CN110759529B - Method and system for degassing reuse water - Google Patents

Method and system for degassing reuse water Download PDF

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Publication number
CN110759529B
CN110759529B CN201911056790.4A CN201911056790A CN110759529B CN 110759529 B CN110759529 B CN 110759529B CN 201911056790 A CN201911056790 A CN 201911056790A CN 110759529 B CN110759529 B CN 110759529B
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water
degassing
reuse
tower
reuse water
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CN110759529A (en
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李伟
***
鲍喜翔
张骁
李立敏
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Xindi Environmental Protection Technology Co ltd
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Xindi Environmental Protection Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia

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  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)
  • Degasification And Air Bubble Elimination (AREA)

Abstract

The invention relates to the technical field of wastewater treatment, and particularly discloses a reuse water degassing method and a degassing system thereof, wherein the reuse water degassing method comprises the following steps: step one, if the HCO in the water is recycled3 ‑And CO3 2‑Total molar content of more than or equal to NH4 +The pH value of the reuse water is adjusted to 4-5 according to the molar content of the water; if NH in the reclaimed water4 +Molar content of > HCO3 ‑And CO3 2‑Adjusting the pH of the reuse water to 10-11; and step two, introducing the recycled water subjected to pH adjustment into a degassing tower, and performing degassing treatment by using the atmospheric liquid ratio of the recycled water to obtain treated water. The method for degassing the reuse water can remove carbonate, bicarbonate radical, ammonia nitrogen, micromolecular organic matters and gas molecules contained in the water, and has high removal efficiency and stable removal effect.

Description

Method and system for degassing reuse water
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method and a system for degassing reuse water.
Background
The reuse water is an available water resource for industrial production or domestic water supply obtained after industrial wastewater or domestic sewage is subjected to biochemical treatment or other advanced treatment, and the reuse water obtained by biochemical treatment or other advanced treatment at present contains dissolved ammonia nitrogen and small molecular organic matters or carbonate, bicarbonate and free carbon dioxide and small molecular organic matters to different degrees, so that the quality of further industrial production supply or domestic water supply is influenced.
For ammonia nitrogen and small molecular organic matters or carbonate, bicarbonate, free carbon dioxide, small molecular organic matters and the like contained in the reclaimed water, the traditional removal method comprises the methods of degassing tower removal, reverse osmosis interception, resin adsorption, activated carbon adsorption and advanced oxidation; the degassing tower can only remove the free carbon dioxide component in water, and cannot remove the ionic carbonate, bicarbonate radical, ammonia nitrogen and small molecular organic matters; the reverse osmosis device can effectively intercept ions in water, free carbon dioxide, ammonia gas and small molecular organic matters with molecular weight less than 100 can easily permeate the permeable membrane, the treatment effect is poor, and the device cost and the maintenance cost are higher; the resin and the activated carbon are suitable for water with relatively low content of the substances, but organic substances can cause organic pollution of the resin and reduce the regeneration capacity of the resin, and a large amount of regeneration medicaments or a high-energy-consumption regeneration device are needed for the regeneration of the resin and the activated carbon; the advanced oxidation has efficient oxidative decomposition effect on organic matters and ammonia nitrogen, but the defects of high energy consumption and high cost exist in the advanced oxidation generally, and some advanced oxidation methods also accumulate byproducts, such as iron mud generated by Fenton oxidation, which is dangerous waste which is difficult to degrade.
Disclosure of Invention
The invention provides a method and a system for degassing recycled water, which aim to solve the problems that an existing recycled water treatment device is poor in removal efficiency of ionic carbonate and bicarbonate radical or ammonia nitrogen and small molecular organic matters in the recycled water, high in equipment requirement, high in treatment cost and prone to generating other harmful byproducts.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
a method for degassing reuse water, comprising at least the steps of:
step one, adjusting the pH value of the reuse water, if the reuse water contains HCO3 -And CO3 2-Total molar content of more than or equal to NH4 +The pH value of the reuse water is adjusted to 4-5 according to the molar content of the water; if NH in the reclaimed water4 +Molar content of > HCO3 -And CO3 2-Adjusting the pH of the reuse water to 10-11;
step two, the recycled water with the adjusted pH value enters a degassing tower, and the gas-liquid ratio in the degassing tower is set to be 0.1-0.3m3And/kg, the flow rate of the upward gas flow is 10-30m/s, the downward recycled water entering the degassing tower is enabled to act with the upward gas flow, and the degassing treatment of the recycled water is carried out to obtain the treated water.
