CN113277580A - High calcium magnesium waste water evaporation system - Google Patents
High calcium magnesium waste water evaporation system Download PDFInfo
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- CN113277580A CN113277580A CN202010105573.6A CN202010105573A CN113277580A CN 113277580 A CN113277580 A CN 113277580A CN 202010105573 A CN202010105573 A CN 202010105573A CN 113277580 A CN113277580 A CN 113277580A
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/042—Prevention of deposits
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/046—Treatment of water, waste water, or sewage by heating by distillation or evaporation under vacuum produced by a barometric column
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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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur 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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a high-calcium-magnesium wastewater evaporation system which comprises an evaporation chamber, a material circulating pipe and a recirculation heater, wherein the evaporation chamber is connected with the recirculation heater through the material circulating pipe; the evaporation chamber is internally provided with a liquid distributor which is connected with the recirculation heater, and the bottom of the evaporation chamber is also provided with a material outlet. Compared with the traditional high-calcium magnesium wastewater treatment system, the high-calcium magnesium wastewater evaporation system disclosed by the invention has the advantages that the device for removing hardness by a two-alkali method and the step of adding a medicament are omitted, so that the cost is reduced; and the material circulating flow field is controlled by the anti-scaling rotational flow component, so that the generation of scaling is avoided, and the hard evaporation of the high-calcium magnesium wastewater is avoided.
Description
Technical Field
The invention relates to a high-calcium-magnesium wastewater evaporation system, in particular to a pretreatment-free hardness-removing direct evaporation system for high-calcium-magnesium wastewater.
Background
The evaporation concentration technology is one of the important technologies for reducing the emission of the waste water. The existing high-calcium magnesium wastewater treatment systems all need to remove calcium and magnesium in wastewater by adopting a medicament adding mode (mostly a two-alkali method, namely a calcium hydroxide and sodium carbonate calcium and magnesium removal method) before evaporation, and then evaporation is carried out to avoid the phenomenon of scaling in the evaporation process, but the treatment process has the following defects:
(1) long process flow, large occupied area and large investment: both magnesium removal and calcium removal require corresponding equipment;
(2) the generation of solid wastes is much: the mixture of magnesium hydroxide and calcium carbonate is generated and can not be reused;
(3) the operation cost is high: medicament cost and equipment operation power consumption.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-calcium-magnesium wastewater evaporation system which can realize evaporation treatment of high-calcium-magnesium wastewater under the condition of no hardness removal by a two-alkali method and simultaneously avoid scaling.
The technical purpose of the invention is realized by the following technical scheme.
A high calcium magnesium waste water evaporation system, includes evaporating chamber, material circulating pipe and recirculation heater, wherein:
the evaporation chamber is connected with a material circulating pipe through a pipeline, the material circulating pipe is connected with the recirculation heater through a pipeline, the evaporation chamber is connected with a vacuum system through a pipeline, and a material outlet is arranged at the bottom of the evaporation chamber;
a liquid distributor is arranged in the evaporation chamber, the liquid distributor is connected with the recirculation heater through a pipeline, the whole liquid distributor is of a horn structure, and the opening of the horn is vertically upward so as to realize that the material enters the evaporation chamber from bottom to top;
the material circulating pipe is provided with a material inlet, the pipeline between the material circulating pipe and the recirculation heater is provided with a material circulating pump and an anti-scale rotational flow component, and when power is provided for the material, the laminar flow is changed into turbulent flow after the material passes through the anti-scale rotational flow component;
the recirculation heater comprises a material pipe, a heating circulating pipe and a heat source circulating pump, wherein one side of the material pipe is connected with the material circulating pipe through a pipeline, and the other side of the material pipe is connected with the liquid distributor through a pipeline; two sides of the heating circulating pipe are respectively connected with the material pipe, a heat source inlet and a heat source outlet are arranged on the heating circulating pipe, and the heating circulating pipe is connected with a heat source circulating pump; the heat source circulates in the heating layer and the heating circulating pipe of the material pipe under the action of the heat source circulating pump so as to reach stable and uniform temperature and stably heat the material in the material pipe, so that the material reaches a preset temperature and then enters the evaporation chamber.
And an exhaust port is arranged at the top end of the evaporation chamber and is connected with a vacuum system.
The evaporation chamber is cylindrical.
Moreover, the liquid distributor is provided with a plurality of small holes so as to realize the uniform distribution of the materials.
And after the material passes through the anti-scale rotational flow component, the material generates directional rotation, forms turbulent flow and then enters the recirculation heater for heating.
And the heat source inlet is arranged on the heating circulating pipe and is close to the position where the materials enter the material pipe.
Furthermore, the heat source outlet is arranged on the heating circulating pipe and is close to the position where the materials leave the material pipe.
