CN204310916U - Petrochemical wastewater advanced treatment system - Google Patents

Petrochemical wastewater advanced treatment system Download PDF

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Publication number
CN204310916U
CN204310916U CN201420721675.0U CN201420721675U CN204310916U CN 204310916 U CN204310916 U CN 204310916U CN 201420721675 U CN201420721675 U CN 201420721675U CN 204310916 U CN204310916 U CN 204310916U
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water
baf
advanced treatment
petrochemical wastewater
pipeline
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CN201420721675.0U
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陈俊刚
周国苗
杨继飞
俞阜东
孙铭浩
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Zhejiang Environmental Engineering Co Ltd
Environmental Engineering Corp
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Zhejiang Environmental Engineering Co Ltd
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Abstract

The utility model discloses a kind of petrochemical wastewater advanced treatment system, described system comprises the oxidizing tower, ramp pan, BAF, valveless filtering pool and the reuse pool that connect successively; Described BAF side-lower is provided with air water associating import, and described air water associating import is connected with aeration blower, air water reverse flushing device respectively, and described BAF is provided with recoil water outlet.System of the present utility model eliminates second pond and sludge reflux facility, and system architecture is simple, floor space is little, operational management is convenient; Promote in petroleum chemical enterprise's advanced treatment of industrial waste water or all there is greater advantage in transformation.

