating pump 203, the first acid liquid circulating pump 203 is connected to the heat exchanger 204, and the heat exchanger 204 is connected to the bottom of the current fluidized bed reaction tank 201.
The filtering device at the bottom of the current fluidized bed reaction tank 201 is connected to the vacuum tank set 205, the vacuum tank set 205 is connected to the second circulating acid bucket 206, the second circulating acid bucket 206 is connected to the second acid liquid circulating pump 207, and the second acid liquid circulating pump 207 is connected to the next fluidized bed reaction tank.
The blow-off valve of current fluidized bed retort 201 bottom connect in slurry pump 208, slurry pump 208 connect in take off mud head 209 top, take off mud head 209 bottom connect in sand washer 210 top, sand washer 210 with take off mud head 209 all connect in water processing system 211. The vacuum filter 212 is connected to the sand washer 210.
For the details of the production apparatus, reference may be made to the foregoing embodiments of the production method, and further description is omitted here.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A continuous acid washing production method of quartz sand is characterized by comprising the following steps of;
adding quartz sand raw materials into a current fluidized bed reaction tank in sequence by utilizing conveying equipment, and adding acid liquid recovered from the previous fluidized bed reaction tank into the current fluidized bed reaction tank through an acid-resistant pump for acid washing reaction; in the acid washing reaction process, heating the acid liquor overflowing from the top of the current fluidized bed reaction tank by using an acid liquor circulating pump through a heat exchanger, and then sending the heated acid liquor back to the current fluidized bed reaction tank from the bottom of the current fluidized bed reaction tank;
after the acid washing reaction is finished, discharging acid liquor through a filtering device at the bottom of the current fluidized bed reaction tank, performing vacuum deacidification recovery, and conveying the recovered acid liquor to the next fluidized bed reaction tank for continuous use;
adding circulating water into the current fluidized bed reaction tank, and opening a discharge valve at the bottom of the fluidized bed reaction tank to discharge the mortar; then, the mortar is sent into a mud removing hopper by a slurry pump for primary cleaning, and sewage generated by the primary cleaning is discharged into a water treatment system for recycling; the mortar flows into a sand washer at the lower part of the desliming bucket for secondary cleaning, and sewage generated by the secondary cleaning is sent to a water treatment system for recycling; and (4) placing the mortar subjected to the second cleaning into a vacuum filter for dehydration, and then outputting the dehydrated mortar through a belt conveyor.
2. The continuous pickling production method of quartz sand according to claim 1, further comprising:
mixing the sewage generated by the first cleaning and the sewage generated by the second cleaning in a homogenizing pool in the water treatment system.
3. The continuous pickling production method of quartz sand according to claim 2, further comprising:
sending the mixed sewage into a thickening tank in a water treatment system, and adding a fluorine ion treatment agent and a flocculating agent to flocculate and precipitate the sewage in the thickening tank;
and (3) enabling the supernatant in the thickening tank to flow into a circulating water tank for continuous recycling, and pumping the precipitate in the thickening tank into a plate-and-frame filter press by using a tank bottom pump for filtering to obtain a filter cake.
4. The continuous pickling production method of quartz sand according to claim 1, further comprising:
and after deacidification is finished, adding clear water into the current fluidized bed reaction tank, then discharging acid liquor again, performing vacuum deacidification recovery, and finishing primary cleaning.
5. The continuous pickling production method of quartz sand according to claim 4, wherein the amount of the added clean water is equal to the amount of the discharged acid solution.
6. The continuous pickling method for quartz sand according to claim 1, wherein the step of adding the acid solution recovered from the previous fluidized bed reaction tank into the current fluidized bed reaction tank through an acid-resistant pump for pickling comprises:
adding new acid liquor into the acid liquor recovered from the last fluidized bed reaction tank to ensure that the proportion of each component of the recovered acid liquor reaches the preset requirement.
7. The continuous pickling production method of quartz sand according to claim 6, further comprising:
and recovering hot water generated after heat exchange of the heat exchanger, and configuring acid liquor by using the hot water.
8. The continuous pickling production method of quartz sand according to claim 1, wherein the first cleaning of the mortar in the mud removing hopper by the slurry pump comprises:
the water inflow is controlled through a valve at the bottom of the desliming bucket, so that the complex floats out and overflows, and meanwhile, the mortar sinks based on the self weight, and the first cleaning is completed.
9. The continuous pickling production method of quartz sand according to claim 1, wherein the step of dehydrating the mortar after the second cleaning in a vacuum filter and then outputting the dehydrated mortar through a belt conveyor comprises the following steps:
and (3) placing the mortar subjected to the secondary cleaning into a vacuum filter for dehydration to reduce the mass percent of water in the mortar to below 8%, and then outputting the mortar through a belt conveyor.
