CN113716756B - Non-load type ozone catalytic oxidation sewage treatment system and method - Google Patents

Non-load type ozone catalytic oxidation sewage treatment system and method Download PDF

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Publication number
CN113716756B
CN113716756B CN202111099017.3A CN202111099017A CN113716756B CN 113716756 B CN113716756 B CN 113716756B CN 202111099017 A CN202111099017 A CN 202111099017A CN 113716756 B CN113716756 B CN 113716756B
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water
unit
communicated
water outlet
catalytic oxidation
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CN113716756A (en
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赵宁华
章建科
陈辉洋
曾敏福
刘建环
贾志宇
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SHANGHAI ZHONGYAO ENVIRONMENTAL PROTECTION INDUSTRIAL CO LTD
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SHANGHAI ZHONGYAO ENVIRONMENTAL PROTECTION INDUSTRIAL 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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
    • B01D53/8675—Ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/106—Ozone
    • 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
    • C02F1/20—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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • 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
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/78—Details relating to ozone treatment devices
    • C02F2201/782—Ozone generators
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/78—Details relating to ozone treatment devices
    • C02F2201/784—Diffusers or nozzles for ozonation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/23—O3
    • 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
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical

Abstract

The invention relates to the technical field of sewage treatment, in particular to a system and a method for treating sewage through catalytic oxidation by using non-supported ozone. The system is simple, is convenient to use, and can be used for ozone catalytic oxidation advanced treatment of various sewage.

Description

Non-load type ozone catalytic oxidation sewage treatment system and method
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a system and a method for treating sewage by non-load type catalytic ozonation.
Background
With the increasing strictness of the national environmental protection policy, the sewage discharge standard is increasingly strict. The upgrading and transformation of sewage plants and the near-zero and zero discharge of industrial wastewater become the development trend of the sewage treatment industry. The removal of the refractory organic matters is a main problem in the upgrading and transformation of sewage plants, near-zero and zero discharge of industrial wastewater and the like.
At present, the most common, economical and efficient method for removing the refractory organic matters in the sewage is mainly an advanced oxidation method. The advanced oxidation method is a method for removing refractory organic matters in sewage by utilizing the strong oxidation action of hydroxyl radicals, the hydroxyl radicals have no selectivity and can almost oxidize all organic pollutants, and the Fenton oxidation method and the ozone catalytic oxidation method are commonly used.
The Fenton oxidation method is to oxidize Fe by hydrogen peroxide2+Generate hydroxyl free radical under the catalysis of the catalyst, and further oxidize most organic matters. The Fenton oxidation method usually carries out reaction under an acidic condition, and substances such as hydrogen peroxide, sulfuric acid, ferrous sulfate, sodium hydroxide and the like are added, so that the method is a common method for removing refractory organic matters. The Fenton oxidation method introduces sulfate radicals, sodium ions and other ions while removing most organic matters, which is unfavorable for desalting sewage, and also generates a large amount of iron mud, thereby increasing the treatment cost of the sludge. The catalytic ozonation method is a method for generating hydroxyl radicals by using ozone under the action of a catalyst, and is classified into a homogeneous catalytic ozonation method and a heterogeneous catalytic ozonation method. The heterogeneous ozone catalytic oxidation method adopts a solid catalyst, and has the advantages of good organic pollutant removing effect, no introduction of ions, ozone elimination of ozone from the ozone tail gas through a tail gas destruction device, secondary pollution avoidance and the like.
Chinese invention patent (CN2020104274580) introduces a preparation method of a composite metal oxide ozone catalyst. The method comprises the steps of mixing gamma-Al2O3Acid leaching, drying and activating the mixture to be used as a carrier, then dipping cerium nitrate and cobalt nitrate solution, and obtaining the composite metal oxide ozone after dipping, drying and calciningCatalyst CoO-CeO/gamma-Al2O3. The method is similar to the preparation method of most ozone catalysts used in the market at present, and the ozone catalyst is obtained by an impregnation loading method. However, in the using process of the ozone catalyst prepared by the method, the active components are easily influenced by the quality of the incoming water to fall off on one hand, and on the other hand, the catalyst is collided and falls off due to the procedures of air washing, backwashing and the like, so that the catalyst loses the catalytic activity, the service life of the catalyst is short, and the catalyst is easily poisoned; the preparation procedure of the ozone catalyst is relatively complex, the problem of uneven load exists in large-scale preparation, and the preparation cost of the catalyst is high.
