CN108793647B - Water saving system and water saving method of water jet loom - Google Patents
Water saving system and water saving method of water jet loom Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 56
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001301 oxygen Substances 0.000 claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 26
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
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- 229910001415 sodium ion Inorganic materials 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 10
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
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- 229920002472 Starch Polymers 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000010840 domestic wastewater Substances 0.000 claims description 3
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 4
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
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- 229910052582 BN Inorganic materials 0.000 description 1
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- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a water saving system and a water saving method of a water jet loom, and belongs to the technical field of water jet looms. The method comprises the following steps: pretreatment, flocculation, biological oxygen aeration, micro-electrolysis, SBR treatment, quartz sand filtration, active carbon adsorption filtration, regeneration, blending and the like. The COD of the wastewater treated by the method is less than 8mg/L and BOD 5 Less than 3mg/L, ammonia nitrogen less than 1.5mg/L, P less than 0.2mg/L, pH of 6.7-7.5, ion concentration meeting the water requirement of water jet loom, saving water resource and reducing discharge.
Description
Technical Field
The invention belongs to the technical field of water-jet loom treatment, and particularly relates to a water-saving system and a water-saving method of a water-jet loom.
Background
The method has a plurality of textile enterprises in China, and the textile wastewater is wastewater discharged from textile factories mainly used for processing cotton, hemp, chemical fibers and blended products thereof, and the textile industrial wastewater has deep chromaticity, high organic pollutant content, large water quality change and complex composition; the waste water contains pollutants such as dirt, grease, salts and the like on textile fibers, various sizing agents, dyes, surfactants, assistants, acid and alkali which are added in the processing process, and the COD and BOD content in the waste water is high; the indexes such as chromaticity of the wastewater are usually far beyond the emission standard, the emission amount is large, the concentration is high, degradation is difficult, and the treatment difficulty is very high.
Waste water is discharged in each spinning process, such as sizing, drying and weaving (water jet loom), a large amount of waste water is generated, the COD value of the waste water generated by sizing can reach more than 2000, the BOD value can reach more than 400, the COD value of the waste water of the loom can reach more than 400, the BOD value can reach more than 60, and the COD value and the BOD value of domestic sewage, waste water from flushing water and the like are greatly changed.
At present, the textile wastewater treatment technology comprises a physical chemical method, a biochemical method, an electrochemical method, a chemical method, a photochemical method and the like, wherein the biochemical method is mainly used, and the chemical method is connected in series with the chemical method; various treatment processes have various characteristics on the treatment of textile printing and dyeing wastewater, but have certain limitations. According to the water quality characteristics of the textile printing and dyeing wastewater, the problems of alkalinity, difficult biodegradation, or extremely slow biodegradation speed of organic matters and the like of the textile wastewater need to be solved in the treatment process; the treatment method is mainly biological treatment method, and simultaneously needs to be assisted by necessary pretreatment and physicochemical advanced treatment method. The pretreatment mainly comprises the following steps: conditioning (water quality and water quantity homogenization), neutralization, grid filtration, sedimentation and the like. The common physical and chemical treatment processes are mainly a coagulating sedimentation method and a coagulating air method. In addition, electrolytic methods, bioactive carbon methods, chemical oxidation methods, and the like are sometimes used in textile wastewater treatment. The biological treatment process mainly adopts an aerobic method, and an activated sludge method, a biological contact oxidation method, a biological rotating disc, a tower type biological filter and the like are adopted at present. Anoxic and anaerobic processes have also been applied to textile wastewater treatment in order to improve the biodegradability of wastewater. The existing textile printing and dyeing wastewater treatment technology usually discharges the wastewater after the wastewater is simply treated and reaches the national secondary discharge standard (COD 40-120 and BOD 20-40), and the wastewater is difficult to recycle and can be used as flushing water.
The patent with application number of CN 200910136664. X discloses a method for treating textile printing and dyeing industrial wastewater, which comprises the following steps: a, pretreatment is carried out on high-chroma dyeing stock solution: injecting the high-chroma dyeing stock solution into a color reaction tank, and then adding a flocculating agent FeCl 3 The adding amount is 200-400mg/L high-chroma dyeing stock solution, and the retention time is 5-7h; b, homogenizing: b, putting the product obtained in the step A, other waste water and waste liquid and externally-guided organic waste water into an adjusting tank, wherein the retention time is 7-9h; c, biochemical treatment: the effluent of the regulating tank sequentially enters a hydrolysis acidification tank, an aerobic tank and a sedimentation tank, and the residence time of the sewage at the stage is 45-50h; d rear waddingAnd (3) condensing: adding a flocculating agent FeSO into the effluent of the step C 4 Performing post flocculation treatment; after treatment, the water quality of the effluent meets the I-level standard of Table 3 of GB4287-92 emission Standard of Water pollutants for textile dyeing and finishing industry.
