CN214192699U

CN214192699U - MPUV/H for removing micro-pollutants from drinking water2O2Advanced oxidation system

Info

Publication number: CN214192699U
Application number: CN202022765557.8U
Authority: CN
Inventors: 张柯柯; 蔡晓涌; 张会敏; 钟静; 罗锺兵
Original assignee: Beijing Onyx Environmental Technology Co ltd
Current assignee: Beijing Onyx Environmental Technology Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-09-14
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a MPUV/H that is used for drinking water micro pollutant to get rid of₂O₂The advanced oxidation system comprises a flow pipeline, a pipeline mixer, an ultraviolet reactor and a hydrogen (H)₂O₂Feeding pipeline, H₂O₂The storage tank and the ballast central control integrated cabinet are provided with a water inlet at one end and a water outlet at the other end of a circulation pipeline, a pipeline mixer and an ultraviolet reactor are communicated to the middle of the circulation pipeline in sequence, a mixing port is formed in the side wall of the pipeline mixer, and H is a gas-liquid separator₂O₂One end of the feeding pipeline and the mixerThe other end is communicated with H₂O₂The storage tanks are communicated with each other H₂O₂The dosing pipeline is communicated with and provided with a metering pump, the ultraviolet reactor is a medium-pressure ultraviolet tubular reactor, and the ballast central control integrated cabinet is in control connection with the ultraviolet reactor and the metering pump. The beneficial effects of the utility model reside in that high-efficient, the treatment effect is good, no secondary pollution, and the whole area of system is little, system closed-loop control, and the operation is maintained conveniently.

Description

MPUV/H for removing micro-pollutants from drinking water2O2Advanced oxidation system

Technical Field

The utility model relates to a water treatment facilities technical field, concretely relates to MPUV/H that is used for drinking water micro pollutant to get rid of₂O₂Advanced oxidation systems.

Background

With the improvement of living standard, people pay more and more attention to the safety problem of drinking water, and the improvement of the quality of the drinking water and the control of micro-pollutants become hot spots of research in the field of drinking water. Odorous substances, such as GSM and 2-MIB, are common micropollutants that cause problems of bad smell in drinking water, they not only seriously degrade the quality of drinking water from an organoleptic aspect, but also have a very low odor threshold, the special structure of t-butanol, making it difficult to treat them below the human olfactory threshold with conventional processes.

UV/H₂O₂The advanced oxidation technology is used as a green treatment process, has no sludge generation, no byproduct generation such as bromate and the like in the reaction process, and is gradually applied to drinking water treatment. The process is excited by medium-pressure ultraviolet rays, the hydrogen peroxide can be decomposed to generate hydroxyl radicals (OH) with strong oxidizing property, and the OH is used as a strong oxide substance and is nonselective to attack of organic and inorganic compounds, and most reactions of the OH are close to the limit of diffusion control. The reaction rate constant of OH with organic compounds ranges from 10⁶～10¹⁰M^-1s^-1In the meantime. The reaction of OH and compounds comprises dehydrogenation reaction, electrophilic addition reaction and electron transfer reaction, and can effectively remove micropollutants and improve the quality of drinking water.

At present, UV/H₂O₂The advanced oxidation process mostly adopts Low Pressure UV (LPUV). According to the first law of photochemistry (only photons absorbed by a molecule can be induced in a systemChemical reaction) of H, which is an initiator of the OH oxidation reaction₂O₂The greater the proportion of light absorbed, the higher the yield of OH. Roberta et al teach that LPUV lamps emit UV light at 254nm, while H₂O₂The absorption is not strong at 200-300 nm. Thus, UV/H₂O₂The process has poor UV catalytic effect and H₂O₂Serious residue and the like, greatly influences the degradation effect of pollutants and limits the further popularization and application of the process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a MPUV (medium pressure ultraviolet)/H for drinking water micro-pollutant removal₂O₂The advanced oxidation system can be used for removing micro pollutants in the field of water purification, such as odor substances, organic pollutants and the like.

