CN103539112B - Acid pickling process and acid pickling system for active carbon - Google Patents
Acid pickling process and acid pickling system for active carbon Download PDFInfo
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- CN103539112B CN103539112B CN201310466389.4A CN201310466389A CN103539112B CN 103539112 B CN103539112 B CN 103539112B CN 201310466389 A CN201310466389 A CN 201310466389A CN 103539112 B CN103539112 B CN 103539112B
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Abstract
The invention provides an acid pickling process for active carbon. The acid pickling process comprises the following steps of: providing an acid pickling device and injecting a certain amount of water in the device; adding a certain amount of hydrochloric acid to the acid pickling device, and introducing high-pressure gas and stirring to form acid pickling solution with a certain concentration; measuring preprocessed active carbon material and feeding the active carbon material to the acid pickling device, soaking and stirring; introducing steam for heating and then alternately introducing high-pressure gas and steam for 1-2 hours; discharging the acid pickling solution at the end of acid pickling, and washing the active carbon material with water; and dehydrating, drying and screening to obtain the active carbon finished product. The invention also provides an acid pickling system for active carbon. By adopting the acid pickling process and the acid pickling system for active carbon, the semi-automatic continuous work of the whole acid pickling process can be realized, the sealing effect of the whole acid pickling process is realized, and pollution to the environment and corrosion to peripheral equipment can be avoided.
Description
Technical field
The present invention relates to gac preparation field, particularly a kind of gac acid cleaning process and pickling system.
Background technology
Gac is a kind of artificial Carbon Materials goods with highly developed pore texture and very big inner ratio surface area, primarily of carbon (85% ~ 92%) composition, and also element and some inorganic minerals such as hydrogeneous, oxygen, sulphur, nitrogen.These inorganic minerals are in the use procedure in some field, and activated carbon surface easily deposits the material producing carbonate, and then make the active significantly reduction of charcoal absorption, directly affect every technic index of adsorbent charcoal and product; During as water purification charcoal, then can in the process contacted with water for a long time, the inorganic mineral in gac and acid soluble material directly can have influence on the mineral concentration in water quality.Therefore, gac, in the use procedure in some field, needs to carry out pickling, washes to remove the iron ion and other metal ion and acid soluble material that produce in Raw material processing process.
At present, the gac that Physical is produced, great majority all will through overpickling, washing step.Acid cleaning process is mainly based on soak acid-cleaning method.Traditional gac pickling process is mainly by manually pouring in the pickling tank with the thorough one-tenth of refractory brick by material, then soak with hydrochloric acid or nitric acid diluting soln, machinery or air agitation are carried out in artificial timing, after material index reaches requirement, more manually carry out the operation of the operations such as discharging, dehydration, drying.In the industrial production, this kind of production method presents many shortcomings, as labor strength is larger, greatly, pickling speed is slower and uneven for acid solution consumption and process water loss, volatilization acid mist corrosion periphery production facility, and aggravating working environment, pickling efficiency is low, level of automation is low.
Summary of the invention
The problem that the present invention solves is to provide a kind of gac acid cleaning process and pickling system, solves existing activated carbon acid plant complex structure, efficiency is low, and the problem such as acid cleaning process level of automation is low.
For solving the problem, the technical solution used in the present invention is:
A kind of gac acid cleaning process, comprises the steps: to provide a pickler, and injects a certain amount of water; Add a certain amount of hydrochloric acid to described pickler, and pass into high pressure gas and stir, form certain density pickle solution; ; Pretreated gac material metering is sent into pickler, soaks 5 to 15 minutes, and in immersion process, pass into high pressure gas stir; In pickler, pass into steam, make described pickle solution be warming up to 100 degrees Celsius; In pickler, alternately pass into high pressure gas and steam, and continue 1 ~ 2 hour; Pickle solution in discharge pickler, and pass into water and wash; Gac material after washing is delivered in water trap and carries out vacuum filtration dehydration; Gac material after dehydration is delivered to vibrated fluidized bed and carries out warm air drying and screening, obtain active carbon finished products.
Further, described concentration of hydrochloric acid is massfraction 3% to 8%.
Further, described soak time is 10 minutes.
Further, maintain 30 minutes after described pickle solution is warming up to 100 degrees Celsius, more alternately pass into high pressure gas and steam.
Further, in the process alternately passing into high pressure gas and steam, described pickle solution temperature maintains 60 to 80 degrees Celsius.
Further, described pickler is connected with acid fog absorption tower, and the acid mist produced in described acid fog absorption tower absorption acid cleaning process also carries out acid mist process.
