CN112194188A - Preparation process of high-purity polyaluminum ferric chloride for water purification treatment - Google Patents
Preparation process of high-purity polyaluminum ferric chloride for water purification treatment Download PDFInfo
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- CN112194188A CN112194188A CN202011023066.4A CN202011023066A CN112194188A CN 112194188 A CN112194188 A CN 112194188A CN 202011023066 A CN202011023066 A CN 202011023066A CN 112194188 A CN112194188 A CN 112194188A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/10—Halides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- Environmental & Geological Engineering (AREA)
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a preparation process of high-purity polyaluminum ferric chloride for water purification treatment, which comprises the following steps: the method comprises the steps of starting a cooling water motor, starting an acid mist absorption tower, starting a hydrochloric acid pump, pumping 2.8 parts of hydrochloric acid into a reaction kettle, starting a stirrer after the hydrochloric acid is pumped, adding 0.85 ton of aluminum hydroxide, closing a manhole cover, closing all valves on the reaction kettle, starting a steam valve, closing the steam valve when the pressure in the reaction kettle rises to 0.04MPa, opening an exhaust valve to exhaust, closing the exhaust valve after the pressure drops to 0, continuously opening the steam valve, recording time, and closing the steam valve when the pressure in the reaction kettle rises to 0.2 MPa. According to the preparation process of the high-purity polyaluminum ferric chloride for water purification treatment, the aluminum salt and the ferric salt are combined to produce the composite polyaluminum ferric chloride, so that the problem that the residual aluminum in the effluent of a drinking water plant exceeds the standard can be effectively solved.
Description
Technical Field
The invention relates to the technical field of industrial preparation, in particular to a preparation process of high-purity polyaluminum ferric chloride for water purification treatment.
Background
At present, polyaluminium chloride is generally used for treating suspended matters in a drinking water treatment system taking yellow river water as a water source, so that the purpose of qualified effluent turbidity is achieved, but when the water quality changes sometimes, the problem that the residual aluminium in effluent exceeds the standard is solved after the polyaluminium chloride is added, aiming at the problem, the polyaluminium chloride iron product is prepared by compounding aluminium salt and ferric salt in company, the problem that the chromaticity of the effluent exceeds the standard after the ferric salt is added independently is avoided, and the problem that the residual aluminium in the effluent exceeds the standard after the aluminium salt is added independently is also avoided, therefore, the preparation process of the high-purity polyaluminium chloride iron for water purification treatment is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation process of high-purity polyaluminum ferric chloride for water purification treatment, which comprises the following steps:
firstly, starting a cooling water motor, starting an acid mist absorption tower, starting a hydrochloric acid pump, pumping 2.8-square hydrochloric acid into a reaction kettle, starting a stirrer after the hydrochloric acid is pumped, adding 0.85 ton of aluminum hydroxide, sealing a manhole cover, closing all valves on the reaction kettle, starting a steam valve, closing the steam valve when the pressure in the reaction kettle rises to 0.04MPa, opening the steam valve to exhaust, closing the exhaust valve after the pressure drops to 0, continuously opening the steam valve, recording time, closing the steam valve when the pressure in the reaction kettle rises to 0.2MPa, reacting for 6 hours, keeping the pressure at 0.2MPAa in the reaction process, opening the exhaust valve to exhaust after 6 hours, adding 1.4 tons of water after the pressure in the reaction kettle drops to 0, stirring for 10 minutes after the water is added, putting primary liquid into a precipitation tank, and putting the primary liquid into a transfer tank for standby after 12 hours;
and step two, pumping 2.8 square primary liquid into the reaction kettle, opening a steam valve, heating the primary liquid in the reaction kettle to about 70 ℃, adding 0.6 ton of calcium aluminate powder, closing all valves on the reaction kettle, closing a manhole cover, opening the steam valve, recording the time when the pressure in the reaction kettle rises to 0.1MPa, reacting for 2 hours, and keeping the pressure in the reaction kettle at 0.1MPa in the reaction process. After reacting for 2 hours, opening an exhaust valve, adding 1.5 tons of water when the pressure in the reaction kettle is reduced to 0, stirring for 10 minutes, and putting into a pre-forming pool;
thirdly, after the product in the pre-forming pool is precipitated for 12 hours, pumping the product into a plate-and-frame filter press for filter pressing, and putting the liquid generated after filter pressing into a stirring barrel;
step four, preparing a 3% ferric trichloride solution, adding the ferric trichloride solution into a stirring barrel according to the proportion of 1:10, stirring the mixture for 30 minutes, putting the mixture into a finished product pool, curing the mixture for 12 hours to obtain a finished product polyaluminum ferric chloride, and finishing the preparation of the polyaluminum ferric chloride.
Preferably, the casing of the hydrochloric acid pump is made of a metal casing lined with Fluorinated Ethylene Propylene (FEP), and the flow passage components are all made of plastic alloys (PTFE and FEP).
