CN114988414A - Quartz sand acid elution purification system - Google Patents
Quartz sand acid elution purification system Download PDFInfo
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- CN114988414A CN114988414A CN202210599686.5A CN202210599686A CN114988414A CN 114988414 A CN114988414 A CN 114988414A CN 202210599686 A CN202210599686 A CN 202210599686A CN 114988414 A CN114988414 A CN 114988414A
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- 239000002253 acid Substances 0.000 title claims abstract description 328
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 239000006004 Quartz sand Substances 0.000 title claims abstract description 76
- 238000000746 purification Methods 0.000 title claims abstract description 38
- 238000010828 elution Methods 0.000 title description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 157
- 238000006243 chemical reaction Methods 0.000 claims abstract description 138
- 239000010865 sewage Substances 0.000 claims abstract description 85
- 239000003595 mist Substances 0.000 claims abstract description 52
- 238000005554 pickling Methods 0.000 claims abstract description 36
- 238000005406 washing Methods 0.000 claims abstract description 35
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000002352 surface water Substances 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims description 92
- 238000003860 storage Methods 0.000 claims description 53
- 238000006386 neutralization reaction Methods 0.000 claims description 40
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 29
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 29
- 239000004571 lime Substances 0.000 claims description 29
- 239000010802 sludge Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 20
- 238000004140 cleaning Methods 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 14
- 238000003916 acid precipitation Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 238000005189 flocculation Methods 0.000 claims description 2
- 230000016615 flocculation Effects 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 6
- 230000003749 cleanliness Effects 0.000 abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 12
- 238000004064 recycling Methods 0.000 description 7
- 239000002585 base Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010423 industrial mineral Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a quartz sand pickling purification system; it is characterized in that; the system is provided with an acid pumping and blending system, a sewage treatment system, an acid washing reaction tank, an acid mist recovery treatment system and a boiler heat exchange system; the system has high acid utilization rate, can stably remove quartz sand impurities after separating surface water and internal water of quartz sand particles in a purification reaction, and has high benefit and low cost. The circulating water treated by the system has high cleanliness, particularly good water quality, good whiteness of the cleaned quartz sand and stable quality.
Description
Technical Field
The invention relates to the field of quartz sand pickling, in particular to a quartz sand pickling and purifying system.
Background
It is known that quartz is a non-metallic mineral with properties of hardness, wear resistance, chemical stability, etc. The quartz sand is quartz particles formed by crushing and processing quartz stone, is an important industrial mineral raw material, and is widely used in the industrial fields of glass, casting, ceramics and fireproof materials, ferrosilicon smelting, metallurgical fusing agents, metallurgy, buildings, chemical engineering, plastics, rubber, grinding materials, filter materials and the like. The acid-washed quartz sand is prepared by using various acids, such as hydrochloric acid, sulfuric acid, nitric acid, oxalic acid, hydrofluoric acid and the like, for wet acid washing. At present, the reaction tank for carrying out the quartz sand pickling process has a complex structure, and the corresponding realization process is complicated; in addition, the existing quartz sand pickling lacks a good sewage treatment mode, so that the whole pickling purification is complicated.
Disclosure of Invention
Therefore, in order to solve the above-mentioned disadvantages, the present invention provides a quartz sand pickling and purifying system. The system has high acid utilization rate, can stably remove quartz sand impurities after separating surface water and internal water of quartz sand particles in a purification reaction, and has high benefit and low cost. The circulating water treated by the system has high cleanliness, particularly good water quality, good whiteness of the cleaned quartz sand and stable quality.
The invention is realized in such a way, and the quartz sand pickling purification system is constructed and is characterized in that; the system is provided with an acid pumping and blending system, a sewage treatment system, an acid washing reaction tank, an acid mist recovery treatment system and a boiler heat exchange system;
the acid pumping and blending system is provided with an acid storage tank, an acid blending tank and an acid sedimentation tank;
the sewage treatment system comprises a neutralization tank, a clean water tank, a sludge tank, a sedimentation tank A, a sedimentation tank B, a sedimentation tank C and a circulating water storage tank; the inlet end of the neutralization tank is provided with a sewage pump and is communicated with an external sewage storage tank through the opening; the output end of the neutralization tank is respectively communicated with a clean water tank and a sludge tank through a sludge pump, the clean water tank and the sludge tank are respectively communicated with an external deslimer, the deslimer is communicated with a sedimentation tank A, the sedimentation tank A, a sedimentation tank B and a sedimentation tank C are sequentially communicated, and the sedimentation tank C is communicated with a circulating water storage tank;
the acid washing reaction tank is provided with a reaction tank body, the upper part of the reaction tank body is provided with a tank cover, the inside of the reaction tank body is quartz sand, the bottom of the reaction tank body is provided with a plurality of water filtering grooves, and filter plates and filter cloth are paved on the water filtering grooves; the bottom of the reaction tank body is provided with an acid inlet; a water collecting pit corresponding to the bottom of the reaction tank body;
the acid mist recovery treatment system is provided with a condensing tank and a neutralizing spray tower;
the boiler heat exchange system is provided with a heat conduction oil boiler and a serial heat exchanger.