Further, the concentration of described pickle solution is massfraction: 3% to 12%
Further, described pickle solution is disposed to spent acid solution processing unit and carries out wastewater treatment.
A kind of gac pickling system, comprise pickler, metering feed bin, acid fog absorption tower, water trap, vibrated fluidized bed, spent acid solution processing unit, described metering feed bin is connected with the opening for feed of described pickler, described acid fog absorption tower is connected to the venting port at described pickler top, described water trap is connected to the discharge port bottom described pickler, and the discharge port of described water trap then connects described vibrated fluidized bed.
Further, described pickler comprises: tank body, and described tank body top is provided with opening for feed, acid inlet, water-in and venting port, and described tank base is provided with water port and discharge port; Water back, is positioned at described tank body bottom; Filter cylinder, is positioned at described tank body, is connected with water port.
Compared with prior art, the advantage of technical solution of the present invention is:
By carrying out pickle solution immersion to gac material, recycling high pressure gas stir gac material, make gac material can abundant contact acid washing lotion, and pass into steam to heat gac material and pickle solution when pickling, gac material surface is more thoroughly reacted with pickle solution, and whole acid cleaning process can realize automatization non-stop run.Further, the present invention also provides a kind of gac pickling system, realizes whole acid cleaning process automatization, and can not cause detrimentally affect to environment.
Accompanying drawing explanation
Fig. 1 is specific embodiment of the invention gac acid cleaning process schema.
Fig. 2 is specific embodiment of the invention gac pickling system schematic diagram.
Fig. 3 is specific embodiment of the invention pickler schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
Fig. 1 is specific embodiment of the invention schematic flow sheet.As shown in Figure 1, a kind of gac acid cleaning process, comprises the steps:
Step S11, provides a pickler, and injects a certain amount of water.Described concentration of hydrochloric acid is massfraction 3% to 8%, is preferably 5%.Certainly, described hydrochloric acid also can adopt other commercial acids such as hydrochloric acid, nitric acid, hydrofluoric acid and mixing acid to replace, and preferably adopts hydrochloric acid as spent pickling acid.Described water is the domestic water meeting water supply standard, and water as herein described is the water of this standard, can certainly be the water that the purity such as deionized water are higher.
Step S12, adds a certain amount of hydrochloric acid to described pickler, and passes into high pressure gas and stir, and forms certain density pickle solution.Described concentration, according to practical situation, can be massfraction 3% to 12%.
Step S13, sends pretreated gac material metering into pickler, soaks 5 to 15 minutes, and in immersion process, passes into high pressure gas stir.In this step, described pre-treatment comprises the impurity such as iron, sand removing and contain in gac material and tentatively sieves gac material, makes gac material particles size more homogeneous.Pretreated gac material is sent in metering feed bin, and after the gac material sent into reaches certainweight, the material inlet valve of metering feed bin is closed automatically; Then gac material enters in described pickler through gas delivery.When gac material is sent into after in described pickler, to be immersed in pickle solution 5 to 15 minutes, to be preferably 10 minutes.Meanwhile, in immersion process, pass into high pressure gas and stir, gac material surface is fully contacted with pickle solution.
Step S14, passes into steam in pickler, makes described pickle solution be warming up to 100 degrees Celsius.After gac material has soaked, in pickler, pass into steam, make pickle solution temperature be increased to 100 degrees Celsius; At such a temperature, can maintain 30 minutes, gac material is soaked more abundant, then pickling effect is better.
Step S15, alternately passes into high pressure gas and steam in pickler, and continues 1 ~ 2 hour.After pickle solution temperature rises to 100 degrees Celsius, in pickler, alternately pass into high pressure gas and steam, and continue 1 to 2 hour.Passing into of described high pressure gas, can constantly stirring active charcoal material and pickle solution; Described steam then can make pickle solution maintain the temperature of about 60 to 80, to ensure the effect of pickling.
In above-mentioned steps, volatilize to prevent pickle solution and form acid mist pollution environment, described pickler is connected with acid fog absorption tower, the acid mist produced is absorbed process, ensure environmental friendliness in whole acid cleaning process.
Step S16, the pickle solution in discharge pickler, and pass into water and wash.After pickling terminates, the pickle solution of draining in pickler, and pass into water the gac material in pickler is rinsed.
Step S17, delivers to the gac material after washing in water trap and carries out vacuum filtration dehydration.After washing completes, gac material carries out discharging from the discharge port of pickler, and is sent in water trap and carries out vacuum filtration dehydration.Described vacuum filtration dehydration adopts the static dewatering Principle vacuumized, and avoids the wearing and tearing of conventional centrifugal dehydration to gac material.Gac material after vacuum filtration dehydration, the dehydrating effect between its carbon granule can reach more than 70%.