Preferably, the medium temperature of the steam valve is between-20 ℃ and +180 ℃.
Preferably, the reaction kettle is made of SUS 304.
Preferably, the calcium aluminate powder mainly comprises CaO, AL2O3 and Fe2O 3.
Compared with the prior art, the invention has the following beneficial effects: according to the preparation process of the high-purity polyaluminum ferric chloride for water purification treatment, the aluminum salt and the ferric salt are combined to produce the composite polyaluminum ferric chloride, so that the problem that the residual aluminum in the effluent of a drinking water plant exceeds the standard can be effectively solved.
Drawings
FIG. 1 is a flow chart of the preparation process of high purity polyaluminum ferric chloride for water purification treatment of the present invention;
FIG. 2 is a flow chart of the production of the product of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1-2, a process for preparing high purity polyaluminum ferric chloride for water purification treatment includes the following steps:
firstly, starting a cooling water motor, starting an acid mist absorption tower, starting a hydrochloric acid pump, pumping 2.8-square hydrochloric acid into a reaction kettle, starting a stirrer after the hydrochloric acid is pumped, adding 0.85 ton of aluminum hydroxide, sealing a manhole cover, closing all valves on the reaction kettle, starting a steam valve, closing the steam valve when the pressure in the reaction kettle rises to 0.04MPa, opening the steam valve to exhaust, closing the exhaust valve after the pressure drops to 0, continuously opening the steam valve, recording time, closing the steam valve when the pressure in the reaction kettle rises to 0.2MPa, reacting for 6 hours, keeping the pressure at 0.2MPAa in the reaction process, opening the exhaust valve to exhaust after 6 hours, adding 1.4 tons of water after the pressure in the reaction kettle drops to 0, stirring for 10 minutes after the water is added, putting primary liquid into a precipitation tank, and putting the primary liquid into a transfer tank for standby after 12 hours;
and step two, pumping 2.8 square primary liquid into the reaction kettle, opening a steam valve, heating the primary liquid in the reaction kettle to about 70 ℃, adding 0.6 ton of calcium aluminate powder, closing all valves on the reaction kettle, closing a manhole cover, opening the steam valve, recording the time when the pressure in the reaction kettle rises to 0.1MPa, reacting for 2 hours, and keeping the pressure in the reaction kettle at 0.1MPa in the reaction process. After reacting for 2 hours, opening an exhaust valve, adding 1.5 tons of water when the pressure in the reaction kettle is reduced to 0, stirring for 10 minutes, and putting into a pre-forming pool;
thirdly, after the product in the pre-forming pool is precipitated for 12 hours, pumping the product into a plate-and-frame filter press for filter pressing, and putting the liquid generated after filter pressing into a stirring barrel;
step four, preparing a 3% ferric trichloride solution, adding the ferric trichloride solution into a stirring barrel according to the proportion of 1:10, stirring the mixture for 30 minutes, putting the mixture into a finished product pool, curing the mixture for 12 hours to obtain a finished product polyaluminum ferric chloride, and finishing the preparation of the polyaluminum ferric chloride.
The casing of the hydrochloric acid pump is made of metal casing, inner lining Fluorinated Ethylene Propylene (FEP) and flow passage components which are all made of plastic alloy (PTFE and FEP).
The medium temperature of the steam valve is between minus 20 ℃ and plus 180 ℃.
The reaction kettle is made of SUS 304.
The main components of the calcium aluminate powder are CaO, AL2O3 and Fe2O 3.
It should be noted that the technological reaction procedures of the preparation are as follows: 1. before adding hydrochloric acid, a cooling water motor is started, an acid mist absorption tower is started, a hydrochloric acid pump is started, 2.8 parts of hydrochloric acid is added into a reaction kettle, after the hydrochloric acid is added, a stirrer is started, 0.85 ton of aluminum hydroxide is added, a manhole cover is closed, all valves on the reaction kettle are closed, a steam valve is started, when the pressure in the reaction kettle rises to 0.04MPa, the steam valve is closed, an exhaust valve is opened for exhausting, after the pressure is reduced to 0, the exhaust valve is closed, the steam valve is continuously opened, the time is recorded, when the pressure in the reaction kettle rises to 0.2MPa, the steam valve is closed, the reaction is carried out for 6 hours, the pressure is kept at 0.2MPAa in the reaction process, after 6 hours, the exhaust valve is opened for exhausting, after the pressure in the reaction kettle is reduced to 0, 1.4 tons of water are added, after the water is added, the stirring is carried out for 10 minutes, the primary liquid is placed into a.