When the high-calcium-magnesium wastewater evaporation system is used for evaporating high-calcium-magnesium wastewater, because sulfate ions are always present in the high-calcium-magnesium wastewater besides calcium ions and magnesium ions, and the existence of the sulfate ions can easily cause the scaling of calcium sulfate during operation, the materials need to generate directional rotation (namely, laminar flow is changed into turbulent flow) after passing through the anti-scaling cyclone component, and then enter the recirculation heater for heating and temperature rise, so as to avoid the scaling in equipment. Meanwhile, the material pipe is heated through a heat source (such as hot water at 100 ℃), a heat source circulating pump and a heating circulating pipe, so that the temperature of the section of the material pipe reaches uniformity (such as 90-95 ℃), at the moment, turbulent materials enter a material channel on the inner layer in the material pipe and are uniformly heated by an outer layer heat source, and the materials reach a preset temperature (such as 80-85 ℃) when leaving the recirculation heater. In this way, problems (e.g., scaling) caused by non-uniform heating can be avoided. Furthermore, when the material reaches the liquid distributor, the cross-sectional area is gradually increased from bottom to top due to the upward bell mouth of the liquid distributor, so that the evaporation plane of the material is stabilized, the flow rate of the material is favorably reduced, the evaporation efficiency is improved, and scaling is avoided.
Compared with the traditional high-calcium magnesium wastewater treatment system, the high-calcium magnesium wastewater evaporation system disclosed by the invention has the advantages that the device for removing hardness by a two-alkali method and the step of adding a medicament are omitted, so that the cost is reduced; and the material circulating flow field is controlled by the anti-scaling rotational flow component, and a circulating heating mode is adopted, so that the generation of scaling is avoided, and the hard evaporation of the high-calcium magnesium wastewater is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a high calcium and magnesium wastewater evaporation system of the invention.
Description of reference numerals:
1-evaporation chamber 2-material circulating pipe
3-recirculation heater 4-liquid distributor
5-material circulating pump 6-antiscale rotational flow component
7-heating circulating pipe 8-heat source circulating pump
9-vacuum System 10-Material Inlet
11-material outlet 12-heat source inlet
13-Heat Source Outlet 3-1-Material tube
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
As shown in figure 1, the high-calcium-magnesium wastewater evaporation system comprises an evaporation chamber 1, a material circulating pipe 2, a recirculation heater 3 (containing a material pipe 3-1), a liquid distributor 4, a material circulating pump 5, an anti-scale cyclone component 6, a heating circulating pipe 7, a heat source circulating pump 8, a vacuum system 9, a material inlet 10, a material outlet 11, a heat source inlet 12 and a heat source outlet 13.
The evaporation chamber 1 is connected with a recirculation heater 3 through a material circulation pipe 2. The evaporation chamber 1 is of a cylindrical structure, a material outlet 11 is formed in the bottom of the evaporation chamber, an exhaust port is formed in the top end of the evaporation chamber, the exhaust port is connected with a vacuum system 9, a liquid distributor 4 is arranged inside the evaporation chamber 1, the tail end of the evaporation chamber is of a horn-mouth structure (the horn mouth is upward) and is provided with a plurality of small holes, and the liquid distributor 4 is connected with the recirculation heater 3 (namely a material pipe 3-1 of the recirculation heater).
The material circulating pipe is connected with the recirculation heater through a pipeline, a material inlet 10, a material circulating pump 5 and an anti-scale cyclone component 6 are sequentially arranged from far to near relative to the recirculation heater 3, and the anti-scale cyclone component 6 is arranged between the material circulating pump 5 and the recirculation heater 3.
The recirculation heater comprises a material pipe, a heating circulating pipe and a heat source circulating pump, wherein one side of the material pipe is connected with the material circulating pipe through a pipeline, and the other side of the material pipe is connected with the liquid distributor through a pipeline; two sides of the heating circulating pipe are respectively connected with the material pipe, a heat source inlet and a heat source outlet are arranged on the heating circulating pipe, and the heating circulating pipe is connected with a heat source circulating pump; the heat source inlet 12 is arranged between the material pipe 3-1 and the heat source circulating pump 8, namely on the heating circulating pipe and is close to the position where the material enters the material pipe; the heat source outlet 13 is arranged between the material pipe 3-1 and the heating circulation pipe 7, namely on the heating circulation pipe, and is close to the position where the material leaves the material pipe.
The high-calcium magnesium wastewater is evaporated by using the equipment, and the concentration of magnesium ions, calcium ions, sulfate ions and chloride ions in the metallurgical mother liquor high-calcium magnesium wastewater to be treated is 1761.54mg/L, 653.21mg/L, 5921.67mg/L, 1761.33mg/L and 3921.78 mg/L. At the above calcium and magnesium ion concentrations, the wastewater is already saturated with calcium sulfate.