Step S18, delivers to vibrated fluidized bed by the gac material after dehydration and carries out warm air drying and screening, obtain active carbon finished products.Gac material after dehydration is delivered to vibrated fluidized bed and carries out warm air drying, make gac material water ratio be reduced to 3% to 10%, sieve simultaneously, obtain active carbon finished products.The active carbon finished products obtained is carried out packaging of weighing, obtains bagged product.
Gac acid cleaning process described in the specific embodiment of the invention, by carrying out pickle solution immersion to gac material, recycling high pressure gas stir gac material, make gac material can abundant contact acid washing lotion, and pass into steam to heat gac material and pickle solution when pickling, gac material surface is more thoroughly reacted with pickle solution, and whole acid cleaning process can realize automatization non-stop run.Further, the present invention also provides a kind of gac pickling system, realizes whole acid cleaning process automatization, and can not cause detrimentally affect to environment.
Fig. 2 is specific embodiment of the invention gac pickling system schematic diagram.As shown in Figure 2, a kind of gac pickling system, comprise pickler 1, metering feed bin 2, acid fog absorption tower 3, water trap 4, vibrated fluidized bed 5, spent acid solution processing unit 6, described metering feed bin 2 is connected with the opening for feed 11 of described pickler 1, described acid fog absorption tower 3 is connected to the venting port 12 at described pickler 1 top, described water trap 4 is connected to the discharge port 13 bottom described pickler 1, and the discharge port of described water trap 4 then connects described vibrated fluidized bed 5.
Described pickler 1 comprises: tank body 100, and described tank body top is provided with opening for feed 11, acid inlet 101, water-in 102 and venting port 12, is provided with water port 103 and discharge port 13 bottom described tank body 100; Water back 200, is positioned at described tank body 100 bottom; Filter cylinder 300, is positioned at described tank body 100, is connected with water port 103; The inlet mouth 201 of described water back 200 can be drawn from described filter cylinder 300 internal space, also independently can draw inlet mouth.
The working process of above-mentioned gac pickling system is: in pickler 1, first put into a certain amount of industrial acid-washed acid (be preferably hydrochloric acid), and passes into high pressure gas and stir, and then adds water and spent pickling acid is diluted to certain density pickle solution; Then, metering feed bin 2 will be sent into through the gac material of pre-treatment (removal of impurities, screening), send in pickler 1 after metering; In pickler 1, pass into steam heat, and maintain certain temperature, then alternately pass into high pressure gas and steam, pickling is carried out to the gac material in pickler 1; Meanwhile, discharge after adopting acid fog absorption tower to carry out absorption process to the acid mist produced in acid cleaning process; After pickling terminates, gac material is sent into water extracter 4 and carries out vacuum filtration dehydration; After dehydration, gac material is sent into vibrated fluidized bed 5 and carries out vibration drying, after completing, screening is packaged into activated carbon product.The spent acid solution that pickling terminates rear generation enters spent acid solution processing unit 6 and processes from pickler 1, wherein treating processes is included in preliminary sedimentation tank and carries out primary deposition, carries out secondary sedimentation at second pond, then neutralization reaction is carried out at neutralization tank, finally obtain free of contamination water body, can be used for greening; And the throw out in preliminary sedimentation tank and second pond, the mainly gac material particles of powdery, then enter powdery carbon system and process.
Gac pickling system described in the specific embodiment of the invention, has following features: 1, produce without powdery carbon precipitation in pickler, without the need to cleaning, can realize semi-automatic continuous prodution; 2, operating procedure is simple, and labor strength is little; 3, whole system acid cleaning process carries out in the closed state, avoids the problems such as peripheral equipment corrosion and environmental pollution; 4, pickling speed is fast, efficiency is high, about 3 to 4 hours of whole pickling, water washing process used time, the pickling time of more traditional pickling process shortens 40%.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible variation and amendment, the scope that therefore protection scope of the present invention should define with the claims in the present invention is as the criterion.
Claims (9)
1. a gac acid cleaning process, is characterized in that, comprises the steps:
One pickler is provided, and injects a certain amount of water;
Add a certain amount of hydrochloric acid to described pickler, and pass into high pressure gas and stir, form certain density pickle solution;
Pretreated gac material metering is sent into pickler, soaks 5 to 15 minutes, and in immersion process, pass into high pressure gas stir;
In pickler, pass into steam, make described pickle solution be warming up to 100 degrees Celsius;
In pickler, alternately pass into high pressure gas and steam, and continue 1 ~ 2 hour;
Pickle solution in discharge pickler, and pass into water and wash;
Gac material after washing is delivered in water trap and carries out vacuum filtration dehydration;
Gac material after dehydration is delivered to vibrated fluidized bed and carries out warm air drying and screening, obtain active carbon finished products.