10. The continuous pickling production equipment for the quartz sand is characterized by comprising the following components:
the current fluidized bed reaction tank is used for providing quartz sand raw materials for acid washing reaction; a filtering device and a discharge valve are arranged at the bottom of the current fluidized bed reaction tank;
the conveying equipment is arranged above the current fluidized bed reaction tank and is used for sequentially adding the quartz sand raw materials into the current fluidized bed reaction tank;
the acid-resistant pump is connected with the current fluidized bed reaction tank and is used for adding the acid liquid recovered from the previous fluidized bed reaction tank into the current fluidized bed reaction tank for acid washing reaction;
the heat exchanger is used for heating the acid liquor;
the acid liquor circulating pump is connected with the heat exchanger and used for heating the acid liquor overflowing from the top of the current fluidized bed reaction tank through the heat exchanger in the acid washing reaction process and then sending the heated acid liquor back to the current fluidized bed reaction tank from the bottom of the current fluidized bed reaction tank;
the filtering device is connected with the vacuum tank group and is used for discharging acid liquor after the acid washing reaction is finished;
the vacuum tank group is connected with the current fluidized bed reaction tank, is used for carrying out vacuum deacidification recovery on the discharged acid liquid, and conveys the recovered acid liquid to the next fluidized bed reaction tank for continuous use;
the discharge valve is used for discharging the mortar in the current fluidized bed reaction tank after the circulating water is added into the current fluidized bed reaction tank;
the slurry pump is connected with the desliming hopper and the discharge valve and is used for sending the discharged mortar into the desliming hopper;
the sand washing system comprises a sand washing machine, a water treatment system, a mud removing hopper, a sand washing machine and a mud washing machine, wherein the sand washing machine is connected with the water treatment system;
the water treatment system is used for recycling the sewage;
the sand washer is connected with the water treatment system and used for carrying out secondary cleaning on the mortar and sending sewage generated by the secondary cleaning to the water treatment system;
and the vacuum filter is connected with the sand washer and used for dehydrating the mortar after the secondary cleaning and then outputting the mortar through a belt conveyor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915638A (en) * | 2021-01-22 | 2021-06-08 | 蕲春县昌兴石英设备有限公司 | Large-yield low-energy-consumption rapid dehumidification method for non-metal wet sand |
| CN113003781A (en) * | 2021-03-15 | 2021-06-22 | 蕲春县昌兴石英设备有限公司 | Treatment method of quartz sand pickling sewage |
| CN116143128A (en) * | 2023-04-25 | 2023-05-23 | 力丰硅科技(天津)有限公司 | Process method and device for purifying quartz sand by multi-step linkage three-phase flow pickling |
| CN116332190A (en) * | 2023-03-30 | 2023-06-27 | 湖南旗滨光能科技有限公司 | Quartz sand pickling system and pickling process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU715609A1 (en) * | 1978-05-26 | 1980-02-15 | Московский Ордена Ленина И Ордена Трудового Красного Знамени Государственный Университет Им.М.В.Ломоносова | Solution for pickling crystalline quartz piezoelements |
| SU1692651A1 (en) * | 1989-07-03 | 1991-11-23 | Научно-производственное объединение "Кварц" | Method for purifying quartz material |
| CN102303870A (en) * | 2011-08-26 | 2012-01-04 | 田辉明 | High-purity quartz sand purifying and pickling device |
| CN103641123A (en) * | 2013-11-21 | 2014-03-19 | 龚坚 | Quartz sand purification pickling technology and apparatus thereof |
| CN205295106U (en) * | 2015-12-31 | 2016-06-08 | 天津壹新环保工程有限公司 | Energy -efficient type mud desalination system |
| CN209423136U (en) * | 2018-11-30 | 2019-09-24 | 王林 | A kind of pot type quartz sand dehydration equipment |
| CN210856355U (en) * | 2019-11-30 | 2020-06-26 | 日照宝华新材料有限公司 | Row allies oneself with mends pickling rinsing unit with rinsing section in advance |
-
2020
- 2020-09-01 CN CN202010904440.5A patent/CN111992331B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU715609A1 (en) * | 1978-05-26 | 1980-02-15 | Московский Ордена Ленина И Ордена Трудового Красного Знамени Государственный Университет Им.М.В.Ломоносова | Solution for pickling crystalline quartz piezoelements |
| SU1692651A1 (en) * | 1989-07-03 | 1991-11-23 | Научно-производственное объединение "Кварц" | Method for purifying quartz material |
| CN102303870A (en) * | 2011-08-26 | 2012-01-04 | 田辉明 | High-purity quartz sand purifying and pickling device |
| CN103641123A (en) * | 2013-11-21 | 2014-03-19 | 龚坚 | Quartz sand purification pickling technology and apparatus thereof |
| CN205295106U (en) * | 2015-12-31 | 2016-06-08 | 天津壹新环保工程有限公司 | Energy -efficient type mud desalination system |
| CN209423136U (en) * | 2018-11-30 | 2019-09-24 | 王林 | A kind of pot type quartz sand dehydration equipment |
| CN210856355U (en) * | 2019-11-30 | 2020-06-26 | 日照宝华新材料有限公司 | Row allies oneself with mends pickling rinsing unit with rinsing section in advance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915638A (en) * | 2021-01-22 | 2021-06-08 | 蕲春县昌兴石英设备有限公司 | Large-yield low-energy-consumption rapid dehumidification method for non-metal wet sand |
| CN113003781A (en) * | 2021-03-15 | 2021-06-22 | 蕲春县昌兴石英设备有限公司 | Treatment method of quartz sand pickling sewage |
| CN116332190A (en) * | 2023-03-30 | 2023-06-27 | 湖南旗滨光能科技有限公司 | Quartz sand pickling system and pickling process |
| CN116143128A (en) * | 2023-04-25 | 2023-05-23 | 力丰硅科技(天津)有限公司 | Process method and device for purifying quartz sand by multi-step linkage three-phase flow pickling |
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