CN112591901A - Mine water advanced treatment agent and use method thereof - Google Patents
Mine water advanced treatment agent and use method thereof Download PDFInfo
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- CN112591901A CN112591901A CN202011459063.5A CN202011459063A CN112591901A CN 112591901 A CN112591901 A CN 112591901A CN 202011459063 A CN202011459063 A CN 202011459063A CN 112591901 A CN112591901 A CN 112591901A
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- sodium citrate
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
- C02F5/04—Softening water by precipitation of the hardness using phosphates
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/105—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a mine water advanced treatment agent and a use method thereof, wherein the mine water advanced treatment agent comprises the following components in parts by weight: 50-80 parts of sodium tripolyphosphate and 20-50 parts of sodium citrate, wherein each part of the medicament in the weight part ratio can be treated by 0.5 multiplied by 107～1.5×107Part of water; the use method of the mine water deep treatment agent comprises the following steps: mixing sodium tripolyphosphate and sodium citrate; adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution; adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution; the solution in the storage tank is uniformly stirred by a metering pumpAnd putting the water into mine water to be treated. Compared with the reverse osmosis membrane treatment process, the mine water advanced treatment medicament and the use method thereof are simple, convenient to operate and easy to control, and the treatment cost is only 50-60% of that of the reverse osmosis membrane treatment method.
Description
Technical Field
The invention relates to the technical field of mine water treatment, in particular to a mine water advanced treatment agent and a using method thereof.
Background
Firstly, formation and harm of high-salinity mine water:
the high-salinity mine water generally refers to mine water with the salinity of more than 1000 mg/L. The salt content of high-salt mine water in coal mines in China is generally 2000-6000 mg/L, and the salt content of a small amount of mine water in mines is more than 6000 mg/L. Most of the mine water is neutral or alkaline and bitter, so it is also called bitter. The salt content of the mine water is mainly from Ca2+，Mg2+，Na+，K+，SO4 2-，HCO3 -，Cl-Plasma, the hardness tends to be high.
The main reasons for producing mine water with high salt content are as follows:
because the rainfall in partial areas of China is less, the evaporation capacity is large, the climate is dry, the evaporation concentration is strong, the salinity in the stratum is increased, the conditions of groundwater supply, runoff and drainage are poor, the mineralization degree of the groundwater is higher, and the mineralization degree of the mine water is also high; when the coal-based stratum contains a large amount of carbonate rock stratum and sulfate thin layer, the mine water is exploited along with the coal bed and widely contacted with the underground water, so that the dissolution of soluble minerals is intensified, and Ca in the mine water is enabled to be2+，Mg2+，Na+，K+，SO4 2-，HCO3 -Increasing; when a high-sulfur coal seam is mined, sulfide is gasified to generate free acid, and the free acid is subjected to neutralization reaction with carbonate minerals and alkaline substances to ensure that Ca in mine water2+，Mg2+，SO4 2-Plasma is increased; in some areas, the mine water is highly mineralized due to the invasion of underground salt water into the coal field.
The high-salt mine water is directly discharged without being treated, and certain harm is brought to the ecological environment. The method mainly comprises the steps of rising the salt content of river water, raising the shallow underground water level, breeding salinization in soil, weakening the tree vigor of salt and alkali resistance, reducing the yield of crops and the like. It also affects the industrial production in the region, because many industrial processes cannot use water with high salt content, and if the industrial processes are used, the salt content in the water must be reduced, so that the cost is increased. If the underground water is not used, a large amount of underground water is exploited, underground water resources are in short supply, and the economic development of the region is seriously influenced.
The high-salinity mine water is mainly used in regions lacking water resources in China, the high-salinity mine water is treated and utilized, the environmental pollution caused by mine water discharge can be avoided, the problem of shortage of water for mining areas can be solved, compared with the water quality of common mine water, the high-salinity mine water discharged from coal mines has the characteristic of high salinity, and also contains common pollutants such as suspended matters and the like, the suspended matters and the like can be removed through conventional coagulating sedimentation and filtration, but various ions in the high-salinity mine water must be removed through other ways. Desalination is a key process for treating high salinity purified water, and may also be referred to as advanced treatment. The common desalination advanced treatment technologies include ion exchange, distillation, electrodialysis, reverse osmosis, drug degradation, and the like.
