CN215886594U - Recycling treatment device for sewage discharged by circulating cooling water - Google Patents
Recycling treatment device for sewage discharged by circulating cooling water Download PDFInfo
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- CN215886594U CN215886594U CN202120140407.XU CN202120140407U CN215886594U CN 215886594 U CN215886594 U CN 215886594U CN 202120140407 U CN202120140407 U CN 202120140407U CN 215886594 U CN215886594 U CN 215886594U
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Abstract
The utility model provides a recycling treatment device for sewage discharged by circulating cooling water, which mainly comprises: a side filter water inlet pipe is arranged at the bottom of the circulating water tank and is connected with a side filter through a side filter water pump; the water outlet of the side filter is respectively connected with a side filter water production pipe and a cooling blow-off pipe; the side-filtering water production pipe is connected with a circulating water tank; the cooling blow-off pipe is connected with a water inlet of the MF or UF membrane device; a concentrated solution outlet of the MF or UF membrane device is connected with the circulating water tank through a concentrated solution return pipe, and a water producing port of the MF or UF membrane device is connected with a water inlet of the RO membrane device; the water producing port of the RO membrane device is connected with the circulating water tank through a water producing pipe, and the strong brine outlet of the RO membrane device is connected with a strong brine discharge pipe. The utility model utilizes the side filter of the circulating cooling water treatment system, can continuously and effectively improve the cooling water quality of the circulating cooling water treatment system, reduces the water supplement amount by more than 10 percent, reduces the sewage discharge amount by more than 30 percent, and reduces the medicament usage amount by more than 20 percent.
Description
Technical Field
The utility model belongs to the technical field of wastewater reuse, and particularly relates to a reuse treatment device for sewage discharged by circulating cooling water in buildings and industries.
Background
The circulating cooling water system takes water as a cooling medium, circularly operates to take away heat in the process, and generally cools water evaporated by a cooling tower. The water lost by evaporation is pure water and the dissolved salts are concentrated in the remaining cooling water. When the dissolved salts in the cooling water reach a certain concentration, part of the cooling water must be discharged to avoid a series of problems such as scaling, corrosion, deposition and microorganism breeding.
70-80% of industrial water in China is circulating water make-up water. Because the salt content in the replenishing water is different, part of concentrated water must be discharged when the circulating water is concentrated to a certain multiple, and the consumption of water resources and the discharge amount of sewage are large. If the part of concentrated water is treated and recycled, not only can the pollution discharge be reduced and the water utilization rate be improved, but also the integral operation condition of the cooling circulating water system can be improved.
The existing recycling treatment system for sewage discharged by circulating cooling water generally adopts a reverse flow reverse osmosis membrane (RO membrane) to remove organic matters and salt in the cooling sewage, and the produced water returns to a circulating water tank for concentrated water discharge. In order to meet the water inlet condition of the RO membrane and ensure the stable operation thereof, one or more combined pretreatment processes of coagulation air flotation or precipitation, sand filtration and microfiltration membrane (MF membrane) or ultrafiltration membrane (UF membrane) are generally adopted to remove stably dispersed fine particles, biological slime and the like in the cooling sewage.
However, the recycling treatment system for the circulating cooling water discharge sewage in actual operation has the following problems: (1) by adopting a coagulation air flotation or precipitation treatment process, a large amount of inorganic coagulant is used to remove stably dispersed micro particles in the sewage and generate a large amount of sludge; (2) by adopting a coagulating sand filtration treatment process, if the adding amount of the inorganic coagulant is excessive, not only is the backwashing frequency of sand filtration increased, but also the inorganic coagulant penetrating through the sand filtration can block the MF or UF membrane, a security filter element and an RO membrane in a fouling way, if the adding amount of the inorganic coagulant is insufficient, ultra-small particles close to the membrane pore size in the sewage can block the MF or UF membrane pore, and the MF or UF membrane has the defects of insufficient water production, frequent cleaning, easy damage and the like; (3) the combined treatment process of coagulation air flotation or sedimentation, sand filtration, MF or UF membrane and RO membrane is adopted, the operation is stable and reliable, but the defects of large occupied area, high cost, complex and labor-consuming operation and maintenance and the like exist, and the requirement of recycling the cooling sewage in the building or the small and medium-sized industry is difficult to meet.
