CN110255562B - Activated carbon washing system and washing process - Google Patents
Activated carbon washing system and washing process Download PDFInfo
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- CN110255562B CN110255562B CN201910436542.6A CN201910436542A CN110255562B CN 110255562 B CN110255562 B CN 110255562B CN 201910436542 A CN201910436542 A CN 201910436542A CN 110255562 B CN110255562 B CN 110255562B
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- C01B32/00—Carbon; Compounds thereof
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Abstract
The invention discloses an activated carbon washing system and a washing process, wherein the activated carbon washing system comprises a dispensing subsystem for accurately premixing washing liquid, a washing subsystem for realizing repeated rinsing of activated carbon, a water storage cooling subsystem for accelerating cooling, a purifying subsystem for recycling washing wastewater, a post-treatment discharging subsystem for deeply purifying tail water of washing activated carbon, and an electric appliance intelligent semi-automatic control subsystem for controlling the operation of the whole washing system; the invention has simple operation, high automation degree, small occupied area and clean rinsing, thoroughly solves the recycling and purifying discharge of the liquid medicine, reduces the working intensity and improves the working efficiency.
Description
Technical Field
The invention belongs to the technical field of deep processing of activated carbon, and particularly relates to an activated carbon washing system and a washing process.
Background
In practical application, the active carbon needs to be subjected to acid washing, water rinsing, water washing and polishing, surface coating, catalyst carrier and other deep processing, so as to reduce ash impurities and ferric salt of the granular active carbon, adjust the pH value of the granular active carbon, remove floating ash, increase strength and effectively carrier the catalyst, thereby improving the performance of the granular active carbon and increasing the added value.
At present, the traditional methods of acid washing, water rinsing, water washing polishing, surface coating and catalyst carrier mainly adopt a lagging manual or mechanical mode to heat and boil and wash in a large tank by introducing steam, stir and salvage, and then the steps are repeated by introducing clean water to rinse, and the defects are that the abrasion of granular activated carbon is serious, the washing water temperature cannot be accurately controlled, the labor consumption is high, the labor intensity is high, the pollution of black water generated in the washing process to the operation environment is serious, and the washing efficiency is low because of only rough operation.
The invention patent with publication number of CN201310466389.4 discloses an activated carbon pickling process and a pickling system, wherein the method comprises the following steps: providing a pickling device, and injecting a certain amount of water; adding a certain amount of hydrochloric acid into the pickling device, and introducing high-pressure gas to stir to form pickling solution with a certain concentration; metering the pretreated activated carbon material into an acid washing device, soaking and stirring; then introducing steam, heating, and alternately introducing high-pressure gas and steam for 1-2 hours; discharging pickling solution after pickling, and washing the activated carbon material with water; and then dehydrating, drying and sieving to obtain the active carbon finished product. The invention also provides an active carbon acid washing system. The active carbon pickling process and the pickling system can realize semi-automatic continuous work of the whole pickling process, realize sealing of the whole pickling process and avoid pollution to the environment and corrosion to peripheral equipment. However, the system and the process of the invention can not recycle and purify the liquid medicine, and can pollute the environment to a certain extent.
Disclosure of Invention
Aiming at the problems, the invention provides an activated carbon washing system and a washing process.
