CN113149309A - Titanium sponge industrial wastewater treatment system and technology - Google Patents
Titanium sponge industrial wastewater treatment system and technology Download PDFInfo
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- CN113149309A CN113149309A CN202110317375.0A CN202110317375A CN113149309A CN 113149309 A CN113149309 A CN 113149309A CN 202110317375 A CN202110317375 A CN 202110317375A CN 113149309 A CN113149309 A CN 113149309A
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 44
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 22
- 238000005516 engineering process Methods 0.000 title description 2
- 239000002351 wastewater Substances 0.000 claims abstract description 118
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 36
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 29
- 238000004064 recycling Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 239000010802 sludge Substances 0.000 claims abstract description 14
- 238000001471 micro-filtration Methods 0.000 claims abstract description 13
- 238000001728 nano-filtration Methods 0.000 claims abstract description 12
- 238000005345 coagulation Methods 0.000 claims abstract description 8
- 230000015271 coagulation Effects 0.000 claims abstract description 8
- 239000012267 brine Substances 0.000 claims abstract description 6
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000011033 desalting Methods 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000003153 chemical reaction reagent Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000011001 backwashing Methods 0.000 claims description 5
- 238000010979 pH adjustment Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 4
- 241000894006 Bacteria Species 0.000 claims description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 3
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 229910001424 calcium ion Inorganic materials 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 3
- 244000005700 microbiome Species 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000002455 scale inhibitor Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 230000001112 coagulating effect Effects 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims description 2
- 238000010612 desalination reaction Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a titanium sponge industrial wastewater treatment system and a process, which solve the problems of high cost and high discharge caused by mixed treatment of high-concentration wastewater and low-concentration wastewater in the titanium sponge industry in the prior art. The invention carries out grading treatment on high-salinity water and low-salinity water in the titanium sponge industrial wastewater; wherein the high-concentration wastewater treatment comprises a pH adjusting tank, a softening reaction tank, a coagulation tank, tubular membrane microfiltration, a sludge concentration tank, a Nanofiltration (NF) device, reverse osmosis, concentration (a disc-tube reverse osmosis membrane device) and desalination (a mechanical steam recompression device), and the low-concentration wastewater treatment comprises a multi-media filter, ultrafiltration and reverse osmosis. The clean water produced by the reverse osmosis of the low-concentration wastewater is directly recycled, and the strong brine is conveyed to the high-concentration wastewater regulating tank by a pump for treatment. The treatment method effectively solves the problems of high cost and high discharge caused by the mixed treatment of high-salt water and low-salt water in the titanium sponge industry, realizes the recycling and zero discharge of all water, and is suitable for the treatment of the titanium sponge industrial wastewater.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a grading treatment process for high-concentration wastewater and low-concentration wastewater in the titanium sponge industry.
Background
The existing wastewater treatment mode in the titanium sponge industry is to treat wastewater generated in the whole factory after all the wastewater is mixed, and the concentration of the mixed wastewater is usually lower than the treatment standard of high-concentration wastewater and higher than the treatment standard of low-concentration wastewater; if a low-concentration wastewater treatment process is adopted, the discharge standard is difficult to reach due to insufficient treatment capacity; if a high concentration wastewater treatment process is used for the treatment, the treatment cost is high due to an increase in the treatment amount. This creates pressure on the industrial water treatment of titanium sponge.
Disclosure of Invention
Aiming at the problems of high cost and high discharge caused by the mixed treatment of high-concentration wastewater and low-concentration wastewater in the titanium sponge industry in the prior art, the invention provides a titanium sponge industrial wastewater treatment system and a titanium sponge industrial wastewater treatment process, and aims to: the treatment quality of the titanium sponge industrial wastewater is improved, and the treatment cost is reduced.
The technical scheme adopted by the invention is as follows:
a titanium sponge industrial wastewater treatment system comprises a low-concentration wastewater treatment system and a high-concentration wastewater treatment system, wherein the low-concentration wastewater treatment system comprises a low-concentration wastewater regulating tank, a multi-media filter, an ultrafiltration device, an ultrafiltration water production tank, a first reverse osmosis device and a reuse water tank which are sequentially connected; the high-concentration wastewater treatment system comprises a high-concentration wastewater adjusting tank, a two-stage pH adjusting tank, a softening reaction tank, a coagulation tank, a tubular membrane microfiltration tank, a pH adjusting/intermediate water tank, a nanofiltration device, a second reverse osmosis device and a high-salt recycling tank which are sequentially connected, wherein the tubular membrane microfiltration tank is sequentially connected with a sludge concentration tank and a plate-and-frame filter press, the plate-and-frame filter press is connected with the high-concentration wastewater adjusting tank, the nanofiltration device is sequentially connected with a concentrated water tank, a concentration device, a final concentrated water tank and a desalting device, the second reverse osmosis device is connected with the concentrated water tank, the concentration device is connected with the pH adjusting/intermediate water tank, and the desalting device is connected with the high-salt recycling tank; the multi-medium filter, the ultrafiltration device and the first reverse osmosis device are all connected with a high-concentration wastewater regulating tank.
