CN211419839U - Industrial circulating water drainage recycling treatment device - Google Patents
Industrial circulating water drainage recycling treatment device Download PDFInfo
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- CN211419839U CN211419839U CN201922177961.0U CN201922177961U CN211419839U CN 211419839 U CN211419839 U CN 211419839U CN 201922177961 U CN201922177961 U CN 201922177961U CN 211419839 U CN211419839 U CN 211419839U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 347
- 229910001868 water Inorganic materials 0.000 title claims abstract description 347
- 238000004064 recycling Methods 0.000 title claims abstract description 22
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 77
- 238000005352 clarification Methods 0.000 claims abstract description 25
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 239000010865 sewage Substances 0.000 claims abstract description 20
- 229910001410 inorganic ion Inorganic materials 0.000 claims abstract description 6
- 239000013049 sediment Substances 0.000 claims abstract description 4
- 238000011001 backwashing Methods 0.000 claims description 27
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 239000010802 sludge Substances 0.000 claims description 7
- 239000008394 flocculating agent Substances 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- 230000000844 anti-bacterial effect Effects 0.000 claims description 3
- 239000003899 bactericide agent Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000002455 scale inhibitor Substances 0.000 claims description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 3
- 239000012535 impurity Substances 0.000 description 9
- 208000028659 discharge Diseases 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000003619 algicide Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000000498 cooling water Substances 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
- 230000000694 effects Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses an industrial circulating water drainage recycling treatment device, which comprises a first treatment unit, a second treatment unit and a third treatment unit which are connected in sequence; the first treatment unit comprises a raw water buffer tank (1), a mechanical accelerated clarification tank (2) and an intermediate water tank (3) which are connected in sequence and used for removing sediments in raw water; the second treatment unit comprises a multi-medium filter (4), an ultrafiltration device (5) and an ultrafiltration water production tank (6) which are connected in sequence and used for removing suspended matters in the raw water; the third treatment unit comprises a cartridge filter (7), a reverse osmosis device (8) and a reuse water tank (9) which are connected in sequence and used for removing inorganic ions in the raw water; the water inlet end of the raw water buffer pool (1) is communicated with the sewage discharged by the circulating water field; the water outlet end of the recycling water tank (9) is communicated with a circulating water field. Compared with the prior art, the utility model discloses an industrial circulating water drainage retrieval and utilization processing apparatus can the water economy resource and reduce the blow off volume.
Description
Technical Field
The utility model relates to a sewage treatment technical field specifically indicates an industrial circulating water drainage retrieval and utilization processing apparatus.
Background
At present, the heat generated in the operation process of equipment in industrial production mainly adopts a circulating water cooling mode, and a large amount of suspended impurities can be generated in the continuous circulating process of cooling water, so that the heat exchange function is seriously influenced.
The method for treating suspended impurities in circulating water mainly comprises the step of adding agents such as a sterilizing algicide and the like at the position of a circulating water inlet so as to reduce the suspended impurities in the circulating water. However, in the whole production process, a large amount of suspended impurities are mixed in the circulating water in the circulating cooling process due to various reasons that the make-up water cannot be completely removed, bacterial microorganisms and corpses fly into the air at the exposed positions, the leakage of pipelines and the falling of corrosion results.
In order to filter the circulating water, a part of the circulating water is led out of a main circulating pipeline in a generally adopted mode, impurities in the system are filtered through the circulating interception of a side filtering device, and finally the impurities are removed out of the system through backwashing, wherein backwashing water is directly discharged into a sewage treatment device and is not generally recycled. When the total content of chloride ions and sulfate ions in the circulating water is more than 1100mg/L, the circulating system directly carries out pollution discharge treatment. Similar solution can be found in the utility model patent "circulating water side filtering system" with patent application number CN201120220355.3 (publication number CN202161850 UU).