At present, adding chemicals to degrade soluble salt of mine water is one of the feasible methods for treating high-salt mine water in China. Due to the unique property of the mine water, in order to remove the total salt content, no matter how many methods are adopted, the total hardness of the sewage needs to be removed in the first step, calcium and magnesium ions in the sewage can block the filtering equipment, so that the backwashing frequency is increased, the utilization rate of the equipment is low, and the normal operation cannot be realized.
The traditional sewage hardness removal technology is a double subtraction method, namely calcium oxide and sodium carbonate, the method is feasible in the past, but is not feasible at present, firstly, lime pollution is caused due to large using amount, secondly, the using amount is large, labor cost is too high, thirdly, precipitates are too much and cannot be treated, fourthly, salt is removed, but salt is increased too much, and the intention is violated.
Disclosure of Invention
The invention aims to overcome the prior defects and provides a mine water deep treatment agent and a use method thereof, wherein sodium tripolyphosphate and sodium citrate are mixed according to a certain proportion, the total hardness is between 400 and 700mg/L under the alkalescent condition, the mine water is added according to two to four thousandths of the materials, and after a few minutes, the total hardness of the mine water can be reduced to be below 200mg/L, so that the mine water can easily pass through a filtering device.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a mine water advanced treatment agent, which comprises the following components in parts by weight:
50-80 parts of sodium tripolyphosphate
20-50 parts of sodium citrate
The weight ratio of the above componentsCan treat 0.5X 10 of the medicine7～1.5×107Parts of water.
As a preferable scheme, the mine water advanced treatment agent comprises the following components in parts by weight:
80 portions of sodium tripolyphosphate
20 portions of sodium citrate
The weight ratio of each part of the medicament can be 1.5 multiplied by 107Parts of water.
As a preferable scheme, the mine water advanced treatment agent comprises the following components in parts by weight:
50 portions of sodium tripolyphosphate
50 portions of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water. .
As a preferable scheme, the mine water advanced treatment agent comprises the following components in parts by weight:
60 parts of sodium tripolyphosphate
40 parts of sodium citrate
The weight ratio of each part of the medicament can be 1.5 multiplied by 107Parts of water.
As a preferable scheme, the mine water advanced treatment agent comprises the following components in parts by weight:
70 portions of sodium tripolyphosphate
30 portions of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water.
As a preferable scheme, the mine water advanced treatment agent comprises the following components in parts by weight:
75 portions of sodium tripolyphosphate
25 portions of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water.
A use method of a mine water advanced treatment agent comprises the following steps:
s1: mixing sodium tripolyphosphate and sodium citrate;
s2: adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution;
s3: adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution;
s4: and (3) putting the solution uniformly stirred in the storage tank into the mine water to be treated by a metering pump.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
1. the sodium tripolyphosphate and the sodium citrate are mixed according to a certain proportion, under the alkalescent condition, the total hardness is between 400 plus materials and 700mg/L, the mine water is added according to two to four thousandths, and after a few minutes, the total hardness of the mine water can be reduced to be below 200mg/L, so that the mine water can easily pass through a filtering device, and due to the low concentration of calcium and magnesium ions, the blockage of the device is small, the backwashing time is prolonged, and the device can also work normally.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to better understand the technical solutions, the technical solutions will be described in detail with reference to specific embodiments.
Example 1:
the embodiment provides a mine water advanced treatment agent, which comprises the following components in parts by weight:
50 portions of sodium tripolyphosphate
50 portions of sodium citrate
The weight ratio of each part of the medicament can be 1.5 multiplied by 107Parts of water.
A use method of a mine water advanced treatment agent comprises the following steps:
s1: mixing sodium tripolyphosphate and sodium citrate;
s2: adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution;
s3: adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution;
s4: and (3) putting the solution uniformly stirred in the storage tank into the mine water to be treated by a metering pump.
When the ratio of the sodium tripolyphosphate to the sodium citrate is 5: and 5, the quality of the treated sewage is unclear.
Example 2:
the embodiment provides a mine water advanced treatment agent, which comprises the following components in parts by weight:
80 portions of sodium tripolyphosphate
20 portions of sodium citrate
The weight ratio of each part of the medicament can be 1.5 multiplied by 107Parts of water.
A use method of a mine water advanced treatment agent comprises the following steps:
s1: mixing sodium tripolyphosphate and sodium citrate;
s2: adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution;
s3: adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution;
s4: and (3) putting the solution uniformly stirred in the storage tank into the mine water to be treated by a metering pump.