The titanium sponge industrial wastewater treatment process comprises the following steps:
step A: classifying the waste water generated in different sections into high-concentration waste water and low-concentration waste water;
and B: treating the low-concentration wastewater by using a low-concentration wastewater treatment system;
and C: treating the high-concentration wastewater by using a high-concentration wastewater treatment system;
step D: and D, conveying the high-concentration wastewater generated in the step B to a high-concentration wastewater treatment system for treatment.
Preferably, the treatment process of the low-concentration wastewater in the step B specifically comprises the following steps:
b1: discharging the low-concentration wastewater into a low-concentration wastewater adjusting tank for mixing;
b2: conveying the wastewater in the low-concentration wastewater regulating tank to a multi-media filter to remove suspended matters, microorganisms and fine particles in the wastewater;
b3: introducing the wastewater filtered by the multi-medium filter into an ultrafiltration device, separating macromolecular solutes from small-molecular solutes and solvents in the wastewater, and then storing the small-molecular solutes and the solvents in an ultrafiltration water production tank;
b4: and (3) conveying the water in the ultrafiltration water producing tank to a reverse osmosis device, and removing charged ions, inorganic matters, colloidal particles, bacteria and organic substances in the water to obtain the water meeting the recycling requirement.
Preferably, before the wastewater filtered by the multi-media filter is introduced into the ultrafiltration device, sodium hypochlorite is added into the wastewater to oxidize, disinfect and sterilize the wastewater.
Preferably, a reagent storage tank is arranged at the front end of the conveying pipeline between the ultrafiltration water producing tank and the reverse osmosis device, and the reagent storage tank is used for adding a scale inhibitor and a reducing agent into the conveying pipeline to prevent the conveying pipeline from scaling.
Preferably, the treatment process of the high-concentration wastewater in the step C specifically comprises the following steps:
c1: discharging the high-concentration wastewater into a high-concentration wastewater adjusting tank for mixing;
c2: sequentially carrying out pH adjustment, softening and coagulating sedimentation on the mixed high-concentration wastewater;
c3: conveying the supernatant of the coagulation tank to a tubular membrane for microfiltration for pretreatment, and then conveying the supernatant to an intermediate water tank for pH adjustment, wherein the pH is adjusted to be neutral;
c4: conveying the water in the middle water tank to a nanofiltration device, conveying the filtered clear water to a reverse osmosis device, and conveying the strong brine generated after impurities are intercepted to a strong water tank;
c5: after reverse osmosis, the water reaching the recycling standard is sent to a high-salt water recycling pool, and strong brine is sent to a concentrated water pool;
c6: conveying the water in the concentrated water tank to a concentration device, and conveying the concentrated water to a final concentrated water tank after concentration;
c7: conveying the water in the final concentrated water tank to a desalting device for desalting treatment, and then conveying the water which is desalted and reaches the recycling standard to a high-salt water recycling tank to transport the generated miscellaneous salt;
c8: and (3) feeding sludge generated by tubular membrane microfiltration into a sludge concentration tank for concentration, then carrying out solid-liquid separation by using a plate-and-frame filter press, transporting the separated sludge outwards, and returning high-concentration water to a high-concentration water regulating tank.
Preferably, calcium hydroxide and sodium hydroxide are added to the wastewater, respectively, in step C2 to adjust the pH of the wastewater to 10.
Preferably, step C2 has the effect of softening the wastewater by adding sodium carbonate to the wastewater to react divalent calcium ions, divalent magnesium ions and carbonate to form insoluble matter.