The quartz sand pickling purification system is characterized in that the quartz sand pickling purification system comprises a quartz sand pickling purification system, a quartz sand pickling purification system and a quartz sand pickling purification system; a lime tank and a lime stirrer are arranged outside the neutralization pond, and the lime tank is communicated with the neutralization pond through the lime stirrer; a special flocculating agent storage tank is arranged outside the neutralization tank and is communicated with the neutralization tank; the two sets of desliming machines are respectively communicated with an external sludge storage pool, a sedimentation pool A, a sedimentation pool B and a sedimentation pool C in sequence, and the sedimentation pool C is communicated with a circulating water storage pool; the output end of the circulating water storage pool is communicated with a sand washing water pump and is output to the reaction pool through the sand washing water pump.
The quartz sand pickling purification system is characterized in that the quartz sand pickling purification system comprises a quartz sand pickling purification system, a quartz sand pickling purification system and a quartz sand pickling purification system; the filter plate is two layers of porous filter plates (acid-resistant and high-temperature-resistant materials such as PPH plates, glass steel plates, PTFE plates and the like can be used), and the filter cloth is positioned between the two layers of porous filter plates; the top of the reaction tank body is provided with a water tank; a water outlet and an acid return port are arranged above the reaction tank body; the water outlet is communicated with the circulating water storage pool through a water inlet pipe; meanwhile, the water outlet is also communicated with an external sewage sedimentation tank through a water drainage pipe; the water inlet pipe and the water outlet pipe are respectively provided with a valve; the acid return port is communicated with an external acid sedimentation tank through an acid return pipe; the bottom of the reaction tank body is provided with three acid inlets; three water collecting pits corresponding to the bottom of the reaction tank body.
The quartz sand pickling purification system is characterized in that the quartz sand pickling purification system comprises a quartz sand pickling purification system, a quartz sand pickling purification system and a quartz sand pickling purification system; the system is implemented as follows;
raw materials are stored in a reaction tank: raw materials enter a factory and are poured into a raw material storehouse, then raw material quartz sand is grabbed into a reaction tank through a crane grab bucket, the bottom of the reaction tank is provided with three acid inlets and three water collecting pits, the bottom of the reaction tank is provided with a water filtering tank, two layers of filter plates and one layer of filter cloth are paved on the water filtering tank, two water outlets and two acid return ports are arranged above the reaction tank, the top of the reaction tank is provided with a water tank and a tank cover, and the raw material quartz sand can be grabbed into the reaction tank after the filter plates and the filter cloth are paved;
(II) acid extraction and blending formula: after raw material quartz sand enters a reaction tank, pumping acid liquor, enabling the acid liquor to enter a serial-type heat exchanger from an acid precipitation tank or an acid regulation tank through an acid-resistant pipeline (acid-resistant and high-temperature-resistant materials such as PPH (polypropylene) pipelines, glass steel pipelines and tetrafluoro (tetrafluoro) pipelines) by a siphon system, heating the acid liquor by a heat-conducting oil boiler, then exchanging heat of the acid liquor, enabling the acid liquor after heat exchange to enter the reaction tank from an acid inlet at the bottom of the reaction tank through the acid-resistant pipeline, installing a pressure relief pipe on the pipeline, and enabling the acid liquor after pressure relief to enter the acid precipitation tank or the acid regulation tank; all acid-resistant pipelines can expand after the acid liquor is heated, pipelines with different lengths are designed by calculating the expansion coefficient of the pipelines, and meanwhile, a compensator is used for avoiding the problem of thermal expansion; after acid liquor enters the reaction tank from an acid inlet at the bottom of the reaction tank, the liquid level of the acid liquor slowly rises, surface water and inner water of sand are separated by utilizing the principle that water is lower than acid concentration and can float, so that the acid liquor fully enters sand particles, water flows into a sewage sedimentation tank through a drain pipe by utilizing an upper water outlet, the water is sedimentated and then flows into a sewage storage tank, when the concentration of the acid liquor meets the requirement, the acid liquor is refluxed into the acid sedimentation tank by utilizing an upper acid return port through an acid return pipe, the concentration and the temperature of the acid liquor are measured in the acid liquor circulation process, and the reaction is completed after the specified concentration, temperature and reaction time are reached;