However, most of the existing side filters adopt shallow filters, the backwashing period is short, the quantity of backwashing water is large, and the part of backwashing water is used as a sewage direct-discharge sewage treatment device, so that large waste is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art's current situation, provide a can water economy resource and reduce the industrial circulating water drainage retrieval and utilization processing apparatus of blow off volume.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: an industrial circulating water drainage recycling treatment device is characterized by comprising a first treatment unit, a second treatment unit and a third treatment unit which are sequentially connected;
the first treatment unit comprises a raw water buffer tank, a mechanical accelerated clarification tank and an intermediate water tank which are connected in sequence and used for removing sediments in raw water;
the second treatment unit comprises a multi-medium filter, an ultrafiltration device and an ultrafiltration water production tank which are connected in sequence and used for removing suspended matters in the raw water;
the third treatment unit comprises a cartridge filter, a reverse osmosis device and a reuse water tank which are connected in sequence and used for removing inorganic ions in raw water;
the water inlet end of the raw water buffer pool is communicated with the sewage discharged by the circulating water field;
and the water outlet end of the reuse water tank is communicated with a circulating water field.
In order to realize the transportation of raw water in each link, the system also comprises
The water inlet lifting pump is arranged on a pipeline between the water outlet end of the raw water buffer tank and the water inlet end of the mechanical accelerated clarification tank and can convey water from the water outlet end of the raw water buffer tank to the water inlet end of the mechanical accelerated clarification tank;
the filter water inlet pump is arranged on a pipeline between the water outlet end of the middle water tank and the water inlet end of the multi-medium filter and can convey water from the water outlet end of the middle water tank to the water inlet end of the multi-medium filter;
the reverse osmosis water inlet pump is arranged on a pipeline between the water outlet end of the ultrafiltration water production tank and the water inlet end of the cartridge filter and can convey water from the water outlet end of the ultrafiltration water production tank to the water inlet end of the cartridge filter;
the reverse osmosis high-pressure pump is arranged on a pipeline between the water outlet end of the cartridge filter and the water inlet end of the reverse osmosis device and can convey water from the water outlet end of the cartridge filter to the water inlet end of the reverse osmosis device; and
and the produced water output pump is arranged on a pipeline between the water outlet end of the reuse water tank and the circulating water field and can convey water from the water outlet end of the reuse water tank to the circulating water field.
In order to remove most impurities in a precipitation mode, sodium hydroxide and sodium carbonate are added into a pipeline between the water outlet end of the raw water buffer tank and the water inlet end of the mechanical accelerated clarification tank, a flocculating agent is added into the mechanical accelerated clarification tank, and hydrochloric acid is added into a pipeline between the water outlet end of the mechanical accelerated clarification tank and the water inlet end of the intermediate water tank.
Preferably, the flocculant is polyacrylamide.
In order to realize the discharge of the sludge, the mechanical acceleration clarification tank is provided with a sludge outlet which is communicated with a sewage farm.
In order to clean the multi-medium filter and the ultrafiltration device in time, the ultrafiltration water production tank is provided with an ultrafiltration water outlet, the multi-medium filter is provided with a first ultrafiltration water inlet, the ultrafiltration device is provided with a second ultrafiltration water inlet, and the ultrafiltration water outlet is communicated with the first ultrafiltration water inlet and the second ultrafiltration water inlet;
the industrial circulating water drainage recycling treatment device also comprises
And the system backwashing pump is arranged on a pipeline between the ultrafiltration water outlet and the first and second ultrafiltration water inlets and can convey water from the ultrafiltration water outlet to the first and second ultrafiltration water inlets.
In order to conveniently remove impurities in the multi-medium filter and the ultrafiltration device, hydrochloric acid, sodium hypochlorite and sodium hydroxide are added in a pipeline between the ultrafiltration water outlet and the first ultrafiltration water inlet and the second ultrafiltration water inlet.
In order to recover and utilize the backwashing water of the multi-media filter and the ultrafiltration device, the multi-media filter is provided with a first backwashing water outlet, the ultrafiltration device is provided with a second backwashing water outlet, the raw water buffer pool is provided with a backwashing water inlet, and the first backwashing water outlet and the second backwashing water outlet are communicated with the backwashing water inlet.
In order to avoid the influence of impurities in raw water on ultrafiltration, a reducing agent, a scale inhibitor and a non-oxidizing bactericide are added in a pipeline between the water outlet end of the ultrafiltration water production tank and the water inlet end of the cartridge filter.
In order to realize the discharge of the concentrated water, the reverse osmosis device is provided with a concentrated water outlet which is communicated with a sewage farm.