The technical scheme of the invention is as follows: an activated carbon washing system comprises a dispensing subsystem, a washing subsystem, a water storage cooling subsystem, a purifying subsystem, a post-treatment discharging subsystem and an electric appliance intelligent semi-automatic control subsystem for controlling the operation of the whole washing system;
the dispensing subsystem comprises a water storage tank for storing tap water and a medicine storage tank for storing washing liquid, and a medicine mixing tank connected below the water storage tank and the medicine storage tank and used for premixing the tap water and the washing liquid;
the washing subsystem comprises a washing tank, a charging port for adding active carbon is formed in the top of the washing tank, a dust collection and steam collection device is arranged above the charging port, a medicine adding port connected with the medicine mixing tank, and a liquid level detection port connected with a liquid level control device; the middle part of the washing tank is provided with a steam pipe connected with an external steam generator, a temperature detection port used for connecting a temperature control device, and an aeration disc connected with an external aerator; the bottom of the washing tank is provided with a discharge opening and a water filtering opening;
the water storage cooling subsystem comprises a cooling device and is used for carrying out heat exchange and cooling on the hot black water flowing out from the water filtering port;
the purification subsystem comprises a plate-and-frame filter press connected to the cooling device and is used for filtering and pressing black water into clear water and pumping the clear water to the medicine mixing tank;
the post-treatment discharge subsystem comprises a biological aeration tower and an acid-base neutralization tank connected with the cooling device and the dust collection and steam collection device, wherein the effluent of the acid-base neutralization tank is subjected to filter pressing by a plate-and-frame filter press and then is sent to the biological aeration tower for advanced treatment and then is discharged.
Further, the washing liquid consists of citric acid, phosphoric acid and acidic amino acid liquid according to the mass percentage of 15:10:3, and the pH=1-2. Compared with the traditional hydrochloric acid solution which is not easy to volatilize and is relatively friendly to human body, the cleaning strength of the surface of the activated carbon can be improved by adding a small amount of acidic amino acid liquid.
Further, the medicine mixing tank comprises a first stirrer arranged inside, a water inlet and a medicine inlet are arranged at the top of the medicine mixing tank, the water inlet is connected with the water storage tank, the medicine inlet is connected with the medicine storage tank, a medicine outlet is arranged at the bottom of the medicine mixing tank, electromagnetic flow meters are respectively arranged on the water inlet, the medicine inlet and the medicine outlet, and a circulating water inlet is transversely connected to the water inlet and used for circulating clean water after filter pressing treatment of a backflow plate-and-frame filter press.
Further, the cooling device comprises a cooling tank, a black water inlet is formed in the top of the cooling tank, a black water outlet and a temperature detector are arranged at the bottom of the cooling tank, a stirrer II inside the cooling tank, and a serpentine heat exchange tube arranged outside the cooling tank, wherein a water inlet of the serpentine heat exchange tube is connected with an external cooling water source, and a water outlet of the serpentine heat exchange tube is connected to the water storage tank. Compared with the traditional method of directly airing to the cooling temperature, the cooling is performed through the internal stirring and heat exchanging mode, so that the cooling can be performed in a closed space, the acid steam is prevented from escaping to pollute the working environment, the cooling time can be greatly shortened, and the hot water for cooling and heat exchanging can be sent back to the water storage tank for reuse.
Further, the dust collecting and steam collecting device comprises a cover body, an air extraction fan connected to the upper end of the cover body, and an aluminum foil tube connected with the air extraction fan. The active carbon dust during charging and the acid vapor during heating can be timely pumped away and purified, so that the working environment is purified, and the environment is protected.
Further, an acid-base neutralization box is provided with a liquid inlet, a steam inlet and a liquid outlet, the liquid inlet is connected with the water filtering port, an aluminum foil pipe is inserted in the steam inlet in a penetrating way, the liquid outlet is connected to the plate-and-frame filter press, and a stirrer III and a pH detector are arranged in the acid-base neutralization box.
Further, the top of the biological aeration tower is provided with a tail water inlet connected with the plate-and-frame filter press, biological rope filler and an aeration pipe are arranged in the biological aeration tower, the aeration pipe is connected with an aerator, the bottom of the biological aeration tower is provided with a water purifying outlet, and a resin filter is arranged in the water purifying outlet. And (3) deeply purifying the final tail water by utilizing microorganisms loaded on the biological rope filler, and finally filtering and adsorbing by a resin filter to finally reach the emission standard.
Further, the biological rope filler contains iron-philic bacteria. Ferric salt in the activated carbon wastewater is cleaned by ferric bacteria and degradation.