(III) acid mist recovery treatment: the upper parts of the reaction tank, the acid sedimentation tank, the acid storage tank, the acid adjusting tank and the sewage sedimentation tank are provided with a water tank, a tank cover and an acid mist air inlet pipe, the acid mist is sealed by utilizing the water sealing principle, the acid mist enters an acid mist recovery treatment system through the acid mist air inlet pipe at the top of the tank cover, and the system can condense 95 percent of the acid mist through a condensing tank to form acid liquid which is recovered to the acid sedimentation tank; the rest 5% of acid mist is subjected to acid-base neutralization treatment by a spray tower and then is discharged after reaching the standard;
and (IV) cleaning quartz sand: after quartz sand in the reaction tank reaches the reaction standard, deacidification and cleaning can be carried out, acid liquor is placed into an acid sedimentation tank from the bottom of the reaction tank through an acid discharge pipe, after the acid liquor is placed, the circulating water added into a circulating water storage tank from a water inlet pipe above the reaction tank is cleaned by utilizing the principle that the density of the acid liquor is higher than that of water and can sink, sewage generated during cleaning flows into the sewage sedimentation tank through a drain pipe at the bottom of the reaction tank and flows into the sewage storage tank after sedimentation, a reaction tank cover is opened after cleaning is finished, and the quartz sand is grabbed into a finished product storehouse through a crane grab bucket.
(V) sewage treatment system: after the generated sewage enters a sewage storage tank, the sewage in the sewage storage tank is extracted to a neutralization tank through a sewage pump, high-purity lime powder and water are stirred together into lime liquid through a lime stirrer, the lime liquid is added into the neutralization tank, an air pipe is arranged in the neutralization tank, gas is injected during acid-base neutralization, acid-base neutralization is carried out, after the pH value of acid-base is adjusted, a special flocculating agent is added for flocculation, then the lime liquid is respectively pumped into a clean water tank and a sludge tank through a pump, filter pressing is carried out through a desliming machine, the sludge enters the sludge storage tank, clean water flows into a sedimentation tank A, the lime liquid flows into a circulating water storage tank after tertiary sedimentation, and the water in the circulating water storage tank is used for cleaning sand in a reaction tank, so that the sewage is recycled and zero emission is achieved.
The invention has the following advantages: the invention provides a quartz sand acid elution purification process, which belongs to the field of quartz sand acid elution purification and has the following improvements and advantages:
the acid washing purification process provided by the invention comprises an acid washing reaction tank, an acid storage tank, an acid recycling tank, an acid sedimentation tank, an acid adjusting tank, a sewage tank, a siphon barrel, a heat conduction oil boiler, a serial heat exchanger, a sewage treatment system and an acid mist recovery treatment system, and is characterized in that: acid liquor is with acid-resistant pump utilizes siphon bucket to take out acid liquor to serial-type heat exchanger (adjusting acid tank and being used for acid liquor concentration formula to transfer to compare) from acid sedimentation tank through acidproof pipeline, heat transfer is carried out through boiler heating, let in acid liquor from pickling reaction tank bottom along advancing acid pipeline behind the heat transfer and carry out the pickling reaction, and add between the acidproof pipeline and be equipped with the compensation ware, prevent to extrude each other between acid liquor heating back pipeline and the pipeline, acid sedimentation tank, the top of adjusting acid tank pool is equipped with basin and pond lid, there is the acid mist intake pipe on the pond lid, acid mist intake pipe connection acid mist recovery processing system.
2, the bottom of the acid washing reaction tank is provided with an acid inlet pipe, an acid discharge pipe, a water discharge pipe and a water filtering tank, the acid inlet pipe is arranged at the bottom of the acid washing reaction tank, acid liquor enters the acid reaction tank (the length, the width and the height of the acid reaction tank determine the number of the acid inlet pipes), the acid discharge pipe is connected with the acid precipitation tank through an acid-resistant pipeline, the water filtering tank is arranged at the bottom of the acid washing reaction tank to facilitate the smoothness of the acid liquor of acid inlet and acid discharge, two layers of filter plates with different thicknesses and one layer of filter cloth are arranged on the water filtering tank, a plurality of acid through holes with the hole diameter of 10mm-20mm are arranged on the two layers of filter plates, an acid return pipe, a water discharge pipe and a water inlet pipe are arranged above the acid washing reaction tank, and the acid liquor and the water liquor respectively flow into the acid precipitation tank and the sewage precipitation tank through the acid-resistant pipeline, flow into the effluent water sump after the sewage sedimentation tank deposits, there are basin and pond lid pickling reaction tank top, and there is the acid mist intake pipe above the pond lid, and acid mist intake pipe intercommunication acid mist recovery processing system.
