CN112408529A - Waste liquid treatment system and method - Google Patents
Waste liquid treatment system and method Download PDFInfo
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- CN112408529A CN112408529A CN202011474004.5A CN202011474004A CN112408529A CN 112408529 A CN112408529 A CN 112408529A CN 202011474004 A CN202011474004 A CN 202011474004A CN 112408529 A CN112408529 A CN 112408529A
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- 239000007788 liquid Substances 0.000 title claims abstract description 84
- 239000002699 waste material Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000001816 cooling Methods 0.000 claims abstract description 59
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 39
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 239000003507 refrigerant Substances 0.000 claims abstract description 10
- 230000001502 supplementing effect Effects 0.000 claims description 14
- 238000001704 evaporation Methods 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 3
- 239000010808 liquid waste Substances 0.000 claims 2
- 238000004821 distillation Methods 0.000 description 13
- 230000007613 environmental effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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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
- C02F1/048—Purification of waste water by evaporation
-
- 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
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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)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
A waste liquid treatment system and a method thereof, wherein the waste liquid treatment system comprises a low-temperature distillation barrel, a cooling barrel, a vacuumizing device and a heat pump system; the heat pump system comprises a compressor, an inner condenser, an outer condenser, an expansion valve, an inner evaporator, an outer evaporator and a gas-liquid heat regenerator; the inner condenser is arranged in the low-temperature distillation barrel, the outer condenser radiates heat through a condenser fan, the inner evaporator is arranged in the cooling barrel, and the outer evaporator is arranged in the water tank; the vacuumizing device comprises the water tank, a circulating water pump and a vacuum ejector, and the cooling barrel is connected with the air suction end of the vacuum ejector through an exhaust pipe. In the circulating water process formed by a circulating water pump of the vacuumizing device and a water tank, circulating water flows jet in the vacuum ejector to form negative pressure, and then air, steam and water in the cooling barrel are extracted through the exhaust pipe and conveyed to the water tank; when the heat absorption capacity of the inner evaporator is insufficient, the outer evaporator absorbs the heat of water in the water tank to balance the heat of the refrigerant of the heat pump system.
Description
Technical Field
The invention relates to a waste liquid treatment technology, in particular to a waste liquid treatment system and a waste liquid treatment method utilizing a heat pump low-temperature distillation technology.
Background
Industrial waste water is an environmental waste and cannot be discharged at will, so that it must be properly treated by environmental protection units to avoid environmental pollution. However, since the industrial wastewater has a relatively high percentage (about 80-90%) of water, if the industrial wastewater is directly barreled and then treated by an environmental protection unit, not only the space and weight occupied by a large amount of barreled wastewater are very large, but also a large amount of manpower is consumed for shipping and treating. Therefore, the cost required for wastewater treatment is not negligible for the enterprises. How to take out the high-proportion water in the waste water and only reserve a small amount of residual pollution waste to be treated in the waste liquid, so that the method has environmental protection responsibility and greatly reduces the economic benefit of the cost required by waste water treatment.
At present, a waste liquid treatment system and a waste liquid treatment method thereof are generally used for treating waste liquid by a distillation technology, for example, chinese patent publication No. CN110723766A, the waste liquid treatment system includes a distillation barrel for containing waste liquid, a heat pump, a vacuum pump, a condenser, a circulation barrel and a water pump. The heat pump provides heat to the waste liquid, makes the waste liquid produce vapour. The vacuum pump sucks the air in the distillation barrel to make the distillation barrel in a negative pressure vacuum state. The condenser receives the vapor through a vacuum pump, and the vapor is condensed into liquid water. After the liquid water flows through the vacuum pump, the circulating barrel receives the liquid water as recovered water. The water pump pumps the recovered water in the circulating barrel to the heat pump, the recovered water absorbs heat through the heat pump, and flows into the circulating barrel after flowing through the condenser to provide cooling. The waste liquid treatment system has the advantages of complex structure, more required devices and high manufacturing cost.
Disclosure of Invention
The invention aims to provide a waste liquid treatment system and a waste liquid treatment method, which are simple in structure and lower in manufacturing cost.