Disclosure of Invention
The invention aims to provide a non-load type ozone catalytic oxidation sewage treatment system and a method thereof, which are used for solving the problems, have simple system and convenient use and can be used for the ozone catalytic oxidation advanced treatment of various sewage.
In order to achieve the purpose, the invention provides the following scheme:
a non-load type ozone catalytic oxidation sewage treatment system comprises a water inlet unit, wherein the water inlet unit is communicated with the bottom of a non-load type ozone catalytic oxidation unit, the top of the non-load type ozone catalytic oxidation unit is communicated with a tail gas treatment unit, the upper part of the side wall of the non-load type ozone catalytic oxidation unit is communicated with a water outlet unit, the top of the water outlet unit is communicated with the tail gas treatment unit, the side wall of the non-load type ozone catalytic oxidation unit is communicated with a water outlet circulation unit, the inlet end of the water outlet circulation unit is communicated with the upper part of the side wall of the non-load type ozone catalytic oxidation unit, the outlet end of the water outlet circulation unit is communicated with the lower part of the side wall of the non-load type ozone catalytic oxidation unit, the communication position of the water outlet unit and the non-load type ozone catalytic oxidation unit is higher than the inlet end of the water outlet circulation unit.
Preferably, the non-supported ozone catalytic oxidation unit comprises a water and gas distribution area, a catalyst area, a water outlet area and a tail gas area which are sequentially arranged from bottom to top.
Preferably, the side wall of the water and gas distribution area is communicated with one end of a water and gas distribution pipe, the water and gas distribution pipe is communicated with the outlet end of the water outlet circulation unit, the water and gas distribution pipe is communicated with a plurality of synergistic nozzles, and the synergistic nozzles are communicated with the water and gas distribution pipe through branch pipes.
Preferably, a support plate is arranged between the catalyst area and the water and gas distribution area, a plurality of water caps are mounted on the support plate, a bearing layer is placed above the support plate, a non-load type ozone catalyst is filled in the catalyst area, and the non-load type ozone catalyst is located above the bearing layer.
Preferably, the side wall of the water outlet area is communicated with a circulating water main pipe, the circulating water main pipe is communicated with a plurality of circulating water branch pipes, a plurality of water outlet holes are formed in the circulating water branch pipes, the openings of the water outlet holes are upward, the circulating water main pipe is communicated with the inlet end of the water outlet circulating unit through a circulating water port, the side wall of the water outlet area is communicated with the water outlet unit through a water outlet, and the circulating water port is located below the water outlet.
Preferably, the top of the tail gas area is communicated with one end of a first tail gas collecting valve, and the other end of the first tail gas collecting valve is communicated with the tail gas processing unit through a first tail gas collecting pipe.
Preferably, the water outlet circulation unit comprises a circulating water pump with an inlet end communicated with the circulating water port through a circulating water pump inlet pipe, the outlet end of the circulating water pump is communicated with one end of a circulating water pump outlet pipe, the other end of the circulating water pump outlet pipe is communicated with the water distribution and gas distribution pipe, a water ejector is arranged on the circulating water pump outlet pipe, one end of an ozone inlet pipe is communicated with the water ejector, and the other end of the ozone inlet pipe is communicated with an ozone generator.
Preferably, the water outlet unit comprises a closed water outlet contact tank, the water outlet contact tank is communicated with the water outlet through one end of a water outlet pipe, the other end of the water outlet pipe is communicated with the bottom of the side wall of the water outlet contact tank, a plurality of galleries are arranged in the water outlet contact tank, the upper portion of the side wall of the water outlet contact tank is communicated with a system water outlet pipe, the system water outlet pipe is lower than the liquid level of the water outlet contact tank, the system water outlet pipe is located on one side opposite to the water outlet pipe, the top of the water outlet contact tank is communicated with one end of at least one second tail gas collecting valve, and the other end of the second tail gas collecting valve is communicated with the tail gas treatment unit through a second tail gas collecting pipe.