Description

Petrochemical wastewater advanced treatment system
Technical field
The utility model relates to petrochemical wastewater treatment system, particularly relates to a kind of petrochemical wastewater advanced treatment system.
Background technology
Saving water resource, water conservation are the current outstanding problems being badly in need of paying attention to of country.In recent years, China's oil chemical engineering industry is fast-developing, and the quantity discharged of its factory effluent also increases thereupon year by year.Reuse after advanced treatment is carried out to Petrochemical Industry Waste Water, not only can reduce the pollution of sewage to environment, low water usage cost can also be fallen, improve the repeating utilization factor of process water, thus slow down the nervous situation of process water.Therefore, adopt suitable technology to carry out advanced treatment to petrochemical wastewater and reach reuse requirement, not only have great meaning to protection of the environment, and to the energy-saving and emission-reduction work of petroleum chemical enterprise, there is directive significance.
Petrochemical wastewater contains various inorganic salt and organic waste water composition primarily of what produce in oil production and refining process, and it contains the pollutents such as oil, ammonia, salt and phenol, and complicated component, intractability is larger.After secondary biochemical treatment, most suspended solids and organism are removed, and effluent COD concentration is relatively low, but still there is complicated component, characteristic contamination is more, biodegradability is poor, suspended substance is less feature.At present, petrochemical wastewater advanced treatment process has physico-chemical process, chemical method and biochemical process:
Physico-chemical process treatment technology mainly contains absorption method and membrane sepn, wherein normal the and ozone oxidation of absorption or coupling of flocculating, and membrane separation technique mainly comprises several class methods such as micro-filtration, ultrafiltration, nanofiltration and reverse osmosis.Physico-chemical process operation is the simplest, but such treatment technology processing cost is higher; Although activated carbon adsorption is effective, running cost is higher continuously, and easily causes secondary pollution.Current sorbing material and the cost of manufacture of mould material constrain the application of correlation technique.
Chemical method mainly contains chemical flocculation, ozone oxidation, photoxidation, wet oxidation etc., is to run very fast, the good treatment process for the treatment of effect.Wherein chemical flocculation can reduce turbidity and the colourity of sewage, removes multiple polymer substance, organism, certain heavy metal species etc., usually with air supporting or need precipitate coupling, but the use of organic floculant can increase the COD of water outlet, can have a negative impact to treatment effect; Although ozone oxidation and the method such as photoxidation, wet oxidation can remove chroma in waste water, stink and COD etc. effectively, processing cost is higher.And the water yield of process has considerable restraint; When wastewater flow rate is larger, ozonation aerated amount will increase sharply processing cost.
Biological treatment has that efficiency is high, effective, treatment capacity is large, applied widely and low cost and other advantages, and adopt separately bioprocess technology to be difficult to the waste water after making two stage biological process again and carry out advanced treatment, and increase overall design cost, floor space is larger.The cycle of operation of biological treatment is long in addition, does not have the thorough rapidly of chemical Treatment.General in advanced treatment many employings be compound bio process integration, by the method that physico-chemical process and biological treatment are combined.
In addition, in order to reach good treatment effect, the petrochemical wastewater advanced treatment system of current employing compound bio process integration forms equal more complicated, need to arrange the facility such as second pond and sludge refluxing apparatus, production cost returns production and construction while remaining high and operation management brings inconvenience.
Utility model content
The purpose of this utility model is that overcoming the system existed in above-mentioned prior art forms the deficiencies such as complicated, provides a kind of novel petrochemical wastewater advanced treatment system.System architecture of the present utility model is simple, floor space is little, operational management is convenient; Advanced treatment can be carried out to reaching reuse requirement to petrochemical wastewater secondary effluent simultaneously.
The purpose of this utility model is solved by following technical proposals:
The utility model relates to a kind of petrochemical wastewater advanced treatment system, and described system comprises the oxidizing tower, ramp pan, BAF, valveless filtering pool and the reuse pool that connect successively; Described BAF side lower part (position near bottom) is provided with air water associating import, and described air water associating import is connected with aeration blower, air water reverse flushing device respectively, and described BAF is provided with recoil water outlet.
Preferably, described air water reverse flushing device comprises gas back flushing path and water backwashing path; Described gas back flushing path comprises back flushing blower fan and gas Backwash pipeline, described water backwashing path comprises backwash pump and water backwashing pipeline, described gas Backwash pipeline is combined import with air water and is connected, and water backwashing pipeline is connected to reuse pool and combines between import with air water; Back flushing blower fan is positioned on the path of gas Backwash pipeline, and backwash pump is positioned on the path of water backwashing pipeline.
Preferably, the recoil water outlet of described BAF is connected with plant area water collecting basin through back flushing rising pipe.
Preferably, described oxidizing tower side-lower is provided with oxygenant and adds mouth.
Preferably, described oxygenant adds mouth and adds mouth and hydrogen peroxide by ozone and add mouth and form.
Preferably, the top that described oxidizing tower and oxygenant add mouthful homonymy is provided with water-in, and described water-in is connected with petrochemical wastewater secondary effluent mouth by inlet channel, lift pump; The bottom that described oxidizing tower and oxygenant add mouthful heteropleural is provided with water outlet, and described water outlet is connected by the import of pipeline with ramp pan top.
Preferably, the aerated conduit be connected with described aeration blower is provided with in described ramp pan; Ramp pan middle and lower part is located at described aeration tube road junction.
Preferably, described system also comprises time lift pump be connected with reuse pool.
Preferably, described oxidizing tower is connected by pipeline with ramp pan, described BAF, valveless filtering pool are connected by pipeline successively with reuse pool, described ramp pan and BAF are fitted and are arranged, described ramp pan and BAF are fitted and are arranged, and described ramp pan water outlet is entered bottom BAF by bottom opening.
Compared with prior art, the utility model has following beneficial effect:
(1) system of the present utility model eliminates second pond and sludge reflux facility, and treatment effect is good, and floor space is little, and operational management is convenient, promotes or all have greater advantage in transformation in petroleum chemical enterprise's advanced treatment of industrial waste water.
(2) mouth is added by arranging oxygenant at oxidizing tower side-lower, realize ozone and hydrogen peroxide co-oxidation technique, not only can cross removal part colourity, effectively can promote the removal of recalcitrant substance and the raising of B/C, for good condition is created in subsequent biochemical process; Can oxidation capacity be improved, reduce working cost; The reaction product of ozone oxidation and hydrogen peroxide can not increase the salt in sewage.