And 3, tank covers are arranged at the tops of the acid sedimentation tank, the acid adjusting tank and the acid washing reaction tank, and are provided with acid mist inlet pipes which are connected with an acid mist recovery processing system. The system can prepare 95% of acid mist into acid liquor for recycling, and the rest 5% of acid mist is discharged after reaching the standard after being neutralized by acid-base spraying.
And 4, heating the acid liquor by a heat conduction oil boiler through a serial heat exchanger for heat exchange, pumping the acid liquor to an acid washing reaction tank, removing quartz sand impurities after the acid liquor is soaked in heat cycle (according to different quartz ore species) for a certain reaction concentration and time, putting the acid liquor into an acid sedimentation tank through an acid putting pipeline, injecting clear water from a water inlet pipe above the acid reaction tank for washing after the acid liquor is put, putting the high-concentration acid liquor generated by washing into the acid sedimentation tank, putting the residual acid-containing sewage into a sewage sedimentation tank, and allowing the residual acid-containing sewage to flow into a sewage storage tank after sedimentation. The system has high acid utilization rate, can stably remove quartz sand impurities after separating surface water and internal water of quartz sand particles in a purification reaction, and has high benefit and low cost.
And 5, pumping the sewage in the sewage storage tank to a sewage neutralization tank through an acid-proof pump, and treating the sewage through a sewage treatment system to achieve hundred-percent zero-emission recycling of the sewage. The circulating water treated by the system has high cleanliness, particularly good water quality, good whiteness of the cleaned quartz sand and stable quality.
Drawings
FIG. 1 is a diagram of the overall system construction of the present invention;
FIG. 2 is a partial schematic view of a sewage treatment system according to the present invention;
FIG. 3 is a partial schematic view of the pickling reaction cell according to the present invention.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 3, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.
The invention provides a quartz sand pickling purification system by improvement, which can be implemented as follows as shown in figure 1; the system comprises an acid pumping and blending system 100, a sewage treatment system 200, an acid washing reaction tank 300, an acid mist recovery treatment system 400 and a heat conduction oil system 500;
the acid pumping and blending system 100 is provided with an acid storage tank 101, an acid blending tank 102 and an acid sedimentation tank 103; the sewage treatment system 200 comprises a neutralization tank 201, a clean water tank 202, a sludge tank 203, a sedimentation tank A204, a sedimentation tank B205, a sedimentation tank C206 and a circulating water storage tank 207; the inlet end of the neutralization tank 201 is provided with a sewage pump 208 and is communicated with an external sewage storage tank through the inlet end; the output end of the neutralization tank 201 is respectively communicated with a clean water tank 202 and a sludge tank 203 through a sludge pump 209, the clean water tank 202 and the sludge tank 203 are respectively communicated with an external desliming machine 210, the desliming machine 210 is communicated with a sedimentation tank A204, the sedimentation tank A204, a sedimentation tank B205 and a sedimentation tank C206 are sequentially communicated, and the sedimentation tank C206 is communicated with a circulating water storage tank 207;
the acid washing reaction tank 300 is provided with a reaction tank body, the upper part of the reaction tank body is provided with a tank cover 301, the inside of the reaction tank body is quartz sand 302, the bottom of the reaction tank body is provided with a plurality of water filtering grooves 303, and filter plates 304 and filter cloth 305 are paved on the water filtering grooves 303; the bottom of the reaction tank body is provided with an acid inlet 306; a sump 307 corresponding to the bottom of the reaction tank body;
the acid mist recovery processing system 400 is provided with a condensing tank 401 and a neutralizing spray tower 402;
the heat conducting oil system 500 comprises a heat conducting oil boiler 501 and a serial heat exchanger 502.
The quartz sand pickling purification system according to the invention is shown in fig. 2; a lime tank 211 and a lime stirrer 212 are arranged outside the neutralization pond 201, and the lime tank 211 is communicated with the neutralization pond 201 through the lime stirrer 212; a special flocculating agent storage tank 213 is arranged outside the neutralization tank 201, and the special flocculating agent storage tank 213 is communicated with the neutralization tank 201; the two sets of deslimers 210 are respectively communicated with the external sludge storage tank 214, the sedimentation tank A204, the sedimentation tank B205 and the sedimentation tank C206 in sequence, and the sedimentation tank C206 is communicated with the circulating water storage tank 207; the output end of the circulating water storage tank 207 is communicated with a sand washing water pump 215 and is output to the reaction tank through the sand washing water pump 215.