The process flow for washing the activated carbon by using the activated carbon washing system comprises the following steps:
s1: the method comprises the steps of respectively introducing tap water and washing liquid into a medicine mixing tank from a water storage tank and a medicine storage tank to prepare an acid solution with the concentration of 12-15wt%, adding the acid solution into the washing tank, adding active carbon into a charging hole, heating steam into the washing tank to 90-100 ℃ according to the volume ratio of the active carbon to the acid solution of 1:2-3, and simultaneously, using an aeration disc to charge high-pressure air to fully stir, wherein fly ash generated by charging and acid steam generated by heating are led into an acid-base neutralization tank containing alkaline neutralization liquid through a dust collection steam collection device;
s2: the single washing time is maintained for 20-30min, a water filtering port is opened to drain the washing waste black water into a cooling tank, the inside is continuously stirred by a stirrer, the heat exchange rate of the cooling water with the external serpentine heat exchange tube is increased, and the cooling water subjected to heat exchange flows into a water storage tank for reuse;
s3: when the waste black water in the cooling tank is cooled to 40-45 ℃, the waste black water is led into a plate-and-frame filter press for extrusion filtration, the waste black water is converted into reusable clear water, and the waste black water is led into a medicine mixing tank from a circulating water inlet for recycling;
s4: repeatedly washing for 10-20h, cooling the waste water from the last washing to 40-45 ℃ by a cooling tank, draining the waste water into an acid-base neutralization tank for acid-base neutralization until the pH value is 7, and then squeezing and filtering the neutralized waste water by a plate-and-frame filter press to obtain neutral clear water;
s5: introducing neutral clear water into a biological aeration tower, fully contacting with biological rope filler for 4-6h, performing aeration and oxygen supply through an aeration pipe, degrading ferric salt and organic matters in the water, and finally performing adsorption filtration through a resin filter arranged at a clear water outlet and discharging.
The beneficial effects of the invention are as follows: the dispensing subsystem can accurately pre-mix the washing liquid in an independent metering way, so that the quality of activated carbon rinsing is improved; the washing tank in the washing subsystem can realize repeated rinsing of the activated carbon, and the dust and the acid gas generated by the dust collection and gas collection device are collected and cleaned, so that the environment is protected; compared with the traditional water storage cooling subsystem which is directly aired to the cooling temperature, the cooling is carried out by the internal stirring and heat exchange mode, so that the cooling subsystem can be carried out in a closed space, further the acid steam is prevented from escaping and polluting the working environment, the cooling time can be greatly shortened, and the hot water for cooling and heat exchange can be sent back to the water storage tank for reuse; the purification subsystem of the invention utilizes a plate-and-frame filter press to filter-press black water into clear water for secondary recycling; the post-treatment discharge subsystem can deeply purify tail water of washing activated carbon, and finally filter and adsorb the tail water through a resin filter, so that the tail water finally reaches the discharge standard. In a word, the invention has simple operation, high automation degree, small occupied area and clean rinsing, thoroughly solves the recycling and purifying discharge of the liquid medicine, reduces the working intensity and improves the working efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a process flow diagram of the present invention.
Wherein, 1-water storage tank, 2-medicine storage tank, 3-medicine mixing tank, 4-washing tank, 5-charging port, 6-dust collecting and steam collecting device, 7-medicine adding port, 8-liquid level control device, 9-liquid level detection port, 10-steam generator, 11-steam pipe, 12-temperature control device, 13-temperature detection port, 14-aerator, 15-aeration disc, 16-discharge port, 17-water filtering port, 18-cooling device, 19-plate-and-frame filter press, 20-acid-base neutralization tank, 21-stirrer one, 22-water inlet, 23-medicine inlet, 24-medicine outlet, 25-electromagnetic flowmeter, 26-circulating water inlet, 27-cooling tank, 28-black water inlet, 29-black water outlet, 30-temperature detector, 31-stirrer two, 32-serpentine heat exchange pipe, 33-cover body, 34-fan, 35-aluminum foil pipe, 36-liquid inlet, 37-inlet, 38-liquid outlet, 39-stirrer three, 40-pH detector, 41-biological tail gas pipe, 42-biological filter, 43-aeration rope, 46-aeration rope, water inlet, and water outlet.