Compared with the prior art, the utility model has the advantages of: through consecutive first processing unit, second processing unit and third processing unit, get rid of precipitate, suspended solid and inorganic ion in the former aquatic in proper order, realize the reuse processing of the drainage that the other filtration system of industrial circulating water produced, practiced thrift a large amount of water resources, reduced the blow off volume, reduce circulating water medicament use amount, practice thrift the running cost, improve the concentration multiple of circulating water.
Drawings
FIG. 1 is a flow chart of an embodiment of the industrial circulating water drainage recycling treatment device of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the industrial circulating water drainage recycling treatment device of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 and fig. 2, it is a preferred embodiment of the industrial circulating water drainage recycling treatment device of the present invention. The industrial circulating water drainage recycling treatment device comprises a first treatment unit A for removing sediments in raw water, a second treatment unit B for removing suspended matters in the raw water and a third treatment unit C for removing inorganic ions in the raw water, which are sequentially connected.
The first treatment unit A comprises a raw water buffer tank 1, a mechanical accelerated clarification tank 2 and an intermediate water tank 3 which are connected in sequence. Specifically, the water inlet end of the raw water buffer pool 1 is communicated with the sewage discharged from the circulating water field, and a water inlet valve is arranged on a pipeline between the water inlet end of the raw water buffer pool 1 and the sewage discharged from the circulating water field; a water inlet lift pump 11 is arranged on a pipeline between the water outlet end of the raw water buffer tank 1 and the water inlet end of the mechanical accelerated clarification tank 2, and can convey water from the water outlet end of the raw water buffer tank 1 to the water inlet end of the mechanical accelerated clarification tank 2; sodium hydroxide and sodium carbonate are added into a pipeline between the water outlet end of the raw water buffer tank 1 and the water inlet end of the mechanical accelerated clarification tank 2, and a flocculating agent is added into the mechanical accelerated clarification tank 2, wherein the flocculating agent is polyacrylamide in the embodiment; the mechanical accelerated clarification tank 2 is provided with a sludge outlet 21, and the sludge outlet 21 is communicated with a sewage farm; hydrochloric acid is added in a pipeline between the water outlet end of the mechanical accelerated clarification tank 2 and the water inlet end of the intermediate water tank 3.
The second treatment unit B comprises a multi-medium filter 4, an ultrafiltration device 5 and an ultrafiltration water production tank 6 which are connected in sequence. Specifically, a filter water inlet pump 31 is arranged on a pipeline between the water outlet end of the middle water tank 3 and the water inlet end of the multi-media filter 4, and can convey water from the water outlet end of the middle water tank 3 to the water inlet end of the multi-media filter 4; the ultrafiltration water production tank 6 is provided with an ultrafiltration water outlet 63, the multi-medium filter 4 is provided with a first ultrafiltration water inlet 41, the ultrafiltration device 5 is provided with a second ultrafiltration water inlet 51, and the ultrafiltration water outlet 63 is communicated with the first ultrafiltration water inlet 41 and the second ultrafiltration water inlet 51; the pipeline between the ultrafiltration water outlet 63 and the first ultrafiltration water inlet 41 and the second ultrafiltration water inlet 51 is provided with a system backwashing pump 62, water can be conveyed to the first ultrafiltration water inlet 41 and the second ultrafiltration water inlet 51 from the ultrafiltration water outlet 63, hydrochloric acid, sodium hypochlorite and sodium hydroxide are added in the pipeline between the ultrafiltration water outlet 63 and the first ultrafiltration water inlet 41 and the second ultrafiltration water inlet 51, the multi-media filter 4 is provided with a first backwashing water outlet 42, the ultrafiltration device 5 is provided with a second backwashing water outlet 52, the raw water buffer tank 1 is provided with a backwashing water inlet 12, and the first backwashing water outlet 42 and the second backwashing water outlet 52 are communicated with the backwashing water inlet 12.