The patent with the application number of CN 200510092957.8 discloses a process for treating and recycling textile printing and dyeing wastewater, which comprises the following steps: pretreatment, namely, a regulating tank in textile wastewater enters a primary air floatation tank through a lifting pump, impurities such as lint in the wastewater are further removed by regulating the reflux ratio and the dissolved air pressure of the air floatation tank, and the content of dissolved oxygen in the wastewater is increased; performing biochemical treatment, namely performing aerobic decomposition on the organic matters in the wastewater subjected to primary air flotation treatment by using a domesticated carrier type fluidized bed composite membrane mud reactor, stirring, aerating to keep the dissolved oxygen in the wastewater at a proper level, degrading most of the organic matters in the wastewater in the process, then entering an activated sludge tank, further performing aerobic decomposition on the organic matters, introducing the wastewater into a sedimentation tank after biological decomposition, and biologically refluxing the activated sludge deposited by the wastewater into a CBR (cubic boron nitride) reaction tank, wherein the effluent of the sedimentation tank reaches the discharge standard; after-treatment, the supernatant fluid of the secondary sedimentation tank flows out to a secondary air floatation tank, impurities, suspended particles and colloid in the wastewater are further removed by adjusting the reflux ratio and the dissolved air pressure of the air floatation tank, the water quality index of the wastewater effluent is guaranteed, then the wastewater is introduced into an ozone oxidation tank, organic matters which are difficult to explain in the biological treatment process are further degraded through the strong oxidizing property of ozone, and the chromaticity of the effluent is guaranteed by utilizing the decoloring performance of ozone. The patent can treat textile printing and dyeing wastewater with high pollution concentration, high chromaticity and unstable water quality.
Disclosure of Invention
The invention provides a water saving system and a water saving method of a water jet loom, which are used for treating water for textile and then delivering the treated water to the loom for use, thereby saving water resources. The technical scheme is as follows:
in one aspect, the embodiment of the invention provides a water saving system of a water jet loom, which comprises a wastewater treatment device and a regeneration device; the waste water treatment device comprises a waste water collecting tank, a grid tank, a reaction tank, a primary sedimentation tank, an oxygen-exposed biological filter tank, a secondary sedimentation tank, a micro-electrolysis reactor, an SBR reactor, a tertiary sedimentation tank and a clean water tank which are sequentially connected through pipelines, wherein a clay ceramsite filter material and a volcanic filter material are arranged in the oxygen-exposed biological filter tank, the volume ratio of the volcanic filter material to the clay ceramsite filter material is 1.5-2.0:1, scrap iron, coke and active carbon are arranged in the micro-electrolysis reactor, and the mass ratio of the scrap iron, the coke and the active carbon is 5-8:1:0.2-0.5; the regeneration device comprises a quartz sand filter, an activated carbon filter, a sodium ion exchanger, a high-concentration brine storage tank, a cation exchanger, an anion exchanger, a cation and anion exchanger, a low-concentration brine storage tank, a mixing tank and a sterilization structure, wherein the inlets of the clean water tank, the quartz sand filter and the activated carbon filter are sequentially connected through pipelines, the outlet of the activated carbon filter is respectively connected with the inlet of the sodium ion exchanger and the inlet of the cation exchanger through two paths of output, the outlet of the sodium ion exchanger, the high-concentration brine storage tank and the mixing tank are sequentially connected through pipelines, and the outlet of the cation exchanger, the anion exchanger, the cation and anion exchanger, the low-concentration brine storage tank and the mixing tank are sequentially connected through pipelines, and the sterilization structure is connected with the mixing tank.
Further, the sludge outlet of the third sedimentation tank in the embodiment of the invention is connected with the SBR reactor through a pipeline with a pump.
Specifically, the stacking density of the clay ceramsite filter material in the embodiment of the invention is 0.25-0.35g/cm 3 The porosity is 50-60%; the bulk density of the volcanic filter material is 0.25-0.35g/cm 3 The porosity is 50-60%.
Specifically, the oxygen-exposed biological filter in the embodiment of the invention comprises a filter body 1, a water inlet 2 and a backwash water inlet 3 which are vertically arranged at the bottom of the filter body 1, an air inlet 4 at the lower part of the filter body 1, a water outlet 5 at the upper part of the filter body 1, a filter material interception pore plate 6, a horsetail rope layer 7, a clay haydite filter material layer 8, a hollow plastic ball layer 9, a volcanic filter material layer 10, a cobblestone layer 11 and a bearing pore plate 12 which are sequentially arranged in the filter body 1 from top to bottom, wherein the upper part of the overflow tank 5 is provided with a water outlet, an air inlet distribution pipe connected with the air inlet 4 stretches into the cobblestone layer 11, the air inlet 4 is connected with a blower through a pipeline, the layer height of the horsetail rope layer 7 is 10-20cm, the layer height of the clay haydite filter material layer 8 is 50-75cm, the layer height of the hollow plastic layer 9 is 20-30cm, the layer height of the volcanic filter material layer 10 is 80-100cm, and the layer height of the cobblestone layer 11 is 15-30cm.