The utility model discloses a reach above-mentioned purpose, specifically can realize through following technical scheme:

MPUV/H for removing micro-pollutants from drinking water₂O₂The advanced oxidation system comprises a flow pipeline, a pipeline mixer, an ultraviolet reactor and a hydrogen (H)₂O₂Feeding pipeline, H₂O₂The storage tank and the ballast central control integrated cabinet are provided with a water inlet at one end and a water outlet at the other end of a circulation pipeline, a pipeline mixer and an ultraviolet reactor are communicated to the middle of the circulation pipeline in sequence, a mixing port is formed in the side wall of the pipeline mixer, and H is a gas-liquid separator₂O₂One end of the feeding pipeline is communicated with the mixing port, and the other end of the feeding pipeline is communicated with the H₂O₂The storage tanks are communicated with each other H₂O₂The dosing pipeline is communicated with and provided with a metering pump, the ultraviolet reactor is a medium-pressure ultraviolet tubular reactor, and the ballast central control integrated cabinet is in control connection with the ultraviolet reactor and the metering pump.

Further, the water outlet end of the circulation pipeline is provided with H₂O₂Detection Module H₂O₂The detection module is connected with the ballast central control integrated cabinet.

Furthermore, a first butterfly valve and a first elastic joint are communicated and installed on a flow pipeline between the pipeline mixer and the ultraviolet reactor.

Furthermore, a second butterfly valve and a second elastic joint are communicated and installed on a circulating pipeline between the ultraviolet reactor and the water outlet.

Further, the ultraviolet reactor comprises a reactor body and 1-16 ultraviolet lamps, wherein the two ends of the reactor body along the water flow direction are open, and the ultraviolet lamps are arranged inside the reactor body and are perpendicular to the water flow direction.

Furthermore, the power of the single ultraviolet lamp tube is 1kw-12 kw.

Further, H₂O₂And the feeding pipeline is also provided with a flowmeter, a check valve and a filter.

Further, the filter is a Y-shaped filter, and the filter is arranged between the metering pump and the H₂O₂H between storage tanks₂O₂And a feeding pipeline.

Further, the filter is connected with H₂O₂H between storage tanks₂O₂The feeding pipeline is also provided with an electromagnetic valve and a ball valve.

Further, H₂O₂The storage tank is provided with a liquid level meter H₂O₂A manhole, a feed inlet, a discharge outlet and an overflow port are formed in the tank body of the storage tank, and an exhaust valve is formed in the top of the tank body.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) high efficiency: compared with the low-pressure ultraviolet lamp with short wave spectrum, the medium-pressure ultraviolet lamp can generate wide wave spectrum ultraviolet rays within the range of 180nm-480nm and is easier to be absorbed by H₂O₂Absorb and generate strong oxidizing OH free radicals, and the processing load is higher under the same power consumption condition.

(2) Good treatment effect and no secondary pollution: OH has strong oxidizability, small selectivity and large reaction rate constant, and the rate constant of reaction with most organic substances is 10⁶～10¹⁰L/(mol · s), can oxidize micropollutants into small molecular substances or directly degrade the micropollutants into CO₂And H₂And O, the treatment effect on the micro-pollutants is good. MPUV/H₂O₂Is a green treatment process, and no sludge is generated and generated in the reaction processBy-products such as bromate and the like are generated, and secondary pollution is not generated.

(3) The occupied area is small: the medium-pressure ultraviolet reactor adopts a pipeline closed device, is compactly designed in full-pipe flow, and has the advantages of environmental pollution avoidance, small floor area, flexible arrangement and installation and the like; the Onyx medium-pressure UV advanced oxidation reactor adopts an ultraviolet medium-pressure lamp with higher power and wider spectrum than a low-pressure lamp, the output power of a single lamp is high, the number of lamp tubes is reduced by 50-90% compared with a low-pressure system under the condition of the same output power, and the occupied area is small.