(3) by arranging ramp pan and arrange aerated conduit in ramp pan, to make in oxidizing tower water outlet residual a small amount of ozone be able to blowing air stripping in ramp pan and divide and take off, then enter BAF, improve processing efficiency.
(4) by arranging air water reverse flushing device at BAF side-lower, realizing back flushing air water and upwards flowing by the bottom of pond, adopt forced-air blast aeration simultaneously, make to bring about the desired sensation, water carries out fabulous dividing equally, prevent the condensation of bubble in filtrate, oxygen utilization rate is high, and energy consumption is low; Adequately achieve the concentrated and high-efficient contact of pollution substance, dissolved oxygen and organism, impel the decomposition of hard-degraded substance further.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features of the present utility model, object and advantage will become more obvious:
Fig. 1 is schematic flow sheet of the present utility model;
Wherein, 1 is oxidizing tower, and 2 is ramp pan, and 3 is BAF, and 4 is valveless filtering pool, and 5 is reuse pool, and 6 is lift pump, and 7 add mouth for oxygenant, and 8 is aeration blower, and 9 is backwash pump, and 10 is back flushing blower fan, and 11 are back lift pump.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.Be below that embodiment will contribute to those skilled in the art and understands the utility model further, but do not limit the utility model in any form.It should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, some distortion and improvement can also be made.These all belong to protection domain of the present utility model.
embodiment
The structural representation of the petrochemical wastewater advanced treatment system of the present embodiment as shown in Figure 1; Described system comprises oxidizing tower 1, ramp pan 2, BAF 3, valveless filtering pool 4 and reuse pool 5.Described oxidizing tower 1 is connected by pipeline with ramp pan 2, described BAF 3, valveless filtering pool 4 are connected by pipeline successively with reuse pool 5, described ramp pan 2 is fitted with BAF 3 and is arranged, and described ramp pan water outlet is entered bottom BAF by bottom opening.Described BAF 3 side-lower (position near bottom) is provided with air water associating import, and described air water associating import is connected with aeration blower 8, air water reverse flushing device respectively, and described BAF 3 is provided with recoil water outlet.Described air water reverse flushing device comprises gas back flushing path and water backwashing path; Described gas back flushing path comprises back flushing blower fan 10 and gas Backwash pipeline, described water backwashing path comprises the backwash pump 9 and water backwashing pipeline that are connected with reuse pool 5, and described gas Backwash pipeline, water backwashing pipeline are combined import with air water and be connected.The recoil water outlet of described BAF 3 is connected with plant area water collecting basin through back flushing rising pipe.Described oxidizing tower 1 side-lower is provided with oxygenant and adds mouth 7.It can be single port that this oxygenant adds mouth 7, can be connected with ozone transport conduit or hydrogen peroxide transport pipe.Preferably, this oxygenant adds mouth 7 for twoport, and the hydrogen peroxide adding mouth and below by the ozone of top adds mouth and forms, and described ozone adds mouth and ozone transport conduit, and described hydrogen peroxide adds mouth and is connected with hydrogen peroxide transport pipe.Described oxidizing tower 1 adds above mouth 7 homonymy with oxygenant and is provided with water-in, and described water-in is connected with secondary effluent by inlet channel, lift pump 6; Described oxidizing tower 1 adds below mouth 7 heteropleural with oxygenant and is provided with water outlet, and described water outlet is connected with the import above ramp pan 2 by pipeline.The aerated conduit be connected with described aeration blower 8 is provided with in described ramp pan 2; Ramp pan 2 middle and lower part is located at described aeration tube road junction.The system of the present embodiment also comprises time lift pump 11 be connected with reuse pool 5; Utilize reuse lift pump 11 to promote and carry out reuse.
Petrochemical wastewater advanced treatment system of the present utility model to the principle that petrochemical wastewater carries out advanced treatment is:
Secondary effluent enters oxidizing tower 1 by lift pump 6, with added the ozone that mouth 7 passes into and the hydrogen peroxide co-oxidation added by oxygenant under, removes part COD and decolouring.Meanwhile, in sewage, not easily the organic pollutant of bio-oxidation, under the Strong oxdiative Decomposition of ozone, is transformed into biodegradable and organism that is readily biodegradable, improves the B/C of waste water, for follow-up aeration and biological filter running creates favorable conditions.
Oxidizing tower 1 water outlet is due to residual a small amount of ozone, and in ramp pan 2, blowing air stripping divides and takes off, then enters BAF 3.Water distribution system bottom BAF 3 upwards flows at the bottom of by pond, adopt forced-air blast aeration (being provided by aeration blower 8) simultaneously, make to bring about the desired sensation, water carries out fabulous dividing equally, prevent the condensation of bubble in filtrate, oxygen utilization rate is high, and energy consumption is low; Adopt the parallel upward flow of air water, make to filter between friendship and can be used better, the solid matter in sewage can be brought into filter bed depths by air, can obtain high loading, uniform solid matter in filter tank, extend backwashing period, reduce water, tolerance when scavenging period and cleaning.BAF 3 by microorganism, dissolved oxygen, Adsorption of Organic/filtration/biological degradation, thus cuts down the removal of refractory organic compounds greatly, further removes COD and ammonia nitrogen.Simultaneously by the form of absorption iron, calcium carbonate, greatly reduce the iron level in water and waste water hardness.
BAF 3 adopts combined water and air backwash, establishes backwash pump 9 in reuse pool 5, to adopt in BAF 3 water outlet and reuse pool 5 water as back flushing water source; Aeration fan 8 and back flushing blower fan 10 are set.Back flushing draining enters the precipitation process unit of Waste Water Treatment by back flushing water outlet, plant area's waste pipe gravity flow.
BAF 3 water outlet gravity flows into valveless filtering pool 4, further organics removal and suspended substance, and ensure effluent quality, gravity flows into reuse pool 5, is promoted to reuse place carries out reuse with time lift pump 11.
By the waste water of the petrochemical wastewater advanced treatment system of the present embodiment application process certain chemical enterprise, concrete technology is as follows:
Petrochemical wastewater secondary effluent adopts lift pump 6 to oxidizing tower 1, adds mouth 7 drop into ozone and hydrogen peroxide at the oxygenant of oxidizing tower, and after reaction, water outlet flows into ramp pan 2.
Stretch into aerated conduit by aeration blower 8 above the pond of ramp pan 2, stripping divides takes off the residual a small amount of ozone of waste water, and water outlet flows into BAF 3.Carry air to BAF 3 by aeration blower 8.Carry backwashing water to BAF 3 by backwash pump 9 set in reuse pool 5, back flushing blower fan 10 is set and carries air to BAF 3, carry out air-water backwashing.BAF 3 is provided with back flushing water outlet, carries back flushing water outlet through back flushing rising pipe to plant area's water collecting basin.
Result of implementation: the influent waste water water-quality COD of this family's chemical enterprise is 120mg/L, iron 0.85mg/L, colourity 40 times, and it is 54mg/L, iron 0.10mg/L, colourity 10 times that water outlet can reach COD respectively.
Above specific embodiment of the utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present utility model.