When the ratio of the sodium tripolyphosphate to the sodium citrate is 8: and 2, the total salt removal rate is highest.
Example 3:
the embodiment provides a mine water advanced treatment agent, which comprises the following components in parts by weight:
60 parts of sodium tripolyphosphate
40 parts of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water.
A use method of a mine water advanced treatment agent comprises the following steps:
s1: mixing sodium tripolyphosphate and sodium citrate;
s2: adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution;
s3: adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution;
s4: and (3) putting the solution uniformly stirred in the storage tank into the mine water to be treated by a metering pump.
When the ratio of the sodium tripolyphosphate to the sodium citrate is 5: and 5, the quality of the treated sewage is unclear.
Example 4:
the embodiment provides a mine water advanced treatment agent, which comprises the following components in parts by weight:
70 portions of sodium tripolyphosphate
30 portions of sodium citrate
The weight ratio of each part of the medicament can be 1.5 multiplied by 107Parts of water.
A use method of a mine water advanced treatment agent is characterized by comprising the following steps: the method comprises the following steps:
s1: mixing sodium tripolyphosphate and sodium citrate;
s2: adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution;
s3: adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution;
s4: and (3) putting the solution uniformly stirred in the storage tank into the mine water to be treated by a metering pump.
When the ratio of the sodium tripolyphosphate to the sodium citrate is 4: 4, the quality of the treated sewage is unclear and is turbid.
Example 5:
the embodiment provides a mine water advanced treatment agent, which comprises the following components in parts by weight:
75 portions of sodium tripolyphosphate
25 portions of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water.
A use method of a mine water advanced treatment agent is characterized by comprising the following steps: the method comprises the following steps:
s1: mixing sodium tripolyphosphate and sodium citrate;
s2: adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution;
s3: adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution;
s4: and (3) putting the solution uniformly stirred in the storage tank into the mine water to be treated by a metering pump.
When the ratio of the sodium tripolyphosphate to the sodium citrate is 4: 1, the white precipitate is the most concentrated, which indicates that the reaction is more thorough and the total salt removal rate is the highest.
Example 5:
the embodiment provides a mine water advanced treatment agent, which comprises the following components in parts by weight:
55 parts of sodium tripolyphosphate
45 parts of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water.
A use method of a mine water advanced treatment agent comprises the following steps:
s1: mixing sodium tripolyphosphate and sodium citrate;
s2: adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution;
s3: adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution;
s4: and (3) putting the solution uniformly stirred in the storage tank into the mine water to be treated by a metering pump.
When the ratio of the sodium tripolyphosphate to the sodium citrate is 4: and 3, the removal rate of the total salt in the sewage is not obvious.
Poly (sodium tripolyphosphate) (Na)3PO4Sodium phosphate, also known as disodium phosphate, is almost completely decomposed into disodium phosphate and sodium hydroxide in an aqueous solution, so the solution is in a strong alkaline reaction and can react with carbonate, sulfate and chloride of calcium and magnesium to generate phosphate which is insoluble in water, thereby eliminating the hardness caused by the calcium and the magnesium in water, gradually dissolving old scale, generating phosphorization on the surface of equipment wall and generating an iron phosphate protective film. The calcium sulfate can be prevented from being generated because the solubility product of the calcium sulfate is very small, insoluble calcium sulfate precipitate is easy to generate, calcium ions can be completely precipitated by adding a proper amount of trisodium phosphate, and the generated calcium phosphate precipitate is a very soft amorphous substance and does not form scale. The reaction formula is as follows: 3CaSO4＋2Na3PO4→3Na2SO4＋Ca3(PO4)2↓ +3MgSO4＋2Na3PO4→3Na2SO4＋Mg3(PO4)。
Sodium citrate has metal ion complexing ability. Sodium citrate para Ca2+、Mg2+The plasma metal ions have good complexing ability to other metal ions, such as Fe2+The plasma also has good complexing ability.
A conclusion is drawn; the organic combination of the sodium tripolyphosphate and the sodium citrate has obvious and effective effect on the degradation of the total hardness of the mine water, and compared with the traditional double subtraction method, the method has obvious advantages of less feeding and low cost. Secondly, no pollution is caused. Thirdly, the generated precipitate is directly sunk into the coal slime and sent to a thermal power plant for power generation. Fourthly, the hardness degradation speed is high, only a few minutes are needed, and fifthly, the total salt content is not increased after the mine water is added (multiple tests prove). Sixthly, the efficiency of degrading hardness is high, and hard water can be directly medium soft water.