On the other hand, the embodiment of the invention also provides a water saving method of the water jet loom, which comprises the following steps:
(1) Pretreatment: collecting textile wastewater, removing impurities through a grid, and removing sand deposit through standing;
(2) Flocculation: adding acid to adjust the pH value of the wastewater to 3.5-5.0, adding flocculating agent polyaluminium chloride, wherein the dosage of the flocculating agent is 35-50mg/L of the wastewater, flocculating time is 0.5-3h, performing primary sedimentation after flocculation, and sending supernatant to the step (3);
(3) Biological oxygen exposure: adopting oxygen-enriched biological filter to make treatment, its hydraulic load is 7.5-14.0m 3 /(m 2 * d) The gas-water ratio is 2.5-5.0:1, secondary sedimentation is carried out after the treatment is finished, and the supernatant is sent to the step (4);
(4) Micro-electrolysis: adopting a micro-electrolysis reactor to treat the waste water, wherein the consumption of scrap iron is more than 3mg/L, the retention time is 4-7h, and the waste water is sent to the step (5) after the treatment is finished;
(5) SBR treatment: treating by adopting an SBR reactor, wherein the DO value is 1.5-4.0mg/L, the average concentration of anaerobic sludge is 5-10gSS/L, the treatment time is 4-7h, three times of sedimentation are carried out after the treatment is finished, and the supernatant is sent to the step (6);
(6) Filtering quartz sand: adopting a quartz sand filter for treatment, wherein the filtering speed is 4-12m/h, and the particle size of a quartz sand filter material is 0.5-3.0mm;
(7) Activated carbon adsorption filtration: adopting an activated carbon filter to process, wherein the filtering speed is more than 5m/h, the retention time is 0.2-1.0h, and the two paths of output are carried out after the processing is finished;
(8) Regeneration: the first path is treated by a sodium ion exchanger, and the second path is treated by a cation exchanger, an anion exchanger and an anion-cation exchanger;
(9) And (3) blending: mixing the two paths of clear water obtained in the step (8) and adding a medicament, wherein the mass ratio of the first path of clear water to the second path of clear water is 1:5-20, and finally sterilizing to obtain the water for the water-jet loom.
Wherein in the step (1), the textile wastewater comprises one or more of loom wastewater, sizing wastewater, domestic wastewater, drying condensed water and rainwater, and does not comprise printing and dyeing wastewater, but comprises at least one of loom wastewater and sizing wastewater.
Wherein in the step (3), a clay ceramsite filter material and a volcanic filter material are arranged in the oxygen-enriched biological filter, the volume ratio of the volcanic filter material to the clay ceramsite filter material is 1.5-2.0:1, and the stacking density of the clay ceramsite filter material is 0.25-0.35g/cm 3 The porosity is 50-60%; the bulk density of the volcanic filter material is 0.25-0.35g/cm 3 The porosity is 50-60%.
In the step (7), scrap iron, coke and active carbon are arranged in the micro-electrolysis reactor, wherein the mass ratio of the scrap iron to the coke to the active carbon is 5-8:1:0.2-0.5; before the scrap iron is used, the dirt, greasy dirt and an oxidation layer on the surface need to be cleaned; before the coke is used, the coke needs to be soaked in waste water for more than 48 hours, and the used waste water is loom waste water or waste water treated in the step (3).
Further, in the step (7), the greasy dirt is removed by soaking in ethanol, the greasy dirt is removed by washing with clear water, and the oxide layer is removed by soaking in hydrochloric acid.
Wherein in step (9), the agent comprises one or more of polyvinyl alcohol, acrylic slurry and esterified starch, and the sterilization method is ultraviolet sterilization.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: the COD of the wastewater treated by the method is less than 8mg/L and BOD 5 Less than 3mg/L, ammonia nitrogen less than 1.5mg/L, P less than 0.2mg/L, pH of 6.7-7.5, ion concentration meeting the water requirement of water jet loom, saving water resource and reducing discharge.
Drawings
FIG. 1 is a schematic block diagram of a water saving system of a water jet loom according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an oxygen-enriched biological filter provided by an embodiment of the invention;
fig. 3 is a flow chart of a water saving method of the water jet loom provided by the embodiment of the invention.