Detailed Description
Example 1
As shown in fig. 2, an activated carbon washing system comprises a dispensing subsystem, a washing subsystem, a water storage cooling subsystem, a purifying subsystem, a post-treatment discharge subsystem, and an electric intelligent semi-automatic control subsystem for controlling the operation of the whole washing system;
as shown in fig. 1, the dispensing subsystem comprises a water storage tank 1 for storing tap water, a medicine storage tank 2 for storing washing liquid, wherein the washing liquid is hydrochloric acid solution, and a medicine mixing tank 3 connected below the water storage tank 1 and the medicine storage tank 2 is used for premixing the tap water and the washing liquid; the medicine mixing tank 3 comprises a stirrer I21 arranged inside, a water inlet 22 and a medicine inlet 23 arranged at the top of the medicine mixing tank 3, the water inlet 22 is connected with the water storage tank 1, the medicine inlet 23 is connected with the medicine storage tank 2, a medicine outlet 24 arranged at the bottom of the medicine mixing tank 3, electromagnetic flow meters 25 are respectively arranged on the water inlet 22, the medicine inlet 23 and the medicine outlet 24, and a circulating water inlet 26 is transversely connected to the water inlet 22 and used for circulating clean water after filter pressing treatment of the backflow plate-and-frame filter press 19.
As shown in fig. 1, the washing subsystem comprises a washing tank 4, a charging port 5 for adding active carbon is arranged at the top of the washing tank 4, a dust collecting and steam collecting device 6 arranged above the charging port 5, a medicine adding port 7 connected with a medicine mixing tank 3, and a liquid level detection port 9 connected with a liquid level control device 8; the middle part of the washing tank 4 is provided with a steam pipe 11 connected with an external steam generator 10, a temperature detection port 13 used for connecting a temperature control device 12, and an aeration disc 15 connected with an external aerator 14; the bottom of the washing tank 4 is provided with a discharge opening 16 and a water filtering opening 17; the dust collecting and collecting device 6 comprises a cover body 33, an air extraction fan 34 connected to the upper end of the cover body 33, and an aluminum foil tube 35 connected with the air extraction fan 34. The active carbon dust during charging and the acid vapor during heating can be timely pumped away and purified, so that the working environment is purified, and the environment is protected.
As shown in fig. 1, the water storage cooling subsystem comprises a cooling device 18 for heat exchanging and cooling the hot black water flowing out of the water filtering port 17; the cooling device 18 comprises a cooling tank 27, a black water inlet 28 is formed in the top of the cooling tank 27, a black water outlet 29 and a temperature detector 30 are formed in the bottom of the cooling tank 27, a second stirrer 31 arranged inside the cooling tank 27, and a serpentine heat exchange tube 32 arranged outside the cooling tank 27, wherein a water inlet of the serpentine heat exchange tube 32 is connected with an external cooling water source, and a water outlet of the serpentine heat exchange tube 32 is connected to the water storage tank 1. Compared with the traditional method of directly airing to the cooling temperature, the cooling is carried out by the mode of internal stirring and heat exchange, so that the cooling can be carried out in a closed space, further the acid steam is prevented from escaping to pollute the working environment, the cooling time can be greatly shortened, and the hot water of cooling and heat exchange can be sent back to the water storage tank 1 for reuse.