Compared with the prior art, the method for degassing the reuse water provided by the invention has the advantages that the reuse water is subjected to specific pH adjustment, corresponding substances can be removed in a targeted manner after entering the degassing tower, and the gas-liquid ratio is 0.1-0.3m3In a degassing tower with the flow rate of 10-30m/s and the pH of the reuse water of 4-5, HCO in the reuse water can be promoted3 -And CO3 2And NH4 +Double hydrolysis occurs and CO is converted into free CO2And NH3And removed from the reuse water in HCO3 -And CO3 2-In case of high content of (b), the excess HCO in the reuse water can be simultaneously used3 -And CO3 2-Conversion of ions to free CO2And removed from the water; at a gas-liquid ratio of 0.1-0.3m3In a degassing tower with the flow rate of 10-30m/s and the pH value of the reuse water of 10-11, HCO in the reuse water can be promoted3 -And CO3 2-And NH4 +Double hydrolysis occurs and CO is converted into free CO2And NH3And removing the excess NH from the reuse water4 +All converted to free NH3And is removed from the reuse water; on the other hand, at a gas-liquid ratio of 0.1 to 0.3m3CO dissociated and separated from recycled water in a degassing tower with the gas flow rate of 10-30m/s at/kg2And NH3Can promote the precipitation and removal of a small amount of organic matters contained in the reuse water, further reduce the TOC content of the reuse water and greatly improve the water quality of the reuse water.
The method of the invention is based on the HCO in the reuse water3 -And CO3 2-And NH4 +The content of (A) can be adjusted correspondingly to the pH value, and the reuse water can be removedCO3 2-Or NH4 +Meanwhile, the organic matters with low boiling point in the reclaimed water are removed, the process flow is simple, and the removal effect is stable.
Preferably, the flow rate of the recycled water in the degassing tower is 0.005-0.015 m/s.
The flow rate of the recycled water entering the degassing tower can ensure the sufficient contact between the recycled water and the air flow, and the treatment efficiency of the recycled water is improved.
The invention also provides a degassing system using the method for degassing the reuse water, which comprises a water inlet device, a pH adjusting device and a degassing tower which are sequentially communicated;
the top of the degassing tower is provided with an exhaust port, the bottom of the degassing tower is provided with a drainer, and a water distributor, a degassing filler and an air guide mechanism for controlling the wind direction to be upward are sequentially arranged in the tower from top to bottom; the water distributor is communicated with the pH adjusting device.
Compared with the prior art, the degassing system provided by the invention has the advantages that the water distributor can realize that the reuse water enters the degassing tower and then is uniformly distributed in the degassing filler, so that the reuse water is fully contacted with the upward airflow, and the upward airflow is favorable for taking out and thoroughly removing free products in the water; the wind guide mechanism can realize that the wind direction of the wind blown out by the fan is upward, and impact and full contact on the recycled water in the degassing filler are realized; the whole degassing system is simple in structure and convenient to operate, can realize high-efficiency continuous treatment on the reuse water, can remove various substances such as free gas, ammonia nitrogen, micromolecular organic matters, carbonate and bicarbonate radical in the reuse water, has stable removal effect, and breaks through the defect that a common degassing tower can only remove free CO in the reuse water2The limitations of (2).
Preferably, the water inlet device comprises a water inlet pump and a one-way water valve. Wherein, the pipeline diameter among the water installations and the relation of the velocity of flow of intaking are: when the diameter of the pipeline is less than 250mm, the inflow velocity is 1.0-1.2 m/s; when the diameter of the pipeline is 250-1000mm, the flow rate of inlet water is 1.2-1.6 m/s; when the diameter of the pipeline is more than 1000mm, the flow rate of the inlet water is 1.5-2.0m/s, and the flow rate of the water entering the water distributor of the degassing tower is adapted to the degassing efficiency of the degassing tower by controlling the relation between the diameter of the pipeline in the water inlet device and the flow rate of the inlet water.
Preferably, a water mist collecting net is arranged between the exhaust port and the water distributor, and the water mist collecting net is composed of pall ring fillers.
The water mist collecting net is arranged below the air outlet, so that part of water vapor brought out by the air flow can be effectively prevented from being discharged from the air outlet, a small amount of water mist formed by air flow blowing-off is collected, and corrosion to equipment is reduced.
Preferably, the water distributor is a spray nozzle or a fishbone-shaped wire winding pipe bundle with a plurality of spray holes uniformly arranged.