Preferably, the water inlet unit comprises a water inlet tank, the bottom of the side wall of the water inlet tank is communicated with a water inlet end of the water inlet pump through a water inlet pipe of the water inlet pump, a water outlet end of the water inlet pump is communicated with an inlet end of the filtering unit through a water outlet pipe of the water inlet pump, and an outlet end of the filtering unit is communicated with the bottom of the water and air distribution area through a water outlet pipe of the filtering unit.
A method for treating sewage by non-load type ozone catalytic oxidation adopts the sewage treatment system of the technical scheme;
the sewage is sent to the bottom of a non-load type ozone catalytic oxidation unit through a water inlet unit, the non-load type ozone catalytic oxidation unit inputs ozone through a water outlet circulation unit, and an ozone catalytic oxidation reaction is generated in the non-load type ozone catalytic oxidation unit;
and the reacted water is sent to the water outlet unit, residual gas in the water is sent to the tail gas treatment unit, and the waste gas after the reaction of the non-load type ozone catalytic oxidation unit is sent to the tail gas treatment unit and is subjected to ozonolysis to reach the standard and be discharged.
The invention has the following technical effects:
(1) according to the non-supported ozone catalytic oxidation sewage treatment system and the method thereof, the non-supported ozone catalytic oxidation unit is used, so that the catalytic oxidation effect of ozone is not reduced due to inactivation caused by the falling of active components caused by long-time use of a catalyst;
(2) according to the non-supported ozone catalytic oxidation sewage treatment system and the method thereof, the non-supported ozone catalytic oxidation unit is used, the risk of catalyst poisoning is avoided, a catalyst reactivation system is not needed, and the service life of the catalyst is long;
(3) compared with a supported ozone catalyst, the non-supported ozone catalytic oxidation sewage treatment system and the non-supported ozone catalytic oxidation sewage treatment method do not need an ozone catalytic oxidation unit gas washing and backwashing system, and are simple in system, convenient to use and small in engineering investment.
(4) According to the non-load type ozone catalytic oxidation sewage treatment system and the method thereof, water is taken from the water outlet area of the non-load type ozone catalytic oxidation unit as circulating water, unreacted ozone carried in the circulating water can be fully utilized, and the reaction efficiency is high.
(5) The invention provides a non-load type ozone catalytic oxidation sewage treatment system and a method thereof.
(6) According to the non-load type ozone catalytic oxidation sewage treatment system and the method thereof, treated sewage passes through the water outlet unit, so that ozone tail gas carried in outlet water overflows, and the normal operation of a subsequent system is prevented from being interfered.
(7) According to the non-load type ozone catalytic oxidation sewage treatment system and the method thereof, the tail gas treatment unit is arranged, so that the collection of ozone tail gas and the decomposition and damage of ozone are realized, and secondary pollution is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram according to a second embodiment of the present invention;
FIG. 3 is a schematic view of a water and air distribution pipe according to the present invention;
FIG. 4 is a schematic view of a circulating water pipe according to the present invention;
fig. 5 is a partially enlarged view of a in fig. 1.