As shown in fig. 1, the purification subsystem comprises a plate-and-frame filter press 19 connected to a cooling device 18, and is used for filtering and pressing black water into clear water and pumping the clear water to the medicine mixing tank 3;
as shown in fig. 1, the post-treatment discharge subsystem comprises a biological aeration tower 41 and an acid-base neutralization tank 20 connected with the cooling device 18 and the dust collection and steam collection device 6, wherein the effluent of the acid-base neutralization tank 20 is filtered by a plate-and-frame filter press 19 and then sent to the biological aeration tower 41 for advanced treatment and then discharged. The acid-base neutralization tank 20, the acid-base neutralization tank 20 is provided with a liquid inlet 36, a steam inlet 37 and a liquid outlet 38, the liquid inlet 36 is connected with the water filtering port 17, an aluminum foil pipe 35 is inserted in the steam inlet 37 in a penetrating way, the liquid outlet 38 is connected to the plate-and-frame filter press 19, and a stirrer III 39 and a pH detector 40 are arranged in the acid-base neutralization tank 20. The top of the biological aeration tower 41 is provided with a tail water inlet 42 connected with the plate-and-frame filter press 19, the biological aeration tower 41 is internally provided with a biological rope filler 43 and an aeration pipe 44, the aeration pipe 44 is connected with the aerator 14, and the biological rope filler contains iron-philic bacteria. Ferric salt in the activated carbon wastewater is cleaned by ferric bacteria and degradation. The bottom of the biological aeration tower 41 is provided with a purified water outlet 45, and a resin filter 46 is arranged in the purified water outlet 45. The final tail water is deeply purified by the microorganisms loaded on the bio-rope packing 43, and finally filtered and adsorbed by the resin filter 46, thereby finally reaching the discharge standard.
The intelligent semi-automatic control system of the electric appliance in the embodiment can mainly control the operation flow of the whole process, and consists of various solenoid valves, various electric valves, a PH controller, various magnetic flap level meters, high-low liquid level control floating balls, a thumb switch, various acid-alkali-resistant water pumps, a temperature controller, various control cabinets (comprising programmable PLC control programs) and the like, so that the operation of the whole process flow is intelligently controlled, and the intelligent control system has the advantages of being safe, scientific, convenient to operate, labor-saving and the like.
The process flow for washing the activated carbon by using the activated carbon washing system comprises the following steps:
s1: the medicine mixing tank 3 respectively introduces tap water and washing liquid from the water storage tank 1 and the medicine storage tank 2 to prepare an acid solution with the concentration of 14wt%, then the acid solution is added into the washing tank 4, activated carbon is added into the charging port 5, the volume ratio of the activated carbon to the acid solution is 1:2.5, steam is introduced into the washing tank 4 to be heated to 90 ℃, meanwhile, high-pressure air is filled into the aeration disc 15 to be fully stirred, and fly ash generated by charging and acid vapor generated by heating are led into the acid-base neutralization tank 20 containing alkaline neutralization liquid through the dust collection and steam collection device 6;
s2: the single washing time is maintained for 30min, the water filtering port 17 is opened to drain the washing waste black water into the cooling tank 27, the inside is continuously stirred by the stirrer I21, the heat exchange rate of the cooling water with the external serpentine heat exchange tube 32 is increased, and the cooling water subjected to heat exchange flows into the water storage tank 1 for reuse;
s3: when the waste black water in the cooling tank 27 is cooled to 40 ℃, the waste black water is led into the plate-and-frame filter press 19 for extrusion filtration, the waste black water is converted into reusable clear water, and the waste black water is led into the medicine mixing tank 3 from the circulating water inlet 26 for recycling;
s4: repeatedly washing for 15 hours, when the waste water from the last washing is cooled to 40 ℃ by a cooling tank 27, draining the waste water into an acid-base neutralization tank 20 for acid-base neutralization until the pH value is 7, and then squeezing and filtering the neutralized waste water by a plate-and-frame filter press 19 to obtain neutral clear water;
s5: the neutral clear water is led into the biological aeration tower 41, fully contacts with the biological rope filler 43 for 5 hours, carries out aeration and oxygen supply through the aeration pipe 44, degrades ferric salt and organic matters in the water, and finally is discharged after adsorption filtration through the resin filter 46 arranged at the clear water outlet 45.