In order to solve the technical problems, the technical scheme of the invention is as follows: a waste liquid treatment system comprises a low-temperature distillation barrel, a cooling barrel, a vacuumizing device and a heat pump system; the heat pump system comprises a compressor, an inner condenser, an outer condenser, an expansion valve, an inner evaporator, an outer evaporator and a gas-liquid heat regenerator, wherein the output end of the compressor is connected with the inner condenser, the inner condenser is arranged in a low-temperature distillation barrel, the outer condenser is arranged outside the low-temperature distillation barrel and is connected with the inner condenser in series, the outer condenser radiates heat through a condenser fan, the output end of the outer condenser is connected with the expansion valve through a first heat exchange pipeline of the gas-liquid heat regenerator, the inner evaporator is arranged in the cooling barrel, the expansion valve is connected with the inner evaporator, the low-temperature distillation barrel is communicated with the cooling barrel through a steam pipe, the outer evaporator is connected with the inner evaporator in series, the outer evaporator is arranged in a water tank, and the output end of the outer evaporator is connected with the input end of the compressor through a second heat exchange pipeline of the gas-liquid heat regenerator; the vacuumizing device comprises the water tank, a circulating water pump and a vacuum ejector, wherein the input end of the circulating water pump is communicated with the water tank through a water inlet pipe, the output end of the circulating water pump is connected with a nozzle of the vacuum ejector through a water outlet pipe, the cooling barrel is connected with the air suction end of the vacuum ejector through an exhaust pipe, and the mixing output end of the vacuum ejector is connected with the water tank through a water return pipe; and a liquid supplementing joint and a liquid discharging joint are arranged on the low-temperature distillation barrel. The heat pump system comprises two condensers, wherein the internal condenser is used for heating waste liquid, and the temperature of the internal condenser is controlled under the synergistic action of the external condenser, so that the temperature of the internal condenser can be controlled and works at a preset temperature, and the temperature control mode is simple and direct without changing the state of a compressor; the heat pump system comprises two evaporators, wherein an inner evaporator is used for cooling steam into water, an outer condenser is used for increasing the heat absorption capacity of a refrigerant, and when the heat absorption capacity of the inner evaporator is insufficient, the outer evaporator absorbs the heat of the water in a water tank to balance the heat of the refrigerant of the heat pump system, so that the inner evaporator and a compressor are prevented from frosting, and the normal operation of the heat pump system is ensured; the vacuumizing device adopts a jet principle, a vacuum pump is not needed, the low-temperature distillation barrel can be vacuumized only by a circulating water pump and a vacuum jet pump, meanwhile, steam and cooling water in the cooling barrel can be pumped into the water tank, and the water in the water tank can exchange heat with the external evaporator to provide heat required by the external evaporator; the invention has simple structure, less power consumption equipment, low overall energy consumption and high efficiency.
As an improvement, the cryogenic distillation barrel and the cooling barrel are integrated together to form a cryogenic distillation cooling barrel, a partition plate is arranged in the cryogenic distillation cooling barrel and divides the space in the cryogenic distillation cooling barrel into an upper cooling chamber and a lower evaporation chamber, the inner evaporator is arranged in the cooling chamber, and the inner condenser is arranged in the evaporation chamber; the steam pipe is arranged in the cooling chamber, the lower end of the steam pipe is fixed on the partition plate and communicated with the evaporation chamber, and the upper end of the steam pipe is communicated with the cooling chamber.
As an improvement, a liquid supplementing electric valve is arranged on the liquid supplementing joint, a liquid level switch is arranged in the low-temperature distillation barrel, and the liquid level switch is associated with the liquid supplementing electric valve.
As an improvement, a viewing window is arranged on the low-temperature distillation barrel.
As an improvement, the inner condenser is a titanium metal spiral coil, and the outer evaporator is a titanium metal spiral coil.
As an improvement, the water tank is provided with an overflow port.
The waste liquid treatment method comprises the following steps:
(1) the vacuumizing device is used for vacuumizing air in the low-temperature distillation barrel to form a negative pressure state;
(2) the heat pump system works, the waste liquid in the low-temperature distillation barrel is heated by the heat generated by the inner condenser, and the inner condenser is cooled by the waste liquid;
(3) heating the waste liquid to 30-38 ℃ in a negative pressure environment, boiling and evaporating; controlling the temperature of the inner condenser through the working state of the outer condenser;
(4) steam enters the cooling barrel through the steam pipe, and a part of the steam is cooled by the inner evaporator to form water drops and is gathered in the cooling barrel;
(5) in the circulating water process formed by a circulating water pump of the vacuumizing device and a water tank, circulating water flows jet in the vacuum ejector to form negative pressure, and then air, steam and water in the cooling barrel are extracted through the exhaust pipe and conveyed to the water tank;
(6) when the heat absorption capacity of the inner evaporator is insufficient, the outer evaporator absorbs the heat of water in the water tank to balance the heat of the refrigerant of the heat pump system.