2. Pumping 2.8 square primary liquid into a reaction kettle, opening a steam valve, heating the primary liquid in the reaction kettle to about 70 ℃, adding 0.6 ton of calcium aluminate powder, closing all valves on the reaction kettle, closing a manhole cover, opening the steam valve, recording the time when the pressure in the reaction kettle rises to 0.1MPa, reacting for 2 hours, and keeping the pressure in the reaction kettle at 0.1MPa in the reaction process. After reacting for 2 hours, opening an exhaust valve, adding 1.5 tons of water when the pressure in the reaction kettle is reduced to 0, stirring for 10 minutes, and then putting into a preform pool.
3. And (3) after the product is precipitated for 12 hours in the preformed product tank, pumping the product into a plate-and-frame filter press for filter pressing, and putting the liquid generated after filter pressing into a stirring barrel.
4. Preparing a 3% ferric trichloride solution, adding the solution into a stirring barrel according to the proportion of 1:10, stirring for 30 minutes, putting the mixture into a finished product pool, and curing for 12 hours to obtain the finished product polyaluminum ferric chloride.
The invention combines aluminum salt and ferric salt to produce the compound polyaluminum ferric chloride, and can effectively solve the problem that the residual aluminum in the effluent of a drinking water plant exceeds the standard.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A preparation process of high-purity polyaluminum ferric chloride for water purification treatment is characterized by comprising the following steps:
firstly, before adding hydrochloric acid, starting a reaction kettle to cool a water motor, starting an acid mist absorption tower, starting a hydrochloric acid pump, pumping 2.8-square hydrochloric acid into the reaction kettle, and after the hydrochloric acid is pumped, starting the stirrer, adding 0.85 ton of aluminum hydroxide, closing the manhole cover, closing all valves on the reaction kettle, opening a steam valve, and when the pressure in the reaction kettle rises to 0.04MPa, closing the steam valve, opening the exhaust valve to exhaust, closing the exhaust valve after the pressure is reduced to 0, continuing to open the steam valve, recording time, when the pressure in the reaction kettle rises to 0.2MPa, the steam valve is closed, the reaction is carried out for 6 hours, the pressure is kept at 0.2MPAa in the reaction process, after 6 hours, opening an exhaust valve to exhaust, adding 1.4 tons of water after the pressure in the reaction kettle is reduced to 0, stirring for 10 minutes after the water is added, putting the primary liquid into a precipitation tank, and putting the primary liquid into a transfer tank for standby after 12 hours;
and step two, pumping 2.8 square primary liquid into the reaction kettle, opening a steam valve, heating the primary liquid in the reaction kettle to about 70 ℃, adding 0.6 ton of calcium aluminate powder, closing all valves on the reaction kettle, closing a manhole cover, opening the steam valve, recording the time when the pressure in the reaction kettle rises to 0.1MPa, reacting for 2 hours, and keeping the pressure in the reaction kettle at 0.1MPa in the reaction process. After reacting for 2 hours, opening an exhaust valve, adding 1.5 tons of water when the pressure in the reaction kettle is reduced to 0, stirring for 10 minutes, and putting into a pre-forming pool;
thirdly, after the product in the pre-forming pool is precipitated for 12 hours, pumping the product into a plate-and-frame filter press for filter pressing, and putting the liquid generated after filter pressing into a stirring barrel;
step four, preparing a 3% ferric trichloride solution, adding the ferric trichloride solution into a stirring barrel according to the proportion of 1:10, stirring the mixture for 30 minutes, putting the mixture into a finished product pool, curing the mixture for 12 hours to obtain a finished product polyaluminum ferric chloride, and finishing the preparation of the polyaluminum ferric chloride.
2. The preparation process of high-purity polyaluminum ferric chloride for water purification treatment according to claim 1, wherein the process comprises the following steps: the casing of the hydrochloric acid pump is made of metal casing lining Fluorinated Ethylene Propylene (FEP) and the flow passage components are all made of plastic alloys (PTFE and FEP).
3. The preparation process of high-purity polyaluminum ferric chloride for water purification treatment according to claim 1, wherein the process comprises the following steps: the medium temperature of the steam valve is between minus 20 ℃ and plus 180 ℃.
4. The preparation process of high-purity polyaluminum ferric chloride for water purification treatment according to claim 1, wherein the process comprises the following steps: the reaction kettle is made of SUS 304.
5. The preparation process of high-purity polyaluminum ferric chloride for water purification treatment according to claim 1, wherein the process comprises the following steps: the main components of the calcium aluminate powder are CaO, AL2O3 and Fe2O 3.
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| CN202011023066.4A CN112194188A (en) | 2020-09-25 | 2020-09-25 | Preparation process of high-purity polyaluminum ferric chloride for water purification treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336273A (en) * | 2021-07-18 | 2021-09-03 | 高州市名桂化工有限公司 | Method for producing polyaluminum ferric chloride by using pyrite slag |
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|---|---|---|---|---|
| CN113336273A (en) * | 2021-07-18 | 2021-09-03 | 高州市名桂化工有限公司 | Method for producing polyaluminum ferric chloride by using pyrite slag |
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Application publication date: 20210108 |