Preferably, the specific method for conveying the high-concentration wastewater generated in the step B to a high-concentration wastewater treatment system for treatment is as follows: and conveying the high-concentration wastewater generated by the first reverse osmosis device and the high-concentration wastewater generated by the back washing of the multi-medium filter and the ultrafiltration device to a high-concentration wastewater regulating tank.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. through separately treating high-concentration wastewater and low-concentration wastewater, the high-concentration wastewater generated by the first reverse osmosis device and the high-concentration wastewater generated by the backwashing of the multi-medium filter and the ultrafiltration device are conveyed to a high-concentration wastewater treatment system for treatment, so that the treatment quality of the low-concentration wastewater is improved, the environmental pollution is avoided, the treatment capacity of the high-concentration wastewater is reduced, and the cost of wastewater treatment is reduced.
2. Clean water generated by the reverse osmosis of the low-concentration wastewater is directly recycled, and clean water generated by the reverse osmosis and desalination of the high-concentration wastewater is sent into a high-salt recycling pool for recycling, so that the recycling and zero discharge of all water are realized.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of the treatment process of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
The present invention will be described in detail with reference to fig. 1.
A titanium sponge industrial wastewater treatment system, referring to figure 1, comprises a low-concentration wastewater treatment system and a high-concentration wastewater treatment system, wherein the low-concentration wastewater treatment system comprises a low-concentration wastewater regulating tank, a multi-media filter, an ultrafiltration device, an ultrafiltration water production tank, a first reverse osmosis device and a reuse water tank which are connected in sequence; the high-concentration wastewater treatment system comprises a high-concentration wastewater adjusting tank, a two-stage pH adjusting tank, a softening reaction tank, a coagulation tank, a tubular membrane microfiltration tank, a pH adjusting/intermediate water tank, a nanofiltration device, a second reverse osmosis device and a high-salt recycling tank which are sequentially connected, wherein the tubular membrane microfiltration tank is sequentially connected with a sludge concentration tank and a plate-and-frame filter press, the plate-and-frame filter press is connected with the high-concentration wastewater adjusting tank, the nanofiltration device is sequentially connected with a concentrated water tank, a concentration device, a final concentrated water tank and a desalting device, the second reverse osmosis device is connected with the concentrated water tank, the concentration device is connected with the pH adjusting/intermediate water tank, and the desalting device is connected with the high-salt recycling tank; the multi-medium filter, the ultrafiltration device and the first reverse osmosis device are all connected with a high-concentration wastewater regulating tank.
A titanium sponge industrial wastewater treatment process specifically comprises the following steps:
and I, mixing low-concentration wastewater (the total flow of the wastewater generated by rainwater, concentrated water of a pure water station and circulating water pollution discharge is 20 cubic meters per hour) into a low-concentration wastewater regulating tank.
And II, conveying the wastewater in the low-concentration wastewater regulating pond to a multi-media filter at a speed of 20 cubic meters per hour by using a pump, and removing suspended matters, microorganisms and other fine particles in the wastewater.
And III, filtering the wastewater by using a multi-media filter, conveying the wastewater to an ultrafiltration device at a speed of 18.75 cubic meters per hour, arranging a reagent storage tank at the front end of a conveying pipeline, adding sodium hypochlorite (NaClO) into the reagent storage tank before entering the ultrafiltration device, and oxidizing, disinfecting and sterilizing the water. After the wastewater enters the ultrafiltration device, under a certain pressure, the small molecular solute and the solvent pass through a special membrane with a certain aperture, but the large molecular solute cannot permeate, so that the aim of separating the large molecular solute is fulfilled. The small molecule solutes and solvents were stored in the ultrafiltration product water tank at a rate of 17.25 cubic meters per hour.
And IV, conveying the water in the ultrafiltration water production tank to a first reverse osmosis device by using a pump, arranging a reagent storage tank at the front end of a conveying pipeline, adding a scale inhibitor and a reducing agent into the pipeline to prevent the conveying pipeline from scaling, feeding the wastewater into the first reverse osmosis device at a speed of 15 cubic meters per hour to remove charged ions, inorganic matters, colloidal particles, bacteria, organic substances and the like in the water, and feeding the water which meets the recycling requirement and is produced at a speed of 12.9 cubic meters per hour into a recycling tank and recycling the water to a cleaning working section.
V, conveying the high-concentration wastewater generated by reverse osmosis to a high-concentration wastewater regulating tank at the speed of 4.35 cubic meters per hour for treatment; conveying concentrated water generated by backwashing of the multi-media filter to a high-concentration wastewater regulating tank at a speed of 0.75 cubic meter per hour for treatment; high-concentration wastewater generated by backwashing of the ultrafiltration device is conveyed to a high-concentration wastewater adjusting tank at the speed of 1.5 cubic meters per hour for treatment.