In the figure: the filter comprises a filter body 1, a water inlet 2, a backwashing water inlet 3, a water inlet 4, a water outlet 5, a filter material interception pore plate 6, a horsetail rope layer 7, a clay ceramsite filter material layer 8, a hollow plastic ball layer 9, a volcanic filter material layer 10, a cobble layer 11 and a supporting pore plate 12.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
Example 1
Referring to fig. 1, embodiment 1 provides a water saving system of a water jet loom, which includes a wastewater treatment device and a regeneration device; wherein the wastewater treatment device is mainly used for wastewater treatment and reducing COD value, BOD value, SS value, P content and NH 3 -N content and turbidity etc. comprising a wastewater collection tank, a grid tank, a reaction tank, a primary sedimentation tank, an oxygen aeration biological filter, a secondary sedimentation tank, a micro-electrolysis reactor, an SBR reactor, a tertiary sedimentation tank, a clean water tank etc. which are connected in sequence by a pipeline. Wherein, the waste water collecting tank and the grille tank can be combined into a whole, and the grille clearance is 15-30mm; the reaction tank is provided with stirring, the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank can be specifically inclined plate sedimentation tanks or vertical flow sedimentation tanks, the upper part of the reaction tank is provided with an overflow port, and the bottom of the reaction tank is provided with a sludge outlet; wherein, the oxygen-enriched biological filter adopts a special structure, adopts a mode of water inflow downwards, and is provided with a clay ceramsite filter material (at the upper part) and a volcanic filter material (at the lower part), and the volume ratio of the volcanic filter material to the clay ceramsite filter material is 1.5-2.0:1. The oxygen-enriched biological filter is used for treating insoluble matters so as to facilitate subsequent treatment and culturing bacteria meeting requirements for subsequent treatment. Wherein scrap iron, coke and active carbon are arranged in the micro-electrolysis reactor, the mass ratio of the scrap iron to the coke to the active carbon is 5-8:1:0.2-0.5, the size of the micro-electrolysis reactor is phi 0.2-0.5m, and the length of the micro-electrolysis reactor is 2-5m; the SBR reactor is of conventional construction. The micro-electrolysis reactor can remove toxic substances in the wastewater toEnsuring the effect of the SBR reactor.
Further, the oxygen-enriched biological filter and the micro-electrolysis reactor can be provided with circulation.
The regeneration device is mainly used for adjusting pH, ion content, hardness, conductivity and the like, and can slightly reduce COD value and BOD value; the device comprises a quartz sand filter, an activated carbon filter, a sodium ion exchanger, a high-concentration brine storage tank, a cation exchanger, an anion exchanger, a cation and anion exchanger, a low-concentration brine storage tank, a mixing tank, a sterilizing structure and the like. Wherein the size of the quartz sand filter is phi 0.5-1.2m; the size of the activated carbon filter is phi 0.5-1.2m; the sodium ion exchanger, the cation exchanger, the anion exchanger and the anion and cation exchanger are all conventional equipment for water treatment, and parameters can be adjusted according to the final requirements. Specifically, clean water pond, quartz sand filter and activated carbon filter's import is connected gradually through the pipeline, activated carbon filter's export divides two way output to pass through the pipeline respectively with sodium ion exchanger's import and cation exchanger's access connection, sodium ion exchanger's export, high concentration brine storage tank and mixing tank pass through the pipeline and connect gradually (obtain the pure water of certain salt concentration, make the concentration of harmless ion increase), cation exchanger's export, anion exchanger, anion and cation exchanger, low concentration brine storage tank and mixing tank pass through the pipeline and connect gradually (obtain pure water basically), make both water mix at the mixing tank make ion concentration accord with loom water's requirement, sterilization structure is connected with the mixing tank. The sterilization structure may be an ultraviolet sterilization structure, an ozone sterilization structure, or the like (preferably, chlorine ions are not introduced). The quartz sand filter plays a role in filtering to prolong the washing period of the activated carbon filter and has a certain evolution effect on water; the activated carbon filter plays an adsorption role to ensure the use of a subsequent exchanger and has a certain purification effect on water; the sodium ion exchanger, the cation exchanger, the anion exchanger and the anion and cation exchanger are used in the same manner as in the conventional manner.
The above structures are provided with pumps, valves, flow meters and the like on the pipelines according to the needs.
Further, a discharge port is arranged at the micro-electrolysis reactor, namely the waste water can be directly discharged after being treated by the micro-electrolysis reactor, and the waste water meets the national first-grade discharge standard (class A) or is used as flushing water and the like with lower requirements on water quality; a water supplementing port is arranged in the clean water tank, and tap water is supplemented when the water supply to the loom is insufficient.
Further, the sludge outlet of the third sedimentation tank in the embodiment of the invention is connected with the SBR reactor through a pipeline with a pump for supplementing sludge to the SBR reactor. Of course, the SBR reactor also uses sludge from the second sedimentation tank.