Wherein, 1, a water inlet unit; 2. a water inlet pipe of a water inlet pump; 3. a water inlet pump; 4. a water outlet pipe of the water inlet pump; 5. a filtration unit; 6. a water outlet pipe of the filtering unit; 7. a non-supported ozone catalytic oxidation unit; 7-1, a water distribution and gas distribution area; 7-2, water and air distribution pipes; 7-3, synergistic nozzles; 7-4, a support plate; 7-5, a water cap; 7-6, a supporting layer; 7-7, a catalyst zone; 7-8 parts of non-supported ozone catalyst; 7-9, a water outlet area; 7-10 parts of a circulating water main pipe; 7-10-1 parts of circulating water branch pipes; 7-10-2 parts of water outlet holes; 7-11 parts of a circulating water gap; 7-12 parts of water outlet; 7-13, tail gas zone; 8. a water outlet pipe of the circulating water pump; 9. an ozone generator; 9-1, an ozone inlet pipe; 10. a water ejector; 11. a water circulating pump; 12. a water inlet pipe of a circulating water pump; 13. a water outlet pipe; 14. a water outlet unit; 14-1, a system water outlet pipe; 14-2, a gallery; 15-1, a first tail gas collecting pipe; 15-2, a first tail gas collection valve; 15-3, a second tail gas collecting pipe; 15-4, a second tail gas collection valve; 16. and a tail gas treatment unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
The first embodiment is as follows:
with reference to figures 1 and 3 of the drawings, 4. 5, this embodiment provides a non-load type catalytic ozonation sewage treatment system, which includes a water inlet unit 1, the water inlet unit 1 is communicated with the bottom of a non-load type catalytic ozonation unit 7, the top of the non-load type catalytic ozonation unit 7 is communicated with a tail gas treatment unit 16, the upper portion of the side wall of the non-load type catalytic ozonation unit 7 is communicated with a water outlet unit 14, the top of the water outlet unit 14 is communicated with the tail gas treatment unit 16, the side wall of the non-load type catalytic ozonation unit 7 is communicated with a water outlet circulation unit, the inlet end of the water outlet circulation unit is communicated with the upper portion of the side wall of the non-load type catalytic ozonation unit 7, the outlet end of the water outlet circulation unit is communicated with the lower portion of the side wall of the non-load type catalytic ozonation unit 7, and the communication position of the water outlet unit 14 and the non-load type catalytic ozonation unit 7 is higher than the inlet end of the water outlet circulation unit.
In a further optimized scheme, the non-load type ozone catalytic oxidation unit 7 comprises a water and gas distribution area 7-1, a catalyst area 7-7, a water outlet area 7-9 and a tail gas area 7-13 which are sequentially arranged from bottom to top. The non-load type ozone catalytic oxidation unit 7 is a closed reaction tank or a reaction tower.
In a further optimized scheme, the side wall of the water and gas distribution area 7-1 is communicated with one end of a water and gas distribution pipe 7-2, the water and gas distribution pipe 7-2 is communicated with the outlet end of the water outlet circulation unit, the water and gas distribution pipe 7-2 is communicated with a plurality of synergistic nozzles 7-3, and the synergistic nozzles 7-3 are communicated with the water and gas distribution pipe 7-2 through branch pipes. And 7-3 of synergistic nozzles, so that the ozone-dissolved water is distributed more uniformly.
According to a further optimization scheme, a supporting plate 7-4 is arranged between the catalyst area 7-7 and the water and air distribution area 7-1, a plurality of water caps 7-5 are mounted on the supporting plate 7-4, a supporting layer 7-6 is arranged above the supporting plate 7-4, a non-supported ozone catalyst 7-8 is filled in the catalyst area 7-7, and the non-supported ozone catalyst 7-8 is located above the supporting layer 7-6. The thickness of the bearing layer 7-6 is 200-300 mm. The non-load type ozone catalyst 7-8 is one or more of iron oxyhydroxide, manganese dioxide, cobalt oxide, nickel oxide and copper oxide, and catalyzes ozone to generate hydroxyl radicals with strong oxidizing property so as to remove pollutants in the sewage. When the non-supported ozone catalyst 7-8 is a plurality of oxides, the mass ratio of the oxides is 1: 1.
according to a further optimization scheme, the side wall of the water outlet area 7-9 is communicated with a circulating water main pipe 7-10, the circulating water main pipe 7-10 is communicated with a plurality of circulating water branch pipes 7-10-1, the circulating water branch pipes 7-10-1 are provided with a plurality of water outlet holes 7-10-2, the plurality of water outlet holes 7-10-2 are opened upwards, the circulating water main pipe 7-10 is communicated with the inlet end of the water outlet circulating unit through a circulating water port 7-11, the side wall of the water outlet area 7-9 is communicated with a water outlet unit 14 through a water outlet 7-12, and the circulating water port 7-11 is positioned below the water outlet 7-12. The diameter of the water outlet hole 7-10-2 is 10-12 mm, so that the non-load type ozone catalytic oxidation unit 7 can uniformly discharge water on the whole water passing section, and short flow is avoided.