And VI, mixing high-concentration wastewater (wastewater generated by flushing workshop equipment, emergency washing and flushing the workshop floor, wherein the total flow rate is 8.4 cubic meters per hour) into the high-concentration wastewater regulating tank.
And VII, conveying the high-concentration wastewater into a two-stage pH adjusting tank from a high-concentration wastewater adjusting tank by using a pump at a speed of 15.75 cubic meters per hour, and respectively adding calcium hydroxide and sodium hydroxide to adjust the pH to 10.
And VIII, enabling the wastewater to enter a softening reaction tank after passing through a pH adjusting tank, and adding sodium carbonate to enable divalent calcium ions, divalent magnesium ions and carbonate to react to generate insoluble substances.
IX, the softened wastewater enters a coagulation tank, and solid particles in the wastewater are subjected to flocculation and precipitation by adding a flocculating agent (polyaluminium chloride).
X, conveying the supernatant of the coagulation tank to a tubular membrane for microfiltration by a pump at the speed of 15.75 cubic meters per hour for pretreatment, removing sludge and other non-precipitated large-particle impurities, then carrying out pH adjustment in an intermediate water tank, and adding dilute hydrochloric acid to adjust the pH to be neutral; sludge generated by tubular membrane microfiltration enters a sludge concentration tank at the speed of 0.9 cubic meter per hour for concentration, then solid-liquid separation is carried out by a plate-and-frame filter press, the generated sludge is transported out at the speed of 0.15 cubic meter per hour, and wastewater returns to a high-concentration wastewater adjusting tank at the speed of 0.57 cubic meter per hour for treatment.
XI, the water in the middle pond is conveyed to a nanofiltration device (NF device) by a pump at the speed of 19.65 cubic meters per hour, and the filtered clean water is conveyed to a second reverse osmosis device at the speed of 16.65 cubic meters per hour. After impurities are intercepted, the wastewater is sent into a concentrated water tank at the speed of 3 cubic meters per hour, is sent to a concentration device (a disc-tube type reverse osmosis device) at the speed of 5.55 cubic meters per hour through a pump for concentration, then enters a final concentrated water tank at the speed of 0.75 cubic meters per hour, and water generated in the concentration process returns to an intermediate water tank at the speed of 4.8 cubic meters per hour.
XII, conveying the final concentrated water tank wastewater to a desalting device (a mechanical steam recompression device) by a pump for desalting treatment, allowing the produced distilled water to enter a high-salinity recycling tank at a speed of 0.68 cubic meters per hour, and transporting the produced miscellaneous salt at a speed of 70 kilograms per hour.
XIII, clear water enters a second reverse osmosis device at a speed of 16.65 cubic meters per hour after nanofiltration, water which reaches the recycling standard after reverse osmosis is sent to a high-salt water recycling pool at a speed of 14.1 cubic meters per hour, and concentrated brine returns to the concentrated water pool at a speed of 2.55 cubic meters per hour for continuous treatment.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (9)
1. A titanium sponge industrial wastewater treatment system is characterized by comprising a low-concentration wastewater treatment system and a high-concentration wastewater treatment system, wherein the low-concentration wastewater treatment system comprises a low-concentration wastewater regulating tank, a multi-media filter, an ultrafiltration device, an ultrafiltration water production tank, a first reverse osmosis device and a reuse water tank which are sequentially connected; the high-concentration wastewater treatment system comprises a high-concentration wastewater adjusting tank, a two-stage pH adjusting tank, a softening reaction tank, a coagulation tank, a tubular membrane microfiltration tank, a pH adjusting/intermediate water tank, a nanofiltration device, a second reverse osmosis device and a high-salt recycling tank which are sequentially connected, wherein the tubular membrane microfiltration tank is sequentially connected with a sludge concentration tank and a plate-and-frame filter press, the plate-and-frame filter press is connected with the high-concentration wastewater adjusting tank, the nanofiltration device is sequentially connected with a concentrated water tank, a concentration device, a final concentrated water tank and a desalting device, the second reverse osmosis device is connected with the concentrated water tank, the concentration device is connected with the pH adjusting/intermediate water tank, and the desalting device is connected with the high-salt recycling tank; the multi-medium filter, the ultrafiltration device and the first reverse osmosis device are all connected with a high-concentration wastewater regulating tank.