The quartz sand pickling purification system according to the invention is shown in fig. 3; the filter plate 304 is a two-layer porous filter plate, and the filter cloth 305 is positioned between the two layers of porous filter plates; a water tank 308 is arranged at the top of the reaction tank body; a water outlet 309 and an acid return port 310 are arranged above the reaction tank body; the water outlet 309 is communicated with an external water supply pipeline through a water inlet pipe 311; meanwhile, the water outlet 309 is also communicated with an external sewage sedimentation tank through a water outlet pipe 312; the water inlet pipe 311 and the water outlet pipe 312 are respectively provided with a valve; the acid return port 310 is communicated with an external acid sedimentation tank through an acid return pipe 313; the bottom of the reaction tank body is provided with three acid inlets 306; three sumps 307 corresponding to the bottom of the reaction tank body.
The quartz sand acid elution purification system is implemented as follows;
raw materials are stored in a reaction tank: raw materials enter a factory and are poured into a raw material storehouse, then raw material quartz sand is grabbed into a reaction tank through a travelling crane grab bucket, three acid inlets are formed in the bottom of the reaction tank, water grooves are formed in the bottom of the reaction tank, two layers of filter plates and one layer of filter cloth are paved on the water grooves, two water outlets and two acid discharge ports are formed in the upper portion of the reaction tank, water grooves and a tank cover are formed in the top of the reaction tank, and the raw material quartz sand can be grabbed into the reaction tank after the filter plates and the filter cloth are paved;
(II) acid extraction and blending formula: after raw material quartz sand enters a reaction tank, acid liquor starts to be extracted, the raw material quartz sand enters a serial heat exchanger from an acid precipitation tank or an acid preparation tank through an acid-resistant pipeline (a PPH pipeline, a glass fiber reinforced plastic pipeline and a tetrafluoro pipeline) through a siphon system, heat exchange is carried out on hydrochloric acid after the heating of a boiler, the hydrochloric acid after the heat exchange enters the reaction tank from the bottom of the reaction tank through the acid-resistant pipeline, a pressure relief device is arranged on the pipeline, and the hydrochloric acid after the pressure relief enters the acid precipitation tank or an acid adjusting tank; the hydrochloric acid generates temperature after being heated, all acid-resistant pipelines can expand, pipelines with different lengths are designed by calculating the expansion coefficient of the pipelines, and the problem of thermal expansion is avoided by using a telescopic joint; after hydrochloric acid enters the reaction tank from the bottom of the reaction tank, the liquid level of the acid liquor slowly rises, the internal water in the sand is separated by utilizing the principle that the water is lower than the acid concentration and can float, so that the concentration of the whole reaction tank is stable, the acid liquor fully enters the sand particles, finally, the water is drained through the water outlet on the sand and flows into the sewage sedimentation tank and then flows into the sewage tank, when the concentration of the acid liquor meets the requirement, the upper acid return port is utilized, the acid liquor is enabled to flow back to the acid sedimentation tank, the acid concentration is measured in the acid circulation process, and the reaction is completed after the specified acid concentration, temperature and reaction time are reached;
(III) acid mist treatment: the upper parts of the reaction tank, the acid sedimentation tank, the acid storage tank, the acid adjusting tank and the sewage tank are provided with a water tank, a tank cover and an acid mist air inlet pipe, the acid mist is sealed by utilizing the water sealing principle and enters an acid mist evolution system of the acid mist air inlet pipe through an outlet at the top of the tank cover, and the acid mist with high concentration is condensed to form acid liquid which is recovered to the acid sedimentation tank; the residual acid mist is subjected to acid-base neutralization treatment by a spray tower and then is discharged after reaching the standard;
and (IV) cleaning quartz sand: after the quartz sand in the reaction tank reaches the reaction standard, deacidifying and cleaning, putting acid liquor into an acid sedimentation tank from the bottom of the reaction tank, starting to add clean water into a reservoir from a water outlet above the reaction tank for cleaning after the acid liquor is put, putting sewage generated during cleaning into a sewage sedimentation tank, flowing into a sewage tank, opening a tank cover of the reaction tank, discharging the quartz sand in the reaction tank, grabbing the quartz sand into a finished product warehouse by a crane grab bucket, and selling on the market;
(V) sewage treatment system: after the generated sewage enters a sewage tank, waste liquid in the sewage tank is extracted to a neutralization tank through an acid-resistant pipeline by a siphon system to be neutralized in acid and alkali, high-purity limestone is utilized to be neutralized in acid and alkali, meanwhile, an automatic batching system is utilized to carry out high-purity limestone batching, high-purity lime powder and water are stirred together into lime liquid through a spiral stirrer, the lime liquid is added into the neutralization tank to achieve the effect of acid and alkali neutralization, after the pH value of acid and alkali is adjusted, a special medicament is added to flocculate, then the lime powder is pumped into a separation barrel through a pump, filter pressing is carried out through a filter press, solid-liquid separation is carried out, water flows into a sedimentation tank below the filter press, the lime liquid flows into a reservoir after three times of sedimentation, the water in the reservoir is used for cleaning quartz sand in a reaction tank, and zero discharge of sewage recycling is achieved.