SUMMERY OF THE UTILITY MODEL
The utility model provides a recycling treatment device for sewage discharged by circulating cooling water, which aims to solve the problems of long treatment process flow, large occupied area of treatment facilities, high investment and operation cost, complex and labor-consuming operation and maintenance, waste sludge generation and the like in the conventional recycling treatment of the sewage discharged by circulating cooling water.
In order to solve the problems, the technical scheme of the utility model is as follows:
the utility model relates to a recycling treatment device for sewage discharged by circulating cooling water, which is characterized by mainly comprising: a circulating water tank, a side filter water pump, a side filter, an MF or UF membrane device and an RO membrane device;
a side filter water inlet pipe is arranged at the bottom of the circulating water tank and is connected with the side filter through the side filter water pump; the water outlet of the side filter is respectively connected with a side filter water production pipe and a cooling sewage discharge pipe; the side-filtering water production pipe is connected with the circulating water tank; the cooling sewage discharge pipe is connected with a water inlet of the MF or UF membrane device; a concentrated solution outlet of the MF or UF membrane device is connected with the circulating water tank through a concentrated solution return pipe, and a water producing port of the MF or UF membrane device is connected with a water inlet of the RO membrane device; the water producing port of the RO membrane device is connected with the circulating water tank through a water producing pipe, and the strong brine outlet of the RO membrane device is connected with a strong brine discharge pipe.
Further, the working device for circulating cooling water is as follows: the water outlet of the circulating water tank is connected with the cooling water inlet of the heat exchanger through a circulating water pump through a pipeline; a cooling water outlet of the heat exchanger is connected with a cooling tower through a pipeline; the cooling tower is positioned right above the circulating water pool, and cooling water flows into the circulating water pool again after being cooled in the cooling tower.
The utility model adopts the organic combination of the circulating cooling water treatment system and the sewage reuse treatment system, exerts respective advantages, achieves the purposes of removing pollutants in cooling water, realizing water saving and emission reduction and optimizing the overall cost: in a circulating cooling water treatment system, a small part of circulating cooling water is added with a specific cationic organic filter aid, and then a side filter is used for removing dispersed and stable fine suspended matters and biological slime; in the sewage reuse treatment system, part of the by-pass filtration produced water is used as sewage to remove micro particles, colloid, microorganisms and the like through an MF or UF membrane, organic matters and salt in the produced water of the MF or UF membrane are removed through an RO membrane, the produced water is returned to a circulating water tank, and concentrated water is discharged.
Therefore, the recycling treatment device for the sewage discharged by the circulating cooling water has the following beneficial effects:
the utility model makes full use of the side filtration of the circulating cooling water treatment system, not only can continuously and effectively improve the cooling water quality of the circulating cooling water treatment system, but also can save pretreatment process units such as coagulation air flotation or sedimentation and sand filtration of the circulating cooling water discharge sewage reuse treatment system; the water quality of the whole circulating cooling water system is improved by water production recycling and dosing side filtration, the concentration multiple is increased from 4-5 times to 5-6 times, the water supplement amount is reduced by more than 10%, the discharge capacity is reduced by more than 30%, and the usage amount of the medicament is reduced by more than 20%; for a circulating cooling water discharge sewage recycling treatment system, the by-pass filtration produced water is used as cooling sewage, so that the quality of the water to be recycled is better, the floor area of treatment facilities is reduced by more than 50%, the investment cost is reduced by more than 30%, the operation cost is reduced by more than 20%, the operation and maintenance are simpler and more convenient, and no waste sludge is generated; for the whole system, the final sewage discharge amount is reduced by more than 60%.
Drawings
FIG. 1 is a schematic view of a recycling treatment device for sewage discharged from a circulating cooling water system according to the present invention;
wherein: 1-cooling tower, 2-circulating water pool, 3-circulating pump, 4-heat exchanger, 5-side filter water pump, 6-side filter, 7-MF or UF membrane device, 8-RO membrane device, 9-blowdown valve
L1-side filtration water inlet pipe, L2-side filtration water production pipe, L3-side filtration backwashing sewage discharge pipe, L4-cooling sewage discharge pipe, L5-concentrated solution return pipe, L6-water production pipe and L7-concentrated brine discharge pipe.