2. A titanium sponge industrial wastewater treatment process is characterized in that the titanium sponge industrial wastewater treatment system of claim 1 is adopted and carried out according to the following steps:
step A: classifying the waste water generated in different sections into high-concentration waste water and low-concentration waste water;
and B: treating the low-concentration wastewater by using a low-concentration wastewater treatment system;
and C: treating the high-concentration wastewater by using a high-concentration wastewater treatment system;
step D: and D, conveying the high-concentration wastewater generated in the step B to a high-concentration wastewater treatment system for treatment.
3. The titanium sponge industrial wastewater treatment process as claimed in claim 2, wherein the treatment process of the low-concentration wastewater in step B specifically comprises the following steps:
b1: discharging the low-concentration wastewater into a low-concentration wastewater adjusting tank for mixing;
b2: conveying the wastewater in the low-concentration wastewater regulating tank to a multi-media filter to remove suspended matters, microorganisms and fine particles in the wastewater;
b3: introducing the wastewater filtered by the multi-medium filter into an ultrafiltration device, separating macromolecular solutes from small-molecular solutes and solvents in the wastewater, and then storing the small-molecular solutes and the solvents in an ultrafiltration water production tank;
b4: and (3) conveying the water in the ultrafiltration water producing tank to a reverse osmosis device, and removing charged ions, inorganic matters, colloidal particles, bacteria and organic substances in the water to obtain the water meeting the recycling requirement.
4. The titanium sponge industrial wastewater treatment process as claimed in claim 3, wherein sodium hypochlorite is added to the wastewater filtered by the multi-media filter before the wastewater is introduced into the ultrafiltration device, so as to oxidize, disinfect and sterilize the wastewater.
5. The titanium sponge industrial wastewater treatment process as claimed in claim 3, wherein a reagent storage tank is arranged at the front end of the delivery pipeline between the ultrafiltration water production tank and the reverse osmosis device, and the reagent storage tank is used for adding a scale inhibitor and a reducing agent into the delivery pipeline to prevent the delivery pipeline from scaling.
6. The titanium sponge industrial wastewater treatment process as claimed in claim 2, wherein the treatment process of high concentration wastewater in step C specifically comprises the following steps:
c1: discharging the high-concentration wastewater into a high-concentration wastewater adjusting tank for mixing;
c2: sequentially carrying out pH adjustment, softening and coagulating sedimentation on the mixed high-concentration wastewater;
c3: conveying the supernatant of the coagulation tank to a tubular membrane for microfiltration for pretreatment, and then conveying the supernatant to an intermediate water tank for pH adjustment, wherein the pH is adjusted to be neutral;
c4: conveying the water in the middle water tank to a nanofiltration device, conveying the filtered clear water to a reverse osmosis device, and conveying the strong brine generated after impurities are intercepted to a strong water tank;
c5: after reverse osmosis, the water reaching the recycling standard is sent to a high-salt water recycling pool, and strong brine is sent to a concentrated water pool;
c6: conveying the water in the concentrated water tank to a concentration device, and conveying the concentrated water to a final concentrated water tank after concentration;
c7: conveying the water in the final concentrated water tank to a desalting device for desalting treatment, and then conveying the water which is desalted and reaches the recycling standard to a high-salt water recycling tank to transport the generated miscellaneous salt;
c8: and (3) feeding sludge generated by tubular membrane microfiltration into a sludge concentration tank for concentration, then carrying out solid-liquid separation by using a plate-and-frame filter press, transporting the separated sludge outwards, and returning high-concentration water to a high-concentration water regulating tank.
7. The process for treating industrial wastewater of titanium sponge according to claim 6, wherein calcium hydroxide and sodium hydroxide are added to the wastewater respectively in step C2 to adjust the pH of the wastewater to 10.
8. The process for treating industrial wastewater of titanium sponge according to claim 6, wherein step C2 is carried out by adding sodium carbonate into wastewater to react divalent calcium ion and divalent magnesium ion with carbonate to generate insoluble substance, thereby softening wastewater.
9. The titanium sponge industrial wastewater treatment process as claimed in claim 2, wherein the specific method for conveying the high-concentration wastewater generated in step B to a high-concentration wastewater treatment system for treatment comprises the following steps: and conveying the high-concentration wastewater generated by the first reverse osmosis device and the high-concentration wastewater generated by the back washing of the multi-medium filter and the ultrafiltration device to a high-concentration wastewater regulating tank.
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