The invention provides a quartz sand acid elution purification process, which belongs to the field of quartz sand acid elution purification and has the following improvements and advantages:
the acid washing purification process provided by the invention comprises an acid washing reaction tank, an acid storage tank, an acid recycling tank, an acid sedimentation tank, an acid adjusting tank, a sewage tank, a siphon barrel, a heat conduction oil boiler, a serial heat exchanger, a sewage treatment system and an acid mist recovery treatment system, and is characterized in that: acid liquor is with acid-resistant pump utilizes siphon bucket to take out acid liquor to serial-type heat exchanger (adjusting acid tank and being used for acid liquor concentration formula to transfer to compare) from acid sedimentation tank through acidproof pipeline, heat transfer is carried out through boiler heating, let in acid liquor from pickling reaction tank bottom along advancing acid pipeline behind the heat transfer and carry out the pickling reaction, and add between the acidproof pipeline and be equipped with the compensation ware, prevent to extrude each other between acid liquor heating back pipeline and the pipeline, acid sedimentation tank, the top of adjusting acid tank pool is equipped with basin and pond lid, there is the acid mist intake pipe on the pond lid, acid mist intake pipe connection acid mist recovery processing system.
The acid washing reaction tank is characterized in that an acid inlet pipe, an acid discharge pipe, a water discharge pipe and a water filtering tank are arranged at the bottom of the acid washing reaction tank, acid enters the acid reaction tank (the length, the width and the height of the acid reaction tank determine the number of the acid inlet pipes), the acid discharge pipe is connected with an acid precipitation tank through an acid-resistant pipeline, the water filtering tank is arranged at the bottom of the acid washing reaction tank, so that the acid entering and the acid discharging can be smoothly performed, two layers of filter plates and one layer of filter cloth with different thicknesses are arranged on the water filtering tank, a plurality of acid through holes with the hole diameter of 1cm are formed in the two layers of filter plates, an acid return pipe, a water discharge pipe and a water inlet pipe are arranged above the acid washing reaction tank, the acid and the water respectively flow into the acid precipitation tank and a sewage precipitation tank through the acid-resistant pipeline, the acid and the water flow into the sewage precipitation tank after the sewage precipitation, a water tank and a water tank cover are arranged at the top of the acid washing reaction tank, an acid mist inlet pipe is arranged above the tank cover, and is communicated with an acid mist recovery treatment system.
And 3, tank covers are arranged at the tops of the acid sedimentation tank, the acid adjusting tank and the acid washing reaction tank, and are provided with acid mist inlet pipes which are connected with an acid mist recovery processing system. The system can prepare 95% of acid mist into acid liquor for recycling, and the rest 5% of acid mist is discharged after reaching the standard after being neutralized by acid and alkali spraying.
And 4, heating the acid liquor by a heat conduction oil boiler through a serial heat exchanger for heat exchange, pumping the acid liquor to an acid washing reaction tank, removing quartz sand impurities after the acid liquor is soaked in heat cycle (according to different quartz ore species) for a certain reaction concentration and time, putting the acid liquor into an acid sedimentation tank through an acid putting pipeline, injecting clear water from a water inlet pipe above the acid reaction tank for washing after the acid liquor is put, putting the high-concentration acid liquor generated by washing into the acid sedimentation tank, putting the residual acid-containing sewage into a sewage sedimentation tank, and allowing the residual acid-containing sewage to flow into a sewage storage tank after sedimentation. The system has high acid utilization rate, can stably remove quartz sand impurities after separating surface water and internal water of quartz sand particles in a purification reaction, and has high benefit and low cost.