(II) degrading total salt content in mine water by using barium salt mixed solution
The common sulfate, carbonate and magnesium salts in mine water account for about 50-85% of the total salt content, the removal of the salts is very important for removing the total salt content, and according to the provisions of 2014 file in Shandong province, the total salt content of the sewage discharged from the coastal regions of the northern province of the south water and the north water must not exceed 1600 mg/L. Can effectively remove sulfate, carbonate and magnesium salts in the mine water, and can ensure that the mine water is discharged up to the standard.
By utilizing the fact that the solubility of barium salt substances is not high, mine water is discharged from the underground at a certain temperature, the barium salt substances and sulfate, carbonate and magnesium salts in the mine water are subjected to chemical reaction to generate insoluble barium sulfate, barium carbonate, magnesium carbonate and other substances, and the insoluble barium sulfate, barium carbonate, magnesium carbonate and other substances are precipitated in coal slime, so that the total salt content of the whole mine water is reduced.
The method has simple process operation, does not need large-scale equipment for users, and can ensure that the total salt removal rate of the mine water is between 20 and 50 percent, and the main reaction equation is as follows;
2OH- + 2H+ + Ba 2+ + SO4 2- = 2H2O + BaSO4↓
Ba(2+) + SO4(2-) = BaSO4
MgSO4 + Ba 2+= Mg(OH)2↓ + BaSO4↓
Ba2++NaHCO3=BaCO3↓+NaOH+H2O
the product is nontoxic, colorless and tasteless, and suspension is alkalescent,
a method of use; the product and mine water can be fully mixed for 60-120 seconds to generate white precipitation in a mode of adding the storage tank and the metering pump, and the normal usage amount is between three per thousand and six per thousand.
Compared with the reverse osmosis membrane treatment process, the product is simple in use, convenient to operate and easy to control, and the treatment cost is only 50-60% of that of the reverse osmosis membrane method.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A mine water advanced treatment agent is characterized in that: the components are mixed according to the following weight portions:
50-80 parts of sodium tripolyphosphate
20-50 parts of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107～1.5×107Parts of water.
2. The mine water advanced treatment agent of claim 1, wherein: the components are mixed according to the following weight portions:
80 portions of sodium tripolyphosphate
20 portions of sodium citrate
The weight ratio of each part of the medicament can be 1.5 multiplied by 107Parts of water.
3. The mine water advanced treatment agent of claim 1, wherein: the components are mixed according to the following weight portions:
50 portions of sodium tripolyphosphate
50 portions of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water.
4. The mine water advanced treatment agent of claim 1, wherein: the components are mixed according to the following weight portions:
60 parts of sodium tripolyphosphate
40 parts of sodium citrate
The weight ratio of each part of the medicament can be 1.5 multiplied by 107Parts of water.
5. The mine water advanced treatment agent of claim 1, wherein: the components are mixed according to the following weight portions:
70 portions of sodium tripolyphosphate
30 portions of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water.
6. The mine water advanced treatment agent of claim 1, wherein: the components are mixed according to the following weight portions:
75 portions of sodium tripolyphosphate
25 portions of sodium citrate
The weight ratio of each part of the medicine can be 0.5 multiplied by 107Parts of water.
7. A use method of a mine water advanced treatment agent is characterized by comprising the following steps: the method comprises the following steps:
s1: mixing sodium tripolyphosphate and sodium citrate;
s2: adding sodium tripolyphosphate and sodium citrate into water with the weight of 10-15 times of the weight of the sodium tripolyphosphate and the sodium citrate according to the proportion to prepare a solution, and fully stirring the solution to hydrolyze the solution;
s3: adding the sodium tripolyphosphate and the sodium citrate solution in the step S2 into a storage tank, and fully stirring to mix the sodium tripolyphosphate and the sodium citrate solution;
s4: and (3) putting the solution uniformly stirred in the storage tank into the mine water to be treated by a metering pump.
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| GB118668A (en) * | 1917-09-03 | 1918-09-03 | Minerals Separation Ltd | Improvements in or relating to Softening Water. |
| GB425001A (en) * | 1932-08-22 | 1935-02-25 | Hall Lab Inc | Improvements in or relating to water softening |
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