Example 2
This embodiment is substantially the same as embodiment 1 except that:
the washing liquid consists of citric acid, phosphoric acid and acidic amino acid liquid according to the mass percentage of 15:10:3, and the pH=1-2. Compared with the traditional hydrochloric acid solution which is not easy to volatilize and is relatively friendly to human body, the cleaning strength of the surface of the activated carbon can be improved by adding a small amount of acidic amino acid liquid.
The activated carbon produced in example 1, example 2, and comparative example 1 (conventional process), comparative example 2 (system and process of publication No. CN 201310466389.4) of the present invention was subjected to performance test according to GB test standard, and the discharged tail water was subjected to pollution standard test. The detection method is spot check, the number of samples of the two groups of tests is 100, the average qualification rate of the samples is evaluated, and the evaluation results are shown in table 1:
TABLE 1
The present invention is not limited to the above-described specific embodiments, and various modifications are possible within the scope of the present invention without inventive work by those skilled in the art from the above-described concepts.
Claims (1)
1. The activated carbon washing process is characterized in that the activated carbon washing process utilizes an activated carbon washing system to wash, and the activated carbon washing system comprises a dispensing subsystem, a washing subsystem, a water storage cooling subsystem, a purifying subsystem, a post-treatment discharging subsystem and an electric appliance intelligent semi-automatic control subsystem for controlling the operation of the whole washing system;
the dispensing subsystem comprises a water storage tank (1) for storing tap water, a medicine storage tank (2) for storing washing liquid, and a medicine mixing tank (3) connected below the water storage tank (1) and the medicine storage tank (2) and used for premixing the tap water and the washing liquid;
the washing subsystem comprises a washing tank (4), a charging port (5) for adding active carbon is formed in the top of the washing tank (4), a dust collection and steam collection device (6) arranged above the charging port (5), a medicine adding port (7) connected with the medicine mixing tank (3) and a liquid level detection port (9) connected with a liquid level control device (8); the middle part of the washing tank (4) is provided with a steam pipe (11) connected with an external steam generator (10), a temperature detection port (13) used for connecting a temperature control device (12), and an aeration disc (15) connected with an external aerator (14); the bottom of the washing tank (4) is provided with a discharge opening (16) and a water filtering opening (17);
the water storage cooling subsystem comprises a cooling device (18) for carrying out heat exchange and cooling on the hot black water flowing out of the water filtering port (17);
the purification subsystem comprises a plate-and-frame filter press (19) connected to the cooling device (18) and is used for filtering and pressing black water into clear water and pumping the clear water to the medicine mixing tank (3);
the post-treatment discharge subsystem comprises a biological aeration tower (41) and an acid-base neutralization tank (20) connected with the cooling device (18) and the dust collection and steam collection device (6), wherein the effluent of the acid-base neutralization tank (20) is subjected to filter pressing by a plate-and-frame filter press (19) and then is sent to the biological aeration tower (41) for advanced treatment and then is discharged;
the medicine mixing tank (3) comprises a stirrer I (21) arranged inside, a water inlet (22) and a medicine inlet (23) which are arranged at the top of the medicine mixing tank (3), the water inlet (22) is connected with the water storage tank (1), the medicine inlet (23) is connected with the medicine storage tank (2), a medicine outlet (24) is arranged at the bottom of the medicine mixing tank (3), electromagnetic flow meters (25) are respectively arranged on the water inlet (22), the medicine inlet (23) and the medicine outlet (24), and a circulating water inlet (26) is transversely connected to the water inlet (22) and used for refluxing circulating clear water after filter pressing treatment of the plate-and-frame filter press (19);