Compared with the prior art, the invention has the following beneficial effects:
1. the heat pump system comprises two condensers, wherein the internal condenser is used for heating waste liquid, and the temperature of the internal condenser is controlled under the synergistic action of the external condenser, so that the temperature of the internal condenser can be controlled and works at a preset temperature, and the temperature control mode is simple and direct without changing the state of a compressor;
2. the heat pump system comprises two evaporators, wherein an inner evaporator is used for cooling steam into water, an outer condenser is used for increasing the heat absorption capacity of a refrigerant, and when the heat absorption capacity of the inner evaporator is insufficient, the outer evaporator absorbs the heat of the water in a water tank to balance the heat of the refrigerant of the heat pump system, so that the inner evaporator and a compressor are prevented from frosting, and the normal operation of the heat pump system is ensured;
3. the vacuumizing device adopts a jet principle, a vacuum pump is not needed, the low-temperature distillation barrel can be vacuumized only by a circulating water pump and a vacuum jet pump, meanwhile, steam and cooling water in the cooling barrel can be pumped into the water tank, and the water in the water tank can exchange heat with the external evaporator to provide heat required by the external evaporator;
4. the invention has simple structure, less power consumption equipment, low overall energy consumption and high efficiency.
Drawings
FIG. 1 is a piping diagram of the system of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a waste liquid treatment system comprises a low-temperature distillation barrel 3, a cooling barrel 5, a vacuum pumping device and a heat pump system; the cryogenic distillation barrel 3, the cooling barrel 5, the vacuum and the heat pump system may be integrated in a rack.
As shown in fig. 1, the heat pump system includes a compressor 1, an inner condenser 2, an outer condenser 16, an expansion valve 14, an inner evaporator 8, an outer evaporator 15, and a gas-liquid regenerator 18. The output end of the compressor 1 is connected with the inner condenser 2, the inner condenser 2 is arranged in the low-temperature distillation barrel 3, the outer condenser 16 is arranged outside the low-temperature distillation barrel 3 and is connected with the inner condenser 2 in series, the outer condenser 16 radiates heat through a condenser fan, and the output end of the outer condenser 16 is connected with the expansion valve 14 through a first heat exchange pipeline of the gas-liquid heat regenerator 18; the inner evaporator 8 is arranged in the cooling barrel, the expansion valve is connected with the inner evaporator 8, and the low-temperature distillation barrel 3 is communicated with the cooling barrel 5 through a steam pipe; the outer evaporator 15 is connected with the inner evaporator 8 in series, the outer evaporator 15 is arranged in the water tank, the output end of the outer evaporator 15 is connected with the input end of the compressor 1 through a second heat exchange pipeline of the gas-liquid heat regenerator 18, the temperature of the first heat exchange pipeline is high, and gas in the second heat exchange pipeline can be heated again.
As shown in fig. 1, the vacuum pumping device includes the water tank 13, a circulating water pump 12 and a vacuum ejector 10, an input end of the circulating water pump 12 is communicated with a bottom of the water tank 13 through a water inlet pipe, an output end of the circulating water pump 12 is connected with a nozzle of the vacuum ejector 10 through a water outlet pipe, the cooling tub 5 is connected with a suction end of the vacuum ejector 10 through an air suction pipe 9, and a mixing output end of the vacuum ejector 10 is connected with the water tank 13 through a water return pipe 19.
As shown in fig. 1, a liquid supplementing joint and a liquid discharging joint are arranged on the low-temperature distillation barrel 3, a liquid supplementing electric valve 7 is arranged on the liquid supplementing joint, and a liquid discharging electric valve 17 is arranged on the liquid discharging joint, so that automatic liquid supplementing and discharging can be realized through automatic control. The liquid level switch 20 is arranged in the low-temperature distillation barrel 3, the liquid level switch 20 is associated with the liquid supplementing electric valve 7, and when the liquid level switch 20 detects that the liquid level in the low-temperature distillation barrel is insufficient, the liquid supplementing electric valve 7 is controlled to be opened through the controller to supplement liquid. The low-temperature distillation barrel 3 is provided with a viewing window, so that the condition of waste liquid in the low-temperature distillation barrel 3 can be observed. The inner condenser 2 and the outer evaporator 15 are both titanium metal spiral coils, and the waste liquid has strong corrosivity, so that corrosion-resistant titanium metal is adopted. The water tank 13 is provided with an overflow 11, and the steam and water pumped from the cooling tub 5 increases the amount of water in the water tank 13, and the water in the water tank 13 is discharged through the overflow 11 when a critical amount of water is reached.