The spray nozzle and the fishbone-shaped wire winding tube bundle provided with the spray holes are combined with the degassing filler, so that water can be uniformly fed, and the degassing efficiency is improved.
Preferably, the degassing filler is a polypropylene hollow sphere with the particle size of 20-25 mm.
Preferably, the degassed filler has a thickness of 1.2 to 1.5 m.
The thickness of the degassing packing allows sufficient contact and interaction time of the reuse water with the upward gas flow.
Preferably, the air guide mechanism comprises a fan and an air guide plate arranged in an inclined manner, the high end of the air guide plate is fixed on the inner wall of the degassing tower, the horizontal position of the low end is located below the air outlet of the fan, and a gap for treated water to fall is formed between the air guide plate and the tower wall of the degassing tower, wherein the air pressure of the fan satisfies: the wind pressure is larger than the thickness (m) multiplied by 1kPa of the filler layer.
Preferably, the width of the air deflector is 1/3-1/2 of the diameter of the degassing tower.
The arrangement of the air deflector can control the airflow blown out by the fan to vertically flow upwards, so that the degassing efficiency is improved; due to CO in the air blown by the fan2Very low content of CO2The partial pressure of (A) is only about 0.03% of the atmospheric pressure, so that when air comes into contact with reuse water, CO in the water2Then separated out and taken away by air and discharged to the atmosphere from the air outlet 3, and in the same way, NH in the air blown by the fan3Less content of NH in water3Precipitated and carried away by air.
Preferably, the drainer comprises a water collecting funnel and a drain pipe communicated with the bottom of the water collecting funnel. Wherein, the drain pipe is acid and alkali resistant material, and the ratio of the pipe diameter to the drain flow rate is kept between 0.4 and 0.8 m/s.
Drawings
FIG. 1 is a schematic structural view of a reuse water degassing system in an embodiment of the present invention;
the device comprises a water inlet pump 1, a one-way water valve 2, a pH adjusting device 3, an exhaust port 4, a water mist collecting net 5, a water distributor 6, a degassing filler 7, a fan 9, an air deflector 10, a water collecting funnel 11, a drain pipe 12 and a water storage device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a method for degassing reuse water, which comprises the following steps:
step one, adjusting the pH value of the reuse water, if the reuse water contains HCO3 -And CO3 2-Total molar content of more than or equal to NH4 +The pH value of the reuse water is adjusted to 4-5 according to the molar content of the water; if NH in the reclaimed water4 +Molar content of > HCO3 -And CO3 2-Adjusting the pH of the reuse water to 10-11;
step two, the reuse water with the adjusted pH value enters a degassing tower, the flow rate of the reuse water in the degassing tower is 0.005-0.015m/s, and the gas-liquid ratio in the degassing tower is set to be 0.1-0.3m3And/kg, the flow rate of the upward gas flow is 10-30m/s, the downward recycled water entering the degassing tower is enabled to act with the upward gas flow, and the degassing treatment of the recycled water is carried out to obtain the treated water.
The degassing system of the recycling water degassing method comprises a water inlet device, a pH adjusting device 3 and a degassing tower;
the top of the degassing tower is provided with an exhaust port 4, the bottom of the degassing tower is provided with a drainer, and a water distributor 6, a degassing filler 7 and an air guide mechanism for controlling the wind direction to be upward are sequentially arranged in the tower from top to bottom; the water distributor 6 is communicated with a water inlet device to form a degassing tower; the water inlet device comprises a water inlet pump 1 and a one-way water valve 2, wherein the diameter of a pipeline in the water inlet device is 200mm, and the flow rate of inlet water is 1 m/s; a water mist collecting net 5 consisting of pall ring packing is arranged between the exhaust port 4 and the water distributor 6; the water distributor 6 is a spray nozzle with the same diameter as the inner part of the degassing tower; the degassing filler 7 consists of polypropylene hollow spheres with the particle size of 20mm, and the thickness of the degassing filler 7 is 1.2-1.5 m; air guide mechanism includes fan 8 and the aviation baffle 9 that the slope set up, the high-end of aviation baffle 9 is fixed on the degasser inner wall, the horizontal position of low side is located fan 8 air outlet below, and with the space that supplies the processing water whereabouts has between the tower wall of degasser, the width of aviation baffle 9 is 1/2 of degasser diameter, and the wind pressure that fan 8 blew off satisfies: the wind pressure is larger than the thickness (m) multiplied by 1kPa of the filler layer; the drainer comprises a water collecting funnel 10 and a drain pipe 11 communicated with the bottom of the water collecting funnel 10, wherein the drain pipe 11 is made of acid-base resistant materials, and the ratio of the pipe diameter to the drainage flow rate is kept at 0.5 m/s; the drain pipe 11 is communicated with a water storage device 12, and treated water obtained by degassing treatment is stored for later use by the water storage device 12.