the cooling device (18) comprises a cooling tank (27), a black water inlet (28) is formed in the top of the cooling tank (27), a black water outlet (29) and a temperature detector (30) are formed in the bottom of the cooling tank (27), a stirrer II (31) inside the cooling tank (27) and a serpentine heat exchange tube (32) arranged outside the cooling tank (27), a water inlet of the serpentine heat exchange tube (32) is connected with an external cooling water source, and a water outlet of the serpentine heat exchange tube (32) is connected to the water storage tank (1);
the dust collection and steam collection device (6) comprises a cover body (33), an air extraction fan (34) connected to the upper end of the cover body (33), and an aluminum foil tube (35) connected with the air extraction fan (34);
the acid-base neutralization tank (20), a liquid inlet (36), a steam inlet (37) and a liquid outlet (38) are formed in the acid-base neutralization tank (20), the liquid inlet (36) is connected with the water filtering port (17), the steam inlet (37) is internally penetrated and inserted into the aluminum foil pipe (35), the liquid outlet (38) is connected to the plate-and-frame filter press (19), and a stirrer III (39) and a pH detector (40) are arranged in the acid-base neutralization tank (20);
the top of the biological aeration tower (41) is provided with a tail water inlet (42) connected with the plate-and-frame filter press (19), biological rope filler (43) and an aeration pipe (44) are arranged in the biological aeration tower (41), the aeration pipe (44) is connected with the aerator (14), the bottom of the biological aeration tower (41) is provided with a purified water outlet (45), and a resin filter (46) is arranged in the purified water outlet (45);
the biological rope filler contains iron-philic bacteria;
the active carbon washing system carries out the process flow of active carbon washing and comprises the following steps:
s1: the method comprises the steps that tap water and washing liquid are respectively introduced into a medicine mixing tank (3) from a water storage tank (1) and a medicine storage tank (2) to prepare an acid solution with the concentration of 12-15 and wt%, then the acid solution is added into a washing tank (4), activated carbon is added into a charging port (5), the volume ratio of the activated carbon to the acid solution is 1:2-3, steam is introduced into the washing tank (4) to heat to 90-100 ℃, high-pressure air is simultaneously filled into an aeration disc (15) to be fully stirred, and fly ash generated by charging and acid-base neutralization tank (20) containing alkaline neutralization liquid are led to through a dust collecting and steam collecting device (6);
s2: the single washing time is maintained for 20-30min, the water filtering port (17) is opened to drain the washing waste black water into the cooling tank (27), the inside is continuously stirred by the stirrer I (21), the heat exchange rate of the cooling water with the external serpentine heat exchange tube (32) is increased, and the cooling water subjected to heat exchange flows into the water storage tank (1) for reuse;
s3: when the waste black water in the cooling tank (27) is cooled to 40-45 ℃, the waste black water is led into the plate-and-frame filter press (19) for extrusion filtration, the waste black water is converted into reusable clear water, and the clear water is led into the medicine mixing tank (3) from the circulating water inlet (26) for recycling;
s4: repeatedly washing, wherein the total duration is 10-20h, when the waste water from the last washing is cooled to 40-45 ℃ by a cooling tank (27), the waste water is led into an acid-base neutralization tank (20) for acid-base neutralization until the pH value is 7, and then the neutralized waste water is extruded and filtered by a plate-and-frame filter press (19) to be neutral clear water;
s5: introducing the neutral clear water into the biological aeration tower (41), fully contacting 4-6h with biological rope filler (43), aerating and supplying oxygen through an aeration pipe (44), degrading ferric salt and organic matters in the water, and finally adsorbing and filtering through a resin filter (46) arranged at a purified water outlet (45) and discharging;
the washing liquid consists of citric acid, phosphoric acid and acidic amino acid liquid according to the mass percentage of 15:10:3, and the pH value of the washing liquid is=1-2.
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| CN113275306B (en) * | 2021-04-19 | 2022-09-23 | 龙岩市华研活性炭科技有限公司 | Dynamic rotational flow active carbon pickling machine |
| CN114073943A (en) * | 2021-11-25 | 2022-02-22 | 宁夏锦鹏炭业有限公司 | Powdered activated carbon regeneration device based on airflow heating and regeneration process thereof |
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