Claims (9)

1. a petrochemical wastewater advanced treatment system, is characterized in that, described system comprises the oxidizing tower, ramp pan, BAF, valveless filtering pool and the reuse pool that connect successively; Described BAF side lower part is provided with air water associating import, and described air water associating import is connected with aeration blower, air water reverse flushing device respectively, and described BAF is provided with recoil water outlet.
2. petrochemical wastewater advanced treatment system according to claim 1, is characterized in that, described air water reverse flushing device comprises gas back flushing path and water backwashing path; Described gas back flushing path comprises back flushing blower fan and gas Backwash pipeline, described water backwashing path comprises backwash pump and water backwashing pipeline, described gas Backwash pipeline is combined import with air water and is connected, and water backwashing pipeline is connected to reuse pool and combines between import with air water; Back flushing blower fan is positioned on the path of gas Backwash pipeline, and backwash pump is positioned on the path of water backwashing pipeline.
3. petrochemical wastewater advanced treatment system according to claim 1, is characterized in that, the recoil water outlet of described BAF is connected with plant area water collecting basin through back flushing rising pipe.
4. petrochemical wastewater advanced treatment system according to claim 1, is characterized in that, described oxidizing tower side lower part is provided with oxygenant and adds mouth.
5. petrochemical wastewater advanced treatment system according to claim 4, is characterized in that, described oxygenant adds mouth and adds mouth and hydrogen peroxide by ozone and add mouth and form.
6. petrochemical wastewater advanced treatment system according to claim 4, is characterized in that, the top that described oxidizing tower and oxygenant add mouthful homonymy is provided with water-in, and described water-in is connected with petrochemical wastewater secondary effluent mouth by inlet channel, lift pump; The bottom that described oxidizing tower and oxygenant add mouthful heteropleural is provided with water outlet, and described water outlet is connected by the import of pipeline with ramp pan top.
7. petrochemical wastewater advanced treatment system according to claim 1, is characterized in that, is provided with the aerated conduit be connected with described aeration blower in described ramp pan; Ramp pan middle and lower part is located at described aeration tube road junction.
8. petrochemical wastewater advanced treatment system according to claim 1, is characterized in that, described system also comprises time lift pump be connected with reuse pool.
9. petrochemical wastewater advanced treatment system according to claim 1, it is characterized in that, described oxidizing tower is connected by pipeline with ramp pan, described BAF, valveless filtering pool are connected by pipeline successively with reuse pool, described ramp pan and BAF are fitted and are arranged, and described ramp pan water outlet is entered bottom BAF by bottom opening.
CN201420721675.0U 2014-11-26 2014-11-26 Petrochemical wastewater advanced treatment system Active CN204310916U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104909499A (en) * 2015-06-10 2015-09-16 上海化学工业区中法水务发展有限公司 Petrochemical wastewater secondary effluent treatment method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104909499A (en) * 2015-06-10 2015-09-16 上海化学工业区中法水务发展有限公司 Petrochemical wastewater secondary effluent treatment method

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