As shown in fig. 1, in addition, in order to further simplify the system structure and reduce the volume of the equipment, the cryogenic distillation barrel 3 and the cooling barrel 5 are integrated together to form a cryogenic distillation cooling barrel 5, a partition plate 4 is arranged in the cryogenic distillation cooling barrel 5, the partition plate 4 divides the space in the cryogenic distillation cooling barrel 5 into an upper cooling chamber and a lower evaporation chamber, the internal evaporator 8 is arranged in the cooling chamber, and the internal condenser 2 is arranged in the evaporation chamber; the steam pipe 6 is arranged in the cooling chamber, the lower end of the steam pipe 6 is fixed on the partition plate 4 and is communicated with the evaporation chamber, the upper end of the steam pipe is communicated with the cooling chamber, and steam generated by the evaporation chamber is upwards diffused and directly enters the cooling chamber through the steam pipe 6.
The waste liquid treatment method of the waste liquid treatment system comprises the following steps:
(1) the vacuumizing device is used for vacuumizing air in the low-temperature distillation barrel 3 to form a negative pressure state;
(2) the heat pump system works, the waste liquid in the low-temperature distillation barrel 3 is heated by the heat generated by the inner condenser 2, and the inner condenser 2 is cooled by the waste liquid;
(3) heating the waste liquid to 30-38 ℃ in a negative pressure environment, boiling and evaporating; the temperature of the inner condenser 2 is controlled by the operating state of the outer condenser 16;
(4) steam enters the cooling barrel 5 through a steam pipe, and a part of the steam is cooled by the inner evaporator 8 to form water drops and is gathered in the cooling barrel 5;
(5) in the circulating water process formed by a circulating water pump 12 and a water tank 13 of the vacuumizing device, circulating water flows jet in a vacuum ejector 10 to form negative pressure, and then air, steam and water in the cooling barrel 5 are extracted through an exhaust pipe 9 and conveyed to the water tank 13;
(6) when the heat absorption capacity of the inner evaporator 8 is insufficient, the outer evaporator 15 absorbs the heat of the water in the water tank 13 to balance the heat of the refrigerant of the heat pump system.
The heat pump system comprises two condensers, wherein the internal condenser 2 is used for heating waste liquid, and the temperature of the internal condenser 2 is controlled under the synergistic action of the external condenser 16, so that the temperature of the internal condenser 2 can be controlled and works at a preset temperature, and the temperature control mode is simple and direct without changing the state of the compressor 1; the heat pump system comprises two evaporators, wherein an inner evaporator 8 is used for cooling steam into water, an outer condenser 16 is used for increasing the heat absorption capacity of a refrigerant, and when the heat absorption capacity of the inner evaporator 8 is insufficient, an outer evaporator 15 absorbs the heat of the water in a water tank 13 to balance the heat of the refrigerant of the heat pump system, so that the inner evaporator 8 and a compressor 1 are prevented from frosting, and the normal operation of the heat pump system is ensured; the vacuumizing device adopts a jet principle, a vacuum pump is not needed, the low-temperature distillation barrel 3 can be vacuumized only by the circulating water pump 12 and the vacuum jet pump, meanwhile, steam and cooling water in the cooling barrel 5 can be pumped into the water tank 13, and the water in the water tank 13 can exchange heat with the external evaporator 15 to provide heat required by the external evaporator 15; the invention has simple structure, less power consumption equipment, low overall energy consumption and high efficiency.
Claims (7)
1. A waste liquid treatment system comprises a low-temperature distillation barrel, a cooling barrel, a vacuumizing device and a heat pump system; the method is characterized in that: the heat pump system comprises a compressor, an inner condenser, an outer condenser, an expansion valve, an inner evaporator, an outer evaporator and a gas-liquid heat regenerator, wherein the output end of the compressor is connected with the inner condenser, the inner condenser is arranged in a low-temperature distillation barrel, the outer condenser is arranged outside the low-temperature distillation barrel and is connected with the inner condenser in series, the outer condenser radiates heat through a condenser fan, the output end of the outer condenser is connected with the expansion valve through a first heat exchange pipeline of the gas-liquid heat regenerator, the inner evaporator is arranged in the cooling barrel, the expansion valve is connected with the inner evaporator, the low-temperature distillation barrel is communicated with the cooling barrel through a steam pipe, the outer evaporator is connected with the inner evaporator in series, the outer evaporator is arranged in a water tank, and the output end of the outer evaporator is connected with the input end of the compressor through a second heat exchange pipeline of the gas-liquid heat regenerator; the vacuumizing device comprises the water tank, a circulating water pump and a vacuum ejector, wherein the input end of the circulating water pump is communicated with the water tank through a water inlet pipe, the output end of the circulating water pump is connected with a nozzle of the vacuum ejector through a water outlet pipe, the cooling barrel is connected with the air suction end of the vacuum ejector through an exhaust pipe, and the mixing output end of the vacuum ejector is connected with the water tank through a water return pipe; and a liquid supplementing joint and a liquid discharging joint are arranged on the low-temperature distillation barrel.