The third treatment unit C comprises a cartridge filter 7, a reverse osmosis device 8 and a reuse water tank 9 which are connected in sequence. Specifically, a reverse osmosis water inlet pump 61 is arranged on a pipeline between the water outlet end of the ultrafiltration water production tank 6 and the water inlet end of the security filter 7, water can be conveyed from the water outlet end of the ultrafiltration water production tank 6 to the water inlet end of the security filter 7, and a reducing agent, a scale inhibitor and a non-oxidizing bactericide are added in the pipeline between the water outlet end of the ultrafiltration water production tank 6 and the water inlet end of the security filter 7; a reverse osmosis high-pressure pump 71 is arranged on a pipeline between the water outlet end of the cartridge filter 7 and the water inlet end of the reverse osmosis device 8, and can convey water from the water outlet end of the cartridge filter 7 to the water inlet end of the reverse osmosis device 8; the reverse osmosis device 8 is provided with a concentrated water outlet 81, and the concentrated water outlet 81 is communicated with a sewage farm; a produced water output pump 91 is arranged on a pipeline between the water outlet end of the reuse water tank 9 and the circulating water field, and can convey water from the water outlet end of the reuse water tank 9 to the circulating water field.
The working principle of the utility model is as follows:
(1) sewage discharged by a circulating water field enters a raw water buffer tank 1 from a sewage pipe network, when the liquid level of the raw water buffer tank is ultrahigh, a water inlet valve is closed, the discharge of the sewage is cut off, raw water in the raw water buffer tank 1 is lifted by a water inlet lifting pump 11 and then enters a mechanical accelerated clarification tank 2, sodium hydroxide and sodium carbonate are added in a pipeline between the water outlet end of the raw water buffer tank 1 and the water inlet end of the mechanical accelerated clarification tank 2, polyacrylamide is added in the mechanical accelerated clarification tank 2, under the action of the medicament, the hardness and alkalinity of the water are converted into calcium carbonate, magnesium hydroxide and water suspended matters, and precipitates are formed under the coagulation and flocculation effects, the precipitates are discharged into a sewage field through a sludge outlet 21 in a muddy water state, and the water after the precipitates are removed flows into an intermediate water tank 3;
(2) water in the middle water tank 3 is lifted by the filter water inlet pump 31 to enter the multi-media filter 4 and the ultrafiltration device 5 in sequence, suspended matters remaining in water quality are removed, then the water enters the ultrafiltration water production tank 6, part of the water in the ultrafiltration water production tank 6 backflushes the multi-media filter 4 and the ultrafiltration device 5 through the ultrafiltration water outlet 63, and backflushing water flows back to the raw water buffer tank 1 through the first backflushing water outlet 42 and the second backflushing water outlet 52 respectively;
(3) the water in the ultrafiltration water production tank 6 enters the cartridge filter 7 through the reverse osmosis water inlet pump 61, then enters the reverse osmosis device 8 after being pressurized by the reverse osmosis high-pressure pump 71, the concentrated water generated by the reverse osmosis device 8 is discharged into a sewage field through a concentrated water outlet 81 for advanced treatment, the water from which inorganic ions are removed by the reverse osmosis device 8 flows into the reuse water tank 9, and finally is sent back to the circulating water field through the produced water output pump 91.
Claims (10)
1. An industrial circulating water drainage recycling treatment device is characterized by comprising a first treatment unit, a second treatment unit and a third treatment unit which are sequentially connected;
the first treatment unit comprises a raw water buffer tank (1), a mechanical accelerated clarification tank (2) and an intermediate water tank (3) which are connected in sequence and used for removing sediments in raw water;
the second treatment unit comprises a multi-medium filter (4), an ultrafiltration device (5) and an ultrafiltration water production tank (6) which are connected in sequence and used for removing suspended matters in raw water;
the third treatment unit comprises a cartridge filter (7), a reverse osmosis device (8) and a reuse water tank (9) which are connected in sequence and used for removing inorganic ions in the raw water;
the water inlet end of the raw water buffer tank (1) is communicated with sewage discharged by a circulating water field;
the water outlet end of the recycling water tank (9) is communicated with a circulating water field.