In a further optimized scheme, the top of the tail gas area 7-13 is communicated with one end of a first tail gas collecting valve 15-2, and the other end of the first tail gas collecting valve 15-2 is communicated with a tail gas processing unit 16 through a first tail gas collecting pipe 15-1. The tail gas treatment unit 16 is a commercially available ozone tail gas destructor for decomposing and destroying ozone to ensure that the tail gas reaches the standard and is discharged, and a catalytic decomposition or thermal decomposition method is adopted to decompose the ozone in the tail gas.
According to a further optimized scheme, the water outlet circulation unit comprises a circulating water pump 11, the inlet end of the circulating water pump 11 is communicated with a circulating water port 7-11 through a circulating water pump water inlet pipe 12, the outlet end of the circulating water pump 11 is communicated with one end of a circulating water pump water outlet pipe 8, the other end of the circulating water pump water outlet pipe 8 is communicated with a water distribution and air distribution pipe 7-2, a water ejector 10 is arranged on the circulating water pump water outlet pipe 8, the water ejector 10 is communicated with one end of an ozone inlet pipe 9-1, and the other end of the ozone inlet pipe 9-1 is communicated with an ozone generator 9. An air inlet of the water ejector 10 is connected with the ozone generator 9 through an ozone inlet pipe 9-1, so that ozone generated by the ozone generator 9 is dissolved in circulating water through the water ejector 10 and enters the non-load type ozone catalytic oxidation unit 7.
According to a further optimization scheme, the water outlet unit 14 comprises a closed water outlet contact tank, one end of the water outlet contact tank is communicated with a water outlet 7-12 through a water outlet pipe 13, the other end of the water outlet pipe 13 is communicated with the bottom of the side wall of the water outlet contact tank, a plurality of galleries 14-2 are arranged in the water outlet contact tank, the upper portion of the side wall of the water outlet contact tank is communicated with a system water outlet pipe 14-1, the system water outlet pipe 14-1 is lower than the liquid level of the water outlet contact tank, the system water outlet pipe 14-1 is located on the side opposite to the water outlet pipe 13, the top of the water outlet contact tank is communicated with one end of at least one second tail gas collecting valve 15-4, and the other end of the second tail gas collecting valve 15-4 is communicated with the tail gas treatment unit 16 through a second tail gas collecting pipe 15-3. A plurality of galleries 14-2 are arranged in the water outlet unit 14, ozone tail gas carried in the outlet water overflows by continuously changing the water flow direction, and enters the tail gas treatment unit 16 through the second tail gas collecting pipe 15-3.
According to the further optimization scheme, the water inlet unit 1 comprises a water inlet tank, the bottom of the side wall of the water inlet tank is communicated with a water inlet end of a water inlet pump 3 through a water inlet pump water inlet pipe 2, and a water outlet end of the water inlet pump 3 is communicated with the bottom of the water distribution and air distribution area 7-1 through a water inlet pump water outlet pipe 4.
A method for treating sewage by non-load type ozone catalytic oxidation adopts the sewage treatment system in the technical scheme;
in the embodiment, when sewage is treated, water in a water inlet tank of a water inlet unit 1 is subjected to one or more treatments of microfiltration, ultrafiltration, nanofiltration and reverse osmosis systems, the sewage is sent to a water distribution and air distribution area 7-1 through a water inlet pump 3 communicated with the water inlet unit 1, the sewage enters a water outlet area 7-9 after being subjected to ozone catalytic oxidation reaction in a catalyst area 7-7, water in the water outlet area 7-9 is sent to a water distribution and air distribution pipe 7-2 of the water distribution and air distribution area 7-1 through a water outlet 7-10-2, a circulating water main pipe 7-10 and a circulating water pump 11, synergistic nozzles 7-3 are arranged on the water distribution and air distribution pipe 7-2 to further dissolve the ozone in the water, a water ejector 10 is communicated with a circulating water outlet pipe 8, the water ejector 10 is communicated with an ozone generator 9, an air inlet of the water ejector 10 is connected with the ozone generator 9 through an ozone inlet pipe 9-1, ozone generated by the ozone generator 9 is dissolved in circulating water through the water ejector 10, and the catalytic oxidation reaction of ozone is continuously generated in the non-load type catalytic ozone oxidation unit 7;
the reacted water is sent to a water outlet unit 14, the waste gas after reaction in a catalyst area 7-7 in the non-load type ozone catalytic oxidation unit 7 is sent to a tail gas treatment unit 16 through a tail gas area 7-13 and a first tail gas collecting valve 15-2, and is subjected to ozone decomposition and then is discharged after reaching the standard;
the reacted water passes through the water outlet unit 14, a plurality of galleries 14-2 are arranged in the water outlet unit 14, ozone tail gas possibly carried in the outlet water overflows by continuously changing the water flow direction, and enters the tail gas treatment unit 16 through the second tail gas collecting pipe 15-3 to send residual gas in the water into the tail gas treatment unit 16, and the residual gas is subjected to ozone decomposition and then is discharged after reaching the standard.