The waste water is conveyed into the material circulating pipe 2 through the material inlet 10, is fully mixed with the materials in the material circulating pipe 2 under the action of hydraulic stirring, and enters an evaporation system in front of the material circulating pump 5; the mixed materials are pushed by a material circulating pump 5, and then directionally rotated by an anti-scaling rotational flow component 6, and then enter a recirculation heater 3 for heating and temperature rise, and the rotating materials can quickly wash the inner wall of a material pipe 3-1 of the recirculation heater, so that scaling in the recirculation heater 3 is avoided.
The heat source circulates in the heating layer and the heating circulating pipe of the material pipe under the action of the heat source circulating pump so as to reach stable and uniform temperature and stably heat the material in the material pipe, so that the material reaches a preset temperature and then enters the evaporation chamber. The heat source enters the recirculation heater 3 through the heat source inlet 12 and is mixed with the hot water in the heating circulating pipe 7 under the action of the heat source circulating pump 8, so that the temperature of the heat source can be controlled, the flow rate of the heat source in the recirculation heater is improved due to the heat source circulating pump 8, the heat transfer efficiency is improved, the temperature difference between the heat source and the material is reduced, and the defect that scaling is easy to occur under the working condition of large temperature difference between the heat source and the material is avoided. The hot water with the temperature of 100 ℃ is used as a heat source and is mixed with the hot water in the heating circulating pipe 7 under the action of the heat source circulating pump 8, so that the stable temperature of the hot water is controlled to be 90 ℃, the existence of the heat source circulating pump 8 improves the flow velocity of the hot water in the double circulation heater, improves the heat transfer efficiency, reduces the temperature difference and avoids scaling.
After the material is heated by the recirculation heater 3, the temperature of the material is controlled to be 85 ℃, the heated material enters the evaporation chamber 1 through the liquid distributor 4, and is uniformly mixed and evaporated with the liquid in the evaporation chamber 1 through the small holes of the liquid distributor 4. The evaporated material is discharged through a material outlet 11 at the bottom of the evaporation chamber, the steam generated by evaporation enters the vacuum system 9 through an exhaust port at the top of the evaporation chamber, and the vacuum system 9 provides a micro negative pressure state during evaporation. After operation, the concentration of the material discharged from the material outlet 11 is improved to 23532.41mg/L of magnesium ions, 315.63mg/L of calcium ions, 50315.41mg/L of sulfate ions, 26245.10mg/L of sodium ions and 73211.76mg/L of chloride ions, and the discharged material also contains solid-phase calcium sulfate, so that after 72 hours of continuous operation, the waste water can be effectively evaporated, and the scaling phenomenon does not occur in the equipment.
The treatment of the high-calcium magnesium wastewater can be realized by adjusting according to the content of the invention, and meanwhile, the continuous fouling treatment can be realized within 72 hours. The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. The utility model provides a high calcium magnesium waste water vaporization system which characterized in that, includes evaporating chamber, material circulating pipe and recirculation heater, wherein:
the evaporation chamber is connected with a material circulating pipe through a pipeline, the material circulating pipe is connected with the recirculation heater through a pipeline, the evaporation chamber is connected with a vacuum system through a pipeline, and a material outlet is arranged at the bottom of the evaporation chamber;
a liquid distributor is arranged in the evaporation chamber, the liquid distributor is connected with the recirculation heater through a pipeline, the whole liquid distributor is of a horn structure, and the opening of the horn is vertically upward so as to realize that the material enters the evaporation chamber from bottom to top;
the material circulating pipe is provided with a material inlet, the pipeline between the material circulating pipe and the recirculation heater is provided with a material circulating pump and an anti-scale rotational flow component, and when power is provided for the material, the laminar flow is changed into turbulent flow after the material passes through the anti-scale rotational flow component;
the recirculation heater comprises a material pipe, a heating circulating pipe and a heat source circulating pump, wherein one side of the material pipe is connected with the material circulating pipe through a pipeline, and the other side of the material pipe is connected with the liquid distributor through a pipeline; two sides of the heating circulating pipe are respectively connected with the material pipe, a heat source inlet and a heat source outlet are arranged on the heating circulating pipe, and the heating circulating pipe is connected with a heat source circulating pump; the heat source circulates in the heating layer and the heating circulating pipe of the material pipe under the action of the heat source circulating pump so as to reach stable and uniform temperature and stably heat the material in the material pipe, so that the material reaches a preset temperature and then enters the evaporation chamber.
2. The high-calcium high-magnesium wastewater evaporation system of claim 1, wherein an exhaust port is arranged at the top end of the evaporation chamber, and the exhaust port is connected with a vacuum system.
3. The high-calcium-magnesium wastewater evaporation system of claim 1, wherein the liquid distributor has a plurality of small holes to achieve uniform distribution of the material.
4. The high-calcium high-magnesium wastewater evaporation system of claim 1, wherein the evaporation chamber is cylindrical in shape.