Example 1
The method for degassing the biochemically treated coal chemical industry wastewater by using the degassing system comprises the following steps:
step one, detecting CO in the recycled water3 2-And HCO3 -The total content of (C) is 30mg/L (as CaCO)3Meter), NH4 +The TOC content is 1.66mg/L, a water inlet pump 1 and a one-way water valve 2 are opened, the reuse water enters a pH adjusting device 3, and the pH of the reuse water is adjusted to 4;
step two, the recycled water after pH adjustment enters a degassing tower, and is uniformly distributed in degassing filler 7 under the water distribution action of a spray nozzle, wherein the flow rate of the recycled water in the degassing tower is 0.005m/s, the thickness of the degassing filler 7 is 1.2m, and simultaneously, a fan 8 carries out stripping, and the gas-liquid ratio of stripping is 0.1m3And/kg, the flow rate of upward air flow is 10m/s, the recycled water flowing downwards in the degassing tower is enabled to act with the upward air flow to carry out degassing treatment by the recycled water, the gas removed by the degassing treatment is discharged from an air outlet after water mist is removed by the water mist collecting net 5, and the treated water obtained by the degassing treatment enters the water collecting funnel 10, is discharged through the water discharging pipe 11 and enters the water storage device 12.
Wherein the degassing tower is made of 316L stainless steel material with the specification of phi 300 multiplied by 2800 mm.
The water quality detection is carried out on the treated water obtained in the water storage device 12, and the detection result is as follows: CO 23 2-And HCO3 -The total content of (C) is 1.1mg/L (as CaCO)3Meter), NH4 +The content of (A) is 0.05mg/L, and the content of TOC is 0.2 mg/L.
Example 2
The method for degassing the biochemically treated coal chemical industry wastewater by using the degassing system comprises the following steps:
step one, detecting CO in the recycled water3 2-And HCO3 -The total content of (C) is 34mg/L (as CaCO)3Meter), NH4 +The content of the reclaimed water is 1.5mg/L, the TOC content is 2.58mg/L, a water inlet pump 1 and a one-way water valve 2 are opened, the reclaimed water enters a pH adjusting device 3, and the pH of the reclaimed water is adjusted to 4.5;
step two, the recycled water with the adjusted pH value enters a degassing tower and is uniformly distributed in a degassing filler 7 under the water distribution action of a spray nozzle, wherein the flow velocity of the recycled water in the degassing tower is 0.01m/s, the thickness of the degassing filler 7 is 1.3m, a fan 8 is used for stripping, and the gas-liquid ratio of stripping is 0.1m3And/kg, the flow rate of upward air flow is 20m/s, the recycled water flowing downwards in the degassing tower is enabled to act with the upward air flow to carry out degassing treatment by the recycled water, the gas removed by the degassing treatment is discharged from an air outlet after water mist is removed by the water mist collecting net 5, and the treated water obtained by the degassing treatment enters the water collecting funnel 10, is discharged through the water discharging pipe 11 and enters the water storage device 12.
Wherein the degassing tower is made of 316L stainless steel material with the specification of phi 300 multiplied by 2800 mm.
The water quality detection is carried out on the treated water obtained in the water storage device 12, and the detection result is as follows: CO 23 2-And HCO3 -The total content of (C) is 2mg/L (as CaCO)3Meter), NH4 +The content of (A) is 0.03mg/L, and the TOC content is 0.22 mg/L.