2. gac acid cleaning process according to claim 1, is characterized in that, described concentration of hydrochloric acid is massfraction 3% to 8%.
3. gac acid cleaning process according to claim 1, is characterized in that, described soak time is 10 minutes.
4. gac acid cleaning process according to claim 1, is characterized in that, maintains 30 minutes, more alternately pass into high pressure gas and steam after described pickle solution is warming up to 100 degrees Celsius.
5. the gac acid cleaning process according to claim 1 or 4, is characterized in that, in the process alternately passing into high pressure gas and steam, described pickle solution temperature maintains 60 to 80 degrees Celsius.
6. gac acid cleaning process according to claim 1, is characterized in that, described pickler is connected with acid fog absorption tower, and the acid mist produced in described acid fog absorption tower absorption acid cleaning process also carries out acid mist process.
7. gac acid cleaning process according to claim 1, is characterized in that, the concentration of described pickle solution is massfraction: 3% to 12%.
8. gac acid cleaning process according to claim 1, is characterized in that, described pickle solution is disposed to spent acid solution processing unit and carries out wastewater treatment.
9. a gac pickling system, it is characterized in that, comprise pickler, metering feed bin, acid fog absorption tower, water trap, vibrated fluidized bed, spent acid solution processing unit, described metering feed bin is connected with the opening for feed of described pickler, described acid fog absorption tower is connected to the venting port at described pickler top, described water trap is connected to the discharge port bottom described pickler, and the discharge port of described water trap then connects described vibrated fluidized bed;
Described pickler comprises: tank body, and described tank body top is provided with opening for feed, acid inlet, water-in and venting port, and described tank base is provided with water port and discharge port; Water back, is positioned at described tank body bottom; Filter cylinder, is positioned at described tank body, is connected with water port.
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| CN201310466389.4A CN103539112B (en) | 2013-10-09 | 2013-10-09 | Acid pickling process and acid pickling system for active carbon |
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| CN201310466389.4A CN103539112B (en) | 2013-10-09 | 2013-10-09 | Acid pickling process and acid pickling system for active carbon |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105923607A (en) * | 2016-05-05 | 2016-09-07 | 齐鲁工业大学 | Hydrochloric acid steel pickling wastewater resource utilization and waste activated carbon regeneration technology |
| CN108807172B (en) * | 2018-06-05 | 2021-04-27 | 济南固锝电子器件有限公司 | Semiconductor diode production process |
| CN109264717B (en) * | 2018-12-05 | 2024-01-30 | 诺曼利尔（青岛）环境能源技术有限公司 | Clean production process and system for activated carbon and coke |
| CN110117012B (en) * | 2019-05-14 | 2022-09-23 | 江苏哈特尔碳材料科技有限公司 | Granular activated carbon washing equipment |
| CN110255562B (en) * | 2019-05-23 | 2023-04-25 | 江苏哈特尔碳材料科技有限公司 | Activated carbon washing system and washing process |
| CN112678823A (en) * | 2021-01-26 | 2021-04-20 | 宁夏华辉活性炭股份有限公司 | Method for pickling activated carbon by using organic acid |
| CN113023728A (en) * | 2021-04-01 | 2021-06-25 | 山西新华活性炭有限公司 | Preparation method of PNP carbon |
| CN113245292B (en) * | 2021-04-20 | 2022-09-20 | 广东韩研活性炭科技股份有限公司 | Assembly line type activated carbon pickling and washing integrated machine |
| CN113582178B (en) * | 2021-07-30 | 2022-10-14 | 靖州县华荣活性炭有限责任公司 | Quick water rinsing and dewatering integrated device for preparing granular activated carbon |
| CN113813941A (en) * | 2021-10-22 | 2021-12-21 | 大同市贵义炭素有限公司 | Activated carbon treatment process and equipment |
| CN114308852A (en) * | 2021-12-23 | 2022-04-12 | 浙江颀正环保科技有限公司 | Method and device for controlling active carbon pickling based on solution pH value and conductivity |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201534778U (en) * | 2009-08-24 | 2010-07-28 | 紫金矿业集团股份有限公司 | Activated carbon purifying and impurity separating equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201534778U (en) * | 2009-08-24 | 2010-07-28 | 紫金矿业集团股份有限公司 | Activated carbon purifying and impurity separating equipment |
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