The method of the embodiment is used for treating biochemical effluent of certain pharmaceutical wastewater. The COD of the raw water is 100-120 mg/L, the COD is 45-50 mg/L after the treatment of the system, the removal rate of the COD is 55-58%, and the removal amount of ozone/COD is 1.05-1.2. The wastewater is treated by the system, so that a good COD (chemical oxygen demand) removal effect and high ozone utilization efficiency are achieved.
Example two:
referring to fig. 2, the sewage treatment system of the present embodiment is different from the first embodiment only in that water in the water inlet tank of the water inlet unit 1 is obtained by precipitation, the water outlet end of the water inlet pump 3 is communicated with the inlet end of the filtering unit 5 through the water inlet pump water outlet pipe 4, the outlet end of the filtering unit 5 is communicated with the bottom of the water distribution and air distribution area 7-1 of the non-load type ozone catalytic oxidation unit 7 through the water outlet pipe 6 of the filtering unit, the water inlet pump 3 pumps the sewage in the water inlet unit 1 into the filtering unit 5, and then the sewage enters the non-load type ozone catalytic oxidation unit 7, and colloid and suspended matters possibly carried in the inlet water are removed by the filtering unit 5, so that the blocking of the non-load type ozone catalytic oxidation unit 7 is avoided.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims (7)

1. The utility model provides a non-load type ozone catalytic oxidation handles sewage system which characterized in that: comprises a water inlet unit (1), the water inlet unit (1) is communicated with the bottom of a non-load type ozone catalytic oxidation unit (7), the top of the non-load type ozone catalytic oxidation unit (7) is communicated with a tail gas treatment unit (16), the upper part of the side wall of the non-load type ozone catalytic oxidation unit (7) is communicated with a water outlet unit (14), the top of the water outlet unit (14) is communicated with the tail gas treatment unit (16), the side wall of the non-load type ozone catalytic oxidation unit (7) is communicated with a water outlet circulation unit, the inlet end of the water outlet circulation unit is communicated with the upper part of the side wall of the non-load type ozone catalytic oxidation unit (7), the outlet end of the water outlet circulation unit is communicated with the lower part of the side wall of the non-load type ozone catalytic oxidation unit (7), the communication position of the water outlet unit (14) and the non-load type ozone catalytic oxidation unit (7) is higher than the inlet end of the water outlet circulation unit;
the non-load type ozone catalytic oxidation unit (7) comprises a water and gas distribution area (7-1), a catalyst area (7-7), a water outlet area (7-9) and a tail gas area (7-13) which are sequentially arranged from bottom to top;
the side wall of the water outlet area (7-9) is communicated with a circulating water main pipe (7-10), the circulating water main pipe (7-10) is communicated with a plurality of circulating water branch pipes (7-10-1), the circulating water branch pipes (7-10-1) are provided with a plurality of water outlet holes (7-10-2), the plurality of water outlet holes (7-10-2) are opened upwards, the circulating water main pipe (7-10) is communicated with the inlet end of the water outlet circulating unit through a circulating water port (7-11), the side wall of the water outlet area (7-9) is communicated with the water outlet unit (14) through a water outlet (7-12), and the circulating water port (7-11) is positioned below the water outlet (7-12);
the water outlet circulation unit comprises a circulating water pump (11) with an inlet end communicated with the circulating water port (7-11) through a circulating water pump water inlet pipe (12), the outlet end of the circulating water pump (11) is communicated with one end of a circulating water pump water outlet pipe (8), the other end of the circulating water pump water outlet pipe (8) is communicated with a water distribution and air distribution pipe (7-2), a water ejector (10) is arranged on the circulating water pump water outlet pipe (8), one end of an ozone inlet pipe (9-1) is communicated with the water ejector (10), and the other end of the ozone inlet pipe (9-1) is communicated with an ozone generator (9).