2. The waste liquid treatment system according to claim 1, characterized in that: the low-temperature distillation barrel and the cooling barrel are integrated together to form a low-temperature distillation cooling barrel, a partition plate is arranged in the low-temperature distillation cooling barrel, the partition plate divides the space in the low-temperature distillation cooling barrel into an upper cooling chamber and a lower evaporation chamber, the inner evaporator is arranged in the cooling chamber, and the inner condenser is arranged in the evaporation chamber; the steam pipe is arranged in the cooling chamber, the lower end of the steam pipe is fixed on the partition plate and communicated with the evaporation chamber, and the upper end of the steam pipe is communicated with the cooling chamber.
3. The waste liquid treatment system according to claim 1, characterized in that: the liquid supplementing joint is provided with a liquid supplementing electric valve, the low-temperature distillation barrel is internally provided with a liquid level switch, and the liquid level switch is associated with the liquid supplementing electric valve.
4. The waste liquid treatment system according to claim 1, characterized in that: and the low-temperature distillation barrel is provided with a viewing window.
5. The waste liquid treatment system according to claim 1, characterized in that: the inner condenser is a titanium metal spiral coil pipe, and the outer evaporator is a titanium metal spiral coil pipe.
6. The waste liquid treatment system according to claim 1, characterized in that: and an overflow port is arranged on the water tank.
7. A liquid waste treatment method of the liquid waste treatment system according to claim 1, comprising the steps of:
(1) the vacuumizing device is used for vacuumizing air in the low-temperature distillation barrel to form a negative pressure state;
(2) the heat pump system works, the waste liquid in the low-temperature distillation barrel is heated by the heat generated by the inner condenser, and the inner condenser is cooled by the waste liquid;
(3) heating the waste liquid to 30-38 ℃ in a negative pressure environment, boiling and evaporating; controlling the temperature of the inner condenser through the working state of the outer condenser;
(4) steam enters the cooling barrel through the steam pipe, and a part of the steam is cooled by the inner evaporator to form water drops and is gathered in the cooling barrel;
(5) in the circulating water process formed by a circulating water pump of the vacuumizing device and a water tank, circulating water flows jet in the vacuum ejector to form negative pressure, and then air, steam and water in the cooling barrel are extracted through the exhaust pipe and conveyed to the water tank;
(6) when the heat absorption capacity of the inner evaporator is insufficient, the outer evaporator absorbs the heat of water in the water tank to balance the heat of the refrigerant of the heat pump system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011474004.5A CN112408529A (en) | 2020-12-15 | 2020-12-15 | Waste liquid treatment system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011474004.5A CN112408529A (en) | 2020-12-15 | 2020-12-15 | Waste liquid treatment system and method |
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| CN112408529A true CN112408529A (en) | 2021-02-26 |
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| CN202011474004.5A Pending CN112408529A (en) | 2020-12-15 | 2020-12-15 | Waste liquid treatment system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816558A (en) * | 2021-10-27 | 2021-12-21 | 迈玺(深圳)智能动力有限公司 | Method and device for refining copper heavy metal in acid pickling copper wastewater |
| CN114956227A (en) * | 2022-05-20 | 2022-08-30 | 深圳市家家分类科技有限公司 | System and method for waste liquid treatment |
| CN116282308A (en) * | 2023-04-25 | 2023-06-23 | 中国铁建重工集团股份有限公司 | Sewage recycling system |
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| CN113816558A (en) * | 2021-10-27 | 2021-12-21 | 迈玺(深圳)智能动力有限公司 | Method and device for refining copper heavy metal in acid pickling copper wastewater |
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| CN116282308A (en) * | 2023-04-25 | 2023-06-23 | 中国铁建重工集团股份有限公司 | Sewage recycling system |
| CN116282308B (en) * | 2023-04-25 | 2024-05-28 | 中国铁建重工集团股份有限公司 | Sewage recycling system |
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Application publication date: 20210226 |
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