And 5, pumping the sewage in the sewage storage tank to a sewage neutralization tank through an acid-proof pump, and treating the sewage through a sewage treatment system to achieve hundred-percent zero-emission recycling of the sewage. The circulating water treated by the system has high cleanliness, particularly good water quality, good whiteness of the cleaned quartz sand and stable quality.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A quartz sand pickling purification system is characterized in that; the system is provided with an acid pumping and blending system (100), a sewage treatment system (200), an acid washing reaction tank (300), an acid mist recovery treatment system (400) and a boiler heat exchange system (500);
the acid pumping and blending system (100) is provided with an acid storage tank (101), an acid adjusting tank (102) and an acid sedimentation tank (103);
the sewage treatment system (200) comprises a neutralization tank (201), a clean water tank (202), a sludge tank (203), a sedimentation tank A (204), a sedimentation tank B (205), a sedimentation tank C (206) and a circulating water storage tank (207); a sewage pump (208) is arranged at the inlet end of the neutralization tank (201) and is communicated with an external sewage storage tank through the inlet end; the output end of the neutralization tank (201) is respectively communicated with a clean water tank (202) and a sludge tank (203) through a sludge pump (209), the clean water tank (202) and the sludge tank (203) are respectively communicated with an external desliming machine (210), the desliming machine (210) is communicated with a sedimentation tank A (204), the sedimentation tank A (204), a sedimentation tank B (205) and a sedimentation tank C (206) are sequentially communicated, and the sedimentation tank C (206) is communicated with a circulating water storage tank (207);
the acid washing reaction tank (300) is provided with a reaction tank body, the upper part of the reaction tank body is provided with a tank cover (301), (an acid return port, a water outlet and a water tank), the inside of the reaction tank body is quartz sand (302), the bottom of the reaction tank body is provided with a plurality of water filtering tanks (303), and filter plates (304) and filter cloth (305) are paved on the water filtering tanks (303); the bottom of the reaction tank body is provided with an acid inlet (306); a sump (307) corresponding to the bottom of the reaction tank;
the acid mist recovery processing system (400) is provided with a plurality of condensing tanks (401) and a neutralization spray tower (402); the boiler heat exchange system (500) is provided with a heat conducting oil boiler (501) and a serial heat exchanger (502).
2. The quartz sand pickling purification system of claim 1, wherein; a lime tank (211) and a lime stirrer (212) are arranged outside the neutralization pond (201), and the lime tank (211) is communicated with the neutralization pond (201) through the lime stirrer (212); a special flocculant storage tank (213) is arranged outside the neutralization tank (201), and the special flocculant storage tank (213) is communicated with the neutralization tank (201); the two sets of deslimers (210) are respectively communicated with an external sludge storage tank (214), a sedimentation tank A (204), the sedimentation tank A (204), a sedimentation tank B (205) and a sedimentation tank C (206) in sequence, and the sedimentation tank C (206) is communicated with a circulating water storage tank (207); the output end of the circulating water storage tank (207) is communicated with a sand washing water pump (215) and is output to the reaction tank through the sand washing water pump (215).
3. The quartz sand pickling purification system of claim 1, wherein; the filter plate (304) is two layers of porous filter plates (acid-resistant and high-temperature-resistant materials such as PPH plates, glass fiber reinforced plastic plates and PTFE plates can be used), and the filter cloth (305) is positioned between the two layers of porous filter plates; a water tank (308) is arranged at the top of the reaction tank body; a water outlet (309) and an acid return port (310) are arranged above the reaction tank body; the water outlet (309) is communicated with the circulating water storage pool through a water inlet pipe (311); meanwhile, the water outlet (309) is also communicated with an external sewage sedimentation tank through a water discharge pipe (312); valves are respectively arranged on the water inlet pipe (311) and the water outlet pipe (312); the acid return port (310) is communicated with an external acid sedimentation tank through an acid return pipe (313); the bottom of the reaction tank body is provided with three acid inlets (306); three water collecting pits (307) corresponding to the bottom of the reaction tank body.