Specifically, the stacking density of the clay ceramsite filter material in the embodiment of the invention is 0.25-0.35g/cm 3 The porosity is 50-60%; the bulk density of the volcanic filter material is 0.25-0.35g/cm 3 The porosity is 50-60%.
Specifically, the oxygen-exposed biological filter in the embodiment of the invention comprises a filter body 1, a water inlet 2 and a back flushing water inlet 3 which are vertically arranged at the bottom of the filter body 1, an air inlet 4 at the lower part of the filter body 1, a water outlet 5 at the upper part of the filter body 1, a filter material interception pore plate 6, a horsetail rope layer 7, a clay ceramsite filter material layer 8, a hollow plastic ball layer 9, a volcanic filter material layer 10, a cobble layer 11, a bearing pore plate 12 and the like which are sequentially arranged in the filter body 1 from top to bottom. The filter body 1 can be a cylindrical structure made of stainless steel or concrete. The filter material interception pore plate 6 and the bearing pore plate 12 are horizontally fixed on the filter body 1, holes are uniformly distributed on the filter body, gas and wastewater can pass through the filter material, and the filter material can not pass through the filter material. The filter material interception orifice plate 6 is used for preventing the filter material from flowing out. One of the functions of the Ma Weisheng layer 7 is to compress (not too tightly) the filter material and enable the filter material to move upwards, and the other is to uniformly discharge water, so that the wastewater is fully contacted with the filter material; the hollow plastic ball layer 9 is filled by hollow polyhedron or hollow spherical filler; the anti-blocking layer is used for changing the water flow direction, so that the integral compaction of the filter material layer is avoided, and the void ratio is reduced; simultaneously separating the clay haydite filter layer 8 from the volcanic filter layer 10; and the clay ceramsite filter material layer 8 and the volcanic rock filter material layer 10 are smoothly transited. The cobble layer 11 is filled with cobbles with the size of 15-25mm, and plays a role in supporting the filter material layer and facilitating ventilation in the filter. The clay ceramsite filter material layer 8 and the volcanic filter material layer 10 play roles of physical filtration and biomembrane foundation bed, and through the cooperation of the two filter materials, the clay ceramsite filter material layer has a large removal rate for N and P, is beneficial to the falling off and generation of biomembrane, prolongs the backwashing period by at least 1.5 times compared with a filter material, reduces the flushing time by 20-30%, and reduces the flushing water. The air inlet distribution pipe connected with the air inlet 4 stretches into the cobble layer 11, and the air inlet 4 is connected with the air blower through a pipeline. Wherein the layer height of the Ma Weisheng layer 7 is 10-20cm, the layer height of the clay ceramsite filter layer 8 is 50-75cm, the layer height of the hollow plastic ball layer 9 is 20-30cm, the layer height of the volcanic filter layer 10 is 80-100cm, and the layer height of the cobble layer 11 is 15-30cm.
In this embodiment, a common biological filter (without oxygen aeration) for downward flow of wastewater is not adopted, but a mode of upward flow and oxygen aeration of wastewater is adopted. The wastewater flows upwards to lead the air distribution and the water distribution to be uniform; if downward flow is adopted, the trapped SS is mainly concentrated at the upper part of the filter material, the filter tank has a long running time, a negative water head phenomenon can occur in the filter tank, channeling is caused, and the upward flow can be avoided; by adopting upward flow, the SS trapped at the bottom can be brought into the middle upper part of the filter tank in the rising process of bubbles, so that the dirt receiving rate of the filter material is increased, and the backwashing interval time is prolonged.
The working process of the oxygen-enriched biological filter is described below with reference to fig. 2: when the wastewater is filtered, the wastewater is continuously contacted with the filter material of the filter material layer, and air is introduced, so that microorganisms are propagated on the surface of the filter material to form a biological film. The dissolved organics are degraded by biology (aerobic metabolism) and the suspended matter is removed by filtration of the filter material. After a period of operation, suspended matters and falling biological films in the sewage are accumulated in the filler, a water flow channel is blocked, the hydraulic load of the filter tank is reduced, and back flushing is performed at the moment. During back flushing, the water inlet is closed, and the water after sedimentation treatment or clean water is introduced from the back flushing water inlet and is flushed for 3-5 minutes at a high flow rate. And then opening the air inlet for ventilation, simultaneously ventilating and introducing water for 3-5 minutes, closing the air inlet, and introducing water for 3-5 minutes, and repeating until the blockage is eliminated (preferably a small amount of biological film is reserved).
Example 2
Referring to fig. 1 and 3, embodiment 2 provides a water saving method of a water jet loom, using the system provided in embodiment 1, the method comprising the steps of:
(1) Pretreatment: the textile wastewater is collected by a wastewater collection tank, impurities are removed by a grid through a grid tank, and sediment is removed by standing by the wastewater collection tank and the grid tank.