(4) The system is controlled in a closed loop mode, and the operation and maintenance are convenient: MPUV/H₂O₂The process is full-automatic operation, adopts the cloud control of the Internet of things, does not need to adjust acid and alkali, has few auxiliary equipment, can monitor operation related parameters (ultraviolet intensity, hydrogen peroxide adding concentration, treatment flow, temperature and the like) in real time in the operation process and adjust the UV dosage and H on line₂O₂Adding concentration; meanwhile, the medium-pressure ultraviolet catalytic reactor has an online automatic cleaning function, can realize complete automatic control and unattended operation, and is convenient to operate and maintain.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure, 1, a flow line; 11. a water inlet; 12. a water outlet; 13. h₂O₂A detection module; 14. A first butterfly valve; 15. a first elastic joint; 16. a second butterfly valve; 17. a second elastic joint; 2. a pipeline mixer; 21. a mixing port; 3. an ultraviolet reactor; 31. a reactor body; 4. h₂O₂A feeding pipeline; 41. a metering pump; 42. a flow meter; 43. a check valve; 44. a filter; 45. an electromagnetic valve; 46. a ball valve; 5. h₂O₂A storage tank; 51. and (4) exhausting the valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in figure 1, the utility model discloses an MPUV/H for drinking water micro-pollutant gets rid of₂O₂The advanced oxidation system comprises a flow pipeline 1, a pipeline mixer 2,UV reactor 3, H₂O₂Feeding pipeline 4, H₂O₂A storage tank 5 and a ballast central control integrated cabinet, wherein one end of a circulation pipeline 1 is provided with a water inlet 11, the other end of the circulation pipeline is provided with a water outlet 12, a pipeline mixer 2 and an ultraviolet reactor 3 are communicated to the middle part of the circulation pipeline 1 in sequence, the side wall of the pipeline mixer 2 is provided with a mixing port 21, and H is arranged on the side wall of the pipeline mixer₂O₂One end of the feeding pipeline 4 is communicated with the mixing port 21, and the other end is communicated with H₂O₂The storage tanks 5 are communicated with each other H₂O₂The dosing pipeline 4 is internally communicated with a metering pump 41, the ultraviolet reactor 3 is a medium-pressure ultraviolet tubular reactor, and a ballast central control integrated cabinet is in control connection with the ultraviolet reactor 3 and the metering pump 41.

UV/H₂O₂The process is used as a homogeneous advanced oxidation technology, has obvious effect of degrading organic and inorganic pollutants in water treatment, and MPUV/H₂O₂The reaction mechanism is as follows:

H₂O₂+hv→2·OH

·OH+H₂O₂→HO₂+H₂O

·OH+HO₂→H₂O+O₂

·OH+·OH→2H₂O₂

when the photon absorption energy is more than or equal to H₂O₂In the energy required for breaking the O-O bond, H₂O₂The molecule reaches an activated state and rapidly evolves into two OH's in the solvent (water). The rapid recombination rate of OH in the solvent is similar to the diffusion rate, so that only half of OH generated in the solvent escapes and participates in the chemical reaction in water. During the whole reaction process, H₂O₂When consuming OH, H₂O₂When the concentration of (A) is high, generation of radicals is inhibited. However, sufficient amount of H₂O₂Is a necessary condition for accelerating the generation of OH by absorbing ultraviolet rays. Thus, H₂O₂The concentration of (A) has the best value and needs to be determined through experiments.

The medium-pressure ultraviolet (MPUV) can emit ultraviolet light with the wavelength of 180-400nm, and the wavelength range is wider, compared with LPUV, H₂O₂The absorption efficiency of (2) is higher. Thus, MPUV/H is used₂O₂Process for promoting H₂O₂Is excited to generate more OH, and achieves better degradation effect on the micro-pollutants.