4. The quartz sand pickling purification system of claim 1, wherein; the system is implemented as follows;
raw materials are stored in a reaction tank: raw materials enter a factory and are poured into a raw material storehouse, then raw material quartz sand is grabbed into a reaction tank through a crane grab bucket, the bottom of the reaction tank is provided with three acid inlets and three water collecting pits, the bottom of the reaction tank is provided with a water filtering tank, two layers of filter plates and one layer of filter cloth are paved on the water filtering tank, two water outlets and two acid return ports are arranged above the reaction tank, the top of the reaction tank is provided with a water tank and a tank cover, and the raw material quartz sand can be grabbed into the reaction tank after the filter plates and the filter cloth are paved;
(II) acid extraction and blending formula: after raw material quartz sand enters a reaction tank, pumping acid liquor, enabling the acid liquor to enter a serial-type heat exchanger from an acid precipitation tank or an acid regulation tank through an acid-resistant pipeline (acid-resistant and high-temperature-resistant materials such as PPH (polypropylene) pipelines, glass steel pipelines and tetrafluoro (tetrafluoro) pipelines) by a siphon system, heating the acid liquor by a heat-conducting oil boiler, then exchanging heat of the acid liquor, enabling the acid liquor after heat exchange to enter the reaction tank from an acid inlet at the bottom of the reaction tank through the acid-resistant pipeline, installing a pressure relief pipe on the pipeline, and enabling the acid liquor after pressure relief to enter the acid precipitation tank or the acid regulation tank; all acid-resistant pipelines expand after the acid liquid is heated, pipelines with different lengths are designed by calculating the expansion coefficient of the pipelines, and meanwhile, the problem of thermal expansion is avoided by using a compensator; after acid liquor enters the reaction tank from an acid inlet at the bottom of the reaction tank, the liquid level of the acid liquor slowly rises, the surface water and the internal water of sand are separated by utilizing the principle that water is lower than the acid concentration and can float, so that the acid liquor fully enters sand particles, water flows into a sewage sedimentation tank through a drain pipe by utilizing an upper water outlet, flows into a sewage storage tank after sedimentation, and returns the acid liquor to the acid sedimentation tank through an acid return pipe by utilizing an upper acid return port when the acid liquor concentration meets the requirement, the acid liquor concentration and the temperature are measured in the acid liquor circulation process, and the reaction is finished after the specified concentration, temperature and reaction time are reached;
(III) acid mist recovery treatment: the upper parts of the reaction tank, the acid sedimentation tank, the acid storage tank, the acid adjusting tank and the sewage sedimentation tank are all provided with a water tank, a tank cover and an acid mist air inlet pipe, the acid mist is sealed by utilizing the water sealing principle, the acid mist enters an acid mist recovery treatment system through the acid mist air inlet pipe at the top of the tank cover, and the acid mist recovery treatment system can condense 95 percent of the acid mist through a condensing tank to form acid liquid which is recovered to the acid sedimentation tank; the rest 5% of acid mist is subjected to acid-base neutralization treatment by a spray tower and then is discharged after reaching the standard;
and (IV) cleaning quartz sand: after the quartz sand in the reaction tank reaches the reaction standard, deacidifying and cleaning, putting acid liquor into an acid sedimentation tank from the bottom of the reaction tank through an acid discharge pipe, after the acid liquor is put, adding circulating water into a circulating water storage tank from a water inlet pipe above the reaction tank for cleaning by utilizing the principle that the density of the acid liquor is greater than that of water and can sink, enabling sewage generated during cleaning to flow into a sewage sedimentation tank through a drain pipe at the bottom of the reaction tank, enabling the sewage to flow into the sewage storage tank after sedimentation, opening a cover of the reaction tank after cleaning is finished, and grabbing the quartz sand into a finished product storehouse through a crane grab bucket;
(V) sewage treatment system: after the generated sewage enters a sewage storage tank, the sewage in the sewage storage tank is extracted to a neutralization tank through a sewage pump, high-purity lime powder and water are stirred together into lime liquid through a lime stirrer, the lime liquid is added into the neutralization tank, an air pipe is arranged in the neutralization tank, gas is injected during acid-base neutralization, acid-base neutralization is carried out, after the pH value of acid-base is adjusted, a special flocculating agent is added for flocculation, then the lime liquid is respectively pumped into a clean water tank and a sludge tank through a pump, filter pressing is carried out through a desliming machine, the sludge enters the sludge storage tank, clean water flows into a sedimentation tank A, the lime liquid flows into a circulating water storage tank after tertiary sedimentation, and the water in the circulating water storage tank is used for cleaning sand in a reaction tank, so that the sewage is recycled and zero emission is achieved.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| JPS6283313A (en) * | 1985-10-08 | 1987-04-16 | Kawatetsu Kogyo Kk | Method for highly purifying silica |
| CN102303870A (en) * | 2011-08-26 | 2012-01-04 | 田辉明 | High-purity quartz sand purifying and pickling device |
| CN205442660U (en) * | 2016-04-01 | 2016-08-10 | 王林 | Quartz sand pickling installation |
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2022
- 2022-05-30 CN CN202210599686.5A patent/CN114988414B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6283313A (en) * | 1985-10-08 | 1987-04-16 | Kawatetsu Kogyo Kk | Method for highly purifying silica |
| CN102303870A (en) * | 2011-08-26 | 2012-01-04 | 田辉明 | High-purity quartz sand purifying and pickling device |
| CN205442660U (en) * | 2016-04-01 | 2016-08-10 | 王林 | Quartz sand pickling installation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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