2. The industrial circulating water drainage recycling treatment device of claim 1, characterized in that: the device also comprises a water inlet lift pump (11) which is arranged on a pipeline between the water outlet end of the raw water buffer pool (1) and the water inlet end of the mechanical accelerated clarification pool (2) and can convey water from the water outlet end of the raw water buffer pool (1) to the water inlet end of the mechanical accelerated clarification pool (2);
the filter water inlet pump (31) is arranged on a pipeline between the water outlet end of the middle water tank (3) and the water inlet end of the multi-medium filter (4) and can convey water from the water outlet end of the middle water tank (3) to the water inlet end of the multi-medium filter (4);
the reverse osmosis water inlet pump (61) is arranged on a pipeline between the water outlet end of the ultrafiltration water production tank (6) and the water inlet end of the cartridge filter (7) and can convey water from the water outlet end of the ultrafiltration water production tank (6) to the water inlet end of the cartridge filter (7);
the reverse osmosis high-pressure pump (71) is arranged on a pipeline between the water outlet end of the cartridge filter (7) and the water inlet end of the reverse osmosis device (8) and can convey water from the water outlet end of the cartridge filter (7) to the water inlet end of the reverse osmosis device (8); and
and the produced water output pump (91) is arranged on a pipeline between the water outlet end of the reuse water tank (9) and the circulating water field and can convey water from the water outlet end of the reuse water tank (9) to the circulating water field.
3. The industrial circulating water drainage recycling treatment device of claim 1, characterized in that: the water outlet end of the raw water buffer tank (1) and the pipeline between the water inlet ends of the mechanical accelerated clarification tank (2) are added with sodium hydroxide and sodium carbonate, the mechanical accelerated clarification tank (2) is added with a flocculating agent, and the water outlet end of the mechanical accelerated clarification tank (2) and the pipeline between the water inlet ends of the middle water tank (3) are added with hydrochloric acid.
4. The industrial circulating water drainage recycling treatment device of claim 3, characterized in that: the flocculant is polyacrylamide.
5. The industrial circulating water drainage recycling treatment device of claim 1, characterized in that: the mechanical accelerated clarification tank (2) is provided with a sludge outlet (21), and the sludge outlet (21) is communicated with a sewage field.
6. The industrial circulating water drainage recycling treatment device of claim 1, characterized in that: the ultrafiltration water production tank (6) is provided with an ultrafiltration water outlet (63), the multi-media filter (4) is provided with a first ultrafiltration water inlet (41), the ultrafiltration device (5) is provided with a second ultrafiltration water inlet (51), and the ultrafiltration water outlet (63) is communicated with the first ultrafiltration water inlet (41) and the second ultrafiltration water inlet (51);
the industrial circulating water drainage recycling treatment device also comprises
And a system backwashing pump (62) which is arranged on a pipeline between the ultrafiltration water outlet (63) and the first and second ultrafiltration water inlets (41, 51) and can convey water from the ultrafiltration water outlet (63) to the first and second ultrafiltration water inlets (41, 51).
7. The industrial circulating water drainage recycling treatment device of claim 6, characterized in that: hydrochloric acid, sodium hypochlorite and sodium hydroxide are added into a pipeline between the ultrafiltration water outlet (63) and the first ultrafiltration water inlet (41) and the second ultrafiltration water inlet (51).
8. The industrial circulating water drainage recycling treatment device of claim 6, characterized in that: the multi-media filter (4) is provided with a first backwashing water outlet (42), the ultrafiltration device (5) is provided with a second backwashing water outlet (52), the raw water buffer pool (1) is provided with a backwashing water inlet (12), and the first backwashing water outlet (42) and the second backwashing water outlet (52) are communicated with the backwashing water inlet (12).
9. The industrial circulating water drainage recycling treatment device according to any one of claims 1 to 8, characterized in that: a reducing agent, a scale inhibitor and a non-oxidizing bactericide are added into a pipeline between the water outlet end of the ultrafiltration water production tank (6) and the water inlet end of the cartridge filter (7).
10. The industrial circulating water drainage recycling treatment device according to any one of claims 1 to 8, characterized in that: the reverse osmosis device (8) is provided with a concentrated water outlet (81), and the concentrated water outlet (81) is communicated with a sewage farm.
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| CN201922177961.0U CN211419839U (en) | 2019-12-06 | 2019-12-06 | Industrial circulating water drainage recycling treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114409137A (en) * | 2022-02-09 | 2022-04-29 | 包头市唐纳德精细化工有限公司 | Low-cost circulating water energy-saving emission-reduction treatment equipment and process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114409137A (en) * | 2022-02-09 | 2022-04-29 | 包头市唐纳德精细化工有限公司 | Low-cost circulating water energy-saving emission-reduction treatment equipment and process |
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