(2) Flocculation: adding acid (such as hydrochloric acid or sulfuric acid) into a reaction tank to adjust the pH value of the wastewater to 3.5-5.0, adding flocculating agent polyaluminium chloride, wherein the dosage of the flocculating agent is 35-50mg/L of the wastewater, flocculating time is 0.5-3h, adopting a primary sedimentation tank to carry out primary sedimentation after flocculation, and sending supernatant to the step (3).
(3) Biological oxygen exposure: adopting oxygen-enriched biological filter to make treatment, its filtering speed is 0.3-0.7m/h, hydraulic load is 7.5-14.0m 3 /(m 2 * d) The gas-water ratio is 2.5-5.0:1, a secondary sedimentation tank is adopted for secondary sedimentation after the treatment is completed, and the supernatant is sent to the step (4).
(4) Micro-electrolysis: the micro-electrolysis reactor is adopted for treatment, the consumption of scrap iron is more than 3mg/L (usually 3-10 mg/L) of wastewater, the residence time is 4-7h (circulation), and the wastewater is sent to the step (5) after the treatment is finished.
(5) SBR treatment: treating by adopting an SBR reactor, wherein the DO value is 1.5-4.0mg/L, the average concentration of anaerobic sludge is 5-10gSS/L wastewater (regulated by sludge of a triple sedimentation tank), the treatment time is 4-7h, and after the treatment is finished, three sedimentation is carried out by adopting the triple sedimentation tank, and the supernatant is sent to the step (6).
(6) Filtering quartz sand: adopting quartz sand filter to process, the filtering speed is 4-12m/h, and the particle size of quartz sand filter material is 0.5-3.0mm.
(7) Activated carbon adsorption filtration: the specific surface area is preferably more than 2000m by adopting an activated carbon filter for treatment 2 And/g, the filtering speed is more than 5m/h (usually 5-10 m/h), the residence time is 0.2-1.0h, and the two paths of output are realized after the treatment is finished.
(8) Regeneration: the first path is treated by a sodium ion exchanger, and the second path is treated by a cation exchanger, an anion exchanger and an anion-cation exchanger.
(9) And (3) blending: mixing the two paths of clear water obtained in the step (8) and adding a medicament, wherein the mass ratio of the first path of clear water to the second path of clear water is 1:5-20 (the clear water is adjusted according to actual demands and the parameters of each exchanger can be adjusted in a matching way), and finally sterilizing to obtain the water for the water-jet loom.
Wherein, the sludge separated in the steps (2), (3) and (5) is sent to a sludge tank, and then is concentrated and sent to a qualified unit for treatment, and the liquid generated during concentration is sent to the step (3) for treatment.
Wherein, in the step (1), the textile waste water comprises one or more of loom waste water, sizing waste water, domestic waste water, drying condensed water, rainwater and the like, and does not comprise printing and dyeing waste water, but comprises at least one of loom waste water and sizing waste water. Specifically, the applicant has examined the wastewater of 17 textile enterprises (without printing and dyeing workshops) with the parameters shown in table 1:
TABLE 1
| COD(mg/L) | BOD(mg/L) | TP(mg/L) | NH 3 -N(mg/L) | pH | SS(mg/L) | |
| Index (I) | 700-1500 | 50-300 | 0.4-2.5 | 8-30 | 6-9 | 120-320 |
Namely, the indexes of the textile wastewater of the embodiment are as follows: COD (Mn) 700-1500mg/L and BOD 5 50-300mg/L, SS120-320mg/L, pH6-9, ammonia nitrogen 8-30mg/L, TP0.4-2.5mg/L.
Wherein in the step (3), the oxygen-enriched biological filter is provided with a clay ceramsite filter material and a volcanic filter material, the volume ratio of the volcanic filter material to the clay ceramsite filter material is 1.5-2.0:1, and the stacking density of the clay ceramsite filter material is 0.25-0.35g/cm 3 The porosity is 50-60%; the bulk density of the volcanic filter material is 0.25-0.35g/cm 3 The porosity is 50-60%.
Wherein in the step (7), scrap iron, coke and active carbon are arranged in the micro-electrolysis reactor, and the mass ratio of the scrap iron to the coke to the active carbon is 5-8:1:0.2-0.5; before the scrap iron is used, the dirt, greasy dirt and an oxidation layer on the surface need to be cleaned; before the coke is used, the waste water is soaked for more than 48 hours, and the used waste water is loom waste water or waste water treated in the step (3).
Further, in the step (7), greasy dirt is removed by soaking in ethanol (e.g. soaking for 5-20 min), dirt is removed by washing with clean water, and the oxide layer is removed by soaking in hydrochloric acid (e.g. soaking in 0.5-2.0mol/L hydrochloric acid for 5-30 min).