Example 3
The method for degassing the biochemically treated coal chemical industry wastewater by using the degassing system comprises the following steps:
step one, detecting CO in the recycled water3 2-And HCO3 -The total content of (C) is 33mg/L (as CaCO)3Meter) does not contain NH4 +When the TOC content is 1.97mg/L, the water inlet pump 1 and the one-way water valve 2 are opened, the reuse water enters the pH adjusting device 3, and the pH of the reuse water is adjusted to 5;
step two, the recycled water with the adjusted pH value enters a degassing tower and is uniformly distributed in a degassing filler 7 under the water distribution action of a spray nozzle, wherein the flow rate of the recycled water in the degassing tower is 0.015m/s, the thickness of the degassing filler 7 is 1.5m, a fan 8 is used for blowing, and the gas-liquid ratio of the blowing and the degassing is 0.3m3And/kg, the flow rate of upward air flow is 30m/s, the recycled water flowing downwards in the degassing tower is enabled to act with the upward air flow to carry out degassing treatment by the recycled water, the gas removed by the degassing treatment is discharged from an air outlet after water mist is removed by the water mist collecting net 5, and the treated water obtained by the degassing treatment enters the water collecting funnel 10, is discharged through the water discharging pipe 11 and enters the water storage device 12.
Wherein the degassing tower is made of 316L stainless steel material with the specification of phi 300 multiplied by 2800 mm.
The water quality detection is carried out on the treated water obtained in the water storage device 12, and the detection result is as follows: CO 23 2-And HCO3 -The total content of (C) is 1.7mg/L (as CaCO)3Calculated), the TOC content was 0.16 mg/L.
Example 4
The method for degassing the domestic sewage after biochemical treatment by using the degassing system comprises the following steps:
step one, detecting CO in the recycled water3 2-And HCO3 -The total content of (C) is 2mg/L (as CaCO)3Meter), NH4 +The content of the reclaimed water is 18mg/L, the TOC content is 1.52mg/L, a water inlet pump 1 and a one-way water valve 2 are opened, the reclaimed water enters a pH adjusting device 3, and the pH of the reclaimed water is adjusted to 10;
step two, the recycled water after pH adjustment enters a degassing tower and is uniformly distributed in degassing filler 7 under the water distribution action of a spray nozzle, wherein the flow velocity of the recycled water in the degassing tower is 0.005m/s, the thickness of the degassing filler 7 is 1.2m, and simultaneously, a fan 8 carries out stripping, and the gas-liquid ratio of stripping is 0.1m3And/kg, the flow rate of upward air flow is 10m/s, the recycled water flowing downwards in the degassing tower is enabled to act with the upward air flow to carry out degassing treatment by the recycled water, the gas removed by the degassing treatment is discharged from an air outlet after water mist is removed by the water mist collecting net 5, and the treated water obtained by the degassing treatment enters the water collecting funnel 10, is discharged through the water discharging pipe 11 and enters the water storage device 12.
Wherein the degassing tower is made of 316L stainless steel material with the specification of phi 300 multiplied by 2800 mm.
The water quality detection is carried out on the treated water obtained in the water storage device 12, and the detection result is as follows: CO 23 2-And HCO3 -The total content of (C) is 0.3mg/L (as CaCO)3Meter), NH4 +The content of (A) is 2mg/L, and the TOC content is 0.3 mg/L.
Example 5
The method for degassing the domestic sewage after biochemical treatment by using the degassing system comprises the following steps:
step one, detecting CO in the recycled water3 2-And HCO3 -The total content of (C) is 1.2mg/L (as CaCO)3Meter), NH4 +The total content of the recycled water is 21mg/L, the TOC content is 1.60mg/L, a water inlet pump 1 and a one-way water valve 2 are opened, the recycled water enters a pH adjusting device 3, and the pH of the recycled water is adjusted to 10.5;
step two, the recycled water with the adjusted pH value enters a degassing tower and is uniformly distributed in a degassing filler 7 under the water distribution action of a spray nozzle, wherein the flow velocity of the recycled water in the degassing tower is 0.01m/s, the thickness of the degassing filler 7 is 1.3m, a fan 8 is used for stripping, and the gas-liquid ratio of stripping is 0.1m3And/kg, the flow rate of upward air flow is 20m/s, the recycled water flowing downwards in the degassing tower is enabled to act with the upward air flow to carry out degassing treatment by the recycled water, the gas removed by the degassing treatment is discharged from an air outlet after water mist is removed by the water mist collecting net 5, and the treated water obtained by the degassing treatment enters the water collecting funnel 10, is discharged through the water discharging pipe 11 and enters the water storage device 12.
Wherein the degassing tower is made of 316L stainless steel material with the specification of phi 300 multiplied by 2800 mm.
The water quality detection is carried out on the treated water obtained in the water storage device 12, and the detection result is as follows: CO 23 2-And HCO3 -The total content of (C) is 0.13mg/L (as CaCO)3Meter), NH4 +The TOC content of (A) is 2.2mg/L and the TOC content is 0.33 mg/L.