Preferably, the end of the water outlet 12 of the circulation pipeline 1 is provided with H₂O₂Detection Module 13, H₂O₂The detection module 13 is connected with the ballast central control integrated cabinet. H₂O₂The detection module 13 is composed of a flow monitoring and concentration monitoring system. The main control system grasps the concentration of residual hydrogen peroxide in water through the metering pump 41 and the H₂O₂The detection module 13 realizes the accurate adding of hydrogen peroxide and avoids residual H₂O₂The interference to the effluent COD.

Preferably, a first butterfly valve 14 and a first elastic joint 15 are installed on the flow line 1 between the line mixer 2 and the ultraviolet reactor 3 in a communication manner. A second butterfly valve 16 and a second elastic joint 17 are communicated and installed on the flow pipeline 1 between the ultraviolet reactor 3 and the water outlet 12.

Preferably, the ultraviolet reactor 3 comprises a reactor body 31 and 1-16 (1-12kw) ultraviolet lamps, preferably with a power of 1kw-12 kw. The reactor body 31 is open at both ends in the water flow direction, and the ultraviolet lamp tube is installed inside the reactor body 31 and perpendicular to the water flow direction. The ballast central control integrated cabinet (comprising the ballast and the central control system), the ultraviolet intensity monitoring system, the automatic cleaning system, the cleaning driving system and the like can realize the UV photocatalysis function.

The reactor body 31 adopts 304/316/316L stainless steel cavity, so that water flow can effectively pass through the ultraviolet lamp tube and is irradiated by more uniform ultraviolet rays. The ultraviolet lamp tube is placed in a quartz sleeve, the lamp holder is fixed by a ceramic lamp holder, two ends of the sleeve are packaged on top plates at two ends of the medium-pressure lamp by sealing equipment, and a protective cover is arranged at a wire outlet end. Each reactor contains 1-16 ultraviolet lamps (1-12kw), and the ultraviolet dose can be controlled by controlling the on-off of the ultraviolet lamps according to different flow rates.

The ultraviolet reactor 3 adopts an automatic cleaning system, and is more convenient and quicker to maintain. The top end of the reactor can be provided with a liquid level controller, a temperature controller, an ultraviolet intensity probe, an exhaust valve and the like, so that the running state of the ultraviolet photocatalytic reactor can be monitored in real time, and the high-efficiency running of the system can be guaranteed.

Further, H₂O₂The dosing line 4 is also provided with a flow meter 42, a non-return valve 43 and a filter 44. Further preferably, the filter 44 is a Y-type filter, and the filter 44 is installed between the metering pump 41 and the H₂O₂H between tanks 5₂O₂And a feeding pipeline 4. Further, a filter 44 is provided with H₂O₂H between tanks 5₂O₂The feeding pipeline 4 is also provided with an electromagnetic valve 45 and a ball valve 46. H₂O₂The feeding pipeline 4 adopts a high-performance and corrosion-resistant diaphragm metering pump 41 and is coupled with a pulse damper, and the feeding amount is controlled by a ball valve 46 and a flow meter 42, so that H is ensured₂O₂And (4) accurately adding. H₂O₂After being fed into the system, the mixture is mixed by a pipeline mixer 2 to ensure H₂O₂Can be uniformly dispersed in water body, and improve MPUV to H₂O₂The catalytic effect of the method ensures that the effluent reaches the standard.