Wherein in the step (9), the agent comprises one or more of polyvinyl alcohol, acrylic slurry, esterified starch and the like, and the sterilization method is ultraviolet sterilization or ozone sterilization, preferably ultraviolet sterilization.
The COD of the wastewater treated by the method is less than 8mg/L and BOD 5 Less than 3mg/L, ammonia nitrogen less than 1.5mg/L, P less than 0.2mg/L, pH of 6.7-7.5, and ion concentration meeting the water requirement of a water jet loom.
Example 3
Example 3 is basically the same as the method of example 2, and the treatment (removal rate) of each step is as follows:
and (2) flocculation: COD68.4%, BOD55.9%, TP75.3%, NH 3 -N0%；
Step (3) biological oxygen exposure: COD68.3%, BOD78.9%, TP39.5%, NH 3 -N72.8%；
Step (4) micro-electrolysis: COD67.4%, BOD12.9%, TP10.4%, NH 3 -N 19.8%；
Step (5) SBR treatment: COD64.5%, BOD68.8%, TP50.9%, NH 3 -N 60.8%；
And (6) filtering quartz sand: COD20.8%, BOD7.9%, TP10.7%, NH 3 -N 0%；
And (7) activated carbon adsorption filtration: COD25.7%, BOD48.3%, TP < 5%, NH 3 -N＜10%；
Regenerating in the step (8) and blending in the step (9): COD11.4%, BOD10.7%, TP < 5% and N0 < 5%.
The results are shown in tables 2, 3 and 4:
TABLE 2
TABLE 3 Table 3
TABLE 4 Table 4
| COD(mg/L) | BOD(mg/L) | TP(mg/L) | NH 3 -N(mg/L) | pH | |
| Before treatment | 880 | 170 | 1.4 | 12 | 6.9 |
| After treatment | 5.3 | 1.7 | 0.07 | 0.9 | 7.2 |
The results are shown in Table 5 by comparison with the loom water requirement:
TABLE 5
| Demand value | Actual measurement value | |
| pH value of | 6.7-7.5 | 7.2 |
| Total hardness (mg/L) | ＜30 | 27.4 |
| M alkalinity (mg/L) | ＜60 | 42.1 |
| Chlorine root (mg/L) | ＜20 | 18.5 |
| Conductivity (mu S/cm) | 80-150 | 143 |
| COD(mg/L) | ＜8 | 5.3 |
| Turbidity (mg/L) | ＜3 | Satisfy the following requirements |
As can be seen from the data in Table 5, the wastewater treated by the method of the invention meets the water requirement of the loom, can save a large amount of water and reduce the discharge of a large amount of wastewater.
Example 4
Example 4 was essentially the same as example 2, using another textile enterprise wastewater, and the results are shown in table 6:
TABLE 6
| COD(mg/L) | BOD(mg/L) | TP(mg/L) | NH 3 -N(mg/L) | pH | |
| Before treatment | 1230 | 275 | 2.4 | 19 | 6.5 |
| After treatment | 7.1 | 2.9 | 0.14 | 1.1 | 7.1 |
As can be seen from the data in table 6, the index also satisfies the loom water requirement.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (5)
1. A water saving method of a water jet loom, characterized in that the method comprises the following steps:
(1) Pretreatment: collecting textile wastewater, removing impurities through a grid, and removing sand deposit through standing;
(2) Flocculation: adding acid to adjust the pH value of the wastewater to 3.5-5.0, adding flocculating agent polyaluminium chloride, wherein the dosage of the flocculating agent is 35-50mg/L of the wastewater, flocculating time is 0.5-3h, performing primary sedimentation after flocculation, and sending supernatant to the step (3);
(3) Biological oxygen exposure: adopting oxygen-enriched biological filter to make treatment, its hydraulic load is 7.5-14.0m 3 /(m 2 * d) The gas-water ratio is 2.5-5.0:1, secondary sedimentation is carried out after the treatment is finished, and the supernatant is sent to the step (4);
(4) Micro-electrolysis: adopting a micro-electrolysis reactor to treat the waste water, wherein the consumption of scrap iron is more than 3mg/L, the retention time is 4-7h, and the waste water is sent to the step (5) after the treatment is finished;
(5) SBR treatment: treating by adopting an SBR reactor, wherein the DO value is 1.5-4.0mg/L, the average concentration of anaerobic sludge is 5-10gSS/L, the treatment time is 4-7h, three times of sedimentation are carried out after the treatment is finished, and the supernatant is sent to the step (6);
(6) Filtering quartz sand: adopting a quartz sand filter for treatment, wherein the filtering speed is 4-12m/h, and the particle size of a quartz sand filter material is 0.5-3.0mm;
(7) Activated carbon adsorption filtration: adopting an activated carbon filter to process, wherein the filtering speed is more than 5m/h, the retention time is 0.2-1.0h, and the two paths of output are carried out after the processing is finished;
(8) Regeneration: the first path is treated by a sodium ion exchanger, and the second path is treated by a cation exchanger, an anion exchanger and an anion-cation exchanger;