Example 6
The method for degassing the domestic sewage after biochemical treatment by using the degassing system comprises the following steps:
step one, detecting that the recycled water does not contain CO3 2-And HCO3 -，NH4 +The content of the reclaimed water is 15mg/L, the TOC content is 1.44mg/L, a water inlet pump 1 and a one-way water valve 2 are opened, the reclaimed water enters a pH adjusting device 3, and the pH of the reclaimed water is adjusted to 11;
step two, the recycled water with the adjusted pH value enters a degassing tower and is uniformly distributed in a degassing filler 7 under the water distribution action of a spray nozzle, wherein the flow rate of the recycled water in the degassing tower is 0.015m/s, the thickness of the degassing filler 7 is 1.5m, a fan 8 is used for blowing, and the gas-liquid ratio of the blowing and the degassing is 0.3m3/kg, the upward gas flow rate is 30m/s, the recycle water flowing downward into the degassing tower is reacted with the upward gas flow to perform degassing treatment with the recycle water, and the gas removed by the degassing treatment isThe body is discharged from the air outlet after the water mist is removed by the water mist collecting net 5, and the treated water obtained by degassing treatment enters the water collecting funnel 10, is discharged through the water discharging pipe 11 and enters the water storage device 12.
Wherein the degassing tower is made of 316L stainless steel material with the specification of phi 300 multiplied by 2800 mm.
The water quality detection is carried out on the treated water obtained in the water storage device 12, and the detection result is as follows: NH (NH)4 +The content of (A) was 2.6mg/L and the TOC content was 0.37 mg/L.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, omissions, substitutions, equivalents, or improvements made within the spirit and scope of the present invention should be considered as being included therein.

Claims (9)

1. A method for degassing reuse water is characterized in that: at least comprises the following steps:
step one, adjusting the pH value of the reuse water, if the reuse water contains HCO3 -And CO3 2-Total molar content of more than or equal to NH4 +The pH value of the reuse water is adjusted to 4-5 according to the molar content of the water; if NH in the reclaimed water4 +Molar content of > HCO3 -And CO3 2-Adjusting the pH of the reuse water to 10-11;
step two, the recycled water with the adjusted pH value enters a degassing tower, and the gas-liquid ratio in the degassing tower is set to be 0.1-0.3m3The flow velocity of upward gas flow is 10-30m/s, so that the reuse water flowing downwards in the degassing tower acts with the upward gas flow to carry out degassing treatment on the reuse water, and treated water is obtained;
the degassing system for the reuse water degassing method comprises a water inlet device, a pH adjusting device and a degassing tower which are sequentially communicated;
the top of the degassing tower is provided with an exhaust port, the bottom of the degassing tower is provided with a drainer, and a water distributor, a degassing filler and an air guide mechanism for controlling the wind direction to be upward are sequentially arranged in the tower from top to bottom; the water distributor is communicated with the pH adjusting device.
2. A method of degassing reuse water as claimed in claim 1, wherein: the flow rate of the recycled water in the degassing tower is 0.005-0.015 m/s.
3. A method of degassing reuse water as claimed in claim 1, wherein: the water inlet device comprises a water inlet pump and a one-way water valve.
4. A method of degassing reuse water as claimed in claim 1, wherein: and a water mist collecting net is arranged between the exhaust port and the water distributor.
5. A method of degassing reuse water as claimed in claim 1, wherein: the water distributor is a spray nozzle or a fishbone-shaped wire winding pipe bundle which is uniformly provided with a plurality of spray holes.
6. A method of degassing reuse water as claimed in claim 1, wherein: the degassing filler is a polypropylene hollow sphere with the particle size of 20-25 mm; and/or:
the thickness of the degassing filler is 1.2-1.5 m.
7. A method of degassing reuse water as claimed in claim 1, wherein: the air guide mechanism comprises a fan and an air guide plate which is obliquely arranged, the high end of the air guide plate is fixed on the inner wall of the degassing tower, the horizontal position of the low end of the air guide plate is positioned below the air outlet of the fan, and a gap for treated water to fall down is formed between the air guide mechanism and the tower wall of the degassing tower.
8. A method of degassing reuse water as claimed in claim 7, wherein: the width of the air deflector is 1/3-1/2 of the diameter of the degassing tower.
9. A method of degassing reuse water as claimed in claim 1, wherein: the drainer comprises a water collecting funnel and a drain pipe communicated with the bottom of the water collecting funnel.
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