2. The system for treating sewage through catalytic oxidation of non-supported ozone as claimed in claim 1, wherein: the side wall of the water and air distribution area (7-1) is communicated with one end of the water and air distribution pipe (7-2), the water and air distribution pipe (7-2) is communicated with the outlet end of the water outlet circulation unit, the water and air distribution pipe (7-2) is communicated with a plurality of synergistic nozzles (7-3), and the synergistic nozzles (7-3) are communicated with the water and air distribution pipe (7-2) through branch pipes.
3. The system for treating sewage through catalytic oxidation of non-supported ozone as claimed in claim 1, wherein: a supporting plate (7-4) is arranged between the catalyst area (7-7) and the water and air distribution area (7-1), a plurality of water caps (7-5) are mounted on the supporting plate (7-4), a supporting layer (7-6) is placed above the supporting plate (7-4), a non-supported ozone catalyst (7-8) is filled in the catalyst area (7-7), and the non-supported ozone catalyst (7-8) is located above the supporting layer (7-6).
4. The system for treating sewage through catalytic oxidation of non-supported ozone as claimed in claim 1, wherein: the top of the tail gas area (7-13) is communicated with one end of a first tail gas collecting valve (15-2), and the other end of the first tail gas collecting valve (15-2) is communicated with the tail gas processing unit (16) through a first tail gas collecting pipe (15-1).
5. The system for treating sewage through catalytic oxidation of non-supported ozone as claimed in claim 1, wherein: the water outlet unit (14) comprises a closed water outlet contact tank, one end of the water outlet contact tank is communicated with the water outlets (7-12) through a water outlet pipe (13), the other end of the water outlet pipe (13) is communicated with the bottom of the side wall of the water outlet contact tank, a plurality of galleries (14-2) are arranged in the water outlet contact tank, the upper part of the side wall of the effluent contact tank is communicated with a system water outlet pipe (14-1), the system water outlet pipe (14-1) is lower than the liquid level of the effluent contact tank, the water outlet pipe (14-1) of the system is positioned at one side opposite to the water outlet pipe (13), the top of the water outlet contact tank is communicated with one end of at least one second tail gas collecting valve (15-4), the other end of the second tail gas collecting valve (15-4) is communicated with the tail gas treatment unit (16) through a second tail gas collecting pipe (15-3).
6. The system for treating sewage through catalytic oxidation of non-supported ozone as claimed in claim 1, wherein: the water inlet unit (1) comprises a water inlet tank, the bottom of the side wall of the water inlet tank is communicated with a water inlet end of a water inlet pump (3) through a water inlet pump inlet pipe (2), a water outlet end of the water inlet pump (3) is communicated with an inlet end of a filtering unit (5) through a water inlet pump outlet pipe (4), and an outlet end of the filtering unit (5) is communicated with the bottom of a water and air distribution area (7-1) through a filtering unit outlet pipe (6).
7. A method for treating sewage by non-load type ozone catalytic oxidation is characterized in that: the method employs the sewage treatment system of any of claims 1-6;
sewage is sent to the bottom of a non-load type ozone catalytic oxidation unit (7) through a water inlet unit (1), ozone is input into the non-load type ozone catalytic oxidation unit (7) through a water outlet circulation unit, and an ozone catalytic oxidation reaction is generated in the non-load type ozone catalytic oxidation unit (7);
the reacted water is sent to the water outlet unit (14), residual gas in the water is sent to the tail gas treatment unit (16), and waste gas after reaction of the non-load type ozone catalytic oxidation unit (7) is sent to the tail gas treatment unit (16) and is subjected to ozone decomposition and then is discharged after reaching the standard.
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