Detailed Description
It should be understood by those skilled in the art that the present embodiment is only for illustrating the present invention and is not to be used as a limitation of the present invention, and changes and modifications of the embodiment can be made within the scope of the claims of the present invention.
The following describes the embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1. A recycling treatment device for sewage discharged by circulating cooling water mainly comprises: a circulating water tank 2, a side filter water pump 5, a side filter 6, an MF or UF membrane device 7 and an RO membrane device 8;
a side filter water inlet pipe L1 is arranged at the bottom of the circulating water tank 2, and the side filter water inlet pipe L1 is connected with the side filter 6 through the side filter water pump 5; the water outlet of the side filter 6 is respectively connected with a side filter water production pipe L2 and a cooling sewage discharge pipe L4; the side-filtering water production pipe L2 is connected with the circulating water tank 2; the cooling sewage discharge pipe L4 is connected with the water inlet of the MF or UF membrane device 7; the concentrated solution outlet of the MF or UF membrane device 7 is connected with the circulating water tank 2 through a concentrated solution return pipe L5, and the water producing port of the MF or UF membrane device is connected with the water inlet of the RO membrane device 8; the water producing port of the RO membrane device 8 is connected with the circulating water tank 2 through a water producing pipe L6, and the strong brine outlet of the RO membrane device is connected with a strong brine discharge pipe L7.
Further, the working device for circulating cooling water is as follows: the water outlet of the circulating water tank 2 is connected with the cooling water inlet of the heat exchanger 4 through a circulating water pump 3 through a pipeline; a cooling water outlet of the heat exchanger 4 is connected with the cooling tower 1 through a pipeline; the cooling tower 1 is positioned right above the circulating water pool 2, cooling water flows into the circulating water pool 2 again after being cooled in the cooling tower 1, and water lost due to evaporation concentration and wind blowing is supplemented.
Further, the heat exchanger 4 is a working device for circulating cooling water, and a plurality of heat exchangers can be connected in parallel or in series.
Furthermore, a sewage outlet is arranged on the side filter 6 and is connected with a backwashing sewage pipe L3.
Furthermore, a blow-down valve 9 is arranged on the cooling blow-down pipe L4, and the blow-down valve 9 is an automatic blow-down valve and is connected with an external automatic control system.
Furthermore, the side filter 6 is a filter device using anthracite or sand as a filter material, and preferably a garnet filter material with the particle size of 0.35-0.45 mm.
Further, the MF or UF membrane apparatus 7 is not particularly limited in the type of membrane, operation method, and membrane material, and is preferably an immersion MF membrane; the type, operation mode and material of the RO membrane device 8 are not particularly limited, and a cross-flow filtration operation mode is preferred.
The working flow of the circulating cooling water is as follows: the cooling water in the circulating water pool 2 is supplied to the heat exchanger 4 through the circulating water pump 3, the cooling water from the heat exchanger 4 is evaporated, concentrated and cooled through the cooling tower 1, and then flows into the circulating water pool 2 again, and meanwhile, the water amount lost due to evaporation concentration and wind blowing is replenished.
The recycling treatment process of the sewage discharged by the circulating cooling water comprises the following steps:
(1) part of the cooling water in the circulating water tank 2 enters a side-filtering water inlet pipe L1, and after the cation organic filter aid is added into the cooling water, the cooling water is supplied to the side filter 6 through the side-filtering water pump 5; filtering by the side filter 6 to remove stably dispersed fine suspended particles and biological slime; most of the by-pass filtration produced water is returned to the circulating water tank 2 through the by-pass filtration produced water pipe L2;
when the pressure difference of the side filter 6 exceeds a set value, backwashing is carried out, trapped particles are discharged, and backwashing water is discharged through a backwashing sewage discharge pipe L3;
(2) when the conductivity of the water in the circulating water tank 2 exceeds a set value, the blowoff valve 9 is automatically opened, so that the by-pass filtration produced water with the increased salt concentration is sent into the membrane tank of the MF membrane device 7 through the cooling blowoff pipe L4, and tiny particles, colloid, microorganisms and the like are removed through membrane filtration; in the MF membrane device 7, the concentrated solution that does not permeate through the MF membrane flows back to the circulating water tank 2 through the concentrated solution return pipe L5 by gravity overflow; the water produced by the MF membrane is supplied to the RO membrane unit 8, and is subjected to cross-flow filtration to remove organic matters, salts, etc., the RO water is returned to the circulating water tank 2 through the water production pipe L6, and RO concentrated brine is discharged through the concentrated brine discharge pipe L7.