Preferably, H₂O₂The storage tank 5 is provided with a liquid level meter H₂O₂The tank body of the storage tank 5 is provided with a manhole, a feed inlet, a discharge outlet and an overflow port, and the top of the tank body is provided with an exhaust valve 51. H₂O₂The storage tank 5 is made of corrosive material and stores hydrogen peroxide (with 27.5% concentration H)₂O₂Medicament accounting) to meet MPUV/H₂O₂The advanced oxidation system is required to operate for 7-15 days. H₂O₂Storage tank 5 has alkali-resistant, anti oxidation corrosion's characteristic, and the jar body has the trompil: a manhole, a feed inlet, a discharge outlet, an overflow port and a vent; each storage tank is matched with an independent hydrogen peroxide storage tank liquid level meter, the liquid level in the reaction tank body is visualized, the high-low level alarm of the hydrogen peroxide storage amount in the storage tank can be carried out, and the dosing measures can be conveniently and timely taken; the top of the tank body is provided with an exhaust valve, so that the safety of the storage tank is improved.

The process flow of the advanced oxidation system of the utility model

(1)MPUV/H₂O₂High grade oxygenA chemical treatment process:

drinking water enters MPUV/H through the water inlet 11 after front-end treatment₂O₂Advanced oxidation system, and with H₂O₂The mixture is uniformly mixed by the pipeline mixer 2, enters the ultraviolet reactor 3 after passing through the first butterfly valve 14 and the first elastic joint 15, and the ultraviolet reactor 3 emits high-intensity and high-energy ultraviolet rays to mix H in water₂O₂The OH generated by excitation reacts with the micropollutants in the water to degrade the micropollutants into small molecular substances or directly mineralize the small molecular substances into CO₂And H₂And O, achieving the purpose of removing the micro-pollutants in the drinking water. Meanwhile, a sampling port is arranged at the water outlet 12, and the system carries out residual H in real time₂O₂Monitoring concentration, and adjusting H according to monitoring result and water outlet effect₂O₂And (4) adding amount to realize closed-loop control.

(2)H₂O₂Feeding process flow

H₂O₂H in the storage tank 5₂O₂Enters the pipeline mixer 2 through a metering pump 41, and the dosage is controlled through a solenoid valve 45, a ball valve 46 and a flow meter 42, so that H is ensured₂O₂And (4) accurately adding. At the same time, a filter 44 is provided on the pipeline to remove H₂O₂Middle residual impurities and check valve 43 to prevent H₂O₂The water in the feeding pipeline 4 flows back to the H₂O₂A storage tank 5.

The invention provides MPUV/H for removing micropollutants in drinking water₂O₂Advanced oxidation systems, for micro-pollutants in drinking water such as: GSM (bromine earth), 2-MIB (dimethyl iso-alcohol), linear aliphatic hydrocarbon, Polycyclic Aromatic Hydrocarbon (PAH), polychlorinated biphenyl (PCB), organic pesticide, etc., and can be mineralized into CO₂And H₂O or degraded into small molecular substances.

Example 1: in a certain water purification plant in Shandong Weifang City, the amount of organic micropollutants in inlet water is large, the concentration of bromide ions is high, the conventional treatment processes such as air floatation, sand filtration and the like are adopted at the front end, and MPUV/H is supposed to be adopted for advanced treatment₂O₂Advanced oxidation technology.

This example is a pilot plant testTest platform, treated water amount 5m³The water enters the utility model after being processed by the front end for treating target pollutants GSM (300ng/L) and MIB (300ng/L)₂O₂Advanced oxidation system and H added through pipeline mixer₂O₂Fully mixed and then enters an ultraviolet reactor, H₂O₂OH with strong oxidizing property is generated by ultraviolet excitation, and the OH reacts with target pollutants to degrade GSM and MIB into CO₂And H₂O or small molecular substances, and the effluent GSM and MIB are both less than 10ng/L, thereby meeting the effluent requirements of sanitary standards for drinking water on GSM and MIB smelly substances.

Example 2: processing scale of 40000m in certain water purification plant³D, the front end adopts the processes of sand filtration, membrane treatment and the like, and the advanced treatment adopts the utility model discloses a MPUV/H₂O₂The advanced oxidation process mainly removes organic micropollutants MIB and GSM which cause odor in water. The present example configures a UV dose of 350mJ/cm²，H₂O₂The designed adding concentration is 40ppm, and the effluent meets the effluent requirement of sanitary Standard for Drinking Water on GSM and MIB (both less than 10ng/L) smelly substances.