(9) And (3) blending: mixing the two paths of clear water obtained in the step (8) and adding a medicament, wherein the mass ratio of the first path of clear water to the second path of clear water is 1:5-20, and finally sterilizing to obtain water for the water-jet loom;
the textile wastewater comprises one or more of loom wastewater, sizing wastewater, domestic wastewater, drying condensed water and rainwater, and does not comprise printing and dyeing wastewater, but at least comprises one of loom wastewater and sizing wastewater;
the oxygen-exposed biological filter comprises a filter body (1), a water inlet (2) and a back flushing water inlet (3) which are vertically arranged at the bottom of the filter body (1), a water inlet (4) at the lower part of the filter body (1), a water outlet (5) at the upper part of the filter body (1) and a filter material interception pore plate (6), a horsetail rope layer (7), a clay ceramsite filter layer (8), a hollow plastic ball layer (9), a volcanic filter layer (10), a cobble layer (11) and a bearing pore plate (12) which are sequentially arranged in the filter body (1) from top to bottom, wherein an air inlet distribution pipe connected with the air inlet (4) stretches into the cobble layer (11), the air inlet (4) is connected with a blower through a pipeline, the layer height of the Ma Weisheng layer (7) is 10-20cm, the layer height of the clay ceramsite filter layer (8) is 50-75cm, the layer height of the hollow plastic ball layer (9) is 20-30cm, and the layer height of the volcanic filter layer (10) is 80-100cm, and the layer height of the cobble layer (11-30 cm.
2. The water saving method according to claim 1, wherein in the step (3), the oxygen-exposed biological filter is provided with a clay ceramsite filter material and a volcanic filter material, the volume ratio of the volcanic filter material to the clay ceramsite filter material is 1.5-2.0:1, and the stacking density of the clay ceramsite filter material is 0.25-0.35g/cm 3 The porosity is 50-60%; the bulk density of the volcanic filter material is 0.25-0.35g/cm 3 The porosity is 50-60%.
3. The water saving method according to claim 1, wherein in the step (4), scrap iron, coke and activated carbon are arranged in the micro-electrolysis reactor, and the mass ratio of the scrap iron to the coke to the activated carbon is 5-8:1:0.2-0.5; before the scrap iron is used, the dirt, greasy dirt and an oxidation layer on the surface need to be cleaned; before the coke is used, the coke needs to be soaked in waste water for more than 48 hours, and the used waste water is loom waste water or waste water treated in the step (3).
4. A water conservation method according to claim 3, wherein in step (4), the greasy dirt is removed by soaking in ethanol, the dirt is removed by washing with clear water, and the oxide layer is removed by soaking in hydrochloric acid.
5. The water conservation method according to claim 1, wherein in step (9), the agent comprises one or more of polyvinyl alcohol, acrylic slurry, and esterified starch, and the sterilization method is ultraviolet sterilization.
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|---|---|---|---|
| CN201811049775.2A CN108793647B (en) | 2018-09-10 | 2018-09-10 | Water saving system and water saving method of water jet loom |
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| CN201811049775.2A CN108793647B (en) | 2018-09-10 | 2018-09-10 | Water saving system and water saving method of water jet loom |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030000039A (en) * | 2001-06-22 | 2003-01-06 | 김봉석 | Device for recycling wastewater used in water jet loom and method of it |
| CN101700943A (en) * | 2009-11-19 | 2010-05-05 | 东华大学 | Printing and dyeing waste water advanced treatment recovery method |
| CN103159372A (en) * | 2011-12-09 | 2013-06-19 | 青岛科技大学 | Treatment method for wheat straw pulping black liquor |
| CN208949092U (en) * | 2018-09-10 | 2019-06-07 | 湖北丰帛纺织有限公司 | A kind of water-saving system of water-jet loom |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030000039A (en) * | 2001-06-22 | 2003-01-06 | 김봉석 | Device for recycling wastewater used in water jet loom and method of it |
| CN101700943A (en) * | 2009-11-19 | 2010-05-05 | 东华大学 | Printing and dyeing waste water advanced treatment recovery method |
| CN103159372A (en) * | 2011-12-09 | 2013-06-19 | 青岛科技大学 | Treatment method for wheat straw pulping black liquor |
| CN208949092U (en) * | 2018-09-10 | 2019-06-07 | 湖北丰帛纺织有限公司 | A kind of water-saving system of water-jet loom |
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