Claims (7)
1. The utility model provides a retrieval and utilization processing apparatus of recirculated cooling water row sewage which characterized in that mainly includes: a circulating water tank (2), a side filter water pump (5), a side filter (6), an MF or UF membrane device (7) and an RO membrane device (8);
a side filtering water inlet pipe (L1) is arranged at the bottom of the circulating water tank (2), and the side filtering water inlet pipe (L1) is connected with the side filter (6) through the side filtering water pump (5); the water outlet of the side filter (6) is respectively connected with a side filter water production pipe (L2) and a cooling sewage discharge pipe (L4); the side-filtration water production pipe (L2) is connected with the circulating water pool (2); the cooling sewage discharge pipe (L4) is connected with a water inlet of the MF or UF membrane device (7); a concentrated solution outlet of the MF or UF membrane device (7) is connected with the circulating water tank (2) through a concentrated solution return pipe (L5), and a water producing port of the MF or UF membrane device is connected with a water inlet of the RO membrane device (8); the water production port of the RO membrane device (8) is connected with the circulating water tank (2) through a water production pipe (L6), and the strong brine outlet of the RO membrane device is connected with a strong brine discharge pipe (L7).
2. The recycling treatment device for sewage discharged by circulating cooling water according to claim 1, wherein the working device for circulating cooling water is: the water outlet of the circulating water tank (2) is connected with the cooling water inlet of the heat exchanger (4) through a circulating water pump (3) by a pipeline; a cooling water outlet of the heat exchanger (4) is connected with the cooling tower (1) through a pipeline; the cooling tower (1) is positioned right above the circulating water pool (2), and cooling water is cooled in the cooling tower (1) and then flows into the circulating water pool (2) again.
3. The recycling treatment device of the sewage discharged by the circulating cooling water according to the claim 2, characterized in that the heat exchanger (4) is a working device of the circulating cooling water, and a plurality of heat exchangers are connected in parallel or in series.
4. The recycling treatment device for sewage discharged by circulating cooling water according to claim 1, wherein a sewage outlet is arranged on the side filter (6) and is connected with a backwashing sewage pipe (L3).
5. The recycling treatment apparatus for sewage of circulating cooling water in accordance with claim 1, wherein said cooling sewage pipe (L4) is provided with a sewage valve (9), and said sewage valve (9) is an automatic sewage valve.
6. The recycling device of sewage discharged from circulating cooling water according to claim 1, wherein said by-pass filter (6) is a filter device using anthracite or sand as filter material.
7. The device for the recycling treatment of sewage of circulating cooling water according to claim 1, characterized in that said MF or UF membrane means (7) is a submerged MF membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120140407.XU CN215886594U (en) | 2021-01-19 | 2021-01-19 | Recycling treatment device for sewage discharged by circulating cooling water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120140407.XU CN215886594U (en) | 2021-01-19 | 2021-01-19 | Recycling treatment device for sewage discharged by circulating cooling water |
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| CN215886594U true CN215886594U (en) | 2022-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114485004A (en) * | 2022-02-22 | 2022-05-13 | 中冶长天国际工程有限责任公司 | Sintering plant equipment circulating cooling water system |
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2021
- 2021-01-19 CN CN202120140407.XU patent/CN215886594U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114485004A (en) * | 2022-02-22 | 2022-05-13 | 中冶长天国际工程有限责任公司 | Sintering plant equipment circulating cooling water system |
| CN114485004B (en) * | 2022-02-22 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Circulating cooling water system for equipment in sintering plant |
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