The specific embodiments of the present invention are only for explaining the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications to the present embodiment as required without inventive contribution after reading the present specification, but all the embodiments are protected by patent laws within the scope of the claims of the present invention.

Claims

1. MPUV/H for removing micro-pollutants from drinking water₂O₂The advanced oxidation system is characterized by comprising a circulation pipeline (1), a pipeline mixer (2), an ultraviolet reactor (3) and H₂O₂Feeding pipeline (4) and H₂O₂Storage tank (5) and ballast center control integrated cabinet, wherein one end of a circulation pipeline is provided with a water inlet (11), the other end of the circulation pipeline is provided with a water outlet (12), a pipeline mixer and an ultraviolet reactor are communicated to the middle of the circulation pipeline in sequence, the side wall of the pipeline mixer is provided with a mixing port (21), and H is₂O₂One end of the feeding pipeline is communicated with the mixing port, and the other end of the feeding pipeline is communicated with the H₂O₂The storage tanks are communicated with each other H₂O₂A metering pump (41) is communicated and installed in the feeding pipeline, the ultraviolet reactor is a medium-pressure ultraviolet tubular reactor, and a ballast central control integrated cabinet is in control connection with the ultraviolet reactor and the metering pump.

2. MPUV/H for drinking water micropollutant removal according to claim 1₂O₂The advanced oxidation system is characterized in that the water outlet end of the circulating pipeline is provided with H₂O₂Detection Module (13), H₂O₂The detection module is connected with the ballast central control integrated cabinet.

3. MPUV/H for drinking water micropollutant removal according to claim 1₂O₂The advanced oxidation system is characterized in that a first butterfly valve (14) and a first elastic joint (15) are communicated and installed on a circulating pipeline between the pipeline mixer and the ultraviolet reactor.

4. MPUV/H for drinking water micropollutant removal according to claim 1₂O₂The advanced oxidation system is characterized in that a second butterfly valve (16) and a second elastic joint (17) are communicated and installed on a circulating pipeline between the ultraviolet reactor and the water outlet.

5. MPUV/H for drinking water micropollutant removal according to claim 1₂O₂The advanced oxidation system is characterized in that the ultraviolet reactor comprises a reactor body (31) and 1-16 ultraviolet lamp tubes, wherein the two ends of the reactor body along the water flow direction are open, and the ultraviolet lamp tubes are arranged inside the reactor body and are perpendicular to the water flow direction.

6. MPUV/H for drinking water micropollutant removal according to claim 5₂O₂The advanced oxidation system is characterized in that the power of a single ultraviolet lamp tube is 1kw-12 kw.

7. MPUV/H for drinking water micropollutant removal according to claim 1₂O₂Advanced oxidation system, characterized in that H₂O₂The feeding pipeline is also provided with a flowmeter (42), a check valve (43) and a filter (44).

8. MPUV/H for drinking water micropollutant removal according to claim 7₂O₂The advanced oxidation system is characterized in that the filter is a Y-shaped filter, and the filter is arranged between the metering pump and the H₂O₂H between storage tanks₂O₂And a feeding pipeline.

9. MPUV/H for drinking water micropollutant removal according to claim 7₂O₂Advanced oxidation system, characterized by a filter and H₂O₂H between storage tanks₂O₂An electromagnetic valve (45) and a ball valve (46) are also arranged on the feeding pipeline.

10. MPUV/H for drinking water micropollutant removal according to claim 1₂O₂Advanced oxidation system, characterized in that H₂O₂The storage tank is provided with a liquid level meter H₂O₂A manhole, a feed inlet, a discharge outlet and an overflow port are arranged on the tank body of the storage tank, and an exhaust valve (51) is arranged at the top of the tank body.