5. The high-calcium-magnesium wastewater evaporation system according to claim 1, wherein the heat source inlet is arranged on the heating circulation pipe and is close to the position where the material enters the material pipe; the heat source outlet is arranged on the heating circulating pipe and is close to the position where the materials leave the material pipe.
6. The high-calcium-magnesium wastewater evaporation system according to claim 1, wherein the heat source is hot water at 100 ℃ to heat the material pipe, so that the temperature of the material pipe is uniform, such as 90-95 ℃; when the material leaves the recirculation heater, the material reaches a preset temperature, such as 80-85 ℃.
7. A method for evaporating waste water containing high calcium and magnesium by using the system as claimed in claims 1 to 6,
the waste water is conveyed into a material circulating pipe through a material inlet, is fully mixed with materials in the material circulating pipe under the action of hydraulic stirring, and enters an evaporation system in front of a material circulating pump; the mixed materials are pushed by a material circulating pump, generate turbulence through an anti-scale rotational flow component, and then enter a recirculation heater for heating and temperature rise;
the heat source enters the recirculation heater through the heat source inlet, and is mixed with hot water in the heating circulation pipe under the action of the heat source circulation pump, so that the temperature of the heat source can be controlled, the heat source circulates in the heating layer and the heating circulation pipe of the material pipe under the action of the heat source circulation pump to reach stable and uniform temperature and stably heat the material in the material pipe, so that the material reaches the preset temperature, and then enters the evaporation chamber;
after the material is heated by the recirculation heater, the heated material enters the evaporation chamber through the liquid distributor and is uniformly mixed with the liquid in the evaporation chamber for evaporation.
8. The evaporation method of claim 7, wherein the evaporated material is discharged through a material outlet at the bottom of the evaporation chamber, and the vapor generated by evaporation enters the vacuum system through a gas outlet at the top of the evaporation chamber, and the vacuum system provides a slight negative pressure during evaporation.
9. An evaporation method according to claim 7, characterised in that the heat source is hot water at 100 degrees centigrade, and the material tube is heated to make the temperature of this section of the material tube uniform, such as 90-95 degrees centigrade; when the material leaves the recirculation heater, the material reaches a preset temperature, such as 80-85 ℃.
10. An evaporation method according to claim 7, characterized in that the high calcium magnesium wastewater contains calcium ions, magnesium ions, sulfate ions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010105573.6A CN113277580B (en) | 2020-02-20 | 2020-02-20 | High calcium magnesium waste water evaporation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010105573.6A CN113277580B (en) | 2020-02-20 | 2020-02-20 | High calcium magnesium waste water evaporation system |
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| CN113277580A true CN113277580A (en) | 2021-08-20 |
| CN113277580B CN113277580B (en) | 2022-09-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2888386Y (en) * | 2005-12-28 | 2007-04-11 | 林丰 | Side stream type gas-water heat exchanger |
| RU2008152942A (en) * | 2008-12-31 | 2010-07-10 | Закрытое акционерное общество Научно-производственное предприятие "Машпром" (ЗАО НПП "Машпром") (RU) | METHOD FOR HEATING NAKIPE-FORMING SOLUTIONS AND APPARATUS FOR ITS IMPLEMENTATION |
| CN205023891U (en) * | 2015-10-07 | 2016-02-10 | 中国轻工业长沙工程有限公司 | Crystallizing evaporator |
| CN205748091U (en) * | 2016-06-20 | 2016-11-30 | 新疆海克新能源科技有限公司 | Novel single tube circulating sleeve-type heat exchanger |
| CN206973874U (en) * | 2017-05-19 | 2018-02-06 | 天津市龙津科技有限公司 | A kind of liquid electromagnetic heating boiler system |
-
2020
- 2020-02-20 CN CN202010105573.6A patent/CN113277580B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2888386Y (en) * | 2005-12-28 | 2007-04-11 | 林丰 | Side stream type gas-water heat exchanger |
| RU2008152942A (en) * | 2008-12-31 | 2010-07-10 | Закрытое акционерное общество Научно-производственное предприятие "Машпром" (ЗАО НПП "Машпром") (RU) | METHOD FOR HEATING NAKIPE-FORMING SOLUTIONS AND APPARATUS FOR ITS IMPLEMENTATION |
| CN205023891U (en) * | 2015-10-07 | 2016-02-10 | 中国轻工业长沙工程有限公司 | Crystallizing evaporator |
| CN205748091U (en) * | 2016-06-20 | 2016-11-30 | 新疆海克新能源科技有限公司 | Novel single tube circulating sleeve-type heat exchanger |
| CN206973874U (en) * | 2017-05-19 | 2018-02-06 | 天津市龙津科技有限公司 | A kind of liquid electromagnetic heating boiler system |
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| CN113277580B (en) | 2022-09-09 |
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